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48results about How to "The experimental process is simple" patented technology
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Preparation method of silica shear thickening liquid
The invention discloses a preparation method of a silica shear thickening liquid. The preparation method comprises the following steps of: preparing monodisperse silica microspheres with certain grain size in an alcohol-water mixed liquid according to a multi-level seed growth method by utilizing tetraethoxysilane serves as a raw material and ammonia as a catalyst; after reaction is finished, adding shear thickening liquid dispersion media (polyethylene glycol, glycerol and the like) into a SiO2 suspension liquid; after mixing uniformly, removing ethanol, water and ammonia from the mixed liquid by adopting a heating and pressure-reducing method to finally prepare the silica shear thickening liquid, wherein the ethanol which is collected under reduced pressure can serve as a solvent and can be reused. In the preparation method, the SiO2 microspheres exist in the form of a uniformly dispersed suspension liquid from the synthesis link to the preparation link of the shear thickening liquid, so the agglomeration phenomenon of powder in drying and redispersion processes is avoided, and the stability and rheological property of the shear thickening liquid are improved.
Owner:浩华科技实业有限公司
Method for preparing collagen from deer sinew
InactiveCN101805775AThe experimental process is simpleEasy to operatePeptide preparation methodsFermentationSaline waterChemistry
The invention belongs to the technical field of collagen extraction and particularly relates to a method for preparing collagen from deer sinew by using the processes of extraction and purification through hydrochloric acid hydrolysis and trypsin enzymolysis. The method comprises the following steps: removing fat, skin and sinew membrane from the deer sinew; cutting the deer sinew into small pieces with the size being 0.5cm<3> to 1cm<3>; then, repeatedly washing the cut deer sinew with normal saline to remove sera and fat; further rinsing the washed deer sinew with distilled water; adding hydrochloric acid with the volume concentration thereof being 0.05% to 1.0% to the rinsed deer sinew by the solid-liquid ratio being 1g:5ml to 1g:15ml, and soaking the deer sinew in the hydrochloric acid for 12h to 60h; then, feeding the deer sinew in boiling water (100 DEG C) until the deer sinew is completely dissolved; centrifuging; neutralizing the supernatant with alkaline solution; adding trypsin for conducting the enzymolysis process with the ratio between the trypsin and the zymolyte being 1g:5,000g to 1g:50,000g; concentrating the supernatant and filtering with a 0.2mum-0.45mum filter membrane; and freeze-drying the filtrate in a vacuum to obtain the collagen powder. The method of the invention has the advantages of simple and easy-to-operate process and stable experimental result. Therefore, the method is suitable for large-scale industrialized production.
Owner:赵雨
Method for preparing CdS-Bi2S3 composite nanocrystalline by utilizing partial cation exchange reaction
InactiveCN101866960ALower requirementThe experimental process is simplePolycrystalline material growthNanostructure manufactureFlower likeCation exchange reaction
The invention relates to a method for preparing a CdS-Bi2S3 composite nanocrystalline by utilizing a partial cation exchange reaction, which is characterized by comprising: firstly, a flower-like SdS nanocrystalline is synthesized by a hydrothermal method; and then, the flower-like SdS nanocrystalline and a newly formed Bi2S3 nanocrystalline are combined by means of the partial cation exchange reaction so as to integrate the properties of Cds and Bi2S3 into the single composite nanocrystalline. The method has the advantages that in the process of synthesizing the composite nanocrystalline, nucleation and growth of the second phase material Bi2S3 can be avoided, thereby achieving effective composite of the CdS and the Bi2S3 in a nano-scale; and experimental operation is simple, the cost is cheap, and the requirement on experimental equipment is low. The method can be extended to the synthesis of other binary system nano composite materials.
