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Silicon monoxide/silicon/lithium metasilicate composite negative electrode material and preparation method thereof
InactiveCN108269979AIncrease capacityImprove the first Coulombic efficiencyCell electrodesSilicon monoxideShielding gas
The invention discloses a silicon monoxide / silicon / lithium metasilicate composite negative electrode material. The silicon monoxide / silicon / lithium metasilicate composite negative electrode material comprises a silicon monoxide / silicon / lithium metasilicate composite material and an inorganic matter coating layer. The invention also provides a preparation method of the silicon monoxide / silicon / lithium metasilicate composite negative electrode material. The preparation method comprises the following steps: taking silicon monoxide and an inorganic compound of lithium element, mixing and ball-milling the silicon monoxide and the inorganic compound of the lithium element, sintering the obtained mixture in a protection gas environment, and naturally cooling the sintered mixture to obtain the silicon monoxide / silicon / lithium metasilicate composite material; and mixing and ball-milling the silicon monoxide / silicon / lithium metasilicate composite material and sintering the obtained mixture undera protection gas condition. The preparation method of the silicon monoxide / silicon / lithium metasilicate composite negative electrode material has the advantages of simplicity, safety, low cost, and easiness in operation and industrial production, and the obtained composite negative electrode material has the advantages of high reversible capacity, excellent cycle performances and high initial Coulomb efficiency.
Owner:HEFEI GUOXUAN HIGH TECH POWER ENERGY
Preparation method and application of polyphenol-protein/polypeptide-carbohydrate covalent complexes
ActiveCN105639651AImprove performanceGood physical and chemical stabilitySugar food ingredientsNatural extract food ingredientsMaillard reactionBeta-Carotene
The invention discloses a preparation method and application of polyphenol-protein / polypeptide-carbohydrate covalent complexes, and belongs to the technical field of food ingredients and food processing. The method comprises the steps that polyphenol, protein / polypeptide are used as raw materials, an alkaline method is used for inducing a reaction, and polyphenol-protein / polypeptide covalent complexes are prepared; then, a carbohydrate and the prepared polyphenol-protein / polypeptide covalent complexes are used as raw materials, and a maillard reaction is utilized for preparing the polyphenol-protein / polypeptide-carbohydrate covalent complexes. According to the preparation method, the natural raw materials are adopted, no any organic reagent is adopted, the polyphenol-protein / polypeptide-carbohydrate covalent complexes with the good performance can be obtained through two steps, the preparation method is simple, efficient and safe, and production is easy. The polyphenol-protein / polypeptide-carbohydrate covalent complexes have the high oxidation resistance and emulsibility, and the beta-carotene emulsion stabilized by means of the polyphenol-protein / polypeptide-carbohydrate covalent complexes has the good physical and chemical stability.
Owner:CHINA AGRI UNIV
Fluorine-free nano durable super hydrophobicity finishing method for cellulose fabric
InactiveCN101591853AEasy to prepareThe preparation method is safeVegetal fibresCelluloseOrganic acid
The invention relates to a fluorine-free nano durable super hydrophobicity finishing method for cellulose fabric, which comprises the following steps: (1) preparing hydrous medium solution containing tetra-alkyl ester silicate, polycarboxylic acid and a crosslinked catalyst, oscillating and stirring the hydrous medium solution to obtain SiO2 sol, soaking and rolling the cellulose fabric twice respectively, and curing the cellulose fabric; and (2) preparing non-aqueous solvent solution of alkyl siloxane catalyzed and hydrolyzed by using inorganic acid or organic acid water solution, soaking the cellulose fabric in the solution, and curing the cellulose fabric. The method is simple and safe, has low performance requirement on equipment, is easy for industrialization, and is particularly applicable to the hydrophobicity finishing of the cellulose fabric.
