5223 results about "Carboxylic group" patented technology

The invention relates to the technical field of friction materials, and particularly discloses an electromagnetic brake friction material prepared from granules and a preparation process of the electromagnetic brake friction material in order to solve the problem that an existing electromagnetic brake friction plate is difficult to prepare or insufficient in performance. The reinforcing material comprises plasma modified aramid pulp, coupling modified composite mineral fibers, SiO2 coated tetrapod-like zinc oxide whiskers and carbon fiber-aluminum silicon whiskers; the filler comprises modified needle-like wollastonite and organic modified precipitated barium sulfate; the adhesive comprises boron-silicon synergistic modified phenolic resin and modified carboxy nitrile rubber. The raw materials are improved, and granules are prepared by adopting a mixing and crushing process, so that the content of an adhesive can be greatly reduced, meanwhile, the die filling efficiency can be improved, the die thickness and the high-temperature heat fading of the friction material can be reduced, a cold press molding process can be omitted, and the qualification rate of finished friction materials can be improved.

The invention belongs to the technical field of lithium ion batteries, and particularly relates to a self-repairing type lithium ion battery positive electrode adhesive, a preparation method, positive electrode slurry and a positive electrode plate. The adhesive comprises a mixed solvent, and a first copolymer serving as a main component and a second copolymer serving as a cross-linking agent are dissolved in the mixed solvent; the first copolymer is an acrylate-based multipolymer containing carboxyl or hydroxyl; the second copolymer is isocyanate terminated UPy functional polyurethane; the adhesive is in a liquid state at room temperature, when the adhesive is subjected to vacuum heat treatment at 60-180 DEG C, carboxyl or hydroxyl in main components of the adhesive reacts with isocyanate groups of a cross-linking agent to form amido bonds along with volatilization of a mixed solvent, and UPy groups are associated through quadruple hydrogen bonds to form dual dynamic cross-linking points. The method can effectively adapt to the volume change of the positive electrode material in the lithium removal / insertion process, and maintains the integrity of the electrode structure, thereby improving the cycling stability and rate capability of the lithium ion battery.

The invention belongs to the technical field of thin film capacitors, and particularly relates to a chemical grafting modified polypropylene capacitor film material and a preparation method and application thereof. According to the preparation method of the chemical grafting modified polypropylene capacitor film material, provided by the invention, diethylenetriamine ethyl acrylate with a plurality of specific groups such as amino groups and carboxyl groups and unsaturated double bonds is synthesized through esterification reaction, and the diethylenetriamine ethyl acrylate is introduced into a polypropylene material through chemical grafting to obtain chemical grafting modified polypropylene; the prepared polypropylene capacitor film material has the excellent properties of good compatibility, difficulty in film breakage, capability of adsorbing and removing residual moisture, difficulty in oxidation corrosion, excellent breakdown resistance and the like, and the preparation method is a preparation method of the high-performance polypropylene capacitor film material; therefore, the technical problem that a polypropylene capacitor film material prepared in the prior art is low in performance is solved.

The invention discloses a shielding protection adhesive tape for semiconductor integrated circuit packaging and a preparation method thereof, and relates to the technical field of semiconductor integrated circuit packaging. The shielding protective adhesive tape for packaging the semiconductor integrated circuit is prepared by taking polyimide as a base material and coating a coating, and the coating comprises the following raw materials in parts by weight: 3-5 parts of modified nano silicon dioxide, 30-40 parts of N, N-dimethylformamide, 1-3 parts of a curing agent and 1-3 parts of a curing agent. The invention discloses a high-temperature-resistant epoxy resin coating which is prepared from the following components in parts by weight: 25-30 parts of N, N-dimethylformamide, 25-30 parts of a modified acrylate copolymer, 17-26 parts of ethyl acetate, 12-15 parts of epoxy resin, 1-2 parts of a silane coupling agent KH-550, 0.5-1 part of an antioxidant 1010, 0.3-0.8 part of an ultraviolet absorbent UV-327, 1-2 parts of carboxyl-terminated nitrile rubber, 2-4 parts of decabromodiphenyl ether, 0.1-0.3 part of an organic siloxane defoaming agent, 0.2-0.5 part of an acrylate flatting agent and 10-11 parts of diaminodiphenyl sulfone. The adhesive tape contains the modified nano silicon dioxide, the modified acrylate copolymer and other components, so that the performance of the adhesive tape is guaranteed; pretreatment is meticulous, preparation steps are standard, and mass production is easy; a finished product can be effectively shielded, and the packaging yield and the product stability can be improved.