Owner:SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
Method for etching SiC through metal/oxide double-layer mask structure
InactiveCN107275196AAvoid pollutionImprove pressure resistanceSemiconductor/solid-state device manufacturingPhotoresistBlocking layer
The invention provides a method for etching SiC through a metal / oxide double-layer mask structure, and the method at least comprises the steps: 1), providing an SiC epitaxial wafer, and growing an oxide mask layer on the surface of the SiC epitaxial wafer; 2), forming a photoresist layer on the surface of the oxide mask layer of a to-be-etched region of the SiC epitaxial wafer; 3), forming metal mask layers on the oxide mask layer and the surface of the photoresist layer; 4), removing the photoresist layer and the metal mask layer on the surface of the photoresist layer, and forming an etching window; 5), etching the oxide mask layer and the SiC epitaxial wafer to a needed depth through the etching window; 6), removing the residual metal mask layer and oxide mask layer, and obtaining an SiC gate groove structure. According to the invention, the oxide mask layer is taken as a blocking layer, thereby preventing the metal elements from diffusing towards the SiC epitaxial wafer and the substrate, and solving a problem of element pollution. In addition, the method can obtain a high-etching-rate gate and high-anisotropism groove structure with the smooth etching surface.
Owner:SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
Method for determining and testing ohmic contact between black silicon material and metal electrode
InactiveCN102565600ACalculate specific contact resistanceThe experimental process is simpleResistance/reactance/impedenceElectrical testingHeterojunctionDirect test
The invention discloses a method for determining and testing ohmic contact between a black silicon material and a metal electrode, belonging to the technical field of semiconductor photoelectronic materials and devices. The invention has the technical schemes that: an I-V characteristic curve of a metal / black silicon material can be directly tested through a three-electrode horizontal test device with a reverse bias voltage, and the contact type between the black silicon material and the metal electrode can be judged; and 2, the ohmic contact of the black silicon material can be tested by using a TLM (Transmission Line Model) method with the reverse bias voltage, thus a specific contact resistance can be obtained. According to the method disclosed by the invention, the influence on the determination and the test for the ohmic contact of the black silicon material due to heterojunction structures of black silicon / monocrystalline silicon in the traditional metal / black silicon / monocrystalline silicon sandwich structure is solved, and the specific contact resistance value of the metal / black silicon can be accurately tested.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Preparation method for nano multilayer nickelous hydroxide hollow tube
InactiveCN101284682AThe experimental process is simpleEasy to operateIndividual molecule manipulationNickel oxides/hydroxidesSolventNickel oxide hydroxide
The invention provides a wet chemical method for preparing a nanometer multilayer structured nickel hydroxide hollow tube, which is mainly characterized in that the method takes inorganic salt containing nickel as a nickel source, and glycol as a complexing agent to obtain the nanometer multilayer structured Alpha-Ni(OH)2 hollow tube in one step through thermal reaction of the solvent; during the preparation process, neither templates nor surface active agents are needed; the Alpha-Ni(OH)2 hollow tube which is 0.3Mum to 2.5Mum in diameter and the outer wall of which is composed of a large quantity of soft and 20nm to 50nm thick Alpha-Ni(OH)2 nano-plates can be obtained through the thermal reaction of the solvent at the temperature of 150 to 190 DEG C for 3 to 8 hours. The preparation method adopts the environment-friendly glycol as the complexing agent to prepare the Alpha-Ni(OH)2 hollow tube that has a large specific surface and a hollow internal structure and is expected to be widely applied in such fields as battery, ultracapacitor materials and environment-friendly automobiles. The method is characterized in simple equipment and process, low production cost, suitability for industrialized production, environment-friendliness, etc.
Owner:SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
Carbon/graphene composite super-capacitor electrode materials and preparation method thereof
InactiveCN108899213ARich sourcesEasy to passHybrid capacitor electrodesCapacitanceComposite electrode
Owner:BEIJING UNIV OF CHEM TECH
Phosphorylation method of casein protein
InactiveCN101182347AImprove functional propertiesDoes not affect digestibilityPeptide preparation methodsNutritive valuesPhosphorylation
The invention discloses a method of phosphorylating casein and aims at providing a method of phosphorylating casein that sodium tripolyphosphate is considered as phosphorylation reagent; reaction condition is gentle and can be controlled easily; the method ensures that the nutritive value and various aspects characters of modified casein are more fit for the food processing. The casein is dissolved in phosphate buffer and stirred under 40 DEG C till being dissolved completely for vacuum pump filtration to obtain casein solution; the pH value of the casein solution is adjusted between 7.0 to 9.0, 3 percent to 5 percent of sodium tripolyphosphate solution is added to be processed for the phosphorylation reaction under the constant temperature between 30 DEG C to 50 DEG C and then cooled to the room temperature; the pH value of the casein solution after the phosphorylation to the neutrality for dialysis, freezing and drying to obtain the phosphorylated casein. The method of phosphorylating casein of the invention adopts the sodium tripolyphosphate as the phosphorylation reagent, which not only ensures the food safety, improves the functional characteristic and nutritive characteristic of food protein, but the reaction condition is also gentle and can be controlled easily.
