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Graphene-cladded sulfur/microporous carbon sphere composite cathode material
InactiveCN104269543AGive full play to the advantagesImprove conductivityCell electrodesSecondary cellsComposite cathodeSulfur
The invention discloses a composite cathode material for secondary aluminum batteries. The composite cathode material is formed by compounding microporous carbon spheres, sulfur and graphene, has good electric conductivity and is capable of effectively suppressing that polysulfide dissolves in electrolyte to cause the shuttle effect. The preparation method of the composite cathode material comprises the following steps: firstly compounding the microporous carbon spheres and the sulfur, and then cladding the outer layer of the composition with a graphene sheet layer. The preparation method is simple in process and low in cost, toxic raw materials are not used, environment friendliness is achieved, the energy density is high, the utilization ratio of the sulfur is high, and the rate capability and the cycle performance of the secondary aluminum batteries are improved greatly.
Owner:NANJING ZHONGCHU NEW ENERGY
CoS graded nano-bubble composite sulfur positive electrode material of lithium sulfur battery and preparation method of positive electrode material
ActiveCN108448093AImprove charge and discharge response abilityImprove conductivityMaterial nanotechnologyCell electrodesVulcanizationCharge discharge
The invention discloses a CoS graded nano-bubble composite S positive electrode material of a lithium sulfur battery, and belongs to the technical field of the lithium sulfur battery. The preparationmethod of the CoS graded nano-bubble composite S positive electrode material comprises the steps of firstly, synthesizing TiO2 composite hexadecylamine nanoparticle by hydrolysis of titanium isopropoxide; secondly, coating a surface of the TiO2 composite hexadecylamine nanoparticle with a layer of MOF-loying PVP so that the TiO2 composite nanoparticle can be absorbed during the growth process of ZIF67 and a surface is embedded and an interior are buried onto ZIF-67 to form a Chinese data structure; and finally, performing vulcanization to obtain a CoS graded nano-bubble material with a plurality of CoS hollow spheres sleeving a CoS hollow polyhedron by hydrothermal method of thioacetamide, and injecting S into the CoS graded nano bubbles by a melting method to obtain a final material. TheCoS graded nano-bubble composite S provided by the invention is used as a lithium sulfur battery positive electrode, relatively high charge-discharge performance and stable cycle property are shown, and the important application value in the field of the lithium sulfur battery is achieved.
Owner:CHINA JILIANG UNIV
Three-dimensional multilayer electric heating composite material with filled structures and method for preparing three-dimensional multilayer electric heating composite material
The invention discloses a three-dimensional multilayer electric heating composite material with filled structures and fabric structures and a method for preparing the three-dimensional multilayer electric heating composite material. The three-dimensional multilayer electric heating composite material comprises three-dimensional woven fabrics with spacing structures. The three-dimensional woven fabrics with the spacing structures are formed by a protective layer, an electric heating layer, a heat-insulation layer and a support layer which are sequentially subjected to composition, and the various layers are integrally bound by spacing yarns. The method includes arranging various layers of warp yarns and spacing yarns according to yarn selection schemes; starting weft insertion devices, leading in various layers of weft yarns and reeling the weft yarns by motors; leading in heat-insulation filled materials; interweaving the spacing yarns and integrally weaving the various layers of warpyarns and weft yarns. The three-dimensional multilayer electric heating composite material and the method have the advantage that the three-dimensional multilayer electric heating composite material prepared by the aid of the method is simple in structure and good in structural integrity, is light, has the properties of damp-heat aging resistance, impact resistance and the like and can be widely applied to the civil and military fields.
Owner:DONGHUA UNIV
Enhancement-type inorganic diaphragm for lithium ion battery and preparation method of enhancement-type inorganic diaphragm
InactiveCN105576177AImprove wettabilityImprove stabilityCell seperators/membranes/diaphragms/spacersSecondary cellsInorganic particleNanofiber
The invention discloses an enhancement-type inorganic diaphragm for a lithium ion battery and a preparation method of the enhancement-type inorganic diaphragm. According to the enhancement-type inorganic diaphragm, inorganic particles are used as a matrix, and high-molecular nanofibers penetrate through the inorganic particle matrix to form an enhancement phase. The enhancement-type inorganic diaphragm is prepared by that an inorganic particle suspension liquid permeates among the high-molecular nanofibers. The enhancement-type inorganic diaphragm prepared by virtue of the preparation method contains a large amount of inorganic particles (more than 65 parts by weight), and the advantages of the inorganic particles are adequately exerted, so that the enhancement-type inorganic diaphragm has excellent electrolyte wettability and high-temperature stability, and the electrochemical performance and the use safety of the lithium ion battery are greatly improved. Meanwhile, by virtue of the high-molecular nanofibers, the enhancement-type inorganic diaphragm has relatively good mechanical strength and flexibility and can meet use and assembling requirements of the lithium ion battery.
