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Ultraviolet-curing liquid-state optical cement
ActiveCN102965067AGood adhesionLaminating thickness is thinNon-macromolecular adhesive additivesPolyureas/polyurethane adhesivesPolyesterPolymer science
The invention discloses a ultraviolet-curing liquid-state optical cement. The ultraviolet-curing liquid-state optical cement includes the following components by weight percent: 50-75% of low polymer, 20-40% of activated monomer, 3-6% of free radical type photoinitiator and 2-4% of accessory ingredient, wherein the low polymer comprises one or more of organosilicone modification polybutadiene acrylate, urethane acrylate and polyester acrylate, and the activated monomer is one of mono-functional group, bi-functional group and poly-functional group. The ultraviolet-curing liquid-state optical cement can be applied to fixed bonding between touch screen protective glass and protective glass as well as between the touch screen protective glass and an LCD (Liquid Crystal Display) screen, can be adequately cured within an energy of 3000 mj / cm<2> under a room temperature, the whole-line light transmittance can reach 93% or more, the refractive index exceeds 1.50, the light transmittance of a touch screen can be greatly improved, and the rate of finished products is improved; the ultraviolet-curing liquid-state optical cement is more suitable for continuous production; the production efficiency is improved; and the ultraviolet-curing liquid-state optical cement is stable in performance and good in environmental protection property in a high-temperature and high-humidity environment.
Owner:SUZHOU BETELY POLYMER MATERIALS CO LTD
UV curable adhesive
ActiveCN101928541AHigh bonding strengthSuitable for continuous productionNon-macromolecular adhesive additivesPolyureas/polyurethane adhesivesPolyesterPhotochemistry
The invention discloses a sulfydryl / cyano acrylic ester UV curable adhesive composition, which comprises: 5 to 60 percent of sulfydryl compound which is selected from a sulfydryl alkyl acid ester and alkyl hydrosulfide; 5 to 60 percent of alpha-cyanoacrylate of a formula below; 0 to 60 percent of a prepolymer selected from polyester acrylate prepolymers, epoxy acrylate prepolymers and urethane acrylate prepolymers; 0 to 50 percent of active monomer which is selected from acrylic esters having a mono-functional group, double functional groups and multiple functional groups, allyl compounds and ethenyl compounds; 1 to 10 percent of photoinitiator; and 0 to 10 percent of assistant. The UV curable adhesive composition has a quick curing capability, high adhesive strength and low internal stress; and the obtained cured layer is flexible and can be widely to bond metal, metal oxides, plastics, rubber, glass, polyester and other substrate materials.
Owner:JIANGSU HECHENG ADVANCED MATERIALS
Corrosion-resistant hygroscopic coat and preparation method thereof
ActiveCN102166511AImprove bindingGood hygroscopicityOther chemical processesDispersed particle separationWater basedBinding force
The invention discloses a corrosion-resistant hygroscopic coat and a preparation method thereof. The coat comprises an upper layer and a lower layer, wherein the lower layer is a corrosion-resistant ground coat, and the upper layer is a hygroscopic surface coat. The preparation method of the coat comprises the steps of: (1) coating water-based corrosion-resistant ground paint A on a base material, and drying the paint A to form a corrosion-resistant ground coat with the thickness being 0.1-5.0g / m<2>; and (2) cooling the corrosion-resistant ground coat, coating water-based corrosion-resistant ground paint B on the corrosion-resistant base coat, and drying to form a hygroscopic surface coat with the thickness being 0.5-100g / m<2> so as to obtain a corrosion-resistant hygroscopic coat on the base material. The invention is simple in preparation process, suitable for continuous production, high in production efficiency, and environment-friendly, so that the good binding force is formed between the formed coats and the base material and among the coats, and obtained material is good in hygroscopicity, corrosion resistance and heat transfer, attractive in appearance, stable in performance, and suitable for the preparation of a rotating wheel of a dehumidifier.
