217results about How to "Strong mechanical properties" patented technology

The invention belongs to the technical field of composite fiber materials, and relates to a functional thermal management fabric, in particular to a phase change microcapsule doped flexible cooling fiber fabric and a preparation method thereof. The fabric has a controllable double-layer structure and is formed by assembling nanofibers and micro-nanofibers doped with a large number of phase change microcapsules. Wherein the micro-nano fiber layer has relatively high sunlight reflectivity and atmospheric window wave band emissivity, and shows an excellent radiation cooling effect; the microcapsule content of the nanofiber layer doped with a large amount of phase change microcapsules is not less than 10 wt%, and the nanofiber layer has no rupture phenomenon, has high heat storage capacity, not only makes up for the deficiency of radiation cooling capacity, but also effectively slows down temperature fluctuation. The radiation cooling technology and the phase change latent heat technology are combined, so that the long-time temperature control performance of the fabric is realized, and the thermal shock resistance is enhanced. In addition, the fabric also has excellent mechanical property, flexibility, washability, air permeability, moisture penetrability and sunscreen property.

The invention relates to a preparation method of high-strength and high-toughness composite silicon carbide ceramic, which comprises the following steps: mixing 70-82 parts of micron-sized alpha-silicon carbide powder, 5-15 parts of a mixed reinforced phase, 5-10 parts of a sintering aid, 1.9-2.1 parts of a dispersant and 0.9-1.1 parts of a binder to obtain a powder raw material, adding deionized water into the powder raw material, and carrying out ball milling to obtain water-based slurry; carrying out spray granulation on the water-based slurry to prepare spherical granulation powder; and adding the spherical granulation powder into a graphite mold, putting the graphite mold into a hot-pressing sintering furnace, heating to a sintering temperature, and carrying out hot-pressing sintering to obtain the high-strength and high-toughness composite silicon carbide ceramic. By adopting the method disclosed by the invention, the high-performance silicon carbide ceramic material with higher mechanical property and higher toughness can be obtained.

The invention belongs to the technical field of lithium ion batteries, and discloses an amidated polyacrylic acid water-based polymer binder for a silicon-based negative electrode of a lithium ion battery and a preparation method and application of the amidated polyacrylic acid water-based polymer binder for the silicon-based negative electrode of the lithium ion battery. The preparation method comprises the following steps: under a protective atmosphere, sequentially adding 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride, N-hydroxysuccinimide and levodopa, stirring to fully react, carrying out dialysis freeze-drying treatment to obtain a primary product PL, and uniformly mixing the PL with glycerol to obtain the product. According to the binder, a dynamic bond is successfully introduced, the transportation efficiency of lithium ions is improved, a three-dimensional network structure is constructed, adverse stress generated by volume expansion of a SiOx negative electrode material in the charging and discharging process of an electrode can be effectively inhibited, and the SiOx negative electrode shows good cycling stability.

The invention provides application of a CoSe2-rGO catalyst in degradation of ofloxacin, and belongs to the technical field of sewage treatment. The graphene oxide (GO) with good ion selectivity, strong mechanical property and pollution resistance is used as a carrier, the carrier is combined with the transition metal selenide through a simple hydrothermal method to form a heterojunction composite material, and the prepared CoSe2 / rGO composite catalyst is used for activating PMS, has excellent catalytic activity, stability, durability and universality, and has good application prospects. And a feasible choice is provided for green elimination of antibiotic pollution in the environment.

The invention relates to the field of electronic and electrical connection, and discloses a manufacturing method of a wire with a terminal, which comprises the following steps: S1, preparing a conductive adhesive: mixing epoxy resin, silver powder, copper nanoparticles, carbon nanotubes, a curing agent, a toughening agent, a dispersing agent and a defoaming agent according to a ratio to obtain the conductive adhesive; the conductive adhesive is obtained through premixing, nano-particle dispersion, step-by-step addition of silver powder, defoaming treatment, addition of a flexibilizer and secondary dispersion. S2, peeling, cleaning, coarsening and activating the wire and the terminal; s3, coating a conductive adhesive on a connection area of the conductor of the electric wire and the terminal; s4, inserting the wire into the terminal, and applying pressure for bonding; and S5, after the connecting piece is preliminarily cured, the connecting piece is completely cured. Efficient connection between the wire and the terminal is achieved through the conductive adhesive, mechanical damage caused by traditional crimping is avoided, the conductivity and mechanical strength are improved, adaptability is high, and reliable electrical connection can be provided in a severe environment.

