309results about How to "Facilitate cross-linking" patented technology

The invention provides an asphalt-based closed-pore carbon material, a preparation method thereof and a sodium ion battery, the preparation method of the asphalt-based closed-pore carbon material comprises the following steps: S1, pre-oxidizing an asphalt-based carbon source in an oxidizing gas atmosphere at 200-350 DEG C to obtain a pre-oxidized product; s2, carrying out low-temperature carbonization on the pre-oxidized product in an inert atmosphere at 300-800 DEG C to obtain a first precursor; s3, performing gas activation on the first precursor in an activated gas atmosphere to obtain a second precursor; s4, performing chemical activation on the second precursor by adopting a chemical activating agent to obtain a porous carbon material; s5, dipping the porous carbon material in an asphalt solution, and then separating and drying to obtain a blank; and S6, carbonizing the blank under the protection of inert gas to obtain the asphalt-based closed-cell carbon material. The asphalt-based closed-cell carbon material has the advantages of high capacity, high first efficiency and high stable circularity.

The invention relates to the technical field of adhesives, and discloses an antibacterial mildew-proof water-based adhesive and a preparation method thereof. The preparation method of the antibacterial and mildew-proof water-based adhesive comprises the following steps: reacting 2, 2-dimethylolpropionic acid with castor oil to obtain hyperbranched bio-based polyol; modifying the hyperbranched bio-based polyol by using a modifier to obtain modified bio-based polyol; the preparation method comprises the following steps: preparing a waterborne polyurethane dispersion liquid by taking modified bio-based polyol, a hybrid modified BN / MOF composite material and hexamethylene diisocyanate as raw materials and 1, 4-butanediol as a chain extender; the preparation method comprises the following steps: mixing a waterborne polyurethane dispersion liquid, a wetting agent, a defoaming agent, a thickening agent and water to obtain a component A; an aliphatic curing agent is used as a component B; during use, the component A and the component B are mixed and stirred. The antibacterial and mildewproof water-based adhesive disclosed by the invention has excellent adhesion performance, water resistance, self-repairing performance and lasting antibacterial and mildewproof performance.

The invention relates to the field of concrete processing, and particularly discloses a preparation method of concrete crack self-repairing particles. Comprising the following steps: S1, activating bacillus pasteurii to obtain a bacterial suspension; s2, placing the adsorption particle modified fiber in a bacterial suspension for adsorption treatment to obtain a load material; and S3, uniformly spraying alkyd resin liquid on the surface of the load material, drying and dispersing to obtain a finished product. When new micro-crack damage is generated in the use process of the concrete, the microorganisms play a self-repairing role to fill cracks in the concrete, so that the strength of the concrete is maintained, the service life of the concrete is prolonged, and the durability of the concrete is improved.

The invention relates to a low-temperature curing polyimide precursor solution and a preparation method thereof. The method comprises the following steps: carrying out condensation polymerization reaction on a dianhydride monomer and a diamine monomer in a reaction solvent to obtain a polyamide acid solution; and adding an amino compound containing one or more special functional groups of pyridine, imidazole, quinoline, pyrimidine and azine into the polyamide acid solution, and fully stirring to enable amino in the compound to fully react with carboxyl in a polyamide acid molecular chain, thereby obtaining the polyimide precursor solution capable of being cured at low temperature. According to the preparation method, the curing temperature of polyimide can be greatly reduced, meanwhile, the mechanical property of the material can be improved, the thermal expansion coefficient can be reduced, and the preparation method can be used for preparing polyimide binders, photoresist, electronic packaging, resin, films, fibers and aerogel.

The invention provides a secondary sizing agent as well as a preparation method and application thereof. The secondary sizing agent comprises the following components: a main film-forming agent, an auxiliary film-forming agent, a lubricant, a silane coupling agent and water, wherein the main film-forming agent is an aqueous epoxy solution, the auxiliary film-forming agent comprises a low molecular weight epoxy emulsion and an aqueous polyurethane emulsion, and the lubricant comprises an organosilicon lubricant and an ionic lubricant. In the scheme, the secondary sizing agent formed by mixing the main film-forming agent, the auxiliary film-forming agent, the lubricant and the silane coupling agent with proper types and proper contents can endow the silicon carbide fiber with excellent wear resistance, folding resistance and mechanical properties. Compared with one-time sizing, the number of times of wear resistance of the fiber yarn is increased by more than 10 times, the yarn breaking rate in the fabric processing process is greatly reduced from 10% to 0.5%, the surface smoothness of the prepared fiber fabric is greatly improved, the performance of the composite material prepared through the impregnation method is integrally improved, the bending strength is obviously improved, and the performance requirement of the three-dimensional fabric can be completely met.