Owner:GUANGZHOU HUMAN CHEM
Self-compacting concrete for CRTS III plate-type ballastless track filling layer and preparation method for self-compacting concrete
The present invention discloses a self-compacting concrete for CRTS III plate-type ballastless track filling layer. The concrete is prepared from the following raw materials in parts by weight: 270-350 parts of cement, 0-130 parts of coal fly ash, 0-120 parts of mineral powder, 20-50 parts of an expanding agent, 790-900 parts of fine aggregate, 750-900 parts of continuous gradation coarse aggregate, 20-40 parts specific viscosity modified materials, 5.5-8.5 parts of a specific sustained release controllable polycarboxylic acid water reducing agent and 165-180 parts of water. According to the invention, the specific viscosity modified materials and specific sustained release controllable polycarboxylic acid water reducing agent are used in combination to prepare the specific self-compacting concrete for filling layer with good flowability, strong volume stability, low sensitivity for water consumption, small thixotropic time change, low shrinkage and good longevity, thereby reducing theconstruction difficulty of the CRTS III plate-type filling layer and prolonging the sevice life of the ballastless track structure.
Owner:CHINA TIESIJU CIVIL ENG GRP CO LTD +1
Antistatic material, self-cleaning light diffusion plate prepared therefrom, and preparation method of self-cleaning light diffusion plate
ActiveCN103242593ARaw materials are easy to getReduce manufacturing costOptical elementsAntioxidantAntistatic Materials
The invention relates to an antistatic material, a self-cleaning light diffusion plate prepared therefrom, and a preparation method of the self-cleaning light diffusion plate. The antistatic material comprises a matrix resin, a light diffusing agent, an antistatic agent, an antioxidant, a light stabilizer and a dispersing agent; the antistatic material has the resistivity up to 107 to 1011 and is remarkable in antistatic performance; the light diffusion plate prepared from such an antistatic material has high light transmission performance and high antistatic self-cleaning performance, effectively improves the light transmission performance and has long-term stability; in addition, raw materials are easy to obtain, the preparation cost is low, and the light diffusion plate is suitable for being applied to related fields of products requiring antistatic prevention and improvement of self-cleaning performance. The preparation method of the self-cleaning light diffusion plate, provided by the invention, is optimal in process, simple in operation, suitable for continuous production and manufacturing, low in economic cost, and suitable for popularization and application.
Owner:BEIJING UNIV OF CHEM TECH
Preparation method for waterborne polyurethane synthetic leather Bass
ActiveCN102797165AGood breathability and moisture permeabilityFine foamTextiles and paperPolymer sciencePolypropylene
The invention discloses a preparation method for a waterborne polyurethane synthetic leather Bass. The method comprises the following steps of: adding a dispersing agent, a polypropylene powder and a talcum powder to waterborne polyurethane under a stirring condition; after sufficiently dispersing these materials, adding a thickening agent to these materials to stir the materials, so as to obtain a waterborne polyurethane synthetic leather paste; before coating, adding a foam stabilizer to the waterborne polyurethane synthetic leather paste under a stirring condition; bubbling the paste by using compressed air, wherein the bubbling speed is 0.2-0.8 m3 / h; and stirring and bubbling the paste for 5-10 minutes at a speed of 600-1000 rpm; and then coating a waterborne polyurethane synthetic leather foaming paste to a base fabric, which is treated by a base fabric treating liquid and ironed by an ironing roller, wherein the coating quantity is 300-600 g / m2; and finally, drying the waterborne polyurethane synthetic leather foaming paste, so as to obtain the waterborne polyurethane synthetic leather Bass. According to the invention, a foaming material has the advantages of rapidness in foaming and good foam stabilizing property; and the preparation method disclosed by the invention has the advantages of simplicity, easiness and easiness for continuous production and is very suitable for large-scale industrial production.
Owner:HEFEI KETIAN WATERBORNE TECH CO LTD
Double-sided asymmetrical-structure flat support membrane and preparation method and application thereof
ActiveCN104492284AHigh mechanical strengthUniform dense pore structureSemi-permeable membranesSolventStrong acids
Owner:DALIAN UNIV OF TECH
Liquid optical adhesive and preparation method thereof
InactiveCN103555210AIncrease productivityHigh bonding strengthOrganic non-macromolecular adhesivePolymer scienceAdhesive
The invention relates to a liquid optical adhesive which can be cured through ultraviolet light and is capable of achieving fixed adhesion between glass and touch control sensing screens in the process that a capacitance type touch screen is manufactured, and a preparation method of the liquid optical adhesive. The liquid optical adhesive is prepared from the following raw materials in percentage by weight: 35-48% of a resin oligomer, 50-63% of a reactive diluent, 0.5-1.3% of a photosensitizer, 0.8-1.6% of a photosensitive prompter and 0.4-1.4% of a cross-linking tackifier. The resin oligomer can be prepared by mixing and dissolving urethane acrylate or epoxy acrylate or a mixture of the two acrylic esters, by defoaming in vacuum and by filtering. The resin oligomer has the advantages of sufficient solidification in ultraviolet light, high production efficiency, high adhesion strength, high light permeability, small solidification shrinkage, yellowing resistance, simple manufacturing process, environmental friendliness and the like.