Owner:EAST CHINA UNIV OF TECH
Polymer solar cell with subwavelength anti-reflective structure and manufacturing method for polymer solar cell
InactiveCN102544376AHigh light conversion efficiencyReduce reflexesFinal product manufactureSolid-state devicesConductive polymerLight beam
The invention discloses a polymer solar cell with a subwavelength anti-reflective structure. The polymer solar cell comprises a cover plate, a cathode, a donor layer, an acceptor layer and an anode, wherein the donor layer is a conducting polymer layer; the subwavelength anti-reflective structure is arranged on one side of the conducting polymer layer which is close to the cathode and comprises a plurality of bulges of which the structure sizes are less than or equal to 400 nanometers*400 nanometers*400 nanometers; and by the subwavelength anti-reflective structure, the reflective action of light is weakened greatly, and light beams are constrained effectively, so that the light conversion efficiency of the polymer solar cell is improved. The invention also discloses a method for preparing the polymer solar cell with the subwavelength anti-reflective structure. High rigidity among conjugated molecular chains in a conducting polymer is reduced and the flow characteristic of the conducting polymer is improved by an ultrasound field by a processing method for ultrasound composite thermal transfer print, so that the impressing quality is higher. The method is low in processing cost and efficient in processing and has a bright application prospect, and the polymer solar cell is easy to produce industrially.
Owner:ZHEJIANG UNIV
Device for improving the detection sensitivity of laser-induced plasma spectrum
ActiveCN103604780AHigh strengthLong launch lifeAnalysis by material excitationPhysicsWorking environment
The invention discloses a device for improving the detection sensitivity of laser-induced plasma spectrum, aiming at difficulties of LIBS analysis technology in improving the detection sensitivity and reducing effectively the detection limit. According to the theory of the device, based on the physical mechanism of laser-induced plasma and the spatial-temporal evolution process of the plasma, the laser-induced plasma intensity is enhanced and background radiation is reduced by changing the outer space structure and the environment of the laser-induced plasma; and by utilization of multichannel spectral signal collection in different angles, coupling transmission of spectral signals to a spectrograph is achieved by utilization of multi-core fiber, the maximum collection and utilization of spectral signals can be achieved, and space distribution characteristics of the laser-induced plasma can be obtained to improve the detection sensitivity of elements to be detected. The device is compact in structure and can be used conveniently and flexibly. The device is suitable for element detection of all solid materials using the LIBS technology as an analysis means, and can be used in various work environments indoor and outdoor. The device is especially suitable for on-site element detection.
Owner:ANHUI INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
LED extension structure with P type superlattice and preparation method thereof
InactiveCN104600163AIncrease hole concentrationReduce mismatchSemiconductor devicesPeriodic alternatingPotential well
The invention relates to an LED extension structure with P type superlattice and a preparation method thereof. The LED extension structure orderly comprises the following parts from the lower side to the upper side: a substrate, a nucleating layer, a buffer layer, n type GaN layer, a multiple quantum well luminescent layer, a first P type GaN layer, P type AlInN / GaN superlattice and a second P type GaN layer; the P type AlInN / GaN superlattice is composed of the AlInN potential well layer and GaN barrier layer overlapped periodically. The AlInN / GaN superlattice structure is adopted for effectively raising the hole concentration, effectively resisting the electron and useful for expanding the hole, the mismatch of the structure lattice is little, the crystal quality is high after growing. The GaN-based LED with P type structure containing AlInN / GaN superlattice can effectively improve the luminous efficiency of the device.