Owner:DONGHUA UNIV
Pomegranate-like structured composite material preparation method
InactiveCN104300125AEasy to prepareThe preparation method is safeMaterial nanotechnologyCell electrodesMaterials preparationSilica particle
The invention discloses a pomegranate-like structured composite material preparation method which comprises the following steps: S1, taking a polyacrylonitrile solution, adding silica nanoparticles, and fully dispersing; S2, adding deionized water after stirring for emulsification to obtain a mud like precursor; S3, heating the mud like precursor obtained in the S2, and annealing to obtain a solid composite; and S4, grinding the solid composite obtained in the S3 into micron particles, adding a hydrogen fluoride solution for corrosion for a certain period of time, washing hydrogen fluoride, and drying to obtain a pomegranate-like structured composite material. According to the method, polyacrylonitrile is used for coating the silica particle surface, the polyacrylonitrile is emulsified when meeting water, so that the coated silicon particles are agglomerated, the coated silicon particles are carbonized and ground for formation of the pomegranate shaped structured silicon carbon composite material, HF is used for direct corrosion of the silicon nanoparticles in the material for preparation of the hollow pomegranate-like structured composite material, and detailed structure characterization and electrochemical performance testing of the material show that the material is good in performances.
Owner:SUN YAT SEN UNIV
Multifunctional wearable polymer/MXene compound fabric heater and preparation method thereof
PendingCN111501326AGood flame retardant and antibacterial functionGood durability and breathabilityHeat resistant fibresVegetal fibresPolymerMaterials science
The invention relates to flexible wearable fabric, in particular to a multifunctional wearable polymer / MXene compound fabric heater and a preparation method thereof. The preparation method of the polymer / MXene compound fabric heater comprises the following steps that (1) polymer-based fabric is washed after being soaked in an alkali solution, and pre-treated polymer-based fabric is prepared; (2),LiF powder and an HCl solution are stirred to prepare an etching solution; (3) MAX phase powder is added into the etching solution to be stirred, reaction products are prepared, the reaction productsare centrifuged after being diluting, supernate is removed, sediment MXene is prepared, deionized water is added into the sediment MXene, ultrasonic treatment and centrifugation are carried out successively, and an MXene solution is prepared; and (4) after being dipped in the MXene solution, the pre-treated polymer-based fabric is taken out and then dried, and the polymer / MXene compound fabric heater is prepared. When the thickness of the prepared polymer / MXene compound fabric heater is 340 micrometers, the electromagnetic shielding effectiveness of the polymer / MXene compound fabric heater is42.1 dB, and meanwhile the polymer / MXene compound fabric heater has good permeability, flame retardant and anti-bacterial functions.
Owner:ZHENGZHOU UNIV
Novel coronavirus antigen epitope and application thereof
ActiveCN111848753AImproving immunogenicityHigh titerSsRNA viruses positive-senseAntibody mimetics/scaffoldsAntigen epitopeCoronavirus vaccination
The invention provides a novel coronavirus antigen epitope and application thereof. A super computer is used for simulating S, E, M and N protein structures of the novel coronavirus, and novel coronavirus epitopes SEQ ID NO 1-38 are obtained through calculation. The epitopes have very good immunogenicity; an antibody generated by inducing a part of epitope polypeptide has the effect of neutralizing the novel coronavirus; the antigen epitope can be combined with antibodies in serum of novel coronavirus patients at home and abroad, has the potential of resisting various novel coronavirus strains, and also has the potential of identifying and applying different strains. The epitope provided by the invention can be used for (1) research and development of novel coronavirus vaccines and universal coronavirus vaccines such as MERS viruses and SARS viruses; and (2) preparing a novel coronavirus antibody, and further detecting and typing viruses and treating diseases caused by the viruses. Thenovel coronavirus antigen epitope has a wide application prospect in the aspects of prevention of coronavirus and propagation and outbreak thereof, and detection and diagnosis of virus strains.
Owner:INST OF PROCESS ENG CHINESE ACAD OF SCI
Polymer-coating silicon/lithium metasilicate cathode material and preparation method thereof
ActiveCN108321368AIncrease capacityImprove the first Coulombic efficiencyCell electrodesLithium electrodePolymer coating
The invention discloses a polymer-coating silicon / lithium metasilicate cathode material, which is prepared from a silicon / lithium metasilicate composite material and a polymer coating layer coating the outside of the silicon / lithium metasilicate composite material; and the polymer coating layer is a coating layer formed by one of polypyrrole, polyaniline, polydopamine and polyacrylonitrile. The invention further provides a preparation method of the polymer-coating silicon / lithium metasilicate cathode material. The preparation method comprises the following steps: preparing the silicon / lithiummetasilicate composite material and preparing the polymer coating layer. The process of the preparation method is simple and feasible, and is convenient for large-scale production; the polymer-coatingsilicon / lithium metasilicate cathode material is high in practicalization degree; the obtained material is high in reversible capacity and high in cycle performance, and has a wide application prospect in the aspect of lithium ion battery cathodes.