Owner:深圳市中显微电子有限公司 +1
Hollow fiber composite nano-filtration membrane and preparation method thereof
ActiveCN106345307ARetention performance impactEasy to operateSemi-permeable membranesFiberFiltration membrane
The invention discloses a preparation method of a hollow fiber composite nano-filtration membrane. The preparation method comprises: immersing an outer surface of a hollow fiber supporting membrane into a water solution A containing a polyphenol compound and a multi-amino compound; injecting a water solution B containing an oxidant into the hollow fiber supporting membrane; reacting at 0 to 95 DEG C for 1min to 300min and taking out the hollow fiber supporting membrane; draining a solution on the surface of the hollow fiber supporting membrane; carrying out drying treatment to obtain the hollow fiber composite nano-filtration membrane. The preparation method can be widely applied to preparation of hollow fiber composite nano-filtration membranes with different base membranes, and rejection performance of the prepared composite nano-filtration membrane is not influenced by base membrane structures; the preparation method is simple in operation process and moderate in reaction conditions, is suitable for continuous production, and has a good industrial production foundation and a wide application prospect.
Owner:ZHEJIANG UNIV
Beverage preparation method and sterilization filling device for implementing the method
The invention provides a preparation method for a bottled beverage prepared by concentrated liquid and drinking water; the method comprises that the main components and auxiliary components of the beverage are prepared to be the concentrated liquid, and then the concentrated liquid is sterilized singly while the drinking water is sterilized by ozone; at last the mixture is mixed and filled according to the ratio of the concentrated liquid and the drinking water under aseptic condition. The preparation method of the invention sterilizes the concentrated liquid and the drinking water separately; the drinking water uses a mature ozone sterilizing technique which can avoid the heat loss caused by heating and cooling, and can save energy greatly. The invention also provides sterilizing filling equipment that can realize the preparation method of the beverage; the filling equipment comprises a sterilizing device of the concentrated liquid, a sterilizing device of the drinking water and a mixed filling device; the sterilizing device of the drinking water is an ozone sterilizing device. The sterilizing filling equipment of the invention can carry out the continuous flow process from the sterilization to the filling, thus improving the production efficiency greatly.
Owner:王承辉
Method for preparing modified cellulose fire-retardant fiber through reaction extrusion
InactiveCN103147145ASimple processShort reaction timeArtificial filaments from cellulose solutionsFlame-proof filament manufactureFiberDissolution
The invention discloses a method for preparing a modified cellulose fire-retardant fiber through reaction extrusion, and the method comprises the following steps of: 1. preparing a fire retardant, cellulose, a solvent and an acid-binding agent into a mixture according to a certain mass ratio, wherein the fire retardant is a novel phosphorus-based fire retardant, the cellulose is one of wood pulp, cotton pulp or bamboo pulp, the solvent is ion liquid, the acid-binding agent is potassium carbonate, the proportion is as follows: the mass ratio of the acid-binding agent to the fire retardant is 0.1-0.5:1, the mass ratio of the fire retardant to the cellulose is 0.5-2:1, and the mass ratio of the cellulose to the solvent is 10-25:90-75; 2. feeding the mixture into a double-screw extruder, and synchronously carrying out dissolution, reaction and extrusion of the cellulose through a reaction extrusion method to obtain the freshly formed filament of modified cellulose; and 3. stretching, washing, thermoforming and curling the freshly formed filament to prepare the modified cellulose fire-retardant fiber. The modified cellulose fire-retardant fiber obtained through the method disclosed by the invention has the advantages of no halogen, environmental friendliness without pollution and outstanding flame-retardant effect.