The invention relates to a multi-core-group ceramic capacitor and a preparation method thereof, and the capacitor comprises a first welding piece and a second welding piece which are oppositely arranged, a capacitor body arranged between the first welding piece and the second welding piece, and a mold pressing housing wrapping the periphery of the capacitor body. Comprising two connecting frames arranged oppositely, a supporting frame arranged between the two connecting frames and two capacitor chip sets arranged between the connecting frames and the supporting frame respectively, each capacitor chip set comprises a plurality of capacitor chips arranged in sequence, a first welding piece is connected with the tops of the two connecting frames, and a second welding piece is connected with the bottom of the supporting frame; the structure of the multi-core group ceramic capacitor is limited, the internal structure of the multi-core group ceramic capacitor is improved, the ends of the capacitor chips are welded with the connecting frame and the supporting frame and then are welded with the welding sheets, and the connecting frame and the supporting frame can be locally deformed when bearing stress, so that the impact of the stress on the capacitor chips is released, and meanwhile, the strain resistance is improved.

The invention belongs to the technical field of refractory materials, and particularly relates to a dispersion breathable refractory brick and a production process thereof. The dispersion breathable refractory brick is prepared from the following raw materials in parts by mass: 50-60 parts of silicon / titanium coated corundum particles, 30-40 parts of corundum particles, 15-20 parts of alumina micro powder, 8-12 parts of magnesium oxide micro powder, 3-5 parts of activated alumina micro powder, 1-3 parts of niobium pentoxide, 4-8 parts of phenolic resin and 3-5 parts of water. The prepared dispersion breathable refractory brick has the advantages of being high in slag corrosion resistance, good in thermal shock resistance, high in mechanical property and the like.

The invention is applied to the technical field of polishing pad preparation, and particularly discloses a preparation method of a high-density and high-hardness foamed polyurethane polishing pad, which comprises the following steps: S1, raw material pretreatment; s2, a prepolymer synthesis step; s3, a foaming and forming step; s4, demolding and post-processing are carried out; and S5, sheet detection and formula optimization: detecting the hardness and density of the treated polishing pad finished product, and correspondingly adjusting the mixing ratio of the raw materials according to the detection result. According to the preparation method of the high-density and high-hardness foamed polyurethane polishing pad, polyether polyol and polyester polyol are mixed and then react with isocyanate, the polyether polyol and the polyester polyol do not react, and the polyether polyol and the polyester polyol jointly participate in the reaction of the isocyanate after being mixed, so that the high-density and high-hardness foamed polyurethane polishing pad is prepared. The generated polymer combines the advantages of polyether polyol and polyester polyol, and has stronger mechanical properties and chemical resistance than a polymer generated from a single component, so that the quality of a finished product of the polishing pad can be improved.

The invention provides a novel TPMS porous structure interbody fusion cage, and relates to the technical field of medical materials. The interbody fusion cage is designed by using a porous frame structure with different unit cell sizes and porosities, so that the biocompatibility of the interbody fusion cage is enhanced, the interbody fusion cage has higher mechanical properties, large static compression load and low elastic modulus, the elastic modulus is closer to that of human cortical bones, the stability of an implant in the early stage of osseointegration is improved, and the interbody fusion cage is suitable for being used in the field of osteosynthesis. Under the same porosity, the elastic modulus is lower, and the comprehensive performance is excellent.

The invention discloses a collagen-based and high-transparency matrix for cornea thickening and a preparation method of the collagen-based and high-transparency matrix. The preparation method comprises the following steps: assembling a collagen composite solution into a collagen matrix implant on a set curvature mold through electrochemical deposition; the collagen composite solution is prepared from collagen, glacial acetic acid, hydrogen peroxide, heparin and water; putting the obtained collagen matrix implant and a mold into a cross-linking agent solution for cross-linking; cleaning the residual cross-linking agent after completion, separating the collagen matrix implant from the mold, and placing the collagen matrix implant under an ultraviolet light source for cross-linking to obtain a double-cross-linked collagen matrix implant; and soaking the double-crosslinked collagen matrix implant in a nerve growth factor solution, and performing absorption and combination to obtain the collagen-based and high-transparency matrix for cornea thickening. According to the invention, an electro-deposition assembly technical scheme is adopted, the diameter and thickness of collagen assembly fibers are adjusted and controlled through electric field energy, and the collagen assembly fibers are orderly and regularly arranged, so that scattering and refraction of light are reduced, the light transmittance of cornea is increased and can reach more than 90%, and the problem of light blocking caused by materials is effectively avoided. Operation is matched with femtosecond equipment, operation is easy, consumed time is short, and trauma is small.

