1740results about How to "Conditions are easy to control" patented technology

The invention provides a preparation method of an epoxy-modified insulated thermal-conductive high-temperature resistant organosilicon coating, comprising the following steps: preparing raw materials; synthesizing an organosilicon pre-polymer; synthesizing an epoxy-modified organosilicon resin; and preparing the epoxy-modified insulated thermal-conductive high-temperature resistant organosilicon coating. The invention also provided the epoxy-modified insulated thermal-conductive high-temperature resistant organosilicon coating prepared by the method. The coating is composed by the epoxy modified organosilicon resin, fillers, a coupling agent and solvents. The coating prepared by the method in the invention takes account of insulation, thermal-conductivity, and high-temperature resistance at the same time, has coating adhesion of first level, hardness of 5H, a breakdown voltage of 1800V/0.5mA, 2 seconds, a heat transfer coefficient of larger than 100W/(m<2>.K), and no obviously changed coating at a temperature of 250 DEG C for 24 hours, therefore the coating can be widely used in various industrial equipment and household appliances.

The invention discloses a thermoplastic polyurethane elastomer foam material, which is prepared from the following raw materials by weight: 80-100 parts of a thermoplastic polyurethane elastomer, 10-40 parts of a filler, 4-7 parts of a foaming agent, 0.6-1.5 parts of a cross-linking agent, 1.0-1.5 parts of a cross-linking assistant, 0.1-1.0 part of a mildew proof antibacterial agent and 1.2-2.0 parts of a lubricant. Adopting the above technical scheme, the invention has the beneficial effects of improving the foam expansion of the thermoplastic polyurethane foam material, expanding the scope of usage of the polyurethane foam material, and realizing compression deformation of a finished product produced from the thermoplastic polyurethane foam at no more than 35%, which is unmatched by an EVA foam material with equivalent foam expansion and similar elasticity. In addition, the foam material improves the performance of existing traditional foam materials, and solves the defects that polyester-type thermoplastic polyurethane elastomer has short service life, easily goes moldy on the product surface and generates mechanical performance loss in the field and damp and hot environment.

This invention discloses a preparation method for spinel lithium titanate nm pipes/nm lines used in Li batteries and capacitors, which applies cheap industrial TiO2 as the raw material and supersonic chemical method to prepare said nm pipes/lines then takes them as the raw materials to be mixed with a certain quantity of soluble Li salt solution to be baked in air and by low-temperature hydrothermal ion exchange method to manufacture spinel lithium titanate nm pipes/lines with uniform shape, uniform diameter and even larger major diameter ratio and big ratio surface area.

The invention discloses a preparation method of a 3D printing inorganic powder molding material. The method is characterized in that the method comprises the following steps: 1, powder material pretreatment: mixing 10-30% of acetone with 62-85% of a powdery material and 2-10% of gamma-(2,3-epoxypropoxy)propyltrimethoxysilicane, and grinding the obtained mixture at a rotating speed of 500-1000rpm for 1-2h to obtain a pretreated powdery material; and 2, molding material preparation: adding 40-65% by mass of acetone, adding 2-8% of polyvinyl formal, stirring for dissolving, adding 30-55% of the pretreated powdery material, stirring for uniform mixing, putting the obtained solution in a grinder, carrying out normal temperature mixing grinding at a rotating speed of 500-1000rpm for 6-9h, and carrying out spray drying to obtain the 3D printing inorganic powder molding material. The 3D printing inorganic powder molding material can be directly molded at a temperature of 190-210DEG C under a pressure of 1-10MPa without sprinkling a binder, and has the advantages of simple preparation technology, easy condition control, low production cost and easy industrialized production.

The invention relates to a preparation method for cerium oxide/graphene oxide nanocomposite. The invention aims at providing a preparation method of cerium oxide/graphene oxide nanocomposite, and the preparation method is low in equipment requirement, simple to operate and fast in reaction speed, and is capable of saving energy consumption and uniformly dispersing metal nanoparticles on the surface of graphene. The method comprises the steps of: based on cerate, sodium acetate, urea and graphite oxide as raw materials, placing graphite oxide and water into a container, and carrying out ultrasonic treatment so that graphite oxide form a suspension in the water; placing cerate, sodium acetate and urea into the container for dissolving cerate, sodium acetate and urea into the water; and placing the container into a reactor with a backflow device for reaction until the reaction is finished, so as to obtain a black precipitate namely cerium oxide/graphene oxide nanocomposite.