The invention discloses an amphiphilic chitosan and plant nanocellulose composite coating fresh-keeping material, which is prepared from the following ingredients in percentage by mass: 0.5 to 20 percent of amphiphilic chitosan, 0.1 to 5.0 percent of plant nanocellulose, 0.5 to 10.0 percent of coalescing agents, 0.1 to 3.0 percent of antioxidants and the balance deionized water. Wherein the amphiphilic chitosan is prepared from chitosan, quaternary phosphonium salt and sorbic acid. Amphipathic chitosan of the material has hydrophilic groups such as amino and carboxyl and a sorbate hydrophobic group, has hydrophilicity and hydrophobicity at the same time, and is extremely easy to combine with substances such as a coalescing agent, plant nanocellulose and an antioxidant to form a stable polymeric membrane layer, so that the mechanical property after membrane formation is remarkably improved, and the material has a good application prospect. Meanwhile, the plant nanocellulose particles can be stably coated in the polymeric membrane material layer, so that the mechanical property of the material is enhanced, and lasting and efficient antibacterial and antioxidant effects are realized. The invention further discloses a preparation method and application of the amphiphilic chitosan and plant nanocellulose composite coating fresh-keeping material.

The invention relates to a dispersing agent for garnet type solid electrolyte and a preparation method thereof, a special powder dispersing agent for dispersing garnet type solid electrolyte (LLZO, Li7La3Zr2O12) in an ethanol or isopropanol system is a polycarboxylic acid-polyether colorless transparent viscous liquid copolymer, and the copolymer is anchored on the surface of powder particles through the strong adsorption effect of carboxyl, so that the dispersing agent can be used for dispersing the garnet type solid electrolyte (LLZO, Li7La3Zr2O12) in an ethanol or isopropanol system. Meanwhile, the polyether chain segment realizes solvent compatibility and steric hindrance effect, the preparation method for the dispersing agent is a controllable free radical polymerization method and specifically comprises dozens of specific steps and conditions, and the dispersing agent has the advantages that the grinding particle size of the garnet type solid electrolyte can be effectively reduced, stable dispersion of powder in slurry is realized, and the dispersing effect is good. Powder agglomeration is inhibited, and the grinding efficiency is improved, so that the mass production requirement of the high-safety solid-state lithium ion battery is met.

The invention provides a self-repairing hydrated salt phase change microcapsule as well as a preparation method and application thereof, and belongs to the field of phase change materials. The preparation method comprises the following steps: preparing a hydrated salt phase change material and sorbitol into eutectic melt by adopting a melting method; strontium carbonate, sorbitol grafted nano titanium dioxide, SiO2-coated silicone rubber microspheres, hollow Al2O3 microspheres, tannic acid microcapsules, alpha-zirconium phosphate, melamine polyphosphate, diethyl aluminum hypophosphite, carboxylated multi-walled carbon nanotubes, polydopamine modified boron nitride nanosheets and hydrophilic fumed silica are added into the eutectic melt, and blending is performed to obtain a core material; The preparation method comprises the following steps: adding strontium carbonate, sorbitol grafted nano titanium dioxide, SiO2-coated silicone rubber microspheres, hollow Al2O3 microspheres, tannic acid microcapsules, alpha-zirconium phosphate, melamine polyphosphate, diethyl aluminum hypophosphite, carboxylated multi-walled carbon nanotubes, polydopamine modified boron nitride nanosheets and hydrophilic fumed silica into the eutectic melt; bio-based polyurethane-polyurea is used as a shell material, the core material is coated in the shell to prepare the microcapsule, and the temperature of the coating operation is not higher than the phase change temperature of the hydrated salt phase change material; the surface is coated with a super-hydrophobic coating. According to the invention, a solid filler system is constructed, and a low-temperature preparation process is combined, so that the phase-change microcapsule with high performance, high reliability and high safety is developed.