The invention discloses a long-time strong-adhesion tissue repair patch and a preparation method thereof, and the preparation method comprises the following steps: adding an adhesion component, an anti-swelling component and alpha-ketoglutaric acid into a colloidal aqueous solution of a patch matrix material to obtain a precursor solution; and pouring the precursor solution into a patch mold, carrying out ultraviolet curing, and drying the obtained gel to obtain the patch. From the selection of materials and chemical bonds, physical and chemical bonds such as amido bonds, disulfide bonds and catechol groups are combined, so that the adhesion strength is improved, the adhesion duration is prolonged, and the adhesive has excellent anti-swelling performance and mechanical performance, can effectively isolate external saliva, food residues and the like when being applied to the oral cavity, reduces infection of ulcer wounds, and has a good application prospect. The dental ulcer healing is accelerated, and the method also has a relatively good application prospect in the field of tissue repair.

The invention discloses a polyimide binder for a positive electrode of a lithium ion battery and a preparation method of the polyimide binder. The polyimide binder contains cyclodextrin and sulfonic acid groups; the preparation method comprises the following steps: dissolving cyclodextrin, sulfonated diamine and triethylamine in an organic solvent, stirring until the materials are fully dissolved, and then adding dicarboxylic anhydride to obtain a sulfonated polyamide acid solution included by cyclodextrin; adding benzoic acid and a catalyst into the mixture, carrying out imidization, cooling, adding a washing solvent to separate out precipitates, and filtering to obtain a polyimide binder; the polyimide binder disclosed by the invention has excellent thermal stability and relatively high mechanical property, meanwhile, the relatively high binding strength effectively inhibits separation between the binder and active substance particles and aluminum foil, and an electrode plate prepared by adopting the obtained polyimide binder is used in a lithium ion battery, so that the service life of the electrode plate is prolonged, and the service life of the electrode plate is prolonged. And the electrochemical performance of the lithium ion battery is effectively improved.

The invention relates to the technical field of fiber membranes, and discloses an anti-ultraviolet aging polylactic acid composite fiber membrane, and compared with a pure-phase polylactic acid fiber membrane, a polylactic acid fiber membrane added with benzophenone-based polyethylene glycol grafted nano titanium dioxide has stronger mechanical properties and anti-ultraviolet aging capability, and the anti-ultraviolet aging polylactic acid composite fiber membrane has the advantages that the mechanical property is better; nanometer titanium dioxide is a broadband series semiconductor additive material, a network structure can be formed between the nanometer titanium dioxide and an organic matrix, the mechanical performance of the fiber membrane is improved, the ultraviolet absorption capacity of the polylactic acid fiber membrane is improved, and a benzophenone derivative can serve as an ultraviolet absorbent to be added into the polylactic acid fiber membrane, so that the ultraviolet absorption capacity of the polylactic acid fiber membrane is improved. The anti-ultraviolet aging effect of the polylactic acid fiber membrane is improved, the polyethylene glycol and the polylactic acid have good compatibility, and the anti-ultraviolet aging and mechanical properties of the nano titanium dioxide in the polylactic acid fiber membrane are improved.

The invention provides a composite solid-state electrolyte and a preparation method and application thereof, and relates to the technical field of solid-state electrolytes.The preparation method of the composite solid-state electrolyte comprises the following steps that (a) polymethyl methacrylate and lithium aluminum titanium phosphate are mixed and formed and then subjected to calcination treatment, and porous lithium aluminum titanium phosphate is obtained; (b) mixing the porous titanium lithium aluminum phosphate obtained in the step (a) with a polymer electrolyte solution, and drying to obtain a composite solid electrolyte; wherein the polymer electrolyte solution contains a polymer matrix and a lithium salt. According to the invention, the technical problems of long preparation time, low production efficiency and difficulty in remarkably improving the ionic conductivity of the solid electrolyte in the prior art are solved, and the technical effects of simple and feasible preparation process, high controllability, high ionic conductivity of the product, strong mechanical property and good cycling stability are achieved.

