1420 results about "Resin-Based Composite" patented technology

The invention relates to the technical field of epoxy resin composite materials, in particular to an epoxy resin-based composite material and a preparation method thereof. The epoxy resin-based composite material comprises modified carbon fibers and an epoxy resin base material impregnated on a modified carbon fiber matrix, and the epoxy resin base material comprises the following raw materials in parts by weight: 80-100 parts of epoxy resin, 4-18 parts of a toughening elastomer, 24-45 parts of a curing agent and 1-3 parts of an accelerant. The carbon fibers are subjected to surface grafting hyperbranched molecular modification, so that the interface action between the modified carbon fibers and an epoxy resin matrix can be remarkably enhanced, and meanwhile, the high strength and high temperature-resistant stability of the carbon fibers are utilized, so that the epoxy resin-based composite material has good toughening, reinforcing and temperature resistance improving effects.

The invention relates to a pitch carbon fiber reinforced resin-based composite material and a preparation method thereof. Pitch carbon fibers are subjected to electrochemical surface treatment in an acidic electrolyte and then treated with a silane coupling agent; blending and dispersing a polyfunctional epoxy resin matrix, inorganic nano heat-conducting particles treated by a silane coupling agent, a high-temperature curing agent and an organic solvent to obtain an epoxy resin matrix solution; winding the pitch carbon fiber and the epoxy resin matrix solution to prepare a prepreg, drying, cutting, paving, and hot-pressing and curing to obtain the high-compression high-thermal-conductivity pitch carbon fiber reinforced resin matrix composite material. The composite material has the unidirectional compression strength of 305-420MPa and the unidirectional thermal conductivity of 295-618W / (m.K), has excellent compression performance and thermal conductivity, can be used for preparing aerospace craft structures / functional parts, and can also meet the requirements of other industrial equipment fields on light-weight, high-strength, high-modulus and high-thermal-conductivity composite materials.

The invention belongs to the technical field of high polymer material design and intelligent manufacturing, and discloses a machine learning driven epoxy resin based composite material thermal-mechanical property aided design method, which comprises the following steps: S1, data acquisition and feature construction; s2, performing feature screening; s3, constructing and training an interpretable prediction model; s4, carrying out reverse design and optimization; and S5, performing closed-loop verification and updating. According to the method, the quantitative relation of structure-process-performance is constructed through an interpretable machine learning model, and the contribution mechanism of each factor is revealed by means of SHAP analysis. And finally, reversely designing an optimal epoxy resin monomer structure and a matched curing process according to the performance target. The limitation of a traditional trial and error method is broken through, collaborative optimization of the material structure and the forming process can be achieved, and the development efficiency of the epoxy resin-based carbon fiber composite material is remarkably improved.

Provided are a water-resistant wood-plastic reinforced composite flooring and a manufacturing method therefor. Wood flour is boiled in boiling water for 3-4 hours, filtered and dried, to obtain dried wood flour; polypropylene, butyl acrylate, methyl methacrylate, maleic anhydride and dicumyl peroxide are mixed evenly, extruded and granulated, and dried to obtain a compatibilizer; the dried wood flour and polypropylene are mixed evenly, the compatibilizer is added and mixed evenly, then extrusion and granulation, and injection molded, are performed, to obtain a wood-plastic flooring blank; a composite resin emulsion and a photoinitiator are ultrasonically mixed evenly, and the wood-plastic flooring blank is immersed therein, then taken out and dried at room temperature, and then vacuum dried and UV cured, to obtain water-resistant wood-plastic reinforced composite flooring.

The invention discloses a waterborne epoxy resin coating, a preparation method and application in bridge protection, and belongs to the technical field of coatings. The water-borne epoxy resin coating comprises the following raw material components in parts by weight: 15-25 parts of epoxy composite resin emulsion, 100 parts of emulsified asphalt, 3-5 parts of a curing agent and 6-10 parts of water, wherein the epoxy composite resin emulsion is obtained by carrying out a composite reaction on 30-60 parts by mass of epoxy resin, 2-3 parts by mass of an emulsifier, 6-9 parts by mass of an acrylate composition and 1.4-1.6 parts by mass of a co-stabilizer; the acrylate composition is prepared by prepolymerizing 15 to 16 parts by mass of butyl methacrylate, 10 to 12 parts by mass of 2-isopropenyl aniline, 5 to 7 parts by mass of allyl glycidyl ether and 1 to 1.2 parts by mass of allyl polyhedral oligomeric silsesquioxane and then combining the prepolymerized materials with 1 to 3 parts by mass of acrylic acid.