Owner:SHANDONG INSPUR HUAGUANG OPTOELECTRONICS
Caterpillar type straw pick-up vehicle
The invention relates to a caterpillar type straw pick-up vehicle, and belongs to the technical field of agricultural machines. The caterpillar type straw pick-up vehicle comprises a caterpillar type chassis, a pick-up table and a grass collecting box, and a conveying gap bridge is communicated between the pick-up table and the grass collecting box; the pick-up table comprises a grass poking roll shaft, a pick-up roll shaft and an auger, the auger is arranged adjacent to an inlet of the gap bridge, the two ends of the grass poking roll shaft are hinged to the pick-up table through connecting rods, the grass poking roll shaft and the pick-up roll shaft are arranged vertically oppositely and are capable of rotating in opposite directions, multiple poking teeth are fixed to the grass poking roll shaft along the axis, multiple elastic teeth are fixed to the pick-up roll shaft along the axis, the poking teeth on the grass poking roll shaft and the elastic teeth on the pick-up roll shaft are arranged alternately, and the projection, in the axial direction, of the track formed by rotational scanning of the poking teeth on the grass poking roll shaft coincides with that, in the axial direction, of the track formed by rotational scanning of the elastic teeth on the pick-up roll shaft. The caterpillar type straw pick-up vehicle is capable of picking up and harvesting straw in a common smashed state and capable of collecting and transferring straw bundles.
Owner:NANJING AGRI MECHANIZATION INST MIN OF AGRI
Aramid fiber/polyimide fiber composite insulation paper with excellent breakdown resistance and preparation method thereof
InactiveCN107354808APrevent hydrolysis reactionEffective bondageAgeing prevention agents additionPlastic/resin/waxes insulatorsBreakdown strengthSurface oxidation
The invention discloses aramid fiber / polyimide fiber composite insulation paper with excellent breakdown resistance. The preparation method comprises the following steps: performing surface oxidation heat treatment on aluminum nitride, thereby enhancing the hydration resistance; performing protonation pretreatment on polyimide chopped fibers, performing pulping, putting a mixture of the polyimide short fiber pulp and chopped aramid fibers into a fiber fluffer, performing fluffing treatment, adding the aluminum nitride suspension, performing mixing, making base paper on a paper sheet former, and performing isothermal boosting hot pressing treatment to obtain the composite insulation paper. The aluminum nitride powder is subjected to heat treatment in an oxidizing atmosphere, so that a compact Al2O3 film is formed on the surface, thereby effectively preventing the hydrolysis reaction of the aluminum nitride; the aluminum nitride powder is mixed with the mixed fiber pulp, so that the small-size aluminum nitride powder is uniformly dispersed in the insulation paper, thereby filling up abundant gaps in the fiber paper structure; and interface traps are formed between the nanoparticles and fibers, thereby implementing effective binding on charges, and enhancing the breakdown strength of the insulation paper.
Owner:徐昌霞
Perfumed laser-jet paper
InactiveCN106192562AIncrease desire to buyEffective bondageDefoamers additionPaper coatingCross-linkHydrogen
The invention discloses perfumed laser-jet paper. The laser-jet paper comprises multiple layers, and comprises a varnish layer, a laser-jet layer, an aluminum-plated layer, a composite adhesive layer, a base paper layer and a back coating layer in sequence from exterior to interior, wherein a perfuming coating is added into one layer or several layers of the varnish layer, the laser-jet layer, the composite adhesive layer and the back coating layer. According to the perfumed laser-jet paper disclosed by the embodiment of the invention, on one hand, the one layer or the several layer in the structure of the laser-jet paper are subjected to perfuming treatment, the perfuming coating is added into the one layer or the several layer in the structure of the laser-jet paper, an attractive faint scent is emitted, and the purchase desire of a consumer is stimulated, and on the other hand, a modified polyvinyl alcohol high molecular polymer is added into the perfuming coating, besides that the modified polyvinyl alcohol high molecular polymer can form intermolecular hydrogen bonds with organic essence molecules containing hydroxyl groups in a natural plant essence, the self cross-linked structure of the modified polyvinyl alcohol high molecular polymer can more effectively restrain the essence molecules, and the effect of slowly releasing a perfume is achieved.