The invention provides a modified copolyester film as well as a preparation method and application thereof. The modified copolyester film is prepared from the following raw materials: binary acid, dihydric alcohol and a catalyst, the binary acid comprises 2, 5-furandicarboxylic acid and other binary acid; the dihydric alcohol comprises neopentyl glycol and other dihydric alcohol. 2, 5-furandicarboxylic acid is introduced into a modified copolyester molecular chain, so that the polarity and hydrophilicity of polyester are improved, the interfacial interaction force between the polyester surface and a copper foil is increased, and the adhesive force between the polyester surface and the copper foil is improved; neopentyl glycol is introduced into a modified copolyester molecular chain, so that the regularity of polyester is further destroyed, the crystallinity and the melting point of polyester are reduced, the film is easier to soften or partially melt when in contact with a copper foil, the contact area between the film and the copper foil is increased, mutual diffusion between the film and the copper foil is increased, and the bonding strength between the film and the copper foil is improved.

The invention relates to the technical field of solid waste recycling and material engineering, in particular to a high-wear-resistance composite coating and a preparation method thereof.The composite coating comprises waste glass, a coupling agent, ethyl alcohol, a film-forming base material, an additive and a curing agent; the preparation method comprises the following steps: firstly preparing a modified waste glass micro powder filler, then preparing a defoaming film-forming base material, and finally uniformly mixing the modified waste glass micro powder filler and the defoaming film-forming base material to prepare the composite coating with high wear resistance and corrosion resistance. According to the high-wear-resistance composite coating provided by the invention, the high-wear-resistance composite coating is converted into a high-performance and low-cost filler through specific process treatment, so that the environment-friendly high-wear-resistance composite coating with relatively strong mechanical property, high wear resistance, high corrosion resistance and environmental protection is obtained, and the friction coefficient of the high-wear-resistance composite coating is 0.2-0.8.

The invention provides a lithium aluminate modified graphite negative electrode material, a preparation method thereof and a graphite negative electrode plate, and belongs to the technical field of graphite negative electrodes. The preparation method comprises the following steps: mixing a dopamine hydrochloride solution with graphite particles, adjusting the pH value to 7.5-8.5, and drying to obtain polydopamine-coated graphite; and mixing the polydopamine-coated graphite, an aluminum salt solution and a lithium-containing compound solution, sequentially carrying out drying and solid-phase reaction to obtain a lithium aluminate modified graphite negative electrode material, and preparing the lithium aluminate modified graphite negative electrode material into a graphite negative electrode plate. The lithium aluminate modified graphite negative electrode material is composed of the graphite particle core and the lithium aluminate shell layer, lithium aluminate has very strong mechanical performance and high thermal stability, not only can protect the graphite material from being corroded by electrolyte, but also can reduce the diffusion energy barrier of lithium ions, limit the volume expansion of the graphite particles and stabilize the SEI film on the graphite surface, so that the lithium aluminate modified graphite negative electrode material can be used for the lithium ion battery. Therefore, the transmission of lithium ions is promoted.

The invention belongs to the technical field of adhesives, and relates to an environment-friendly two-component polyurethane heat-conducting structural adhesive and a preparation method thereof.The heat-conducting structural adhesive comprises the following components in parts by weight: a component A: 5-10 parts of polyether glycol, 15-30 parts of polyaspartic acid ester resin, 1-2 parts of a silane coupling agent and 60-70 parts of heat-conducting filler; the component B comprises the following components in parts by weight: 30-40 parts of polyurethane prepolymer and 60-70 parts of heat-conducting filler; the polyurethane prepolymer is a polymer with a terminal NCO (Nitrogen Carbonate); the volume ratio of the component A to the component B is 1: 1. When the heat-conducting structural adhesive disclosed by the invention is used, the two components are mixed, so that the heat-conducting structural adhesive has excellent heat conductivity, mechanical property, sustainability and flowability, is low in VOC (Volatile Organic Compounds) emission, is beneficial to environmental protection and is suitable for filling and protecting a new energy power battery.