Owner:TIANJIN UNIV OF COMMERCE
Zr-MOFs/graphene oxide porous composite material as well as preparation method and application thereof
PendingCN110482487ADecrease in specific surface areaThe experimental process is simpleHydrogenCarbon compoundsPorous compositeGraphite oxide
The invention provides a Zr-MOFs / graphene oxide porous composite material. During Zr-MOFs preparation, two template agents with different functions are added at the same time, wherein the template agent A is graphene oxide and has a coordination effect with Zr-MOFs and a carrier function; the template agent B is a functional group with a coordination competition effect, and can remove organic matters by washing after inducing the Zr-MOFs hydrothermal reaction; and the template agent B is an organic matter containing carboxyl. The specific surface area of the composite material is 1326-1602 m<2> / g, and the pore size distribution is 0.2-1.2 nm. The preparation method of the Zr-MOFs / graphene oxide porous composite material comprises the following steps: 1) performing hydrothermal reaction synthesis of the Zr-MOFs / graphene oxide porous composite material; and (2) activating the Zr-MOFs / graphene oxide porous composite material. When the material is applied as a hydrogen storage material, the hydrogen adsorption capacity is 2.5-3.1 wt% under the condition that the adsorption temperature is 77K. The method has the advantages that the experimental process is simple; the hydrogen storage capacity is improved by 24%; the two template agents with different functions are introduced, and the defect degree and the micropore volume of the composite material are improved through competitive coordination.
Owner:GUILIN UNIV OF ELECTRONIC TECH
Oxidation-reduction preparation method for graphene
The invention discloses an oxidation-reduction preparation method for graphene. The oxidation-reduction preparation method comprises the following steps: soaking a certain amount of natural flake graphite powder into concentrated acid; transferring a vessel to a low-temperature environment, adding phosphoric acid, stirring, and then adding strong oxidant and controlling the temperature of a reaction system to be below 5 DEG C; transferring the vessel to a room-temperature environment and then stirring; heating and increasing the temperature, reacting for 6-12h while stirring, diluting by water, and then adding hydrogen peroxide and hydrochloric acid; performing ultrasonic treatment, thereby acquiring a graphene oxide acid solution; adding aluminum foil chippings of the lithium battery current collector into the graphene oxide acid solution, heating and starting the reduction reaction, stirring, removing impurities, and performing vacuum drying, thereby acquiring the graphene. According to the oxidation-reduction preparation method for graphene, the graphene is acquired after the graphene oxide acid solution is directly reduced by the aluminum foil chippings of the lithium battery current collector, so that the experiment technique is simplified, the experimental period is shortened, the impurity introduction is reduced, the adoption of the high-risk and environment-unfriendly raw materials is avoided, the safe and environment-friendly purposes are achieved, the waste of resources is avoided by recycling and reusing and the cost of laboratory is reduced.
Owner:HEFEI GUOXUAN HIGH TECH POWER ENERGY
Preparing method of lithium titanate cathode material for lithium ion battery
InactiveCN102903900AUniform shapeUniform crystallization and sinteringCell electrodesPhysical chemistryParticle-size distribution
The invention discloses a preparing method of a lithium titanate cathode material for a lithium ion battery. The preparing method includes that: a titanium dioxide precursor is prepared and subjected to a hydrothermal reaction; the titanium dioxide precursor is crystallized at high temperature; and the lithium titanate cathode material for the lithium ion battery is obtained. According to the lithium titanate cathode material for the lithium ion battery and prepared in the method, the phenomena of uneven product particle size distribution and product particle conglomeration are avoided. The preparing method simplifies the experimental process, leads practical size of titanium dioxide particles prepared in a hydrothermal method to be on the nanometer level, is favorable for controlling product shape, leads crystallization sintering to be even, and facilitates large-scale production.