Owner:CHANGDE JINRUN NEW MATERIAL TECH CO LTD
Lithium sulfur-lithium ion hybrid battery, cathode material for lithium sulfur-lithium ion hybrid battery and preparation method thereof
InactiveCN109088043AIncrease capacityEffective bondageElectrode thermal treatmentImpregnation manufacturingLithium sulfurConductive materials
The invention discloses a lithium sulfur-lithium ion hybrid battery, a cathode material for the ithium sulfur-lithium ion hybrid battery and preparation method thereof. The organic dispersion containing conductive material, lithium source and metal source is subjected to solvothermal reaction, and the solvothermal reaction product is calcined and thermally melted with elemental sulfur to obtain acathode material with high capacity, good stability and good electrical conductivity. The charge-discharge cutoff voltage of Li-ion hybrid batteries meets the charge-discharge voltage requirements ofsulfur and lithium-ion cathode materials batteries. Compared with traditional lithium-sulfur batteries, the cycle stability is improved, and the capacity of batteries is greatly improved. In addition,the preparation method of the cathode material is simple, the process conditions are mild and the cost is low, which meets the requirements of industrial production.
Owner:CENT SOUTH UNIV
Radial fastening device of high-strength hot rolled strip steel coil
InactiveCN106697369AEasy to packEasy to transportBinding material applicationBundling machine detailsStrip steelEngineering
The invention relates to the field of hot rolled strip steel packaging, in particular to a radial fastening device of a high-strength hot rolled strip steel coil. The radial fastening device comprises a radial fastening strip. The radial fastening strip comprises a large horizontal plate, middle connection plates, small horizontal plates and bolt holes. The large horizontal plate, the middle connection plates and the small horizontal plates are formed by cold-bending hot rolled strip steel. The middle connection plates and the small horizontal plates are each symmetrically arranged on the two sides of the large horizontal plate in a bent mode. The multiple bolt holes are formed in the small horizontal plates. Through the design of the radial fastening strip, an auxiliary storage table and an automatic transport mechanism, the degree of automation is increased, efficiency is improved, excessive manual participation is avoided, labor is saved, and the problem of casualties in the operation process is avoided.
Owner:SHANDONG IRON & STEEL CO LTD
Telescopic luggage case with drying function
The invention relates to a luggage case, in particular to a telescopic luggage case with a drying function. The telescopic luggage case comprises a case cover, a case bottom, separating plates and telescopic links, wherein multiple separating plates are arranged, the case cover, the separating plates and the case bottom are sequentially arranged from top to bottom, and the case cover and the separating plate which are adjacent, the adjacent separating plates as well as the separating plate and the case bottom which are adjacent are connected by virtue of the telescopic links respectively; a first flange is arranged at the edge of the lower surface of the case cover, and a first wrapping fabric is arranged between the first flange and the adjacent separating plate; a second flange is arranged at the edge of the upper surface of the case bottom, and a second wrapping fabric is arranged between the second flange and the adjacent separating plate; and a third wrapping fabric is arranged between the adjacent separating plates. The luggage case provided by the invention has the advantages that articles can be classified and placed, the luggage case can be conveniently used by people, and the luggage case also has a volume-adjustable driving function, so that the people can carry fragile objects conveniently.
Owner:新沂市雅泽智造科技有限公司
Skin wound closing device
ActiveCN104856733AGuaranteed healing effectEffective absorptionSurgeryAbsorbent padsBiomedical engineeringMedical treatment
The invention relates to a medical instrument applied to a skin wound suture, in particular to a skin wound closing device. The skin wound closing device mainly comprises a left base band and a right base band which are arranged along the two sides of a skin wound respectively, a plurality of fastening bands are connected between the left base band and the right base band, the fastening bands are different in height, and a dressing body used for healing the skin wound and preventing infection of the skin wound is arranged below the fastening bands. By means of the structure, in dressing changing, only part of the fastening belts small in height are opened, the dressing body is made to penetrate from the part below the fastening bands, the other part of the fastening bands large in height are still maintained in the buckling state, the skin on the two sides of the skin wound is locked, the skin wound healing effect is maintained, after dressing changing, the low fastening bands can effectively bond the dressing body so that the dressing body can make full contact with the skin wound, and the using effect of medicine is improved; furthermore, the dressing body can effectively absorb tissue liquid seeping out of the skin wound, and a dry recovery environment is provided for skin wound healing.