The invention discloses a gradient gradual change type powder material as well as a preparation method and application thereof. The gradient gradual change type powder material comprises a non-metal core, a transition layer, a gradual change layer and a modification layer. The gradient powder material provided by the invention shows excellent strength-ductility synergistic effect, high fracture toughness and enhanced fatigue, wear and corrosion resistance, is good in metal wettability, can effectively reinforce a metal matrix and improve the performance of the metal matrix, can also be well dispersed in resin, and can be applied to the field of metal materials. The gradient powder material disclosed by the invention has a wide application prospect, and can be applied to the fields of heat dissipation of electronic devices, high-speed cutting tools, grinding material and grinding tool materials, high-temperature protection materials and the like.

The invention provides a mold for forming a thermosetting resin matrix composite reinforcing rib and a preparation method of the reinforcing rib. A groove is formed; the mold convex block is arranged in the groove; the mold set is located above the mold protruding block and provided with an inner cavity with an opening in the bottom, and the inner cavity and the upper surface of the mold protruding block are spliced to define a mold cavity suitable for reinforcing rib forming; the first pressing block is located on one side of the mold set and the mold protruding block, the second pressing block is located on the other side of the mold set and the mold protruding block, the pressing blocks can be inserted into gaps between the grooves and the mold protruding block, and the pressing blocks apply pressure to the side face of the mold set through the effect of the grooves on the pressing blocks; the groove has a dip angle at the top edge of the pressing block insertion part; and the pressing block, the mold convex block and the mold group are fixed through fasteners. According to the mold and the preparation method, the metal mold is used for multi-dimensional pressurization and mold closing net size forming, the produced reinforcing rib structure is good in size stability, the production cost of the reinforcing rib structure is reduced, and the production efficiency of products is improved.

The invention discloses a high-thermal-conductivity carbon skeleton resin-based composite material and a preparation method thereof, and belongs to the technical field of thermal conductive composite materials. The preparation method comprises the following steps: firstly, preparing a fibrofelt preform from chopped mesophase pitch-based carbon fibers, and growing carbon nanotubes on the carbon fibers in situ by adopting a chemical vapor deposition process; depositing a layer of pyrolytic carbon through a chemical vapor infiltration process, and jointly connecting the carbon nanotubes / pyrolytic carbon with the chopped carbon fibers in the preform to prepare a porous hybrid network structure; carrying out graphitization treatment on the network structure to obtain a high-thermal-conductivity hybrid carbon skeleton composed of carbon fibers, carbon nanotubes and pyrolytic carbon; and impregnating polymer resin into the hybrid carbon skeleton structure through an impregnation process, and curing to obtain the carbon skeleton resin-based composite material. According to the prepared carbon skeleton resin-based composite material, when the volume fraction of the carbon skeleton accounts for 19.2 vol%, the thermal conductivity in the thickness direction of the composite material reaches 20.9 W / m.K which is 99 times of the thermal conductivity of pure epoxy resin, and the carbon skeleton resin-based composite material can be used as a novel thermal management material.

The invention discloses a super-hydrophobic anti-icing coating for a power transmission line and a preparation method, and belongs to the technical field of preparation of anti-icing coatings. The super-hydrophobic anti-icing coating for the power transmission line is composed of a coating wrapping the surface of the power transmission line, and the coating is composed of the following components in parts by weight: 34-45 parts of composite resin, 8-14 parts of a composite ice melting agent, 10-18 parts of deionized water, 1-3 parts of hexadecyl trimethoxy silane and 50-58 parts of tetrahydrofuran, the composite resin is prepared from carboxyl multi-walled carbon nanotubes, isopropanol, tetraethoxysilane, a silane coupling agent KH-550, perfluorodecyl trimethoxysilane, butyl acrylate, methyl methacrylate and dodecafluoroheptyl methacrylate, and the composite ice melting agent is prepared from pyridine-2, 6-dicarboxylic acid, thionyl chloride and nicotinic acid hydrazide. The coating prepared by the method has excellent hydrophobicity, wear resistance and anti-icing effect.