The invention relates to the technical field of oil field fracturing fluid, in particular to a preparation method of a high-temperature-resistant and anti-shearing organic boron-zirconium cross-linking agent. According to the technical scheme, the method comprises the following steps: 1) weighing deionized water and an alcohol stabilizer, adding the weighed deionized water and alcohol stabilizer into a reaction container, adding inorganic zirconium salt into the reaction container, and stirring until the inorganic zirconium salt is completely dissolved; 2) adding an organic ligand, stirring to dissolve the organic ligand, and continuously stirring for 0.5 hour; (3) adding a complexing agent, heating to 50-70 DEG C, stirring and keeping the temperature for 11-15 hours to obtain an organic zirconium cross-linking agent; and 4) adding the organic zirconium cross-linking agent obtained in the step 3) and a boron compound into a reaction container according to a ratio, and stirring at room temperature until the organic zirconium cross-linking agent and the boron compound are completely dissolved so as to obtain the organic boron zirconium cross-linking agent, and the preparation method has the beneficial effects that the prepared cross-linking agent has excellent temperature resistance and shear resistance, and is simple and convenient to operate, mild in condition, wide in raw material source and low in price.

The invention belongs to the technical field of building materials, and discloses a non-asphalt-based non-curing waterproof coating as well as a preparation method and application thereof. The waterproof coating comprises the following components: liquid resin, a thermoplastic elastomer modifier, a rubber modifier, a cross-linking agent, an accelerant, a filler, a chemical root inhibitor, a plasticizer, a dispersant, and at least one of optional pigment, a resin modifier, an antioxidant and a deodorant. The non-asphalt-based non-curing waterproof coating disclosed by the invention has high extensibility and thermal aging resistance.

The invention relates to the technical field of thickening agents, in particular to a thickening agent for fracturing fluid and a preparation method of the thickening agent, the thickening agent comprises a liquid material and a solid material, the mass ratio of the liquid material to the solid material is 1: (2.2-2.4), and the liquid material is composed of deionized water and N-methyl pyrrolidone. According to the preparation method disclosed by the invention, the konjaku flour is added in the preparation of the thickening agent, and after the konjaku flour is subjected to mixing reaction and curing treatment, amino functional groups in konjaku molecules can be subjected to cross-linking reaction with aldehyde groups of glutaraldehyde, so that water molecules are wrapped in a cross-linked network structure, and the internal friction force during fluid flowing is increased; and hydroxyl groups on molecular chains of the konjac glucomannan and aldehyde groups of glutaraldehyde are subjected to a condensation reaction to form covalent bonds, so that a cross-linking effect is achieved, a stable chemical cross-linked network structure is formed among the molecular chains of the konjac glucomannan, and the cross-linking performance of the thickening agent is effectively improved.

The invention discloses a high-strength wear-resistant composite plastic with high auxiliary material content and a preparation method thereof, belongs to the technical field of plastic processing, and aims to solve the technical problem that the wear resistance and strength of the composite plastic in the prior art need to be further improved. The composite plastic comprises the following components in parts by weight: 40-50 parts of a plastic matrix, 15-20 parts of a modified plasticizer, 10-15 parts of a modified filler, 3-5 parts of a stabilizer, 3-5 parts of an antioxidant, 3-5 parts of an ultraviolet light absorber and 3-5 parts of a lubricant. The modified plasticizer absorbs harmful gas generated by resin pyrolysis and hybridizes a resin chain segment, flame-retardant groups in the modified filler promote carbonization and enhance the flame retardance of the material during combustion, the coupling agent components of the modified plasticizer and the modified filler improve the compatibility of auxiliary materials, and finally the high-strength, wear-resistant, tensile and flame-retardant environment-friendly composite plastic is obtained.