Owner:李大为
Composite material based on self-supporting reduced graphene oxide coil, and preparation method thereof
ActiveCN108336310AAvoid stackingIncrease the mass ratio of active substancesHybrid capacitor electrodesCell electrodesFreeze-dryingLithium–sulfur battery
The invention provides a composite material based on a self-supporting reduced graphene oxide coil, and a preparation method thereof, and belongs to the field of researches on nanometer materials. Thepreparation method comprises: preparing a mixed solution from an additive and graphene oxide, freezing the mixed solution by using liquid nitrogen, further drying in a freeze drying device, treatingat a different temperatures to obtain a partially or completely reduced self-supporting graphene oxide coil network structure material, and combining with a predetermined material to produce the composite material. According to the present invention, the stacking of graphene can be avoided through the structure of the composite material; the large specific surface area of graphene is used, the connection between the coils is good, and a certain flexibility is achieved; and when the composite material is sulfur and is used as the lithium-sulfur battery positive electrode, the use of the bindercan be avoided by using the self-supporting structure of the partially or completely reduced graphene oxide coil network structure material, the specific capacity of the electrode can be increased, and the Coulomb efficiency and the cycle stability of the battery can be easily improved through the extremely large specific surface area of the graphene coil and the oxygen-containing functional groupon the surface.
Owner:INST OF PHYSICS - CHINESE ACAD OF SCI
Amorphous magnesium-Nickel series hydron-storage electrode material and producing method thereof
InactiveCN1741306AImprove production efficiencyImprove electrochemical cycle stabilityCell electrodesChemical compositionSulfur
A hydrogen storage electrode alloy of amorphous magnesium ¿C nickel series is prepared from chemical compositions of MgNiBaAb + X wt.% ( CFn ) here A ¿C one or above one element of Si , S ,C ,P ,AI , Ge, Se or I ; CFN ¿C fluorographite ; 0.01 íœ a íœ 0.5 ; 0 íœ b íœ 0.4 ; x ¿C wt.% content relative to MgNiBaAb ; and 0.01 íœ x íœ 5.5 .
Owner:BAOTOU RES INST OF RARE EARTHS
Preparation method and application of high-stability zinc-iodine battery and electrode material
ActiveCN113036145ALow densitySmall specific surface areaPositive electrodesZinc-halogen accumulatorsElectrical batteryTube furnace
The invention relates to a preparation method and application of a high-stability zinc-iodine battery and an electrode material. The electrode material comprises a covalent organic framework compound and active iodine, wherein the active iodine is loaded in a pore structure formed by the covalent organic framework compound. The preparation method comprises the steps of mixing the covalent organic framework compound with active iodine, and carrying out heating treatment in a tubular furnace to obtain the composite material. The iodine positive electrode is effectively stabilized, and the electrochemical performance of the zinc-iodine battery is improved. The material has good electrochemical performance, and has the characteristics of good capacity and Coulombic efficiency retention in the cycle process.
Owner:SHANDONG UNIV
Ultraviolet LED chip and manufacturing method thereof
The invention provides an ultraviolet LED chip and a manufacturing method thereof. A thin AlxInyGa1-x-yN insertion layer is inserted between the well barriers, and the lattice constant of the AlxInyGa1-x-yN insertion layer is between InGaN and AlGaN, so that lattice mismatch between the well barriers is reduced, the crystal quality of a well barrier interface is improved, the intensity of a polarization electric field is weakened, and the improvement of the power of an ultraviolet LED chip is facilitated. The Al component and the In component are subjected to doping gradient optimization, so that more effective electron constraint and more uniform hole injection are realized, carriers are distributed in the whole multi-quantum well structure region in a more balanced manner, and the ultraviolet LED chip with high luminous efficiency is realized. The AlxInyGa1-x-yN insertion layer is generated by adopting a pulse source passing method, and Al and In atoms have enough time to migrate onthe surface, so that two-dimensional layered growth is facilitated, meanwhile, material components can be more finely controlled, and the crystal quality of the AlxInyGa1-x-yN insertion layer can be further improved.