Owner:HEFEI GUOXUAN HIGH TECH POWER ENERGY
Waste polymer modified asphalt composition and preparation method thereof
The invention relates to a waste polymer modified asphalt composition. The waste polymer modified asphalt composition comprises following components in parts by weight; 60-85 parts of petroleum asphalt, 6-20 parts of a waste polymer material, 1-8 parts of a compatilizer, 1-1.5 parts of SBS, 0.01-0.5 parts of a stabilizing agent, and 1-10 parts of one or more of native asphalt, coal pitch or biological asphalt. The waste polymer modified asphalt composition can well increase high-temperature storage stability of waste polymer material modified asphalt; pre-swelling performance of the polymer material and similar compatibility with asphalt are improved as the compatilizer is added; storage stability of the waste polymer material in asphalt can be improved extremely as a small quantity of SBS and a small quantity of the stabilizing agent are added; producing cost of the composition can be decreased as the native asphalt, coal pitch or biological asphalt replaces a portion of the petroleum asphalt; the prepared modified asphalt is excellent in high-temperature performance and low-temperature ductility; and the preparation method is simple, safe, and convenient for industrial application.
Owner:河北省高速公路邢汾管理处 +1
Covalent organic framework and preparation method thereof
ActiveCN107540801AHigh reaction yieldThe preparation method is safeEnvironmental resistanceMetal-organic framework
The invention discloses a covalent organic framework and a preparation method thereof. The preparation method comprises the following step: performing polymerization reaction on a compound shown as aformula II and hydrazine or a P-phenylenediamine compound shown as a formula IV in water in the presence or the absence of acid. The preparation method of the covalent organic framework utilizes the water as a reactive solvent for the first time, is high in reaction yield, safe, environmentally friendly, cost reduction and suitable for large-scale industrial production. The covalent organic framework prepared by the preparation method disclosed by the invention is larger in specific surface area and wide in application prospect in the fields of gas adsorption and separation, photo-electricityor catalysis and the like.
Owner:SHANGHAI INST OF ORGANIC CHEMISTRY - CHINESE ACAD OF SCI
High-performance silicon-based thermal-conducting gel and preparation method thereof
The invention discloses high-performance silicon-based thermal-conducting gel and a preparation method thereof. The silicon-based thermal-conducting gel is prepared from organic silicone gel, hydrogen-containing silicone oil, hydroxyl silicone oil and thermal conductive powder, wherein the thermal conductive powder is prepared by polar matching of different kinds of powder according to large, medium and small particle sizes. The high-performance silicon-based thermal gel has excellent thixotropy, high thermal conductivity and good blocking property and is capable of replacing a thermal gel gasket; operation can be carried out by a dispensing machine in application; the production efficiency is greatly improved; a macromolecular structure in thermal conductive mud is connected into a mesh in the fabrication process; seepage of low molecular silicone oil is effectively blocked; and the high-performance silicon-based thermal gel has relatively high high-temperature resistance, is simple and feasible in preparation method, simple to operate in application, safe and reliable.