Owner:IRICO
Polar sulfide-sulfur/porous carbon composite positive electrode material with three-dimensional structure and preparation method of positive electrode material
ActiveCN109411737AImprove structural stabilityImprove conductivityPositive electrodesLi-accumulatorsPorous carbonFreeze-drying
The invention discloses a polar sulfide-sulfur / porous carbon composite positive electrode material with a three-dimensional structure and a preparation method of the positive electrode material, and belongs to the technical field of preparation of lithium-sulfur batteries. The polar sulfide-sulfur / porous carbon composite positive electrode material is characterized in that the polar sulfide-sulfur / porous carbon composite positive electrode material with the three-dimensional structure is designed by taking porous carbon with high conductivity and physical absorption as a framework and combining a polar metal sulfide formed in situ with the strong chemical adsorption characteristic. The three-dimensional polar sulfide-sulfur / porous carbon composite positive electrode material is controllably prepared through low-temperature co-melting, uniform mixing, freeze-drying, in-situ carbonization and sulfuration and other steps, an assembled lithium-sulfur battery has stable electrochemical performance, the positive electrode material can be used for the lithium-sulfur battery and will also lay a foundation for the development and application of a novel high-performance lithium-sulfur battery positive electrode material.
Owner:CHINA UNIV OF GEOSCIENCES (BEIJING)
Method and kit for quickly extracting long-fragment genomic DNA with single reaction tube
PendingCN111378646ASimple and Precise ExtractionAvoid lostMicrobiological testing/measurementDNA preparationLysisGenomic DNA
Owner:BERRYGENOMICS CO LTD
Manganese pyrophosphate polyanionic lithium battery negative electrode material and preparation method thereof
PendingCN110217771AHigh purityImprove conductivityCell electrodesSecondary cellsOrganic solventCrystallinity
A manganese pyrophosphate polyanionic lithium battery negative electrode material is prepared as follows: a soluble divalent manganese salt and a compound containing pyrophosphate ion are uniformly dispersed in an aqueous organic solvent, a manganese divalent salt solution and a solution of a compound containing pyrophosphate ion are respectively formed, and that two solutions are mixed and stirred to carry out a hydrothermal reaction, and the obtained reaction product is filtered, washed and dried to obtain a polyanion negative electrode material manganese pyrophosphate. The negative electrode material of the manganese pyrophosphate polyanionic lithium battery prepared by the invention has the characteristics of single phase, good crystallinity, stable structure, good cycling performanceand the like. As a negative electrode material, it has a very high discharge specific capacity in the process of deep discharge, and can be widely used in lithium storage, new energy materials and other fields. The preparation method has the advantages of simple process, high product purity and low production cost.
Owner:CENT SOUTH UNIV
Bismuth telluride nanosheet film of spiral structure and preparing method of bismuth telluride nanosheet film
InactiveCN107058950AReduce pollutionThe experimental process is simpleVacuum evaporation coatingSputtering coatingVacuum pumpingCrucible
The invention discloses a bismuth telluride nanosheet film of a spiral structure and a preparing method of the bismuth telluride nanosheet film. The bismuth telluride nanosheet film is achieved through the following technology process that a certain amount of high-purity Bi2Te3 powder is added in a high vacuum heat evaporation coating machine crucible and placed in a heating area; a substrate sample table is adjusted to get away from an evaporation source by 10 cm, and cleaned fluorine crystal mica is placed on the substrate sample table; a composite molecular pump unit is started, vacuum pumping is conducted to 5*10<-5>Pa, a substrate is heated to 380 DEG C-400 DEG C, the evaporation source is heated, the temperature reaches 340 DEG C-360 DEG C through heating, and coating is started; and the reaction is conducted for 5-120 min at the temperature, a control panel is used for adjusting the temperature of the evaporation source and the substrate to 0 DEG C, and after an instrument is naturally cooled, a product is obtained. The bismuth telluride nanosheet film and the preparing method of the bismuth telluride nanosheet film have the beneficial effects that by means of the method, the bismuth telluride nanosheet film of the spiral structure can be directly prepared; the product appearance is in spiral growth, and steps are clear and visible; and other products are avoided, and pollution to the environment is weak.