Owner:XIAMEN CHANGELIGHT CO LTD
Electric core, electrochemical device and manufacturing method thereof
ActiveCN109860713AAvoid short circuitPrevent shrinkageFinal product manufactureWound/folded electrode electrodesElectricityPole piece
The invention provides an electric core, which comprises a negative pole piece, a positive pole piece, a diaphragm, an end part and an adhesive film, wherein the diaphragm is arranged between the negative pole piece and the positive pole piece; the diaphragm has an extension part exceeding the negative pole piece and the positive pole piece at the end part; and the adhesive film has a main body adhered to the end part and a connecting part extending from the main body, and the connecting part is adhered with the extension part. The invention aims to provide an electric core which can effectively eliminate the short circuit failure caused by diaphragm shrinkage. The invention further provides an electrochemical device and a method of manufacturing the electrochemical device.
Owner:NINGDE AMPEREX TECH
Low-dark-current image sensor pixel structure
The invention discloses a low-dark-current image sensor pixel structure. The low-dark-current image sensor pixel structure comprises a photosensitive diode, a negative charge fixing dielectric layer,a suspension drain region, a transmission tube grid and a side wall of the transmission tube grid which are arranged in a semiconductor substrate. The negative charge fixing layer is composed of an oxide layer with a high dielectric constant (k), the oxide layer with a high k value can be made of Al2O3, HfO2, Ta02 and other materials, and the oxide layer with the high k value is deposited on the surface of PD silicon and the surface of silicon below a transmission grid of the PD silicon and makes direct contact with the surface of the silicon to form a Si-O interface. The oxide layer with thehigh k value generates interface energy for constraining electrons on the Si-O interface, and the interface energy effectively constrains the surface of the photodiode and electrons generated by unsaturated dangling bonds of a transmission tube channel and defects so that a dark current is effectively reduced.
Owner:WILL SEMICON (SHANGHAI) CO LTD
Amorphous rear-earth-magnesium-Nickel series hydrogen storage electrode material and producing method thereof
InactiveCN1741307AImprove efficiencyHigh initial electrochemical capacityCell electrodesRare earthMaterials science
A hydrogen storage electrode material of amorphous rare earth ¿C magnesium ¿C nickel series is prepared from chemical compositions of MI2 Mg17 BaAb + X wt..% Ni where A ¿C one or above one element of CFn , Si , S , C , P , AI , Ge , Se or I ; 0.01 íœ a íœ 3..o ; o íœ b íœ 2.5 ; X ¿C wt.. % content relative to MI2 Mg17 ; and 150 íœ x íœ 250 .
Owner:内蒙古希苑稀土功能材料工程技术研究中心 +1
Preparation method and application of high-sulfur content carbon and sulfur lithium ion battery material
ActiveCN104617295AReduce Shuttle EffectImprove cycle stabilityCell electrodesSecondary cellsHexachlorobutadieneElectrical battery
The invention discloses a preparation method and application of a high-sulfur content carbon and sulfur lithium ion battery material. The method comprises the following steps: adding elemental sulfur into a reaction vessel, injecting hexachlorobutadiene to perform closed reaction under the conditions that the temperature is 100-300 DEG C, and the pressure is 0-15 MPa, centrifuging after post-treatment, precipitating and washing, and drying to obtain a primary product; performing heat treatment in a tube furnace for 30 minutes-4 hours under the inert gas protection. The invention provides the application of a novel high-sulfur content carbon and sulfur material to a lithium ion battery. The method is extremely simple, the raw material source is rich, carbon atoms and sulfur atoms of the prepared novel high-sulfur content carbon and sulfur material are combined in a way of a chemical bond, and the mass percentage occupied by the content of sulfur elements in the material can reach 10-80 percent. The carbon and the sulfur atoms are mutually combined through the chemical bond, the sulfur atoms are uniformly dispersed in the material so as to be in full contact and react with lithium ions in the charging and discharging processes, therefore the specific capacity and the cycling performance of the lithium ion battery are greatly improved.