Owner:江苏晶河电子科技有限公司
Lithium nickel cobalt aluminum oxide and lithium manganese oxide composite material used for lithium ion battery and preparation method thereof
ActiveCN104037404AReduce solubilityComplete structureCell electrodesSecondary cellsCobaltLithium-ion battery
The invention discloses a lithium nickel cobalt aluminum oxide and lithium manganese oxide composite material used for a lithium ion battery and a preparation method of the lithium nickel cobalt aluminum oxide and lithium manganese oxide composite material. According to the method, suspension liquid is prepared through mixing lithium nickel cobalt aluminum oxide with water, doped type lithium manganese oxide precursors are prepared by the utilization of a co-precipitation method, so that the prepared precursors are evenly precipitated on the surface of lithium nickel cobalt aluminum oxide, and through calcination, crushing and screening, the composite material which is doped with lithium manganese oxide and coated with the lithium nickel cobalt aluminum oxide is obtained. According to the material, the lithium nickel cobalt aluminum oxide (the structural formula is LiNi0.8Co0.15Al0.05O2) serves as a core, and the doped lithium manganese oxide < the structural formula is LiMn2-xMxO4 (0.1<=x<=0.5), and M is one or two of Mg, Co, Al, Cr, Zn and Ti> serves as a shell. The doped lithium manganese oxide serves as a coating layer, through a combination of a control crystallization method and a liquid-phase ball milling method, the doped type lithium manganese oxide precursors are prepared, the defects that a traditional lithium manganese oxide material is low in energy density, and cycling performance of the lithium nickel cobalt aluminum oxide is poor are overcome, the capacity of the material is high, and the cycling performance is excellent. The preparation method is simple, and industrial production is easy.
Owner:TIANJIN B&M SCI & TECH
Porcine seneca valley virus strain and application thereof
ActiveCN107513524AGood strain backgroundLay the material foundationSsRNA viruses positive-senseViral antigen ingredientsPig farmsDisease
The invention discloses a porcine seneca valley virus strain and an application thereof. In the invention, the seneca valley virus strain CH-FJZZ-2017 is isolated from pathological materials of porcine idiopathic vesicular disease in a pig farm in Fujian Province, with the preservation number of CGMCC No. 12160. The isolated porcine seneca valley virus CH-FJZZ-2017 in the invention is isolated from swinery newly suffering from the epidemic disease within Chinese territory, represents the current epidemic predominant virus strain in China, has a good virus strain background, and can be used as an inactivated vaccine production virus strain and a virus seed for testing, thereby providing a material for subsequent relevant experimental study, and laying a material foundation.
Owner:CHINA ANIMAL HUSBANDRY IND
Antiflaming one-component modified silane polyether sealant and preparation method thereof
InactiveCN103333653AImprove flame retardant performanceImprove adhesionNon-macromolecular adhesive additivesOther chemical processesCross-linkPolymer resin
The invention discloses an antiflaming one-component modified silane (MS) polyether sealant and a preparation method thereof. The sealant comprises an MS premix compound, a cross-linking agent, a coupling agent and a catalyst, wherein the MS premix compound consists of MS-polymer resin, a plasticizer, antiflaming packing, reinforcement packing, a thixotropic agent and a performance assistant. The preparation method comprises the steps that the MS premix compound, the cross-linking agent, the coupling agent and the catalyst are dispersed uniformity, and the efficiently antiflaming one-component modified silane polyether sealant is obtained.
Owner:SHANGHAI KUIGU RUBBER & PLASTIC PROD
Method for preparing vinylimidazole ionic liquid
The invention relates to a method for preparing vinylimidazole ionic liquid, which is characterized by taking N-alkyl imidazole, 1,2-halogenated ethane and triethylamine (or diethylamine, amine compounds) as raw materials, and adopting a two-step method to synthesize the vinylimidazole ionic liquid. Compared with a traditional method, the method avoids using the vinylimidazole and the halogenatedhydrocarbon with higher price as the raw materials, adopts the common N-alkyl imidazole, 1,2-halogenated ethane and triethylamine (or diethylamine, amine compounds) with relative inexpensive price asthe raw materials to synthesize the vinylimidazole ionic liquid, has higher economical efficiency and is feasible for industrial production and application.