Owner:XINJIANG UNIVERSITY
Trace shellfish DNA extraction method for high-throughput sequencing library preparation
ActiveCN110343742AImprove integrityReduce inhibitionMicrobiological testing/measurementClimate change adaptationLibrary preparationBiology
The invention discloses a trace shellfish DNA extraction method for high-throughput sequencing library preparation. Micro shellfish gill filament tissue is selected, only a cell lysis solution and protease K are needed for cell lysis, protein digestion and supernatant dilution, and obtained genome DNA can be directly used for preparing a high-throughput sequencing library. The tissue amount required by DNA extraction is as low as 5 mg, the operation is simple and rapid, and the method is particularly suitable for preparation of the high-throughput sequencing library of the micro tissue. The library prepared from the DNA sample is used for sequencing to obtain genotyping data, and the typing accuracy is up to 99.94%. The DNA extraction operation time is not longer than 30 minutes, and the extracted DNA is suitable for preparation of the high-throughput sequencing library of a large quantity of shellfish trace samples and subsequent whole genome typing analysis.
Owner:OCEAN UNIV OF CHINA
Three-dimensional reticular chitosan slow-release coating and preparation method thereof
The invention discloses a preparation method of a chitosan-methacrylic anhydride / calcium carbonate (CSMA / CaCO3) hydrogel slow-release coating. The surface of the coating is of a porous net structure. The preparation method comprises the following steps: (1) preparing a chitosan solution dissolved in dilute acetic acid; (2) adding methacrylic anhydride (MA) into the chitosan solution obtained in the step (1), and grafting methacrylic anhydride on chitosan through a hydrothermal method under a high-temperature condition to prepare chitosan-methacrylic anhydride (CSMA); (3) performing neutralizing, and dialyzing the chitosan-methacrylic anhydride obtained in step (2); (4) adding a photoinitiator I2959 and a calcium chloride solution into the solution obtained in the step (3), and performing ultraviolet irradiation crosslinking to obtain slow-release hydrogel; and 5) introducing ammonium carbonate into the hydrogel obtained in the step (4) to prepare the glycan-methacrylic anhydride / calcium carbonate hydrogel slow-release coating. The method is simple in preparation process, mild and controllable in condition, good in repeatability, low in production cost and suitable for industrial production. The prepared porous network hydrogel sustained-release coating has the advantages of good biocompatibility, easiness in degradation, high load rate and the like, and has wide application prospects in the fields of medicine and chemical industry.
Owner:ZHEJIANG SCI-TECH UNIV
High specific surface area vertical pore channel block-like carbon material used for supercapacitor electrode, and preparation method thereof
InactiveCN110240159AMaintain macrostructureSimple processCarbon compoundsHybrid capacitor electrodesCarbonizationSupercapacitor
The invention relates to a high specific surface area vertical pore channel block-like carbon material used for a supercapacitor electrode, and a preparation method thereof, wherein the specific surface area of the bulk-like carbon material can be substantially improved through alkali solution immersion and high temperature activation, the morphology can be maintained, and the obtained bulk-like carbon material has hydrophilicity and high electrical conductivity. According to the present invention, the method has advantages of simple process, time saving, safety and low cost, is suitable for large-scale industrial production, and breaks through the limitation in the only activation of the carbon powder in the prior art; and after the carbonization, the specific surface area is increased, the electric conductivity is good, and the original macro structure of the bulk-like material can be maintained.