Owner:NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
Method for producing cordycepin with self-assembly silicon plastid electrostatic spinning fibrous membrane immobilized cells
ActiveCN107686836AGuaranteed stabilityEffective bondageFungiMicroorganism based processesChemistryChromatography column
The invention discloses a method for producing cordycepin with self-assembly silicon plastid electrostatic spinning fibrous membrane immobilized cells. The method comprises the following steps that Chinese caterpillar fungus protoplasts are wrapped into a stable silicon plastid formed by organic-inorganic hybrid lipids by utilizing a electrostatic self-assembly method; chitosan, polyvinyl alcoholand polyethylene oxide are completely dissolved into an acetic acid solution, glycerol is added, then silicon plastid is added, a nanometer fibrous membrane is prepared with electrostatic spinning, the nanometer fibrous membrane is rolled, and the rolled nanometer fibrous membrane is charged in a chromatography column; a mixed solution of glucose, ribose, potassium dihydrogen phosphate, magnesiumsulfate, yeast powder and adenine is prepared, filtering and bacteria removal are carried out on the mixed solution, the mixed solution flows through the chromatography column at a certain flow rate,gas is introduced at the lower part of the chromatography column at the same time, and through detection, an effluent contains the cordycepin. The method with the immobilized cells has the characteristics of high efficiency, bacterium contamination resistance, high yield and high concentration of a product and is beneficial to separation and purification of a subsequent product.
Owner:芽米科技(广州)有限公司
Direct injection molding polylactic acid/polypropylene chemical micro-foaming composite material and a preparation method thereof
The invention provides a direct injection molding polylactic acid / polypropylene chemical micro-foaming composite material and a preparation method thereof. The preparation method is characterized in that a PLA / PP composite material and a chemical foaming agent are mixed uniformly according to a suitable ratio, and the resulting mixture is subjected to micro-foaming molding in an injection moldingmachine, so that the direct injection molding polylactic acid / polypropylene chemical micro-foaming composite material is prepared, wherein the PLA / PP composite material is prepared from the followingcomponents in parts by weight: 15-25 parts of HMSPP, 10-20 parts of functionalized PP, 47-67 parts of modified PLA, 3-8 parts of modified inorganic nucleating agent, 0.2-0.4 part of antioxidant, 0.5-1part of lubricant, and 0-2 parts of other additives. The prepared PLA / PP composite material has high melt strength and excellent mechanical properties; an injection micro-foaming molding process canbe directly adopted to obtain a product with fine and uniform cell pores and an average diameter less than 79 [mu]m; and the molding process is simple, and product design degree of freedom is high, therefore, industrialized application is facilitated, and high-volume production of the product can be achieved.
Owner:ORINKO NEW MATERIAL CO LTD
Large-mode-field triple-clad optical fiber, preparation method thereof and optical fiber laser
ActiveCN112068243ATake advantage ofIncrease concentrationGlass optical fibreOptical fibre with multilayer core/claddingAluminium chlorideHigh concentration
The invention discloses a large-mode-field triple-clad optical fiber, a preparation method thereof and an optical fiber laser. The large-mode-field triple-clad optical fiber comprises a fiber core, afirst cladding wrapping the fiber core and a second cladding wrapping the first cladding. The fiber core is porous glass sintered after being doped with a co-dopant, and the co-dopant is a mixture ofytterbium ions and at least one of aluminum chloride, ammonium dihydrogen phosphate and cerous nitrate; the first cladding is porous glass that is obtained by doping with at least one of germanium oxide and ammonium hexafluorosilicate and then performing sintering; and the second cladding is porous glass sintered after heavily doping ammonium hexafluorosilicate. Porous glass is adopted as a matrixmaterial, high-concentration and high-uniformity doping of rare earth ions and fluorides can be achieved by fully utilizing the characteristic that the porous glass has nanoscale pore channels whichare communicated with one another, and the refractive indexes of the first cladding and the second cladding are controlled by adjusting the concentration of doping ions; therefore, the laser is effectively bound in the fiber core, and the transmission efficiency and stability of the optical fiber are effectively improved.
Owner:创昇光电科技(苏州)有限公司
Method for preparing cordycepin by fermenting cordyceps militaris through calcium alginate freeze-dried network scaffold
ActiveCN110387393AContinuous operationEasy to operateMicroorganism based processesOn/in organic carrierFood additiveSpore
The invention discloses a method for preparing cordycepin by fermenting cordyceps militaris through a calcium alginate freeze-dried network scaffold, and belongs to the field of biochemical engineering and food additives. The preparation method provided by the invention comprises the steps: (1) after cordyceps militaris spores are treated and activated through a plasma treater, a sodium alginate solution is added, even stirring is conducted, and the mixture is freeze-dried into a 3d scaffold; (2) the 3d scaffold is soaked through a calcium chloride solution, negative-pressure flash explosion is conducted, then vacuum drying is conducted, and the cordyceps militaris fermented network scaffold is prepared; and (3) columns are mounted on the cordyceps militaris fermented network scaffold andsoaked through a transformation original solution, and a cordycepin transformation solution is collected. The preparation method of the cordycepin is high in transformation efficiency, the preparationprocess can be continuously conducted, and industrialization promotion is facilitated.