The invention relates to composite resin for packaging a Topcon component as well as a preparation method and application of the composite resin. Comprising an acrylate monomer, an aliphatic polyurethane acrylate oligomer, hydroxyl acrylate, bisphenol A acrylate, maleic anhydride modified epoxy acrylate, a light curing agent, a latent curing agent, a flame retardant A, a flame retardant B, a thixotropic agent, an anti-aging agent, a UV absorbent and a light stabilizer. The composite resin has the comprehensive performance of high viscosity, low shrinkage, super weather resistance and flame retardance, the aluminum-containing backboard prepared from the composite resin is high in water resistance and super weather resistance, due to the fact that light-heat double-stage curing is adopted for curing, the resin collapses and is cured to generate a solid phase, and in the follow-up aluminum foil hot-pressing curing process, the solid phase is solidified to form a solid phase; the resin is further infiltrated and cured, the porosity of the resin can be greatly reduced through a dual-curing system, water cannot enter the interior in the long-term use process, and voltage breakdown reduction of the aluminum-containing back plate under the long-term damp and hot condition is completely eradicated.

The invention relates to the technical field of composite materials, in particular to a nano-montmorillonite reinforced unsaturated polyester resin based composite material and a preparation method thereof. Comprising the following raw materials in parts by weight: 60-85 parts of orthophthalic unsaturated polyester resin, 3-15 parts of nano montmorillonite, 1-5 parts of a polyfunctional group intercalator, 1-4 parts of an initiator, 0.5-2 parts of dimethylaniline and 0.5-3 parts of gamma-aminopropyltriethoxysilane. The polyfunctional intercalator interacts with interlayer ions and surface groups of the nano-montmorillonite through multiple functional groups of the polyfunctional intercalator, and is effectively inserted into the interlayer of the nano-montmorillonite, so that the interlayer spacing is obviously increased, and favorable conditions are provided for subsequent insertion and compounding of resin; the functional groups not only can chemically react with active groups of unsaturated polyester resin to form stronger chemical bonding, but also can enhance the interface bonding force between two phases through physical entanglement, so that the overall performance of the composite material is remarkably improved.

The invention provides a fiber resin-based composite material with an interlayer wave lock structure and a preparation method of the fiber resin-based composite material, and relates to the technical field of fiber resin-based composite materials. The fiber resin-based composite material with the interlayer wave lock structure comprises a plurality of layers of unidirectional fiber resin cloth and a plurality of layers of fabric fiber resin cloth which are laminated and combined through hot pressing, the resin in the unidirectional fiber resin cloth is the same as that in the fabric fiber resin cloth; the unidirectional fiber resin cloth and the fabric fiber resin cloth are formed by unidirectional fiber resin-based prepreg cloth and fabric fiber resin-based prepreg cloth through hot-pressing dipping and hot-pressing curing in sequence. The composite material provided by the invention has good impact resistance and compression resistance, and is not prone to layering damage when subjected to loads such as impact and compression.

The invention discloses a self-cleaning anti-reflection coating liquid as well as a preparation method and application thereof, and belongs to the technical field of photovoltaic glass. The self-cleaning anti-reflection coating liquid is prepared from the following components in parts by weight: 100 to 120 parts of silicon dioxide composite resin emulsion; 0.5 to 2 parts of an adhesion promoter; and 10 to 20 parts of water. The self-cleaning anti-reflection coating liquid has the effects of being hydrophilic, self-cleaning and capable of improving the transmittance of incident light. Wherein the composite functional component is mainly modified silicon dioxide composite amphiphilic acrylic resin and is formed by silicon dioxide modification, acrylic monomer modification and emulsion polymerization, the prepared self-cleaning anti-reflection coating liquid is used for surface coating of plastic films, glass and the like, and the functions of hydrophilicity (the contact angle is smaller than or equal to 5 degrees), the anti-reflection rate of 3% and high weather resistance (QUV is larger than or equal to 500 h) can be achieved; wide market application prospects are realized in the photovoltaic glass industry.