Owner:BEIJING UNIV OF CHEM TECH
Toughening and reinforcing method for ceramic bonding agent for superhard grinding tool
InactiveCN109048693AThe experimental process is simpleSave energyAbrasion apparatusFiberCarbon fibers
The invention discloses a toughening and reinforcing method for a ceramic bonding agent, and belongs to the technical field of ceramic grinding tools. The toughening and reinforcing method comprises the main steps that the ceramic bonding agent is gradually added into a beaker containing deionized water, and a mixture is stirred with a glass rod to be sealed for standby application; carbon fibers,silicon carbide whiskers and graphene oxide are respectively added into the beaker containing the deionized water, after a surface active agent is added for dispersing, mixtures are mixed together, an antifoaming agent is added, and stirring with a magnetic stirrer is carried out; an antifoaming agent is dropped into mixed final mixed slurry and ceramic slurry, a binder is added after stirring with the magnetic stirrer, and a ceramic body is manufactured; and the ceramic body is naturally cooled to the room temperature after sintered in a muffle furnace. The toughening and reinforcing methodhas the beneficial effects that the experiment process is simple, and needed equipment is simple; the structure of the ceramic body prepared after uniform and dispersed slurry forming is more even; and after the carbon fiber-silicon carbide whisker-graphene oxide is added, whisker-shaped binding agent bridge joint structures are evenly distributed around ceramic binding agent particles, and toughening and reinforcing are carried out on the ceramic bonding agent.
Owner:HENAN UNIVERSITY OF TECHNOLOGY
Preparation method of cds-bi2s3 composite nanocrystals by partial cation exchange reaction
InactiveCN101866960BLower requirementThe experimental process is simplePolycrystalline material growthNanostructure manufactureFlower likeCation exchange reaction
The invention relates to a method for preparing CdS-Bi2S3 composite nanocrystals by utilizing partial cation exchange reactions. It is characterized in that the flower-like CdS nanocrystals are first synthesized by a hydrothermal method, and then the flower-like CdS nanocrystals are combined with the newly formed Bi2S3 nanocrystals through a partial cation exchange reaction, so that the properties of CdS and Bi2S3 can be integrated into a single composite nanocrystal. Crystal. The advantage of this method is that in the process of synthesizing composite nanocrystals, the independent nucleation and growth of the second phase material Bi2S3 can be avoided, thereby realizing the effective compounding of CdS and Bi2S3 on the nanoscale; the advantage of this method is that the experimental operation is simple, The cost is low, and the requirements for experimental equipment are low, and it can be extended to the synthesis of other binary system nanocomposites.
Owner:SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
Silanization organic phenol-nanometer silicon dioxide system as well as preparation method and application thereof
The invention relates to a silanization organic phenol-nanometer silicon dioxide system as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing 6 parts by weight of a silicon source and 40 parts by weight of an organic phenol substance into a four-neck bottle, maintaining stirring for half an hour under the conditions of 40 DEG C and 500 r / min, dropwise adding a mixed liquid of 8 parts by weight of an alkaline catalyst and 10 parts by weight of water for 2 hours by a constant-pressure funnel, adding 3 to 6 parts by weight of a silane coupling agent, and performing a reaction for 4 hours to obtain the silanization organic phenol-nanometer silicon dioxide system.
Owner:INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
Preparation method of micrometer grade spherical cobaltosic oxide material
The invention relates to a preparation method of a micrometer grade spherical cobaltosic oxide material. The preparation method comprises following steps: 1, a cobalt salt, polyethylene glycol (PEG),and an alcohol are dissolved in deionized water so as to obtain a uniform solution A; 2, the solution A is introduced into a reaction vessel for hydro-thermal reaction, and washing, drying, and roasting are carried out so as to obtain the micrometer grade spherical cobaltosic oxide material. The preparation method is simple in operation; the raw materials are easily available; product purity, thespherical degree, and the dispersion degree are high; and the preparation method is suitable for industrialized large scale production.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Preparation and application of fluorescence immunochromatography test strip for exosome quantification
The invention discloses preparation and application of a fluorescence immunochromatography test strip for exosome quantification, and particularly relates to the field of biological detection. The test strip comprises a back plate, a sample pad, a combination pad, an NC membrane and a water absorption pad, wherein the sample pad, the combination pad, the NC membrane and the water absorption pad are pasted on the back plate, the combination pad is in lap joint with one end of the sample pad and one end of the NC membrane, the other end of the NC membrane is in lap joint with the water absorption pad, and a detection line and a quality control line are sprayed on the NC membrane. A mouse anti-human CD9 antibody marked by fluorescent microspheres and rabbit IgG marked by fluorescent microspheres are attached to the combination pad, a mouse anti-human CD9 monoclonal antibody is coated on the detection line, and a goat anti-rabbit antibody is coated on the quality control line. By utilizing the optimized fluorescence immunochromatography technology, the concentration of the exosome can be measured more conveniently, quickly and accurately, and a new technical means is provided for the detection of the concentration of the exosome.