The invention relates to the technical field of plastic material preparation, and discloses a modified bamboo fiber, a PBAT composite material and a plastic object. The modified bamboo fiber comprises bamboo fiber subjected to hot pressing treatment in water and a closed aziridine cross-linking agent loaded on the bamboo fiber, and the mass ratio of the bamboo fiber subjected to hot pressing treatment in water to the closed aziridine cross-linking agent is 100: (1-10). The PBAT composite material comprises the following components in parts by weight: PBAT and modified bamboo fibers, and the mass ratio of the PBAT to the modified bamboo fibers is 100: (20-40). The modified bamboo fiber is subjected to hot pressing treatment in water, so that the generation of volatile gas caused by high-temperature processing can be avoided when the modified bamboo fiber is applied to the plastic material, and the interface interaction with the plastic material can be improved; the closed aziridine cross-linking agent can release active groups at high temperature, and can react with active functional groups such as hydroxyl and carboxyl on the surfaces of the bamboo fibers and the surfaces of the plastic materials, so that the interface interaction between the bamboo fibers and the plastic matrix is improved, and the tensile strength of the composite material is improved.

The invention relates to the technical field of research and development of BIB liquid packaging materials, and discloses a PE-PA-based composite film, a manufacturing process and an application in BIB liquid packaging, and specifically comprises the following steps: synthesizing a PE-PA compatilizer; the preparation method comprises the following steps: carrying out ring-opening reaction on an epoxy functional group of a PE-PA compatilizer and an amino functional group or a carboxyl functional group at a PA resin molecular chain end to prepare PE-PA compatilizer grafted nylon resin, and carrying out physical anchoring action on a long-chain alkane structure on the PE-PA compatilizer grafted nylon resin and a PE resin molecular chain to prepare the PE-PA alloy master batch; low-density polyethylene resin is used as a raw material of a supporting layer, PE-PA alloy master batch is used as a raw material of a functional layer, metallocene polyethylene resin is used as a raw material of a heat sealing layer, a three-layer co-extrusion blow molding film forming technology is adopted, the PE-PA composite film is prepared, and the film product is excellent in comprehensive performance and can be used for manufacturing a BIB bag body.

The invention relates to the technical field of polyester fibers, and discloses a preparation method of antibacterial modified polyester hollow fibers, which comprises the following steps: by taking nitrilotriacetic acid, thionyl chloride, epoxy chloropropane, eugenol and the like as raw materials, carrying out acylating chlorination reaction, quaternization reaction and esterification reaction to obtain eugenol epoxy quaternary ammonium salt. The preparation method comprises the following steps: carrying out ring-opening reaction on carboxyl groups in graphene oxide and epoxy groups in eugenol epoxy quaternary ammonium salt to obtain modified graphene, uniformly mixing the modified graphene with polyethylene glycol terephthalate, and carrying out a series of steps to finally obtain the antibacterial modified polyester hollow fiber. Eugenol and quaternary ammonium salt are utilized to improve the antibacterial property of the polyester hollow fiber, and graphene is utilized to improve the mechanical property of the polyester hollow fiber. The polyester hollow fiber prepared by the invention has excellent mechanical properties and antibacterial properties.