The invention provides a preparation method of a self-repairing resin-based composite material based on dynamic bonds. The self-repairing epoxy resin comprises one covalent dynamic bond of a Diels-Alder bond, a disulfide bond or a borate bond, and the preparation method of the self-repairing epoxy resin comprises the following steps: heating epoxy resin to a molten state, adding a curing agent component while stirring, and carrying out a prepolymerization reaction to obtain a prepolymer; the curing agent comprises a rigid diamine curing agent, a dynamic diamine monomer and a flexible chain segment regulator, and the dynamic diamine monomer contains a dynamic covalent bond; and carrying out curing molding on the prepolymer to obtain the self-repairing epoxy resin. And impregnating reinforced fibers or fabrics thereof with the prepared prepolymer, and heating and curing to obtain the self-repairing resin-based composite material. The invention provides a chemical molecule design, dynamic reversible chemical bonds are introduced into a resin matrix, and by constructing the dynamic bonds, the composite material has high performance of a traditional composite material and also has life-like self-healing ability.

The invention relates to a locally hydrophobic glass bead and a preparation method thereof, and is characterized in that the preparation method comprises the following steps: (1) selecting a glass bead with D50 of 5-100 [mu] m and a particle size distribution span of not more than 0.2, and cleaning and drying the glass bead; (2) placing glass beads on a substrate provided with a group of spherical grooves; (3) treating the exposed surfaces of the glass beads by using a hydrophobic agent alkyl siloxane or fluorinated siloxane solution, and then carrying out heat treatment to complete curing and film forming; and (4) stripping the glass beads subjected to surface film formation from the substrate provided with the spherical grooves. The invention has the advantages that the glass bead with a hydrophilic and hydrophobic composite surface and the preparation method of the glass bead are provided; the locally hydrophobic glass beads can play a role similar to a surfactant or a coupling agent when being used as an emulsion coating filler or an organic resin-based composite material filler, so that the mixing uniformity of the locally hydrophobic glass beads in a material system is effectively improved, and the binding force is improved.

To provide a fibrous cellulose having high reinforcing effect of a resin, a fibrous cellulose composite resin having high intensity, and a method for producing the fibrous cellulose having the high reinforcing effect of the resin.SOLUTION: A fibrous cellulose has an average fiber width of 0.1 μm or more, has some or all of hydroxyl groups substituted with carbamate groups, has a carbamate group substitution rate of 1.0 mmol / g or more, and has a fine rate of 30% or more. The fibrous cellulose composite resin comprises fibrous cellulose and a resin, the fibrous cellulose being the aforementioned fibrous cellulose. Moreover, when producing the fibrous cellulose, a cellulose raw material and urea or the like are heat-treated and some or all of the hydroxyl groups in the cellulose raw material are substituted by the carbamate groups, the fibers are separated until the average fiber width is 0.1 μm or more, the heat treatment is performed such that the carbamate group substitution rate reaches 1.0 mmol / g or more, and the fibers are separated until the fine rate is 30% or more.SELECTED DRAWING: None

The invention provides a modified MOF synergistic resin-based composite material as well as a preparation method and application thereof, and belongs to the technical field of pollutant treatment. The method for preparing the resin-based composite material comprises the following steps: S1, mixing an MOF raw material, a modifier, resin and a solvent, and stirring to obtain a mixture; s2, performing solvothermal reaction on the mixture obtained in the step S1 to obtain a modified MOF synergistic resin-based composite material; wherein in the step S1, the MOF raw material is composed of ZrCl4 and 2-aminoterephthalic acid, and the modifier is carboxylic acid containing a sulfur element; in the step S2, the temperature of the solvothermal reaction is 100-150 DEG C. The resin-based composite material synthesized by the method has higher copper ion and antimony ion adsorption capacity.