Owner:瑞太生物科技(沈阳)有限公司
Spiral TiO2/graphene composite fiber and preparation method and application thereof
ActiveCN110117839AThe experimental process is simpleLow costSubsonic/sonic/ultrasonic wave measurementArtificial filament heat treatmentFiberOxide composite
The invention discloses spiral TiO2 / graphene composite fiber and a preparation method and application thereof. The preparation method includes: providing a spinning solution containing uniformly dispersed nano-titanium dioxide and / or nano-hydrogenated titanium dioxide and graphene oxide; spinning the spinning solution to prepare spiral TiO2 / graphene oxide composite fiber through the wet spinning technology; subjecting the spiral TiO2 / graphene oxide composite fiber to reduction and then heating and setting to obtain the spiral TiO2 / graphene composite fiber. The invention further discloses a micro-vibration detection system and a relevant micro-vibration detection method. The deformation of the spiral TiO2 / graphene composite fiber is caused by vibration, which changes the effective light area of the composite fiber and causes the photocurrent change to carry out vibration detection; easy and simple preparation as well as low cost are achieved, and the micro-vibration detection system ishigh in flexibility and good in stability.
Owner:江西省纳米技术研究院
Method for preparing collagen from deer sinew
InactiveCN101805775BThe experimental process is simpleEasy to operatePeptide preparation methodsFermentationSaline waterFreeze-drying
The invention belongs to the technical field of collagen extraction and particularly relates to a method for preparing collagen from deer sinew by using the processes of extraction and purification through hydrochloric acid hydrolysis and trypsin enzymolysis. The method comprises the following steps: removing fat, skin and sinew membrane from the deer sinew; cutting the deer sinew into small pieces with the size being 0.5cm<3> to 1cm<3>; then, repeatedly washing the cut deer sinew with normal saline to remove sera and fat; further rinsing the washed deer sinew with distilled water; adding hydrochloric acid with the volume concentration thereof being 0.05% to 1.0% to the rinsed deer sinew by the solid-liquid ratio being 1g:5ml to 1g:15ml, and soaking the deer sinew in the hydrochloric acid for 12h to 60h; then, feeding the deer sinew in boiling water (100 DEG C) until the deer sinew is completely dissolved; centrifuging; neutralizing the supernatant with alkaline solution; adding trypsin for conducting the enzymolysis process with the ratio between the trypsin and the zymolyte being 1g:5,000g to 1g:50,000g; concentrating the supernatant and filtering with a 0.2mum-0.45mum filter membrane; and freeze-drying the filtrate in a vacuum to obtain the collagen powder. The method of the invention has the advantages of simple and easy-to-operate process and stable experimental result. Therefore, the method is suitable for large-scale industrialized production.
Owner:赵雨
Composite phase change temperature control material based on expanded graphite and non-woven fabric and preparation method of composite phase change temperature control material
PendingCN114806512AImprove performanceEvenly dispersedHeat-exchange elementsTemperature controlGraphite
The invention discloses a composite phase change temperature control material based on expanded graphite and non-woven fabric, which is prepared by taking n-octadecane, expanded graphite and non-woven fabric as raw materials through high-temperature modification, vacuum adsorption and a hot pressing method. The obtained material has the characteristics of flexibility, phase change heat storage and temperature control performance. Wherein n-octadecane is a phase change material and has the functions of phase change heat storage and temperature control; the expanded graphite is a framework and plays a heat conduction role; the non-woven fabric serves as a carrier and plays a supporting role. The material can be applied to the fields of heat conduction temperature control and heat storage, the heat storage density is 43.78-105.45 j / g, and the heat conductivity coefficient is 0.762-0.932 W / (m.K).