Owner:TIANJIN POLYTECHNIC UNIV
High temperature proton exchange film fuel cell membrane electrode and its preparing method
InactiveCN1581546AGood water retention at high temperatureSuitable for continuous productionFinal product manufactureCell electrodesChemistryNanometre
Membrane electrode is composed of secondary unit and main unit possessing function of high temperature and molding moisture. Secondary unit is a gaseous diffusion layer, and the main unit is prepared by binding gaseous diffusion layer, catalyst layer, and inorganic Nano particles to proton exchange layer. The preparation method includes following steps: coating pulp of catalyst on gaseous diffusion layer to prepare catalyst layer; casting inorganic Nano particles and resin solution of proton exchange to prepare inorganic Nano particles layer and proton exchange layer; then coating pulp of catalyst again to prepare catalyst layer. Membrane electrode is obtained by cold contact between main unit and secondary unit, or hot pressing the two units. Features are: suitable to continuous production, controllable thickness of proton exchange layer, high binding intensity between layers, low contact resistance, operatable under high temperature.
Owner:WUHAN UNIV OF TECH
Method for manufacturing conductive pattern on flexible substrate and protective printing oil thereof
ActiveCN101594744ALow costSuitable for continuous productionInksConductive material chemical/electrolytical removalScreen printingLine width
The invention provides a method for manufacturing a conductive pattern on a flexible substrate and protective printing oil thereof. The method comprises the following steps: providing the flexible substrate with a conductive layer; exposing part of the conductive layer covered by the protective printing oil by screen printing; etching and removing the exposed part of the conductive layer by using the protective printing oil as a mask; and removing the protective printing oil and remaining the conductive layer not etched to form the conductive pattern with the minimum line width not less than 150 microns. The invention also provides the protective printing oil used in the technology.
Owner:IND TECH RES INST
Preparation of reactive metal based alloy
The invention discloses a method for preparing an active metal based alloy, which belongs to the field of non-ferrous metallurgy and comprises the following steps: adopting a molten salt electrolytic codeposition method; selecting an alloy using a relatively active metal as a matrix; using chloride and oxide of alloying elements as raw materials; electrolyzing the raw materials in an alkali metal molten salt system; and controlling the electrolysis temperature to be between 400 and 1,200 DEG C to melt the materials. A mode of adding the raw materials continuously is adopted so that the proportion of each alloying element of the added raw materials accords with that of the designed alloy components, and the faraday electric quantity of the added raw materials in corresponding time interval accords with the electrolysis electric quantity simultaneously. The alloy obtained through electrolyzing can be taken out at any time and is consistent with the design components. The process is simple, convenient and practicable, and is suitable for the development of continuous production.
Owner:UNIV OF SCI & TECH BEIJING
Dry garment leather base and preparation process thereof
InactiveCN106118034ASensualImprove tensile propertiesGrip property fibresProcess engineeringMaterials science
The invention provides a dry garment leather base and a preparation process thereof. The preparation process includes the steps: 1) base cloth treatment: completely soaking base cloth in mixed solution of soluble calcium salt and leather softeners, mangling the base cloth and then ironing and drying the base cloth by an ironing roller; 2) coating the base cloth with 200-500g / m<2> of garment leather base foaming slurry by a scraping method; 3) drying the base cloth in a drying oven; 4) base rolling: cooling and rolling the base cloth by a cooling roller to prepare the dry garment leather base. The prepared dry garment leather base has good moisture and air permeability, is quite soft in hand feeling and good in rebound resilience and wear resistance, and can meet higher performance requirements and environmental protection standards.
Owner:HEFEI KETIAN WATERBORNE TECH CO LTD
Method and apparatus for continuous production of flexible micro-nano metal network transparent conductive film
ActiveCN106244989AImprove uniformityImprove transmittanceVacuum evaporation coatingSputtering coatingEngineeringVacuum pump
The invention discloses a method and apparatus for continuous production of a flexible micro-nano metal network transparent conductive film. The method comprises the steps of: continuously conveying a flexible substrate to undergo pre-cleaning, air drying, atmospheric pressure plasma cleaning, cracking liquid coating and heating in order, thus forming a craquelure template on the flexible substrate; placing the flexible substrate in a vacuum chamber and performing vacuum pumping on the vacuum chamber; subjecting the flexible substrate to secondary plasma cleaning, then coating a compact metal film, and filling the craquelures on the craquelure template with a metal film material in the process so as to obtain a flexible micro-nano metal network transparent conductive film semi-finished product; releasing vacuum, taking out the semi-finished product from the vacuum chamber, and removing the craquelure template from the flexible substrate, thus obtaining the product. The method and apparatus provided by the invention realize continuous and large-area production of the flexible micro-nano metal network transparent conductive film. The film coating mode is suitable for industrial automatic continuous magnetron sputtering production lines, can greatly shorten the production cycle, and substantially improves the productivity.