The invention relates to three-dimensional modified polyvinyl alcohol hydrogel as well as a preparation method and application thereof, and relates to the technical field of evaporation materials, few layers of FLG and alpha type Bi2O3 are doped in polyvinyl alcohol hydrogel, and Ppy vapor deposition is performed on the surface of the hydrogel to obtain the three-dimensional modified polyvinyl alcohol hydrogel 3D-PVA coated Bi2O3-FLG / Ppy PEMs. After the material prepared by the method is finally optimized, the evaporation rate reaches 4.03 kg / (m < 2 >. H), meanwhile, the stable evaporation rate of 3.06 kg / (m < 2 >. H) is shown in an evaporation experiment for simulating northern sea water polluted by methylene blue dye, and the degradation effect on pollutants in evaporated water reaches 81% in an illumination experiment. The material prepared by the method not only has high evaporation rate in seawater desalination application, but also shows great potential and application prospect in treatment of seawater polluted by organic dye.

The invention relates to the field of high polymer materials, and particularly discloses an EVA and rubber blended antistatic sole material and a preparation method thereof. The EVA and rubber blended antistatic sole material is prepared from the following raw materials in parts by weight: 70 to 80 parts of a main material, 20 to 30 parts of rubber, 1 to 1.5 parts of dicumyl peroxide, 15 to 20 parts of filler, 10 to 15 parts of an antistatic agent, 0.8 to 1.2 parts of zinc stearate, 4.5 to 5.5 parts of a foaming agent, 1.5 to 3 parts of a foaming aid and 0.5 to 1 part of an antioxidant, the main material comprises POE (Polyolefin Elastomer), LDPE (Low-Density Polyethylene) and an ethylene-vinyl acetate copolymer in a mass ratio of 1: (1-1.5): ( The antistatic agent is prepared from graphene, 2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexane and triallyl isocyanurate. The blended sole material has the advantages of being low in density, light and convenient to wear, lasting in antistatic effect and high in wear resistance.

The invention relates to the technical field of coating preparation, and discloses a self-drying impact-resistant protective coating and a preparation method thereof. The invention discloses a self-drying impact-resistant protective coating. Comprising the following components: acrylic resin, epoxy resin, modified polyurethane emulsion, glyceryl stearate, a styrene-butadiene-styrene block copolymer, modified tackifying resin, deionized water, ethylene glycol tert-butyl ether, ethanol, an organic silicon defoaming agent, an organic silicon flatting agent and an impact modifier methyl methacrylate-butadiene-styrene copolymer. The coating is prepared from polyurethane elastomer particles, organic bentonite, black paste and isocaprylic acid. The self-drying impact-resistant protective coating disclosed by the invention not only has excellent mechanical property, impact resistance, corrosion resistance, wear resistance and ultraviolet resistance, but also has self-healing property and antibacterial property.

The invention relates to the technical field of preparation of heat-conducting silica gel sheets, and discloses a high-heat-conductivity heat-conducting silica gel sheet which comprises the following raw materials in parts by weight: 90 parts of silicone rubber, 40-50 parts of heat-conducting filler, 1-5 parts of a reinforcing agent, 1-3 parts of an anti-aging agent, 1-3 parts of an antioxidant, 2-3 parts of a cross-linking agent, 3-6 parts of a flame retardant and 1-2 parts of a catalyst. The silicon rubber is organic silicon rubber; the heat-conducting filler is graphite and aluminum oxide, and the ratio of the graphite to the aluminum oxide is 1: 2. When the heat-conducting silica gel sheet is prepared, the mechanical property and the heat resistance of the heat-conducting silica gel sheet can be improved by adding the reinforcing agent, and the weather resistance and the aging resistance of the heat-conducting silica gel sheet can be enhanced by the anti-aging agent, so that the heat-conducting silica gel sheet can be used outdoors or in a severe environment; by using the antioxidant, the oxidation resistance of the heat-conducting silica gel sheet can be improved, the service life of the heat-conducting silica gel sheet can be prolonged, and by using the flame retardant, the flame retardance of the heat-conducting silica gel sheet can be improved, and the safety of the heat-conducting silica gel sheet at high temperature is ensured.