Owner:INST OF PROCESS ENG CHINESE ACAD OF SCI
Preparation method and application of negative electrode material MXene for lithium battery
ActiveCN108615871AThe preparation method is safeThe preparation method is simple and environmentally friendlyCell electrodesSecondary cellsElectrolytic agentHydrofluoric acid
The invention relates to a preparation method of a negative electrode material MXene for a lithium battery and belongs to the field of preparation of negative electrode materials for lithium batteries. The method comprises the following steps of (1) taking MAX powder as a positive electrode and IA or IIA group metals as a negative electrode, putting the positive electrode and the negative electrode into an electrolyte to form a battery system and carrying out charging and discharging; and (2) after charging and discharging are completed, putting the obtained product into an acid solution for soaking and drying to obtain the negative electrode material MXene for the lithium battery. Compared with the prior art, the preparation method has the advantages that the battery system is formed by taking an MAX-phase material as the positive electrode and the IA or IIA group metals as the negative electrode, charging and discharging are carried out, and atoms, such as Cr, Al and Si in the MAX-phase material are removed to obtain the MXene material with a porous silicon structure; and the raw material, namely hydrofluoric acid, which is dangerous and harmful to the environment and human bodyis not adopted to prepare the MXene material, so that the preparation method disclosed by the invention is safer and more environment-friendly than a traditional method.
Owner:SHANDONG UNIV
Aqueous electrolyte for improving reversibility of neutral zinc-manganese battery and preparation method of aqueous electrolyte
PendingCN112086694AThe preparation method is safeEasy to prepareSecondary cellsAqueous electrolytesElectrolytic agentElectrical battery
The invention relates to an aqueous electrolyte for improving reversibility of a neutral zinc-manganese battery and a preparation method of the aqueous electrolyte, and the preparation method comprises the following steps: 1, preparing an inorganic zinc salt basic electrolyte: dissolving inorganic zinc salt in water, and stirring at room temperature to obtain the inorganic zinc salt basic electrolyte with a certain concentration; and 2, adding a certain amount of organic complexing agent according to the complexing molar ratio, and stirring at room temperature; according to the invention, thebeneficial effects are that the electrolyte wherein the positive electrode and the negative electrode are in direct contact is designed, the attenuation problem of the negative electrode and the positive electrode is solved, the stability of the current zinc-manganese battery based on the neutral aqueous electrolyte is improved, and the purpose of improving the reversibility of the neutral zinc battery is achieved. According to the electrolyte, the organic component is introduced, the electrolyte maintains the high safety characteristic of the original aqueous electrolyte, the introduced organic component is environmentally friendly and low in cost, and the electrolyte is suitable for any battery system based on a zinc metal or zinc alloy negative electrode and batched and large-scale battery preparation and production.
Owner:浙江浙能中科储能科技有限公司 +1
Preparation method, detecting method and application of moxifloxacin hydrochloride impurity
ActiveCN104292158AThe preparation method is safeEasy to prepareOrganic chemistryComponent separationCinoxacineBiochemistry
The invention discloses a preparation method and a detecting method of a moxifloxacin hydrochloride photodegraded impurity and an application of the moxifloxacin hydrochloride photodegraded impurity as an impurity reference substance during detection of a moxifloxacin hydrochloride related substance. Through the preparation of the compound, the reference substance is provided for analysis of the moxifloxacin hydrochloride related substance, so as to improve the quality standard of moxifloxacin hydrochloride, and provide important guidance significance for safe medication of moxifloxacin hydrochloride.
Owner:NANJING CHIA TAI TIANQING PHARMA
6-carboxy chitin, its preparation method and use
InactiveCN1718591AExcellent moisturizing rateWide variety of sourcesCrystal structureChitin formation
A 6-carboxychitin (C14H20O10N2)n with high hydroscopicity is prepared from chitin or chitosan through physical or chemical treating, and using NaC10 or NaBr to oxidize the hydroxy at C-6 site under existence of TEMPO to become carboxy and obtain water-soluble 6-carboxychitin. It can be used for cosmetics and medicines.
Owner:SHENZHEN HEPALINK PHARMA GRP CO LTD
Preparation method of stripping boron nitride anticorrosive coating, coating obtained by preparation method and application of coating
InactiveCN104629510AIncrease thermal conductivity and heat resistanceGood mechanical propertiesAnti-corrosive paintsSolventCorrosion
The invention discloses a preparation method of a stripping boron nitride anticorrosive coating. The preparation method specifically comprises the following steps: 1, performing ultrasonic stripping on hexagonal boron nitride in a solvent, washing, and performing freeze-drying to prepare stripping boron nitride; 2, removing stains, iron rusts and other impurities from the surface of a base material; 3, mixing the stripping boron nitride with an organic coating by virtue of ultrasonic or mechanical stirring to prepare the stripping boron nitride anticorrosive coating; and 4, coating the stripping boron nitride anticorrosive coating to the surface of a metal matrix to obtain a stripping boron nitride anticorrosive coating layer. The preparation method disclosed by the invention can be used for effectively solving the problems in the prior art and preparing an ultrathin anticorrosive coating layer which is superior in corrosion resistance.