Owner:SOUTH CHINA NORMAL UNIVERSITY +1
Ultraviolet curing adhesive for bonding silicon rubber with plastics
ActiveCN101962515AReduce consumptionImprove yieldNon-macromolecular adhesive additivesOrganic non-macromolecular adhesiveAdhesive cementHigh humidity
The invention discloses an ultraviolet curing adhesive, in particular an ultraviolet curing adhesive for bonding silicon rubber with plastics and in especial relates to an ultraviolet curing adhesive for bonding a silicon rubber substrate for mobile phone keys with plastic keycaps. The ultraviolet curing adhesive comprises the following raw materials in parts by weight of a low polymer, an activated monomer, a photoinitiator and an additive and has the characteristics of quick curing, convenient operation, high production efficiency and stable and reliable bonding property in high-temperature and high-humidity environment.
Owner:东莞市贝特利新材料有限公司
Preparation method of ultralight and high-strength GMT (glass mat reinforced thermoplastic) composite board
InactiveCN108068424AHigh strengthIncrease stiffnessSynthetic resin layered productsLaminationFiberThermoplastic
The invention discloses a preparation method of an ultralight and high-strength GMT composite board. According to the preparation method of the ultralight and high-strength GMT composite board, microballoon foaming agent is introduced into a blend fiber composite mat made of thermoplastic compound fiber and reinforcing fiber through a dusting process and then hot-pressed through continuous compounding equipment into the ultralight and high-strength GMT composite board for automobile interior and exterior trimming, in which the reinforcing fiber serves as a reinforcing body, the thermoplastic compound fiber serves as a bonding matrix, and the microballoon foaming agent serves as filling modifier; the microballoon foaming agent is uniformly dispersed inside the blend fiber composite mat through the dusting process, which is simple, flexible in operation, applicable to continuous production and meanwhile has the advantage of low cost, so that the manufacturing cost can be reduced, preparation of high-price foaming solution can be saved and small environmental pollution can be achieved.
Owner:浙江华江科技股份有限公司
Method for preparing 5-hydroxymethylfurfural by taking cellulose as raw material
ActiveCN101628901AEliminate contamination and corrosionHigh reaction conversion and selectivityOrganic chemistryBulk chemical productionChemistryPre treatment
The invention discloses a method for preparing 5-hydroxymethylfurfural by taking cellulose as a raw material, which comprises the steps of: pretreating a biomass material rich in the cellulose by utilizing acid or alkali, neutralizing the biomass material, filtering to remove hemicellulose and lignin, washing obtained cellulose filter residue with water, and drying the cellulose filter residue; mixing the cellulose filter residue or pure cellulose with the water, loading the mixture into a high-pressure reactor, sealing the high-pressure reactor, and injecting liquid carbon dioxide into the reactor for reaction; and separating supercritical carbon dioxide dissolved with the 5-hydroxymethylfurfural through a separator during the reaction, discharging the 5-hydroxymethylfurfural from the bottom of the separator, and obtaining a 5-hydroxymethylfurfural product through drying, dehydration and crystallization. The method has the advantages of high selectivity, suitable continuous production, high product content, green and environment-friendly process, and easy industrialized production.
Owner:SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
Rotary automatic PCB cleaning device
ActiveCN106111607AEfficient removalImprove water resource utilizationCleaning using liquidsConductive pattern polishing/cleaningElectric machineWater resources
The invention discloses a rotary automatic PCB cleaning device. The rotary automatic PCB cleaning device comprises a base, two stand columns, a top frame, a first servo motor, a lead screw, a feed nut, a sliding seat, two supporting rods, a support plate, triangular supporting plates, extension rods, water jet cutter mechanisms, a trough, a supporting seat, a second servo motor, a gear, a slewing bearing, a working table, a controller and more than two feeding mechanisms, wherein the two stand columns are arranged in parallel along the base; the two supporting rods are symmetrically arranged along the sliding seat; the triangular supporting plates are arranged symmetrically along the support plate; a PCB is placed in a slot and is fixed by manually tightening hand screws; the second servo motor drives the working table to rotate at a set angle; after an electric push rod pushes a U-shaped clamping frame to move forwards in place, the first servo motor drives the sliding seat to move towards the U-shaped clamping frame by a set distance, then high-pressure water is pumped into the water jet cutter mechanisms, and chippings on the surface of the PCB and in holes of the PCB are eliminated. The device is simple in structure, good in cleaning effect, high in water resource utilization rate, high in degree of automation and high in cleaning efficiency.