Owner:广州大鱼创福科技有限公司
Fixing device used for fixing rat testis for injection
The invention discloses a fixing device used for fixing the rat testis for injection. The fixing device comprises a positioning tube, wherein one end of the positioning tube is cone-shaped, a bearingtable is arranged at the other end of the positioning tube, a binding part is arranged in the positioning tube, a sliding groove is formed in the bearing table, a propping seat is arranged in the sliding groove, a propping cam is rotationally arranged on the propping seat, a hole seat is arranged on the bearing table, a U-shaped elastic binding arm is arranged on the hole seat in a swinging manner, two free ends of the elastic binding arm are bent to form inserting pins which are inserted into the hole seat, a first positioning groove, a first converging bulge, a second positioning groove, a second converging bulge and a third positioning groove are sequentially formed in the matched surface, attached to the outer wall of the hole seat, of the elastic binding arm, and the second positioning groove is deeper than the first positioning groove and the third positioning groove. The fixing device is simple in overall structure and can fix the rate testis, thereby facilitating cell transplantation tests.
Owner:THE SECOND HOSPITAL AFFILIATED TO WENZHOU MEDICAL COLLEGE
Three-dimensional spacer structure electrothermal composite material and preparation method thereof
The invention discloses a three-dimensional spacer fabric structure electrothermal composite material and a preparation method thereof. The composite material comprises an electrothermal layer and a supporting layer, and the electrothermal layer and the supporting layer are bound as a whole by spacer yarns, so that a hollow heat insulation layer is formed between the electrothermal layer and the supporting layer, the electrothermal layer is composed of electrothermal layer warps and electrothermal layer wefts, and the supporting layer is composed of supporting layer warps and supporting layerwefts. The preparation method comprises the steps that each layer of the warps and spacer yarns are arranged according to a yarn selection scheme; each layer of the warps is synchronously introduced;all the layers of warps are interwoven with one another: spacer sheets are inserted between the electrothermal layer and the supporting layer, and the spacer yarns are interwoven with one another to weave each layer of the yarns as a whole; taking up of a stepping motor is conducted; the material is taken down from a machine after needed weaving circulations are completed. The material has the advantages of being simple in structure, light in weight, good in comprehensive structural performance, moisture resistant and aging resistant, impact resisting and the like, and the material is extensively applied in the domestic and military fields.
Owner:DONGHUA UNIV
Down locking fabric for down jackets
ActiveCN113601914AImprove toughnessPrevent water bulgingSynthetic resin layered productsClothingsFiberAnti bacteria
Owner:ANHUI GUIGU E COMMERCE
Lightweight thermal-insulation aerated building block and preparation method thereof
ActiveCN114573368AUniform distribution of poresUniform pore sizeSolid waste managementCeramicwareCompressive resistancePhysical chemistry
The invention relates to the field of building materials, and particularly discloses a lightweight thermal-insulation aerated building block and a preparation method thereof. The preparation method of the lightweight thermal-insulation aerated building block comprises the following steps: step 1) uniformly mixing water, a thickening agent and acetone to obtain an acetone solution; 2) adding cement, fly ash, lime and sand into an acetone solution, and uniformly mixing to obtain a mixed material; the method comprises the following steps of (1) preparing a mixture, (2) adding the mixture into a mold, (3) pouring the mixture into the mold to form a blank body, (4) heating and steam-curing the blank body for 120-130 minutes at the steam-curing temperature of 48-49 DEG C, (5) raising the steam-curing temperature to 54.5-55 DEG C and steam-curing for 80-85 minutes, (6) raising the steam-curing temperature to 60-61 DEG C and steam-curing for 5-6 hours, and (7) demolding to obtain the lightweight heat-insulating aerated building block.
Owner:韶关市顺展新型材料有限公司
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