Owner:DALIAN UNIV OF TECH
Method for separating and purifying polysaccharides of dendrobium officinale by aqueous two-phase extraction
The invention belongs to the technical field of plant active ingredient extraction, and provides a method for separating and purifying polysaccharides of dendrobium officinale by aqueous two-phase extraction in order to solve the problem of using an organic solvent having a safety hazard as an extractant to purify proteins mixed in the polysaccharides in extraction of the polysaccharides from thedendrobium officinale. Stalks of the dendrobium officinale are dried and pulverized; powder of the dendrobium officinale is dissolved in active water according to a ratio of material to liquid 1: 50,and a solution is treated twice by ultrasonic waves; leaching liquors of two-time ultrasound are combined; the leaching liquors are precipitated with ethanol; and obtained precipitation is heated anddissolved by ethanol with the concentration 80%, and the proteins mixed in crude polysaccharides are removed with a PEG / ammonium sulfate mixed solution. Usage of toxic chloroform is avoided to purifythe crude polysaccharides, and the purity reaches 90-95%. The extraction rate is 177-187% of the extraction rate of a conventional hot water extraction method and an ultrasonic extraction method. Thepolysaccharides obtained by extraction has obvious capability to remove DPPH free radicals and hydroxyl radicals, and has significant antioxidant capacity. The method provides reference for preparation methods of other plant polysaccharides.
Owner:SHANXI UNIV
Li4Ti5O12 materials with spinel structure and preparation process and use thereof
InactiveCN1837057AGrowth inhibitionSmall particle sizeFixed capacitor electrodesCell electrodesDischarge efficiencyPolymer science
The invention belongs to electrochemistry technology realm, concretely referring to the Method for preparation of a spinel structure Li4Ti5O12, the getted Li4Ti5O12 material by this method and its application. The Process for preparing of Li4Ti5O12 by this invention is simple, the realization is easy, the souce of raw material is wide, and the cost is low. Adding additive can control the appearance and crystal structure effectively, improving electrochemistry performance of product. The getted material has the advantage of high specific capacity, good circulatory performance, high charging and discharging efficiency and so on. This kind of material can be used as negative electrode material of diversified lithium ion battery widely, and as electrode material of capacitor.
Owner:FUDAN UNIV
Skid and scrub resistant rotationally molded product and preparation method thereof
ActiveCN103772798AImproves surface slip resistanceExtended service lifeCoatingsLow-density polyethyleneLinear low-density polyethylene
The invention discloses a skid and scrub resistant rotationally molded product and a preparation method thereof, and belongs to the technical field of rotationally molded materials. The skid and scrub resistant rotationally molded product comprises a low-density polyethylene base and a skid and scrub resistant layer added on the base, and the skid and scrub resistant layer is composed of linear low-density polyethylene, an inorganic wear-resisting agent, a high molecular reinforcing agent and an auxiliary agent. The rotationally molded product is prepared through three steps: processing of the inorganic superfine wear-resisting agent, preparation of a rotational molding composition for the skid and scrub resistant layer, and preparation of the rotationally molded product. The skid and scrub resistant rotationally molded product has smooth inner surface and outer surface, is good in layer combination, and has no warping, no deformation, no foams and no recesses, the scrub-wear volume loss of the product is reduced by 50% or more, and the preparation method of the skid and scrub resistant rotationally molded product is simple, safe and obvious in effect.