The invention discloses a graphene/polyaniline/sulfur composite material characterized in that graphene oxide is reduced to graphene by aniline, meanwhile, the aniline is oxidized and polymerized to polyaniline, and sulfur particles produced by sodium thiosulfate and hydrochloric acid are evenly distributed on a graphene polyaniline conducting layer in a reaction process. The invention further discloses a preparation method of the graphene/polyaniline/sulfur composite material. The method comprises the steps as follows: firstly, dispersing the graphene oxide in water to form a uniform graphene oxide solution, then dissolving an aniline solution into the hydrochloric acid to form an aniline salt solution, and adding the aniline salt solution into the graphene oxide solution; dissolving a sodium thiosulfate solid into the water to form a sodium thiosulfate solution, dropwise adding the odium thiosulfate solution into a graphene oxide and aniline mixed solution, stirring the mixture at a certain temperature for a moment, and separating, washing and drying produced deep green precipitation to obtain the graphene/polyaniline/sulfur composite material. The method is low in energy consumption, simple to operate, good in controllability, high in yield and suitable for mass production.

The biological material film with porous structure is medical film of polyamide or composite polyamide/nanometer osteolith material with through pores in gradually changed sizes, and has one compact side with fine pores in diameters of 0.01-30 microns and the opposite loose side with large pores in diameters of 30-300 microns. During its preparation, solvent with high volatility is used as the dispersant, medical polyamide or composite polyamide/nanometer osteolith material is heated and stirred to form the filming liquid, and film is formed and washed with deionized water to obtain the biological film. The porous biological film has controllable porous structure, and excellent mechanical performance and biological performance, and may be used widely as medial separating film, medicine slow releasing film, tissue regeneration inducing film, etc.

The invention discloses a method for preparing edible safflower tea oil, comprising the following steps: taking safflower tea seeds as raw materials; conducting stackretting, removal of the oil tea fruit shells, and taking-off of the tea seeds for low-temperature drying below safe moisture content on the harvested mature safflower oil tea fruits, and then cleaning stone, removing shells, separating kernels and shells, and crushing till the particle size is 20 to 60 meshes and adding water for tempering; adopting a cold pressing method for extracting the tea oil; and finally conducting simple refining processes such as filtration, wintering and the like so that the quality index can achieve national first-class edible tea oil standards. The method for preparing edible safflower tea oil hassimple and feasible process, easily-controlled production conditions, less refining processes, low refining loss rate, can keep various nutritional components in the safflower tea seeds from being destroyed, leads the finished tea oil to have light, clear and transparent color, aromatic natural flavor of the tea seeds, and is a nutritional and healthy tea oil.

The invention discloses a preparation method for a high-slump-retention polycarboxylate water reducer. The preparation method comprises the following steps of: esterifying methoxylpolyethylene glycol monomethyl ethers with different molecular weights with methacrylic acid and a mixed polymerization inhibitor for a period of time under the action of a catalyst and at a certain temperature, then adding allyl alcohol in one time, further esterifying in the same conditions to obtain an esterified macromonomer MP containing crosslinking monomer allyl methacrylate; then performing aqueous solution polymerization on the MP, unsaturated sulfonate, (meth)acrylate unsaturated monomers and a chain transfer agent in a low-temperature condition and within a redox initiation system; and finally adding caustic soda liquid to neutralize, so as to obtain the polycarboxylate water reducer with a certain concentration. The high-slump-retention polycarboxylate water reducer prepared by the preparation method disclosed by the invention is a high-performance water reducer which is prepared at a low temperature by virtue of a molecular structure design, as well as is high in slump retention, excellent in dispersing performance, good in adaptability, simple in process, pollution-free, low in energy consumption, and easy to realize industrialized production.

The invention discloses a citric acid loofah sponge preparation method and an application technology. The preparation method provided by the invention is characterized by comprising the following steps of: adding 18-25 wt% of citric acid, 18-25 wt% of saponified loofah sponge and 50-60 wt% of water into a plugged Erlenmeyer flask, putting on a plug, carrying out refluxing at the temperature of 60-70 DEG C for 2-3h with stirring, heating up to the temperature of 110-120 DEG C, reacting for 2-3h, cooling, washing by using deionized water, carrying out pumping filtration until a filtrate is neutral, washing by using a few ethanol, and drying in a baking oven of 75 DEG C to obtain the citric acid loofah sponge. The citric acid loofah sponge has strong adsorption capability, can directly used for the adsorption and elution of various metal ions and organic dyes in a water body, is characterized by high adsorption efficiency, fast adsorption speed, good physical and chemical stability and excellent mechanical stability, and can be used within a wide soda acid range. Simultaneously, the citric acid loofah sponge has regeneration capability and is a natural green adsorbent.