The invention relates to silver paste, a preparation method thereof and a photovoltaic cell. The silver paste can be used for the photovoltaic cell. The preparation method of the silver paste comprises the following steps: adding composite resin into a solvent to form an organic carrier; adding silver powder and a cross-linking curing mixing agent into the organic carrier, and stirring to obtain initial silver paste; adjusting the viscosity of the initial silver paste and / or the fineness of the initial silver paste to obtain silver paste; wherein the composite resin comprises hydroxyl modified polyester resin. The silver paste prepared through the preparation method of the silver paste has high adhesive force, the working stability of a photovoltaic cell can be improved, and the service life of the photovoltaic cell can be prolonged.

The invention relates to the technical field of composite resin preparation, and discloses a silicon-molybdenum alloy target material preparation method which comprises the following steps: preparing raw materials, selecting molybdenum powder and silicon powder with the purity not lower than 99.9%, mixing, putting the raw materials into a vacuum mixer, vacuumizing to 0.01-0.1 Pa, stirring for 1-5 hours, carrying out ultrasonic assistance, controlling the temperature to 25-40 DEG C to prevent oxidation, and carrying out a forming process. Filling the mixed powder into a detachable hard alloy mold coated with a 0.05-0.2 mm boron nitride coating, carrying out cold press molding, maintaining the pressure for 5-20 minutes to obtain a biscuit, sintering, putting the biscuit into a vacuum sintering furnace, firstly carrying out microwave-assisted heating, then raising the temperature to 1500-1800 DEG C, introducing trace argon in the later period to regulate and control a structure, carrying out a post-treatment process, carrying out numerical control processing on a sintered target material, carrying out chemical cleaning on the mixed solution of hydrofluoric acid and nitric acid, and finally carrying out vacuum sintering. Performing plasma treatment; and finally, performing vacuum packaging and filling high-purity nitrogen. The raw materials are high in purity and excellent in granularity; uniformly mixing and preventing oxidation; forming and sintering are precisely controlled, and the quality of the target material is guaranteed; the surface performance is improved through post-treatment, packaging is oxygen-proof and moisture-proof, and the target material meets the high-end industry requirement.

The present disclosure provides a low-temperature conductive paste and a raw material composition thereof, and a heterojunction cell electrode and a manufacturing method therefor. The raw material composition comprises the following components in percentage by mass: 2%-10% of a composite resin, 2%-4% of an organic solvent, 0.2%-1% of an auxiliary agent, and 85%-94% of conductive metal powder. The resin comprises a component A and a component B. The component A comprises a polyol and a blocked isocyanate. The component B comprises a curing agent and a resin. The present disclosure further provides a low-temperature conductive paste prepared from the raw material composition, a heterojunction cell electrode manufactured from the low-temperature conductive paste, a manufacturing method for the electrode, and a heterojunction cell manufactured from the electrode. The low-temperature conductive paste and the heterojunction cell electrode provided by the present disclosure have high conductivity and weather resistance.

The present application relates to the field of fiber-reinforced resin matrix composite molding, and in particular to a thermal compensation design and implementation method for the near-net-shape molding of a thermoset composite component and based on a temperature field and a cure degree field. The method comprises: establishing a minimum symmetric unit model on the basis of the size of a component, the size of a mold, and an ambient temperature; establishing a cure kinetics model and a heat transfer model; incorporating a molding temperature profile into a subprogram; on the basis of an obtained temperature field and an obtained cure degree field, performing simulated thermal compensation on regions where the temperature is lower than a molding temperature and the temperature difference from the molding temperature is greater than or equal to 5% of the molding temperature, until the difference between the temperature of each region and the current molding temperature is lower than 5% of the molding temperature; then, performing stimulated thermal compensation on regions where the cure degree is less than or equal to 0.9; and assembling a thermal compensation apparatus on the basis of a thermal compensation design scheme, performing experimental validation, and when the difference between an actually measured temperature value and a simulated value is less than 5% and the cure degree exceeds 0.9, obtaining a thermal compensation scheme and a thermal compensation method. The blindness of traditional molding that relies on experience is reduced.