Owner:苏州市相城区姑苏线路板厂
Preparation method of cellulose acetate fiber
ActiveCN103014892AAvoid pollutionImprove production environmentArtificial filaments from cellulose derivativesMelt spinning methodsPolymer scienceCellulose acetate
The invention relates to a preparation method of cellulose acetate fiber, in particular relates to a method for preparing cellulose acetate fiber after the cellulose acetate fiber is plasticized and modified by taking ionic liquid as a plasticizer. The method comprises the following steps of (1) evenly mixing and extruding the cellulose acetate fiber and the ionic liquid; (2) conducting vacuum drying on spinning materials; (3) conducting melt spinning: spinning the spinning materials through a metering pump and a spin sprayed plate, stretching through a hot roll, extracting liquor and washing; and (4) conducting oiling, drying and winding procedures to obtain cellulose acetate fiber with fiber breakage strength of 2.2-6cN / dtex. By adopting the preparation method of cellulose acetate fiber, the problems that the fiber mechanical property is poor, the breakage strength is low, and due to seeping or volatilization of the plasticizer, high fragility of cellulose acetate fiber grafted copolymer and difficulty of processing in the process of plasticizing and melt spinning cellulose acetate fiber, the fiber fineness is larger and the strength is low, and the like in the dry spinning process of cellulose acetate fiber in the prior art can be solved.
Owner:DONGHUA UNIV
Reinforcement method of aluminosilicate glass
ActiveCN104556648AImprove wear resistanceImprove the strengthening effectGlass tempering apparatusLithium chlorideAlkali metal oxide
The invention relates to a reinforcement method of aluminosilicate glass, which comprises the following steps: preheating aluminosilicate glass to 500-600 DEG C, wherein the aluminosilicate glass contains silicon dioxide, aluminum oxide and alkali oxide, and the alkali oxide is selected from at least one of sodium oxide and potassium oxide; coating a reinforcement treating agent on the surface of the aluminosilicate glass, wherein the reinforcement treating agent contains molten salts, the molten salts comprise 70-100% of lithium salt and 0-30% of sodium salts, the lithium salt is a mixture of at least one of lithium nitrate and lithium sulfate with lithium chloride or lithium chloride, and the sodium salt is selected from at least one of sodium chloride, sodium nitrate and sodium sulfate; and carrying out ion exchange on the reinforcement treating agent and aluminosilicate glass at 650-825 DEG C for 3-15 minutes to form a crystallized layer. The reinforcement method of aluminosilicate glass can enhance the strength of the reinforced glass, and has the advantage of short time consumption.
Owner:CSG HOLDING
Preparation process of antimony doped stannum oxide nano-crystal
InactiveCN101037224ASmooth responseSmall particle sizeNanostructure manufactureTin oxidesEnergy conservationTin
The present invention discloses a preparation method of tin oxide (ATO)nanometer crystal with antimon doping , which belongs to the technical field of preparing inorganic material. The preparation method comprises the steps of that: a sticky and paste form tin-antimon mixed solution is obtained by adding multilevel composite fuel into the tin-antimon mixed solution which is prepared by adding tin salt solution into the antimonic salt solution obtained by mixing antimonic salt with coordination agent; the paste form tin-antimon mixed solution is injected into a combustion furnace when the temperature of the furnace is up to 600~900 DEG C, and after the combustion process is finished, the combustion product is collected to obtain flocculent light blue ATO powder. In the present invention, the reaction is controlled by using the thermodynamic property and the kinetic property of each component of the multilevel composite fuel, and the combustion process is rapid and stable; the obtained product has a small grain size, a narrow distribution, a uniform doping and a high purity; the reaction process has no waste water and exhaust emission, saves energy and is adapted to continuous production.