The invention relates to the technical field of conductive materials, in particular to a high-concentration dispersion system and a preparation method thereof. The high-concentration dispersion system comprises a conductive agent, a dispersing agent, a solvent and a viscosity reduction auxiliary agent, the conductive agent is modified carbon nanotubes, the dispersing agent is modified polyvinylpyrrolidone, the solvent is N-methyl pyrrolidone or deionized water, and the viscosity reduction auxiliary agent is piperazine anhydrous; wherein the modified carbon nano tube is obtained by mixing and heating a carbon nano tube and a mixed acid solution of nitric acid and sulfuric acid, then cooling, filtering, washing, drying, then dispersing in 75% ethanol, and finally adding 3-[3-carboxyl allylamido] propyltriethoxysilane for modification; the modified polyvinylpyrrolidone is obtained by heating polyvinylpyrrolidone at 310-330 DEG C and then oxidizing the polyvinylpyrrolidone. The conductive agent content of the high-concentration dispersion system is high, the conductive agent accounts for 15%-20% of the high-concentration dispersion system by mass, and the high-concentration dispersion system is low in viscosity, high in dispersity and good in conductivity.

According to the method for recycling the waste lithium ion battery positive electrode material aluminum foil, double-bond addition is conducted on ureido of allylurea and maleimide, meanwhile, thiazolecarboxylic acid amino cyclization is conducted, ternary heterocyclic molecules containing ureido, thiazole rings and carboxyl are generated, S atoms, N atoms and O atoms form tridentate coordination sites, and the leaching rate of aluminum is increased.

Provided is a porous separator selected from (a) to (c). (a) Porous membranes containing hydrophilic inorganic particles, an aromatic porous support, and an organic polymer including a hydrophilic organic polymer that has a sulfo group and / or a carboxy group and has an acid value of 0.3 mmol / g or higher; (b) porous membranes containing no porous support and containing hydrophilic inorganic particles and an organic polymer including a hydrophilic organic polymer that has a sulfo group and / or a carboxy group and has an acid value of 0.3 mmol / g or higher, the hydrophilic inorganic particle content of said porous membranes being 10 mass% or greater; (c) porous membranes containing no hydrophilic inorganic particles and containing an aromatic porous support and an organic polymer including a hydrophilic organic polymer that has a sulfo group and / or a carboxy group and has an acid value of 0.3 mmol / g or higher.

The invention belongs to the technical field of lithium ion batteries, and discloses a carboxyl-containing copolyimide binder, a lithium ion battery silicon negative electrode, a lithium ion battery and a preparation method, and polyamide acid is prepared by using a carboxyl-containing diamine monomer, an amino-terminated long aliphatic chain diamine monomer and an anhydride monomer as raw materials; and carrying out chemical imidization, precipitation and washing on the polyamide acid to obtain the carboxyl-containing copolyimide binder. The prepared carboxyl-containing copolyimide binder has good solubility in a conventional electrode manufacturing solvent, and the solution system of the obtained carboxyl-containing copolyimide binder is uniform and stable. When the carboxyl-containing copolyimide binder is applied to preparation of a silicon negative electrode of a lithium ion battery, the carboxyl-containing copolyimide binder can generate dual covalent interface interaction with silicon active material particles and conductive material particles, so that the migration efficiency of lithium ions in an electrode system is remarkably improved, the transmission dynamics performance is enhanced, and the high-rate charge-discharge capacity of the battery is effectively improved.

The invention discloses a high-strength modified polyethylene composite fiber and a preparation method thereof, and belongs to the technical field of fiber materials, carboxylated mesoporous silica microspheres are used as a matrix, the surface of the matrix is coated with a graphene sheet layer, then hydroxyethyl methylacrylate is grafted, functionalized graphene / mesoporous silica microspheres are obtained, the functionalized graphene / mesoporous silica microspheres are used as a filler, and the high-strength modified polyethylene composite fiber is prepared. When the polyethylene composite fiber is applied to a ship cable, the overall weight of the ship cable can be reduced, and relative slippage can be generated between graphene lamellas and mesoporous silica microspheres, so that stress is dispersed, and the strength of the polyethylene composite fiber is improved; a hydrophobic alkane long chain is introduced through esterification of the graphene / mesoporous silica microspheres and hydroxyethyl methylacrylate and graft modification of hydroxyethyl methylacrylate, so that the hydrophobic alkane long chain has good compatibility with white oil, and the microspheres are prevented from approaching and gathering by a steric hindrance effect, so that the hydrophobic alkane long chain is more uniformly and stably dispersed in the white oil.