The invention provides an online monitoring method for a curing process of a resin-based composite material, and belongs to the technical field of curing monitoring of composite materials. In the curing process of the resin-based composite material, a conductive patch is placed on the surface of the resin-based composite material to form a laminated structure consisting of the conductive patch, a dielectric layer containing resin and a high-reflection substrate, and the curing process of the resin-based composite material is deduced in real time by using a microwave signal to radiate the laminated structure and monitoring peak valley characteristics and temperature changes of a reflection signal. According to the method, a microwave signal is utilized to irradiate a laminated structure, and the curing process of the resin-based composite material is judged by monitoring the peak valley characteristics and temperature change of a reflected signal in real time. The in-situ online curing process monitoring method based on the microwave signal and the conductive patch film sensor not only can realize real-time online monitoring of the resin curing key point and the curing degree, but also has the remarkable advantages of being capable of adjusting the monitoring position in real time, realizing curing degree field monitoring and the like.

The invention relates to the technical field of polymer composite materials, and discloses a nano-ceramic-based composite insulating coating and a preparation method thereof, and the coating is prepared from a composite resin matrix, a composite functional ceramic filler, a double-reactivity organosilicon linker and an initiator. Wherein the composite resin matrix is composed of vinyl-terminated polydimethylsiloxane and a vinyl ether functionalized fluorocarbon copolymer, and a soft and rigid interpenetrating network structure is formed. The composite functional ceramic filler is prepared from needle-shaped silicon nitride, flaky hexagonal boron nitride, nano silicon dioxide, nano cerium oxide and nano barium titanate. According to the invention, a chemical bonding interface is constructed between the inorganic filler and the organic resin, and the synergistic effect of the composite matrix and the multifunctional filler is optimized, so that the coating has excellent adhesive force, flexibility and thermal shock resistance, obtains high volume resistivity and breakdown strength, and meets the insulation protection requirements under harsh working conditions.

The invention discloses a fusion graph recognition and symbolic expression-based resin-based composite material automatic native modeling and reverse design method and system, belongs to the field of composite material modeling and design, and particularly relates to a graph neural network and symbolic regression fusion-based composite material native modeling and structure reverse optimization method. The method comprises six steps of microcosmic image structure extraction, topological graph construction and graph embedding, constitutive relation symbol modeling, graph structure homogenization, performance-oriented reverse design and multi-modal performance prediction, and can realize an automatic process from microcosmic image to macroscopic performance prediction to structure optimization design. The problems that an existing method is low in efficiency, poor in interpretability and difficult in reverse design are solved, and the modeling efficiency and the design intelligence level of the composite material under multiple scales and multiple targets are improved.

To provide a fibrous cellulose having high reinforcing effect of a resin, a fibrous cellulose composite resin having high intensity, and a method for producing the fibrous cellulose having the high reinforcing effect of the resin.SOLUTION: A fibrous cellulose has an average fiber width of 0.1 μm or more, has some or all of hydroxyl groups substituted with carbamate groups, has a carbamate group substitution rate of 1.0 mmol / g or more, and has a fine rate of 10% or more and 35% or less. The fibrous cellulose composite resin comprises fibrous cellulose and a resin, the fibrous cellulose being the aforementioned fibrous cellulose. Moreover, when producing the fibrous cellulose, a cellulose raw material and urea or the like are heat-treated and some or all of the hydroxyl groups in the cellulose raw material are substituted by the carbamate groups, the fibers are separated until the average fiber width is 0.1 μm or more, the heat treatment is performed such that the carbamate group substitution rate reaches 1.0 mmol / g or more, and the fibers are separated until the fine rate is 10% or more and 35% or less.SELECTED DRAWING: None