Owner:CHINA PETROLEUM & CHEM CORP
Gel ball and preparation method thereof
ActiveCN103861538ANot easy to deform out of waterNot easy to change colorMicroballoon preparationFood preparationCross-linkMicroorganism
The invention provides a preparation method of a gel ball. The preparation method of the gel ball comprises the following steps: a, mixing sodium alginate, konjac glucomannan and sugar with water to obtain a mixed solution; b, mixing the mixed solution with citric acid monohydrate, potassium sorbate and pigment to obtain a co-mixed sol; and c, adding the co-mixed sol to a calcium lactate solution and carrying out cross-linking to obtain the gel ball. The pH value of the gel ball prepared by the preparation method is 3.9-4.4, the Brix value is 4.5%-7.5% and the particle diameter is 3.0mm-6.0mm. The gel ball is stable under the acid conditions and has small possibilities of deforming out of water, changing color and taste and growing microorganism; the gel ball can be added to jelly or other foods for use. Experimental results show that the composite gel ball prepared by the method can be placed in a heat preservation box at a temperature of 37 DEG C without change in color, taste, hardness and the like in nine weeks; microbiological detection is also qualified.
Owner:山东大旺食品有限公司
Tritium isotope microcell and preparation method thereof
InactiveCN102446572AIncrease output currentIncrease output powerRadiation electrical energyGold layerTitanium
Owner:INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
Powder material for preparing high-strength high-toughness yttrium stabilized tetragonal polycrystal zirconia ceramics and preparation method of powder material
The invention discloses a powder material for preparing high-strength high-toughness yttrium stabilized tetragonal polycrystal zirconia ceramics. The powder material is prepared from zirconia and yttrium oxide, wherein the content of the yttrium oxide is 1.4-2.6mol% of the total amount of Zr<4+>; and the average grain size of raw crystal of the powder material is 50-110nm. Moreover, the invention further discloses a preparation method of the powder material. According to the zirconia powder material, the doping amount of yttrium is reduced, the tetragonal polycrystal ceramics prepared by using the powder are capable of realizing full tetragonal phase stable existence of zirconia at room temperature to guarantee the characteristic of high strength, activating the tetragonal phase in TZP (tetragonal zirconia polycrystalline), improving the transformation toughening performance and further optimizing the fracture toughness of TZP ceramics. The preparation method is safe and reliable, has the advantages of wide raw material source, low energy consumption and remarkable effect on energy conservation and emission reduction, is convenient for popularization and application, is suitable for industrial large-scale production, and can be used for effectively promoting application and development of zirconia materials.
Owner:江西赛瓷材料有限公司 +1
A kind of mechanochemical method prepares the method for cobalt ferrite nanoparticle
The invention relates to a method for mechanochemically preparing spinel magnetic cobalt ferrite nanoparticles. The steps of the method are: weighing an appropriate amount of cobalt salt, iron salt and citric acid according to a certain molar ratio, adding an appropriate amount of absolute ethanol to mix evenly, adding zirconium balls, and the mass ratio of the ball material is 2:1; The material is put into a high-energy planetary grinding tank, and ground at 200-600r / min. The material is ground under the action of mechanical force for 5-10 hours to obtain a wet gel. The wet gel is dried at 100°C and placed in a high-temperature furnace. Calcining at 500° C. for 4 hours, the spinel-type magnetic cobalt ferrite nanoparticles can be obtained. The chemical formula of this ferrite is CoxFeyO4, where x+y=3, the average grain size is 40-100 nm, the shape is spherical, regular tetrahedral or regular octahedral, and the saturation magnetization is 25-60 emu / g. The invention has the advantages of simple process, less energy consumption, easy control of production links, and easy realization of industrialized production; it solves the problems of high cost, high energy consumption, complicated process and the like in the prior art.
Owner:YANCHENG INST OF TECH
NBT/PVDF three-layer structured composite material for energy storage and preparation method thereof
InactiveCN108101384AHigh polarizationHigh energy storage densityCoatingsPolyvinylidene difluorideSolvent
The invention discloses an NBT / PVDF three-layer structured composite material for energy storage and a preparation method of the NBT / PVDF three-layer structured composite material for the energy storage. NBT particle powder is prepared through a ball-milling method; PVDF is divided into three parts which are respectively dissolved in a solvent to obtain three PVDF solutions; the NBT particle powder is divided into two parts and respectively added to two PVDF solutions to obtain two NBT / PVDF stock solutions; the NBT / PVDF stock solutions, the PVDF solutions and the NBT / PVDF stock solutions are laminated and subjected to tape casting on a glass substrate sequentially by using a multi-layer tape casting process. A middle layer of the composite material is a pure PVDF polymer, and the two layers of the upper and lower layers are NBT / PVDF composite layers, dielectric ceramic particles are added in an upper-lower two-layer structure, the polarization intensity and energy storage density are used, and the middle layer uses the pure PVDF polymer to obtain high breakdown field strength.