The invention discloses a carboxylation graphene oxide/polyvinylidene fluoride compiste ultrafiltration membrane and a preparation method thereof. The carboxylation graphene oxide/polyvinylidene fluoride compiste ultrafiltration membrane is prepared by firstly, ultrasonically dispersing carboxylation graphene oxide in double solvents consisting of dimethylacetamide and triethyl phosphate, subsequently mixing with polyvinylidene fluoride, regulating the temperature to be 50-60 DEG C, mechanically stirring for dissolving, cooling to the room temperature, scraping a glass plate to form a membrane, soaking in deionized water for 3-5 days, and naturally drying in air, so as to obtain the carboxylation graphene oxide/polyvinylidene fluoride compiste ultrafiltration membrane. The carboxylation graphene oxide/polyvinylidene fluoride compiste ultrafiltration membrane disclosed by the invention is relatively good in hydrophilia and mechanical strength. The preparation method has the characteristics of simplicity, environment friendliness, easiness in condition control, short preparation period and the like.

The invention provides an aluminum oxide carrier which is higher in intensity and larger in specific surface area and is suitable for chemical industries such as olefin epoxidation reaction, alkyne and alkadiene selective hydrogenation or methane-steam conversion. The invention also provides an aluminum oxide carrier preparation method which is simple in technology and operation and has easily controlled conditions. Alpha-tri-hydro-aluminum oxide and/or surge aluminum stones and a proper amount of pseudo-boehmite and/or alumina sol which are low in cost and readily available are used as main raw materials, so that the production cost of the aluminum oxide carrier is lowered; meanwhile, due to the doping of a proper amount of a silicon source and other auxiliary ingredients, the strength of the carrier is obviously improved, and the specific surface area is properly enlarged; particularly, the strength of the carrier is further improved by controlling the temperature rise rate in a preparation process.

The invention relates to a thermo-sensitive poly N-isopropylacrylamide/polyurethane medicine-loading electro-spun fibrous membrane and a preparation method thereof, relating to a medicine-loading electro-spun fibrous membrane and a preparation method thereof and aiming to solve problems of poor mechanical property of existing poly N-isopropylacrylamide medicine-loading electro-spun fibrous membrane and no temperature sensitivity of a polyurethane medicine-loading electro-spun fibrous membrane. The thermo-sensitive poly N-isopropylacrylamide/polyurethane medicine-loading electro-spun fibrous membrane is prepared by poly N-isopropylacrylamide, polyurethane, N,N-dimethylformamide and a medicine; the preparation method comprises the following steps: 1, preparing static spinning solution; 2, dissolving the medicine so as to obtain the static spinning solution containing the medicine; 3, carrying out electrospinning; and 4, carrying out dry treatment to obtain the thermo-sensitive poly N-isopropylacrylamide/polyurethane medicine-loading electro-spun fibrous membrane. According to the invention, the preparation method is mainly used for preparing the thermo-sensitive poly N-isopropylacrylamide/polyurethane medicine-loading electro-spun fibrous membrane.

The invention discloses fast alcoholized dark green tea and a preparation method of the dark green tea. The preparation method comprises the following steps of: converting catechin with bitter taste in the raw dark green tea into theaflavin, thearubigin and theabrownin, degrading cellulose into glucose with sweet taste, converting insoluble pectin into soluble pectin (to increase the thickness of a tea soup), and degrading protein into amino acids with umami taste by adding microorganisms and an enzyme solution into the raw dark green tea under the condition with certain temperature and humidity, and applying chemical action to the resulting product in supplementation, and at last neutralizing partial acidic components with baking soda. The technical problems of long fermentation time and the generation of nauseating and sour smells in dark green tea pile fermentation are solved; the tea made from the dark green tea obtained by the preparation method disclosed by the invention is delicate and mellow in taste, orange red and transparent in tea soup, and rich in stale flavor; and the dark green tea is pretty high in contents such as soluble sugar, theaflavin, thearubigin and amino acid, and can reach the taste effect of old tea more than 5 years in about 4 days.