Owner:SUZHOU UNIV
Chemical bath deposition method of cadmium sulfide film and device thereof
ActiveCN103320774AGuaranteed uniformityGuaranteed compactnessFinal product manufactureLiquid/solution decomposition chemical coatingWater bathsUltrasonic assisted
The invention discloses a chemical bath deposition method of a cadmium sulfide film and a device thereof. The method comprises the following steps: (1) cleaning a substrate and blow-drying; (2) installing the substrate; (3) preheating the substrate; (4) preparing a solution; (5) reacting and depositing; and (6) carrying out subsequent processing: washing the coated substrate by the use of deionized water and blow-drying or drying. The device comprises a reaction vessel and a thermotank. A diffuse spray groove, a substrate, a special fixture and a transmission unit are all placed inside the thermotank. A reaction solution flows through a heater and is then injected into the diffuse spray groove. The transmission unit is arranged at the bottom of the special fixture and the substrate. According to the invention, a thermostatic waterbath device, a stirring device and ultrasonic-assisted deposition are not adopted; the method provided by the invention is suitable for continuous production; production efficiency is raised; only one side of the substrate is coated, and aesthetic degree after the substrate is coated is improved; the deposited cadmium sulfide film is uniform and compact; film formation quality is high; and thin-film solar cell buffer layer requirements are met.
Owner:BEIJING SIFANG JIBAO AUTOMATION
Silicate long-persistence luminescent material and preparation method thereof
InactiveCN106497555ANo emissionsImprove efficiencyLuminescent compositionsRoom temperatureGreen-light
The invention provides a silicate long-persistence luminescent material and a preparation method thereof. The chemical expression of the luminescent material is Ba1-x-y-ZrSi3O9: Eux, Ry or Ba1-x-yHfSi3O9: Eux, Ry, wherein x is more than 0 and smaller than or equal to 0.05 and y is more than 0 and smaller than or equal to 0.05. The preparation method comprises the following steps of: weighing raw materials according to a stoichiometric ratio of all chemical components in the chemical expression of the long-persistence luminescent material; mixing and uniformly grinding all the raw materials to obtain raw material powder; after pre-sintering the raw material powder, calcining at a high temperature; cooling to a room temperature along a furnace to obtain a calcined product; and grinding to prepare the green long-persistence luminescent material. The luminescent material provided by the invention can emit bright green light, not only has excellent performances of an existing silicate long-persistence luminescent material, but also has persistence time equivalent with an aluminate long-persistence luminescent material; the preparation method is simple, has low pollution and has relatively low cost.
Owner:LANZHOU UNIVERSITY
Method for preprocessing Asiatic wormwood to preserve color in combination with quick-freezing and unfreezing for keeping quality
InactiveCN102422875AInhibits polyphenol oxidase activityInhibit endogenous enzyme activityFruits/vegetable preservation by heatingFruits/vegetable preservation by freezing/coolingEnzyme inhibitorIon
The method for preprocessing Asiatic wormwood to preserve the color in combination with quick-freezing and unfreezing for keeping quality belongs to the technical field of fruit-vegetable food storage and processing. The process of the method is as follows: Asiatic wormwood with tender leaves and stalks is chosen, washed and then added with compound enzyme inhibitor, and by regulating the components, content and material-to-solution ratio of the enzyme inhibitor, the activity of polyphenol oxidase in the Asiatic wormwood is inhibited; the Asiatic wormwood is then blanched in boiled water, thepH value of the solution is regulated, the blanching time is adjusted, and while substances with bed flavor, such as absinthin, are completely removed, the loss of the Asiatic wormwood pigment is reduced; after cooling, metal ion color-preserving processing is carried out, and the dosage of metal ions and the pH value of color preservative are determined; after being sufficiently blanched, the Asiatic wormwood is pulped and filtered, vacuum packages are adopted for precooling and medium-frequency ultrasonic quick-freezing, and the Asiatic wormwood is refrigerated under the condition of negative 18 DEG C, and is ultrasonically unfrozen when being applied later. High-quality Asiatic wormwood product is produced by the method, the method is economic and practical, the cost investment is low,the process is simple and easy to implement, and the method can provide technical support for the industrialized production of Asiatic wormwood.