The invention relates to the technical field of composite materials, in particular to a high-conductivity thermosetting resin-based composite material and a preparation method thereof.The high-conductivity thermosetting resin-based composite material is prepared from, by weight, 50-80 parts of epoxy resin, 10-30 parts of conductive carbon nanotubes, 20-40 parts of nano-silver particles, 10-20 parts of functionalized polyurethane prepolymer, 5-15 parts of polyamine curing agent and 2-8 parts of organosilane coupling agent. 5-15 parts of graphene nanosheets, 5-15 parts of aluminum borate whiskers and 5-15 parts of barium titanate nanoparticles; 2-10 parts of conductive polymer microspheres; 1 to 5 parts of nano zinc oxide; wherein the conductive polymer microsphere comprises a core formed by polyaniline or polypyrrole, and a polyurethane polymer or a polyacrylate polymer wrapping the outer layer of the core; the surface of the core is modified by adopting nano silver particles and gamma-aminopropyltriethoxysilane; the conductive polymer microspheres are used for providing a long-range conductive path, the nano-silver particles are used for providing short-range conductive connection, and the conductive polymer microspheres and the nano-silver particles form a multi-layer conductive network.

The invention relates to a flame-retardant railway tunnel EVA waterproof board with a smoke suppression effect and a preparation method thereof. The EVA waterproof board comprises the following components in percentage by weight: 35-37% of waterproof board EVA composite resin particles, 4-11% of high-density polyethylene, 16-17% of linear low-density polyethylene and 35-45% of flame-retardant master batch. Wherein the flame-retardant master batch is obtained by extruding and granulating a blend of high-density polyethylene and a flame retardant, the flame retardant is obtained by performing surface coating modification on CTAB (ADP) by adopting gamma-aminopropyltriethoxysilane and vinyltriethoxysilane, and the CTAB (ADP) is obtained by coating the surface of CTAB with the modified ADP. On the premise of meeting the required mechanical property, the EVA waterproof plate can reach the flame retardant standard B1 grade of a building material, and the smoke yield is low.

The invention discloses a composite resin-based hard carbon negative electrode material for a sodium-ion battery and a preparation method of the composite resin-based hard carbon negative electrode material, belongs to the technical field of negative electrode material processing, and aims to solve the technical problem that the electrochemical performance, the stability and the environmental protection property of the composite resin-based hard carbon negative electrode material for the sodium-ion battery in the prior art need to be further improved. The sodium ion composite resin-based hard carbon negative electrode material comprises the following components in parts by weight: 70-80 parts of a modified composite resin-based hard carbon material, 7-10 parts of a conductive agent, 4-7 parts of a modified cross-linking agent and 5-10 parts of a solvent, lignin is used as a raw material to prepare the sodium ion composite resin-based hard carbon negative electrode material, and the sodium ion composite resin-based hard carbon negative electrode material is compounded with the modified cross-linking agent, the conductive agent and a filler to prepare the sodium ion composite resin-based hard carbon negative electrode material. And the composite resin-based hard carbon negative electrode material for the sodium ion battery, which is stable in structure, improved in electrochemical performance and environment-friendly, is obtained.

The invention discloses polytetrafluoroethylene composite resin and a preparation method thereof. The polytetrafluoroethylene composite resin comprises one or more modified fillers to enhance mechanical properties, increase dielectric constant and reduce dielectric loss. According to the preparation method of the polytetrafluoroethylene composite resin, the modified filler is added into the polytetrafluoroethylene which is uniformly mixed with the dispersion liquid, and the modified polytetrafluoroethylene composite resin is obtained through condensation treatment. The method is simple and easy to operate, and the influence of introduction of other solvents on the resin performance can be avoided while high-concentration dispersion can be realized.

The invention belongs to the technical field of precoated sand production, and particularly relates to high-temperature-resistant precoated sand for casting and a preparation technology of the high-temperature-resistant precoated sand. The high-temperature-resistant precoated sand for casting provided by the invention comprises the following raw materials in parts by weight: 1000 parts of base sand, 25-40 parts of composite resin, 10-18 parts of a high-temperature-resistant auxiliary agent, 5-15 parts of a curing agent, 5-15 parts of a silane coupling agent KH-570 and 2-3 parts of a lubricating agent. The high-temperature-resistant precoated sand for casting provided by the invention has excellent high-temperature resistance, mechanical property, thermal shock resistance, flowing property, environment-friendly economy and the like, the quality and efficiency of a casting process can be remarkably improved, and the requirements of aerospace, automobile engines and other high-end fields on high-performance precoated sand are met; the method has important application value and market prospect.