The invention discloses a preparation method and application of self-crosslinking hydrogel containing a capsaicin functional structure, and belongs to the technical field of dye adsorption materials. The capsaicin functional structure monomer is introduced into an acrylic acid system, so that the self-crosslinking of the hydrogel is realized, and meanwhile, the adsorption performance of the hydrogel is remarkably improved; mono-substituted capsaicin functional structure monomers containing carboxyl and sulfonic acid groups are used as components, a disubstituted capsaicin functional structure monomer with polyhydroxy and carboxyl is used as a cross-linking agent, the self-crosslinking hydrogel with multiple adsorption sites is successfully constructed through free radical polymerization, and the adsorption capacity and efficiency of the hydrogel are greatly improved. The hydrogel-based carbon material is obtained by carbonizing the self-crosslinking hydrogel containing the capsaicin functional structure, the adsorption performance of the hydrogel material is further improved, the obtained hydrogel-based carbon material can be desorbed and recycled in ethyl alcohol, and the service life of the hydrogel-based carbon material is prolonged. And the problem of secondary pollution of the existing hydrogel material in the acid / alkali desorption process is effectively avoided.

The invention discloses inorganic modified core-shell structure water-based outdoor wood paint, a preparation method and a film forming method. The preparation method comprises the following steps: S1, pre-dispersing a GO-TiO2-ZnO composite material modified by a silane coupling agent KH570; s2, uniformly stirring the GO-TiO2-ZnO composite material modified by KH570, an acrylic acid core-shell emulsion, dipropylene glycol monomethyl ether, bentonite and an organic silicon flatting agent, and adjusting the pH (Potential of Hydrogen) of the materials to 8.0 to 8.5; and filtering to obtain the target inorganic modified core-shell structure water-based outdoor wood paint. A GO-TiO2-ZnO composite material modified by a silane coupling agent KH570 is dispersed in a self-crosslinking acrylic core-shell emulsion, an alkaline material effectively enhances formation of a high-bond-energy bidentate chelate ([R-COO] 2Zn < 2 + >) with resin carboxyl through ZnO loaded on GO, water molecule permeation channels are reduced, ultraviolet light is shielded in situ in cooperation with TiO2, and the water-resistant service life of an obtained film layer is long.

The invention relates to the technical field of optical cement, in particular to high-temperature-resistant acrylic optical cement with high light transmittance and a preparation method of the high-temperature-resistant acrylic optical cement. The preparation method of the high-light-transmittance high-temperature-resistant acrylic optical adhesive comprises the following steps: (1) under the protection of inert gas, mixing an acrylate monomer, a carboxyl-containing monomer, an epoxy-containing monomer, a hydroxyl-containing monomer, a photoinitiator and modified inorganic nanoparticles, and stirring at 60-90 DEG C and 200-600rpm for 3-8 hours to obtain an adhesive solution; and (2) carrying out vacuum curing on the glue solution at 50-80 DEG C for 5-15 minutes to form a glue material, pressing the glue material into a film, and cooling to obtain the optical cement. The prepared high-temperature-resistant acrylic optical adhesive with high light transmittance has good light transmittance, high-temperature resistance and good peel strength, the light transmittance of the optical adhesive is larger than 90%, the heat-resistant temperature is larger than 150 DEG C, the peel strength is larger than 14 N / 25 mm, and the peel strength after high-temperature treatment is larger than 11.8 N / 25 mm.