Owner:JIANGNAN UNIV +1
Preparation method of PbSxSe1-x ternary nanocrystal
InactiveCN102633239ASimple methodEasy to operateSelenium/tellurium compundsEnergy inputEthyl ChlorideEthanol
The invention discloses a preparation method of PbSxSe1-x ternary nanocrystal. The method disclosed by the invention comprises the following steps of: mixing selenium powder and sulfur powder according to a certain proportion, slowly adding alkylamine which has long chain and has boiling point more than 180 DEG C, sufficiently stirring, heating (the selenium powder and the sulfur powder) amine mixed liquor into 180-260 DEG C, forming into settled solution at constant temperature, and adding the alkylamine which is dissolved with lead chloride and has the long chain and the boiling point more than 180 DEG C, so that a system is naturally cooled into room temperature after being sufficiently reacted, adding 10mL of chloroform into the system, and adding ethanol of which the volume is twice as high as the volume of the reaction solution into the reaction system, so that PbSxSe1-x ternary nanocrystal particle precipitate is separated out, therefore, the PbSxSe1-x ternary nanocrystal particle can be obtained.
Owner:LANZHOU UNIVERSITY
Preparation method of benzaldehyde and its derivatives
InactiveCN106748688ALow priceWide variety of sourcesOrganic compound preparationCarbonyl compound preparationBenzaldehydeMetal catalyst
The invention provides a preparation method of benzaldehyde and its derivatives. The preparation method comprises adding a catalyst and toluene or toluene homolog into a reaction system in the presence of an oxidizing agent, and carrying out a one-step reaction process to produce benzaldehyde or its derivatives, wherein the catalyst comprises a metal catalyst, an auxiliary catalyst I and an auxiliary catalyst II, the metal catalyst is a transition metal catalyst, the auxiliary catalyst I is a basic nitrogen-containing ligand, and the auxiliary catalyst II is a basic compound. The preparation method can prepare benzaldehyde and its derivatives through one-step direct oxidation of toluene, utilizes cheap raw materials having wide sources, has a fast reaction speed and high production intensity, is suitable for automatic and continuous production, does not use chlorine, is suitable for industrial production and has a good application prospect.
Owner:SUZHOU RES INST LANZHOU INST OF CHEM PHYSICS CHINESE ACADEMY OF SCI
Europium ion activated silicon-based nitrogen oxide green fluorescent powder and preparation method thereof
InactiveCN103834391APromote reductionProcess stabilityLuminescent compositionsAlkaline earth metalGreen-light
The invention belongs to the technical field of a rare-earth luminescent material, and relates to europium ion activated silicon-based nitrogen oxide green fluorescent powder and a preparation method thereof. The europium ion activated silicon-based nitrogen oxide green fluorescent powder comprises chemical ingredients as shown in the following chemical formula: M3(1-x)Si2O4N2:3xEu<2+>, wherein the M element is an alkaline-earth metal element such as Ca, Mg, Sr, Ba and the like, x is not smaller than 0.002 and not larger than 0.01, and the Eu<2+> is doped rare-earth ion. The preparation method disclosed by the invention is used for synthesizing the green fluorescent powder M3(1-x)Si2O4N2:3xEu<2+> through a high-temperature solid-phase synthesis method. The green fluorescent powder emits intensive green light under excitation of near ultraviolet light; the absorbency is quite high within an excitation wavelength range of 270nm-450nm; the main emission peak is at about 510nm, and the green fluorescent powder has high luminous efficiency, high intensity and good thermal stability and can be used in white light LED (Light Emitting Diode) with high color rendering property; the preparation method of the green fluorescent powder is simple, gentle in reaction condition, easy to operate, energy-saving and time-saving, and has extremely good application prospect in solid illumination field.
Owner:CHINA JILIANG UNIV
Method for preparing silicon dioxide aerogel
The invention provides a method for preparing silicon dioxide aerogel. The method comprises the following steps of: preparing silicon dioxide sol by solid-solid reaction, preparing silicon dioxide gel, replacing a solution, performing surface modification treatment and drying under normal pressure. According to the method, the silicon dioxide aerogel which is few in impurities, high in purity and narrow in particle size distribution is prepared by taking superfine mineral powder of silicon micro powder, micro silicon powder, kieselguhr, vermiculite powder, sepiolite, a perlite filter aid and the like which are high in content of silicon dioxide, readily available, low in cost and light in mass as a raw material; and according to the preparation method, the production cost is low, and a production process is simple.
Owner:中亨新型材料科技有限公司
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