The invention discloses a preparation method and application of a composite antibacterial electrostatic spinning nanofiber membrane. The preparation method is used for an antibacterial air filtering material for masks. The material is prepared by taking polyvinyl alcohol, chitosan, vinyl amine-copolymerized-3-allyl-5,5-dimethyl hydantoin as raw materials. The preparation method comprises the following steps: uniform blend spinning is carried out on the polyvinyl alcohol and the chitosan to obtain a material as an innermost-layer nanofiber membrane and an outermost-layer nanofiber membrane, andan auxiliary antibacterial effect and a mechanical supporting effect are achieved; an intermediate layer is prepared by carrying out blend spinning on the polyvinyl alcohol and the vinyl amine-copolymerized-3-allyl-5,5-dimethyl hydantoin, and a main antibacterial effect is achieved; and a three-layer nanofiber membrane obtained by spinning is placed in glutaraldehyde steam for cross-linking treatment. The preparation method disclosed by the invention is simple and feasible and is controllable in condition, and the composite antibacterial electrostatic spinning nanofiber membrane is excellentin interception effect and sterilization effect and has important value and significance in the field of antibacterial filtering materials for masks.

The invention relates to the field of preparation of activated carbon, specifically to a preparation method for biomass activated carbon. The preparation method comprises the following concrete steps: S1, pulverizing of raw materials; S2, preparation of a solution; S3, carbonization treatment; S4, activation treatment; and S5, drying treatment. All the raw materials used in the invention are biomass waste; the biomass waste that is usually discarded at ordinary times is subjected to a series of physical and chemical changes to turn the biomass waste into activated carbon which can be used by people; carbon monoxide and methane syngas are produced during experiments, and the methane syngas can be collected through exhaust gas collection and used as clean energy; the preparation of the biomass activated carbon broadens the sources of raw materials for preparation of the activated carbon, provides a basis for the subsequent research of biomass raw materials, and is of great significance to multi-directional and high value-added utilization of biomass waste; and the preparation method is simple to operate, and conditions are easy to control.

The invention provides a probe based on double-signal amplification triggered by a target and application of the probe. The probe comprises a first hairpin, a second hairpin and a third hairpin, wherein the first hairpin, the second hairpin and the third hairpin are formed by pairing hybridization of complementary bases in folding areas after single-chain linear molecules are folded back; the parts, forming double-chain structures in the partial areas, of the hairpins are stem areas, and the parts, not forming the double-chain structures and folded back, are ring-shaped areas. According to the probe provided by the invention, the self-assembly of hairpins is realized through target protein catalysis, signal amplification is achieved under the assistance of an excision enzyme III, obvious amplification of a detection signal is realized, and the detection sensitivity is greatly improved further; since the probe does not depend on template replication in the detection process, the problem that false positive occurs due to cross contamination in the detection process is avoided, generation of a false positive signal is effectively prevented and background noise is reduced greatly.

The invention relates to a polymer containing a piperidine tertiary amine group, an anion exchange polymer, and preparation methods and applications thereof. The polymer containing the piperidine tertiary amine group comprises fluorene structural units represented by a formula (1A) and/or a formula (2A), and piperidine tertiary amine structural units represented by a formula (3'A), wherein the anion exchange polymer comprises a fluorene structural unit represented by a formula (1A) and/or a formula (2A), and a piperidine quaternary ammonium structural unit represented by a formula (3A). The polymer containing the piperidine tertiary amine group and the anion exchange polymer provided by the invention contain fluorene groups in the main chain chemical structure, so that the material has excellent mechanical strength; in addition, the distortion and rotation of a benzene ring on the main chain are weak, and the microstructure regularity of the polymer after film formation is relatively high, so that the polymer has good main chain stability.

The present invention provides a high flexibility epoxy resin composition, which can be used in the fields of electronic packaging materials and powder coating materials, and comprises, by mass, 30-50 parts of an epoxy resin, 1-30 parts of polyvinyl butyral (PVB), 3-10 parts of a curing agent, 0.05-0.3 part of a curing accelerator, and 30-60 parts of an inorganic filler. The epoxy resin has characteristics of excellent interpenetrating network structure and excellent flexibility, and can be used in the fields of electronic packaging materials and powder coating materials.