The invention relates to wear-resistant printing paste, cloth and a preparation method thereof. The invention provides wear-resistant printing paste on the first aspect. The wear-resistant printing paste is prepared from 60%-70% of waterborne polyurethane, 5%-15% of waterborne organic silicon resin, 5%-10% of waterborne silica sol, 4%-8% of modified microspheres and 1%-3% of fine fibers. Different from the prior art, the wear-resistant printing paste with a specific component content formula provided by the technical scheme forms a wear-resistant printing coating which takes fine fibers to support a spatial framework, takes modified microspheres to fill the spatial framework to provide elastic buffering and takes waterborne polyurethane and waterborne organic silicon resin as main bodies; the water-based silica sol can further connect the modified microspheres and the resin, so that the crosslinking property and compactness of the coating are improved, and the coating achieves more stable and wear-resistant effects.

The invention provides a method for preparing a biological organic fertilizer through plant straw fermentation, and belongs to the technical field of organic fertilizers. The method comprises the steps of plant straw pretreatment, fermentation solid preparation, bacteriostatic active ingredient preparation, functional additive preparation and fermentation. The fermentation comprises the following steps: stacking pretreated plant straws, fermentation solids and a functional additive for fermentation, carrying out first turning when the temperature in a pile reaches 52-56 DEG C, turning once every 18-21 hours, stopping turning after turning twice, standing until the temperature in the pile is reduced to 30-34 DEG C, adding fulvic acid, diammonium phosphate, ammonium chloride, calcium superphosphate and magnesium sulfate, uniformly mixing, and fermenting again, turning the pile once every 15-17h, and after turning the pile twice in total, finishing fermentation, and granulating and drying to obtain the biological organic fertilizer. The biological organic fertilizer prepared by the method disclosed by the invention is low in harmful pathogen content, short in fermentation period, stable in effect and excellent in application effect.

The invention provides a preparation method of a flexible hydrogen delivery pipe, and relates to the field of flexible hydrogen delivery pipe manufacturing, and the flexible hydrogen delivery pipe comprises the following raw material components: polytrifluorochloroethylene, nylon 11, polyvinylidene fluoride, a micro-nano carbon material, polyethyleneimine, a compatilizer, a cross-linking agent, an antioxidant, a dispersing agent and a light stabilizer, the cross-linking agent is a thermoplastic polyurethane copolymer, the micro-nano carbon material comprises graphene oxide and graphene nanoplatelets, the dispersing agent is one of EBS, EB-G and PE wax, the antioxidant is antioxidant 1076, and the light stabilizer is one of benzophenone and 2-hydroxybenzoate; the gas barrier material has the advantages of being good in gas barrier property and high in mechanical property on the whole.

The invention discloses a composite plasticizer for a high and low temperature resistant cable and a preparation method of the composite plasticizer, belongs to the technical field of plasticizers for cables, and aims to solve the technical problem that the high and low temperature resistance and the ultraviolet resistance of a composite plasticizer for a cable in the prior art need to be further improved. The preparation method comprises the following steps: uniformly mixing 30-50 parts by weight of a main plasticizer, 20-40 parts by weight of an auxiliary plasticizer, 20-40 parts by weight of an auxiliary material and 60-70 parts by weight of a solvent to obtain a composite plasticizer, preparing a citric acid copolymer and modified chloroprene rubber, and crosslinking the citric acid copolymer and the modified chloroprene rubber to obtain the main plasticizer; an auxiliary plasticizer is prepared through reaction of epoxidized soybean oil and a functional cross-linking agent, and the auxiliary plasticizer is further mixed with an auxiliary material and a solvent to obtain the composite plasticizer capable of enhancing wear resistance, high and low temperature resistance, ultraviolet resistance and toughness of the cable material.