Owner:SHAANXI UNIV OF SCI & TECH
Preparation method and application of flaky nano copper oxide
ActiveCN110436508ASimple preparation processReduce manufacturing costNanotechnologyCopper oxides/halidesPhotocatalytic degradationCopper salt
The invention discloses a preparation method and application of flaky nano copper oxide. The preparation method of the flaky nano copper oxide mainly comprises the following steps: accurately weighingcopper salt and oxalic acid or oxalate, uniformly mixing the copper salt and the oxalic acid or the oxalate, then grinding, adding a proper amount of distilled water in the grinding process to enablethe mixture to be in a fluid state, heating, cleaning and drying after grinding to obtain a precursor copper oxalate, and calcining the precursor copper oxalate to obtain the flaky nano copper oxide.A preparation technology is simple, no organic solvent except ethanol is used in a preparation process, the preparation method is environment-friendly and safe, and prepared flaky nano copper oxide particles are uniform in size and small in particle size, and have good photocatalytic degradation performance on a methylene blue solution.
Owner:GANSU AGRI UNIV
Porcini essential oil, essential oil seasoning and preparing method thereof
The present invention discloses a porcini essential oil and a essential oil seasoning, belonging to the field of food additives. The preparing method of the porcini essential oil comprises the following steps: adding porcini dry powder or porcine flavour dry powder to absolute ethyl alcohol by ratio, uniformly mixing, leaching at a temperature of 25 DEG C to 70 DEG C for 1 to 3 hours, and filtering to obtain alcohol extracting solution; concentrating under reduced pressure to obtain extract; dissolving the extract, standing, discarding deposits, and collecting superfacial solution to obtain porcini essential oil. Porcini powder essential oil and the essential oil seasoning can be obtained by adding other ingredients to the porcini essential oil. The porcini essential oil and the essential oil seasoning reserve the fragrance of porcini, and are ideal food additives. The yield of the porcini essential oil is improved by utilizing the endogenous lipoxidase of porcini with a biologic conversion method. The present invention can utilize porcini leftovers for production, so the cost is low, and porcini resources can be thoroughly utilized. The method is simple, safe and free of environmental pollution.
Owner:CHUXIONG HONGGUI GREEN FOOD
Water-soluble florfenicol clathrate with high bioavailability and preparation method of water-soluble florfenicol clathrate
InactiveCN106390136ALow hemolyticIncreased hemolysisAntibacterial agentsOrganic active ingredientsSolubilityWater baths
The invention discloses a water-soluble florfenicol clathrate with high bioavailability. The water-soluble florfenicol clathrate is prepared from the following components in parts by weight: 5-15 parts of florfenicol or pharmaceutically acceptable salt of florfenicol, 20-60 parts of a florfenicol adsorption carrier, 1-2 parts of an absorption promoter, and 10-30 parts of a florfenicol cosolvent. For the florfenicol clathrate provided by the invention, the solubility of florfenicol is effectively improved, the bioavailability of florfenicol is improved, the hemolysis property of the medicine is alleviated, the release rate of the medicine is controlled, and the bad smell is masked. The preparation method provided by the invention comprises the following steps: firstly, mixing the florfenicol adsorption carrier, the absorption promoter and the florfenicol cosolvent, adding with florfenicol or the pharmaceutically acceptable salt of florfenicol under the water bath water control condition, carrying out stirring, carrying out heat preservation, and carrying out drying, thus obtaining the florfenicol clathrate. The technological operation is simple, the abundant time and manpower are saved, and during the preparation process, no organic solvents are used, so that the preparation method is safe and reliable and is free of pollution, and the process is simple and easy to realize.
Owner:SHIJIAZHUANG WEIERLI ANIMAL PHARMA
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