The invention relates to the field of copper-clad plates, and discloses a high-performance flame-retardant low-dielectric-loss copper-clad plate and a preparation method thereof.The copper-clad plate comprises epoxy resin, benzoxazine resin, composite filler, carboxyl-terminated nitrile rubber, an active diluent, a curing agent and the like; the composite filler is prepared by compounding flame-retardant modifier grafted graphene oxide and epoxy silane modified silicon dioxide hollow spheres; according to the flame-retardant modifier, boric acid and pentaerythritol are used for preparing a double-terminal hydroxyl boron-containing intermediate, then dichlorodiphenyl silane and phenylphosphonic dichloride react with hydroxyl groups at the two ends of the intermediate to prepare a flame-retardant intermediate, and amino silane and vanillic aldehyde react with chlorine atoms at the two ends of the intermediate to prepare an aldehyde modified flame-retardant intermediate; the copper-clad plate prepared by the preparation method disclosed by the invention is low in dielectric constant and dielectric loss, high in heat conductivity coefficient and good in flexibility, and also has excellent heat resistance and flame retardance.

The invention relates to the technical field of lithium battery diaphragms, in particular to a lithium battery diaphragm binder resistant to heat of 150 DEG C or above and a preparation method of the lithium battery diaphragm binder. A core-shell structure design is adopted, a core layer is formed by polymerizing an acrylate monomer, glycidyl methacrylate and an emulsifier, and a shell layer contains the acrylate monomer, styrene, an acrylamide monomer and beta-carboxyethyl acrylate. A high-temperature-resistant network structure is formed through a cross-linking reaction of an epoxy group of GMA and a carboxyl group of beta-CEA, and meanwhile, the hydrophilicity is reduced by using styrene and long-chain acrylate. The problems that a traditional binder is high in high-temperature shrinkage rate, high in hydrophilicity and difficult in two-component curing are solved, and the preparation method is suitable for production of the high-safety lithium battery diaphragm.

The invention relates to the technical field of in-vitro diagnostic kits, in particular to carboxyl polystyrene microspheres, a preparation method and application of the carboxyl polystyrene microspheres in a kit for quantitatively detecting MxA. The preparation method of the carboxyl polystyrene microspheres comprises the steps that firstly, polystyrene microspheres with the surface rich in aldehyde groups are prepared through a soap-free emulsion polymerization method; then carrying out a Schiff alkali reaction with 2-aminoethyl methacrylate hydrochloride to carry out double bond modification on the surface of the microsphere, and meanwhile, improving the hydrophilicity of the microsphere by an ester group and an imino group; and finally, carrying out sulfydryl-double bond addition reaction on the polystyrene microspheres and mercaptosuccinic acid to generate the polystyrene microspheres rich in carboxyl on the surfaces. The carboxyl polystyrene microspheres prepared by the invention can improve the binding efficiency of latex and an MxA antibody, so that the detection sensitivity is improved, the purpose of high-sensitivity quantitative detection of MxA protein can be achieved, and the detection time is greatly shortened.

The invention provides a preparation method and application of a dynamic covalent bond compatibilized thermoplastic blend, and relates to the technical field of high polymer materials, the method comprises the following steps: (1) carrying out melt blending on at least two incompatible or partially compatible thermoplastic polymer blends, a reaction reagent containing acid anhydride or carboxyl groups, an initiator and an auxiliary agent according to a mass ratio of 100: (0.5-12): (0.05-1.5): (0.5-12), carrying out reactive extrusion to obtain a grafted modified material; and (2) carrying out melt blending on the grafted modified material, a cross-linking agent containing an epoxy group or a hydroxyl group and a catalyst according to a mass ratio of 100: (1-20): (0.1-5), and carrying out reactive extrusion to form a dynamic covalent bond network so as to obtain the compatibilization blend. According to the invention, the compatibility and mechanical properties of the thermoplastic blend are improved, and the problems of high recovery cost, complex recovery technology, serious plastic pollution and the like of the waste thermoplastic plastic blend in real life are solved.