The invention relates to a carbon fiber sizing agent, a preparation method of the carbon fiber sizing agent, sized carbon fiber and a preparation method of the sized carbon fiber, and belongs to the technical field of carbon fiber sizing agents. The carbon fiber sizing agent comprises benzoxazine resin, amino modified resin, an emulsifier and a solvent. The benzoxazine resin is used as a main raw material, and the amino-modified resin is introduced, so that when the sizing agent is used for sizing carbon fibers, the benzoxazine resin can be subjected to a grafting cross-linking reaction with the amino-modified resin at a high temperature, and the benzoxazine resin can be subjected to epoxy ring-opening polymerization to form a self-cross-linking reaction. The cross-linking reactions can improve the heat resistance and the interface performance of the sizing agent, so that the interface performance of a composite material formed by the carbon fibers and a resin matrix is effectively enhanced.

The invention provides a dopamine hybrid ligand ZIF-8 / gelatin composite aerogel and a preparation method and application thereof, and belongs to the field of composite aerogel and preparation thereof.The growth rate of ZIF-8 nanocrystals is accurately controlled through dopamine hybrid coordination metal ions, stable ZIF-8-DA hybrid crystals are formed, and the stability of the aerogel is improved. The crystal not only solves the problem that the traditional MOF material is easy to aggregate particles, but also retains abundant chemical functional groups; furthermore, the ZIF-8-DA and a gelatin matrix are compounded by adopting a multi-crosslinking strategy and a freeze-thaw treatment technology to obtain the composite aerogel with a unique three-dimensional porous microstructure, so that the mechanical strength and the structural stability of the composite aerogel are remarkably improved, and the composite aerogel shows better heat-insulating and flame-retardant properties; the composite aerogel material prepared by the scheme has excellent heat insulation and flame retardant properties, and is suitable for high-energy-consumption fields such as building energy conservation, industrial heat management and environmental flame retardance.

The invention relates to the technical field of high-performance protective composite materials, in particular to a novel hybrid fiber composite material and a preparation method and application thereof.The novel hybrid fiber composite material comprises an energy buffer layer, a shear protective layer, a tensile reinforcing layer and a deformation energy absorption layer which are sequentially stacked, the energy buffer layer is made of a tough aramid fiber-ultra-high molecular weight polyethylene fiber / TPU composite material, the shear protection layer is made of a high-performance carbon fiber / TPU composite material, the tensile enhancement layer is made of a tough aramid fiber / TPU composite material, and the deformation energy absorption layer is made of a tough ultra-high molecular weight polyethylene fiber / TPU composite material. The novel hybrid fiber composite material has the advantages of light weight, high strength, good wear resistance and good protection performance, and has wide application prospects and market values in the fields of aerospace structural members, high-end equipment, protection devices and the like needing to bear high stress, high impact and complex loads.

The invention belongs to the technical field of polyurethane coatings, and provides a cellulose nanocrystal enhanced heat-insulating bio-based polyurethane coating and a preparation method thereof, according to the coating, porous cellulose nanocrystals are introduced, and a silicon dioxide film is deposited on the surfaces of the porous cellulose nanocrystals, so that the heat-insulating property, weather resistance and mechanical property of the material are remarkably improved. The castor oil adopted as a bio-based raw material has the advantages of being renewable and environmentally friendly, and the defects of a traditional petroleum-based polyurethane material in the aspects of environmental protection and resource consumption are overcome. Through epoxidation treatment on castor oil, the reaction activity and hydroxyl density of the material are increased, and further fluorination and silanization modification are performed, so that the hydrophobicity, chemical stability and surface energy reduction effect of the coating are effectively improved; the prepared bio-based polyurethane coating has excellent mechanical properties, long-acting weather resistance and an excellent heat reflection effect.

The invention discloses transparent bio-based nylon resin and a preparation method thereof. The preparation method comprises the following steps: carrying out salt forming reaction on bio-based pentamethylene diamine, terephthalic acid and isophthalic acid to obtain nylon 5T and 5I mixed salt; the nylon 5T and 5I mixed salt is subjected to a prepolymerization reaction under the action of a catalyst, and a prepolymer of nylon 5T and 5I is obtained; adding the obtained prepolymer and a nucleating agent into a tubular reactor for final polymerization reaction to obtain transparent nylon resin; the obtained transparent nylon resin is pressurized and introduced into an extruder, a tackifier and a first compatilizer are added for solid-phase tackifying, then traction bracing is conducted, the transparent nylon resin is introduced into a granulator for granulation, and the transparent bio-based nylon resin slices are obtained after drying. The invention solves the problems that the polymerization temperature cannot be accurately controlled, the transparent nylon has poor stability and is easy to oxidize and yellow, and the polymer is easy to block the reaction equipment after the molecular weight is increased.