Owner:GUILIN UNIV OF ELECTRONIC TECH
spiral tio 2 /Graphene composite fiber, its preparation method and application
ActiveCN110117839BThe experimental process is simpleLow costSubsonic/sonic/ultrasonic wave measurementUsing electrical meansFiberSpinning
The invention discloses a helical TiO 2 / Graphene composite fiber, its preparation method and application. The preparation method includes: providing a spinning solution comprising uniformly dispersed nano-titanium dioxide and / or nano-hydrogenated titanium dioxide and graphene oxide; spinning the spinning solution into a helical TiO by wet spinning technology. 2 / graphene oxide composite fiber; the helical TiO 2 / Graphene oxide composite fiber reduction, then heating and setting to obtain helical TiO 2 / graphene composite fiber. The invention also discloses a micro-vibration detection system and a corresponding micro-vibration detection method. The present invention induces helical TiO by vibration 2 The deformation of the graphene / graphene composite fiber causes the effective illumination area of the composite fiber to change, resulting in a photocurrent change for vibration detection; and the preparation is simple and easy, the cost is low, and the micro-vibration detection system has high sensitivity and good stability.
Owner:江西省纳米技术研究院
A kind of natural environmental protection type modified casein glue and its preparation process
InactiveCN104531059BEasy to processHigh viscosityNon-macromolecular adhesive additivesProtein adhesivesSolubilityMonoglyceride
The invention discloses a natural environment-friendly modified casein glue and a preparation process thereof, aiming to provide a modified preparation using succinic anhydride as a raw material, starch and urea as auxiliary materials, and a trace amount of monoglyceride , calcium chloride, and sodium benzoate are natural environment-friendly modified casein glue prepared as auxiliary agents and a preparation method thereof; the modified preparation succinic anhydride used in the present invention has little side effects and remarkable modification effect, and succinylated casein carboxyl The content is significantly increased, and its solubility and other processing characteristics are significantly improved; acylated casein is used as raw material to prepare adhesives, avoiding the addition of chemical additives, significantly improving the environmental performance of casein adhesives, and satisfying people's health requirements for adhesives. Environmental protection requirements; the prepared casein adhesive has high viscosity and low stringiness, which can meet the industrial requirements for adhesive bonding; the preparation conditions of the modified casein adhesive are mild, the preparation process is simple, and the preparation process is easy to control. Industrialized production and promotion.
Owner:GANSU AGRI UNIV
A kind of three-dimensional network chitosan sustained-release coating and preparation method thereof
ActiveCN113209382BBacteriostaticGood biocompatibilityCoatingsProsthesisChemical industryUltraviolet lights
Owner:ZHEJIANG SCI-TECH UNIV
A method for amplifying cord blood nk in vitro
ActiveCN108676775BEasy to operateFew stepsCulture processBlood/immune system cellsCord blood stem cellA549 cell
A method for amplifying cord blood NK in vitro, which relates to a method for amplifying cord blood NK. The purpose of the present invention is to solve the problem that the existing cord blood NK amplification method is complicated and costly. Due to the introduction of animal source components, it is safe Due to the problems of low stability, long in vitro expansion time and low cell purity, the present invention promotes the proliferation of umbilical cord blood NK cells and enhances the activity of NK cells by adding a variety of cytokines. The invention is simple in operation, low in cost, does not introduce animal source components, and has high safety. The umbilical cord blood NK cells can be harvested after 15 days of culture in the present invention, and the cell purity is 95.33%, the total number of cells is 12 billion / part of umbilical cord blood, and the killing effect on lung cancer A549 cells is good.
Owner:天晴干细胞股份有限公司
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