The invention relates to the technical field of adhesive tapes, and particularly discloses a UV (ultraviolet) visbreaking anti-acid adhesive tape for thinning flexible glass and a preparation process of the UV visbreaking anti-acid adhesive tape. A UV viscosity-reducing acid-resistant adhesive tape for thinning flexible glass comprises a base material layer, a pressure-sensitive adhesive layer and a release film layer which are stacked in sequence, and the pressure-sensitive adhesive layer is prepared from the following raw materials: 85-120 parts by mass of an acrylate copolymer, 3-5 parts by mass of a cross-linking agent, 1.5-2.5 parts by mass of a photoinitiator, 2-5 parts by mass of an acid-resistant nano filler and 0.2-0.4 part by mass of an amine catalyst; the acrylate copolymer is prepared from the following raw materials in parts by mass: 20-30 parts of an imidazolinyl-containing monomer, 15-25 parts of a large-steric-hindrance alkyl-containing monomer, 45-55 parts of a flexible monomer and 5-10 parts of a carboxyl-containing monomer. The UV visbreaking acid-resistant agent prepared by the invention has relatively good acid resistance and reliable UV visbreaking and high initial bonding balance.

The invention relates to the technical field of alloys, and discloses a high-strength silver-copper alloy and a preparation method thereof. The acidified carbon nanotubes are subjected to functional modification, methylbenzene-2, 4-diisocyanate reacts with surface active groups of the methylbenzene-2, 4-diisocyanate to introduce-NCO groups, then through hydroxyl reaction of-NCO and 4-hydroxyphthalic acid, a plurality of carboxyl groups are grafted on the surfaces of the carbon nanotubes, the carboxyl groups can firmly adsorb lanthanum nitrate through a coordination effect, and meanwhile, the carboxyl groups can also adsorb lanthanum nitrate through a coordination effect. The rare earth elements are prevented from being separated from the raw materials in the ball milling process, uniform distribution is ensured, the agglomeration tendency of the carbon nanotubes can be reduced, and the dispersity of the carbon nanotubes in the silver-copper alloy is improved; the carbon nanotubes have extremely high axial strength and excellent conductivity, the mechanical and electrical properties of the alloy material can be enhanced through load transfer and a conductive network effect, rare earth lanthanum is segregated at a grain boundary to form a pinning effect to refine grains, the alloy strength is further improved, and finally collaborative improvement of the strength and the conductivity of the silver-copper alloy is achieved.

The invention discloses a highly permeable lawn and a preparation method thereof, the highly permeable lawn comprises artificial grass yarns, gum and a base layer, the artificial grass yarns are woven on the base layer, the gum is arranged on the bottom surface of the base layer, the artificial grass yarns and the base layer are fixed, the gum comprises latex, a calcium carbonate filler, a foaming agent and a cross-linking agent, the glass transition temperature Tg of the latex is 10-40 DEG C, the foaming agent is a foaming agent, and the cross-linking agent is a cross-linking agent. The latex comprises carboxylic butadiene-styrene latex and ethylene-vinyl acetate copolymer latex; the latex comprises the following components in parts by mass: 60-90 parts of carboxylic butadiene-styrene latex and 10-40 parts of ethylene-vinyl acetate copolymer latex. The base layer in the artificial turf is improved, the porous breathable gum is prepared, it is ensured that the mechanical property of the artificial turf meets the requirement, and the high water permeability of the artificial turf is achieved under the condition that drainage holes are not punched.

To provide a pressure-sensitive adhesive sheet capable of suppressing heavy peeling even when using an aqueous pressure-sensitive adhesive composition.SOLUTION: A pressure-sensitive adhesive sheet according to an embodiment of the present invention includes: a base material; and a pressure-sensitive adhesive layer formed of a water-dispersible pressure-sensitive adhesive composition containing a water-dispersible polymer, wherein a surface concentration of a carboxyl group on a surface of the pressure-sensitive adhesive layer obtained by an X-ray photoelectron spectroscopy (ESCA) gas phase chemical modification method is a detection limit value or less.SELECTED DRAWING: Figure 1