The invention discloses a nitrile rubber composition with high temperature resistance and compression set resistance and a preparation method thereof, and relates to the technical field of rubber compositions, and the nitrile rubber composition is prepared from the following components in parts by weight: nitrile rubber, zinc oxide, sodium stearate, an enhanced supplementary additive, nano cerium oxide, carbon black, methyl phenyl silicone oil, resin, an anti-aging agent, sulfur and an accelerant. The nitrile rubber composition prepared by the invention is rich in elasticity and rebound resilience; the sealing material has excellent mechanical strength including expansion strength, elongation, tear strength and the like, has the characteristics of good air tightness, high temperature resistance and excellent compression set resistance, and can be suitable for most sealing occasions.

The invention relates to the technical field of functional agricultural films, and specifically discloses an agricultural film with improved light quality and temperature increase and a preparation method thereof. The agricultural film comprises the following raw materials: terephthalic acid, adipic acid, ethylene glycol, 1,4-cyclohexanediol, a fluorescent composite material, a catalyst and an auxiliary agent. The preparation method comprises the following steps: uniformly mixing terephthalic acid, adipic acid, ethylene glycol, 1,4-cyclohexanediol and the catalyst, and then, under the protection of an inert gas, performing an esterification reaction for 3-5 hours, heating the mixture for a polycondensation reaction for 1-3 hours, and cooling the mixture to obtain a polyester material. The polyester material, the fluorescent composite material and the auxiliary agent are uniformly mixed, extruded into granules, and then film-blowing is performed using a film blowing machine. The agricultural film prepared by the invention has low hygroscopicity, high light transmittance, good processing performance, and excellent rigidity, heat resistance, flexibility, impact resistance and light conversion effect.

The invention discloses a guide plate coating for a hot-rolled seamless steel pipe and a preparation method thereof, and belongs to the technical field of material preparation, the coating comprises the following components by weight: 30-60 parts of high temperature resistant organic silicon resin, 10-20 parts of a silane coupling agent, 3-20 parts of modified basalt fiber, 3-10 parts of sodium carboxymethyl cellulose, 0.5-5 parts of a dispersant, and 50-80 parts of ethanol. Physical interlocking and chemical bond linkage between modified basalt fiber cloth and other components of the coating are achieved, lanthanum-doped heteropolyacid nanometer POSS microspheres are loaded on the surfaces of modified basalt fibers, the nanometer structure of the POSS microspheres and other components in the coating form physical entanglement, the overall structural stability of the coating is improved, and the stability of the coating is improved. 2, 4, 6, 7, 8-tetrahydroxy anthraquinone can chemically react with a silane coupling agent, high-temperature-resistant organic silicon resin and the like to form a chemical bond and a three-dimensional structure, so that the coating has the advantages of high temperature resistance, impact resistance, wear resistance and cold and heat cycle resistance, and is suitable for a working environment of a guide plate of a hot-rolled seamless steel pipe.

The invention discloses a bio-based polycarboxylic acid anti-wrinkle finishing agent as well as a preparation method and application thereof, and the preparation method comprises the following steps: under the action of a catalyst and a phase transfer agent, carrying out addition reaction on dimethyl succinylsuccinate and methyl acrylate or dimethyl itaconate to obtain an addition product, and then saponifying and acidifying the obtained addition product to obtain the bio-based polycarboxylic acid anti-wrinkle finishing agent. The molecular structure of the prepared bio-based polycarboxylic acid anti-wrinkle finishing agent has a 2, 5-cyclohexanedione structure which not only provides certain rigidity for polycarboxylic acid molecules, but also has two carbonyl groups which can be condensed with other functional groups (such as amino, methyl, methylene and the like). When the bio-based polycarboxylic acid anti-wrinkle finishing agent is used for carrying out anti-wrinkle finishing on cotton fabrics, the bio-based polycarboxylic acid anti-wrinkle finishing agent not only has good wrinkle recovery performance, but also has the advantages of being small in dosage, good in fastness to washing and lasting in anti-wrinkle performance.