The invention discloses a lignin-inorganic oxide composite binder, preparation thereof and application of the lignin-inorganic oxide composite binder in a hard carbon negative electrode. The preparation method comprises the following steps: firstly, carrying out quaternization modification on lignosulfonate to obtain quaternized lignosulfonate, and then utilizing the action of quaternary ammonium and sulfonate of the quaternized lignosulfonate, hydroxyl and inorganic oxyacid radicals of inorganic nano oxide and carboxyl and hydroxyl of sodium carboxymethyl cellulose to prepare the modified lignosulfonate. The lignin-inorganic oxide composite binder with the interpenetrating network structure is formed. According to the binder, sodium carboxymethyl cellulose serves as a hard phase to enhance the mechanical rigidity, quaternized lignosulfonate rich in flexible long chains serves as a soft phase to bear part of loads, and inorganic nano oxide rich in hydroxyl serves as a crosslinking point or physical filler to enhance the structural stability of the binder. Besides, a multi-network structure formed by hydrogen bond crosslinking not only endows the binder with an excellent ion transmission rate, but also helps to enhance the interfacial compatibility of the binder with an ester electrolyte, thereby significantly improving the rate capability and cycle performance of the hard carbon negative electrode.

The present invention relates to the field of polyurethane materials and particularly to a temperature-induced color-changing vehicle film and a preparation method therefor. The method of the present invention comprises: firstly, using polyurethane to wrap vanadium dioxide powder to obtain color-changing microcapsules; then using 1,1,1,3,5,5,5-heptamethyltrisiloxane and 3-allyloxy-1,2-propanediol as raw materials to synthesize an organosilicon-modified diol, and enabling trimellitic anhydride to react with toluene diisocyanate to synthesize a dicarboximide compound; enabling the organosilicon-modified diol and the dicarboximide compound to undergo an esterification reaction and a polymerization reaction to obtain an organosilicon-modified imide polyester diol; then mixing the organosilicon-modified imide polyester diol with polytetrahydrofuran ether glycol 2000, and then enabling the mixture to react with toluene diisocyanate to obtain a polyurethane elastomer; and mixing the polyurethane elastomer, the color-changing microcapsules, a silane coupling agent, a plasticizer, an antioxidant, and an ultraviolet light absorber, followed by melt extrusion and blow molding into a film, so as to obtain the temperature-induced color-changing vehicle film.

The invention discloses an organic silicon composite solid defoaming agent for space station water treatment and a preparation method of the organic silicon composite solid defoaming agent, and relates to the technical field of defoaming agents. The organic silicon composite solid defoaming agent for space station water treatment comprises the following raw materials in parts by weight: 25-35 parts of polydimethylsiloxane, 5-10 parts of water-soluble silicone oil, 10-15 parts of white carbon black, 3-5 parts of an emulsifier, 3-4 parts of a dispersant and 25-35 parts of a carrier. The preparation method comprises the following steps: reacting 1H, 1H-perfluorohexylamine with epoxy chloropropane to generate an intermediate 1, reacting the intermediate 1 with lauryl amine to generate an intermediate 2, and reacting the intermediate 2 with amino-polyethylene glycol-carboxyl to obtain the emulsifier. The prepared organic silicon composite solid defoaming agent for space station water treatment has excellent defoaming and foam inhibition performance and good water dispersibility.

The invention is suitable for the technical field of material science and electrochemical energy, and provides a lyophilic polyolefin master batch and a preparation method and application thereof.The lyophilic polyolefin master batch is prepared from polyolefin, modified polyolefin, a cross-linking agent and a compatilizer, the modified polyolefin comprises polyolefin grafted with polar functional groups, and the cross-linking agent comprises a cross-linking agent and a compatilizer; the polar functional group can be selected from one or more of carboxyl, hydroxyl, amido, epoxy group, anhydride group, sulfonic acid group, cyano group and ether group, and the technical problem of poor lyophilic property of the polyolefin diaphragm is creatively solved by scientifically proportioning and compounding the modified polyolefin with the polar functional group, the common polyolefin, the cross-linking agent and the compatilizer. The components in the material system have a synergistic effect: the modified polyolefin provides lyophilic property, the cross-linking agent prevents the product from being degraded, the compatilizer improves the compatibility of the components and improves the polarity, and the comprehensive improvement of the performance of the diaphragm is realized through the combined effect.