The invention discloses a starch-based surface sizing agent as well as a raw material composition, a preparation method and application thereof. The starch-based surface sizing agent comprises the following raw materials in parts by weight: 30-70 parts of a hard monomer, 20-60 parts of a soft monomer, 11-6 parts of a functional monomer, 22-10 parts of a functional monomer, 0.5-3.0 parts of an acid catalyst, 70-90 parts of native starch, 5-20 parts of polyol and 3-7 parts of an initiator. According to the invention, through the reaction of the polyhydric alcohol and the native starch, the surface strength of the raw paper can be greatly improved, meanwhile, linting and dusting are reduced, and the sizing degree, smoothness and printability of paper can be effectively improved. And during monomer graft copolymerization, functional monomers are introduced, so that the Cobb value of raw paper can be obviously improved while the cross-linking capability of the surface sizing agent and paper pulp fibers is further improved. According to the invention, modified starch is replaced by native starch, and polyhydric alcohols and functional monomers are added, so that the product can be applied to paper pulp with different qualities, and the water resistance of paper is obviously improved.

The invention discloses a beta-naphthol-based trifunctional resin / carbon fiber / diethylenetriamine composite material and a preparation method and application thereof, and belongs to the technical field of polymer resin.The preparation method includes the steps that beta-naphthol-based trifunctional resin and diethylenetriamine are evenly mixed and coated on a plurality of carbon fibers, and after high-temperature curing, pressing and cooling, the beta-naphthol-based trifunctional resin / carbon fiber / diethylenetriamine composite material is obtained; the beta-naphthol-based trifunctional resin / carbon fiber / diethylenetriamine composite material is obtained; the beta-naphthol-based three-functional-group resin is prepared by carrying out polymerization reaction on beta-naphthol, formaldehyde and epoxy chloropropane under the condition of an alkaline medium. Through cross-linking reaction between the beta-naphthol-based trifunctional resin and the curing agent diethylenetriamine with amino, the molecular chain of the epoxy resin is tighter, the intermolecular force is enhanced, a stable cross-linked structure is formed, the curing efficiency of the epoxy resin is improved, and the cured product has higher hardness and glass transition temperature. The doping of the carbon fibers enables the mechanical properties of the epoxy resin to be significantly improved.

The invention provides an intumescent flame-retardant fabric which comprises a fabric layer, an adhesive layer containing phosphorus and nitrogen doped graphene oxide, an adhesive layer containing dendritic polyguanidine / phytic acid Zn heterozygote and an adhesive layer containing acidified modified flaky silicon dioxide, the fabric layer, the adhesive layer containing phosphorus and nitrogen doped graphene oxide, the adhesive layer containing dendritic polyguanidine / phytic acid Zn heterozygote and the adhesive layer containing acidized modified flaky silicon dioxide are sequentially compounded to obtain the flame-retardant fabric, the intumescent flame-retardant method is adopted, the contact between a fire source and the fabric layer is isolated by utilizing the synergistic effect of the three flame-retardant coating layers, and the flame-retardant effect is achieved. Therefore, the fabric is endowed with flame retardant property.

The invention discloses a composite membrane based on sodium carboxymethyl cellulose and a preparation method of the composite membrane, and belongs to the technical field of polymer composite membranes. According to the invention, sodium carboxymethyl cellulose is used as a basic membrane, then by optimizing formula components and adding starch, cellulose nanocrystals and tannic acid to generate interaction force, the cross-linking property of a system can be increased, a matrix structure is strengthened, the mechanical property of the composite membrane is further increased, and the smoothness of the surface of the composite membrane is increased under the assistance of the action of carnauba wax; the plasticizer can increase the flexibility of the composite membrane, antibacterial groups can be carried by adding antibacterial particles and high-molecular sodium carboxymethyl cellulose groups, the composite membrane is endowed with remarkable antibacterial performance, and modified diatomite loaded sodium dehydroacetate also has a certain antibacterial effect and a synergistic effect, so that the antibacterial performance is more excellent, and the modified diatomite loaded sodium dehydroacetate can be inserted into a system; when the composite film is applied to food packaging, the shelf life of food can be prolonged.