A method for preparing conductive concrete comprises the following steps: firstly, evenly mixing expandable graphite, concrete raw materials and carbon fibers to obtain an initial mixture, then adding water to the initial mixture and stirring to obtain concrete slurry, then curing the concrete slurry to obtain a solidified body, and then heating the solidified body to expand the expandable graphite, thereby obtaining the conductive concrete, and the heating temperature is 200°C-600°C. This design not only has better conductivity and lower production cost, but also can improve mechanical properties, and has a wide range of applications, such as indoor climate control, road deicing or cooking.

The invention relates to a safe lithium battery diaphragm with a high-heat hole-closing function and a preparation method and application thereof, the lithium battery diaphragm is a composite membrane with a multilayer structure, and comprises a bacterial nano cellulose membrane and a composite layer with the heat hole-closing function; wherein the composite layer is prepared from a hot melting material and bacterial nano cellulose. Compared with a traditional commercial polyolefin diaphragm, the lithium battery diaphragm provided by the invention not only has the characteristics of natural three-dimensional nano network structure, good thermal stability, high liquid absorption rate, high ionic conductivity and the like, but also has thermal closed pores and an optional flame-retardant function, so that the safety of a lithium battery is greatly ensured, and the lithium battery diaphragm has a good market application prospect.

The invention relates to the technical field of explosion-proof boxes, in particular to a composite material for an explosion-proof box, a preparation method of the composite material and the explosion-proof box. The composite material for the explosion-proof box is prepared from the following raw materials in parts by weight: 18 to 22 parts of unsaturated polyester, 6 to 10 parts of low-profile shrinking agent, 0.3 to 0.7 part of high-activity initiator, 1.5 to 2.5 parts of internal release agent, 0.2 to 0.6 part of thickening agent, 25 to 35 parts of flame retardant, 30 to 38 parts of glass fiber, 0 to 3 parts of internal coloring pigment and 2.5 to 3.6 parts of auxiliary agent. The explosion-proof box has the advantage of reducing the potential safety hazard of leakage of the explosion-proof box.

The invention discloses a preparation method of a two-property proton exchange membrane with a reticular structure, which comprises the following steps: by taking a sulfonated aromatic polymer as a base material, preparing an amphoteric functionalized proton exchange membrane CS-S with the reticular structure through a cross-linking reaction of a cross-linking agent containing a multi-amino group and the sulfonated aromatic polymer; the amphoteric membranes with different crosslinking structures and crosslinking degrees are prepared by adjusting the variety and dosage of the crosslinking agent; according to the amphoteric membrane, multiple cross-linked side chains are used as base points, linear sulfonated aromatic polymer molecular chains are connected into a net-shaped structure, and the mechanical performance and the chemical stability of the proton exchange membrane are enhanced; an imino basic group on a cross-linked side chain constructs a selective proton transmission channel along the cross-linked side chain through a Donna effect and acid-base interaction between the imino basic group and a sulfonated aromatic polymer chain segment, so that the durability and the ion selective transmission performance of the CS-S two-property proton exchange membrane are improved; the process is simple to operate, low in cost and good in battery performance, is a green and energy-saving production process and is wide in application range.

The invention discloses a sodium metal battery high-voltage fast-charging electrolyte and a preparation method and application thereof, and belongs to the technical field of sodium metal batteries. The electrolyte comprises a sodium salt, an organic ester and linear ether hybrid solvent, the volume ratio of the organic ester solvent to the linear ether solvent in the electrolyte is (3-5): (5-7), and the concentration of the sodium salt is 0.5-1.5 mol L; the organic ester solvent is fluoroethylene carbonate (FEC); the linear ether solvent is one or two of diethylene glycol dimethyl ether (DEGDME) and tetraethylene glycol dimethyl ether (TEGDME); and injecting the electrolyte into the sodium metal battery to obtain the high-voltage sodium metal battery. The high-voltage fast-charging electrolyte provided by the invention has a 5V electrochemical window, a sodium fluoride-rich solid electrolyte membrane with high ionic conductivity and strong mechanical property is formed in situ in the charging and discharging process, and continuous decomposition of a solvent can be inhibited, so that the energy density and the cycling stability of a battery are remarkably improved, and the fast-charging performance of the sodium metal battery is met.

A method for preparing conductive concrete with high mechanical properties, firstly bonding multiple expandable graphite particles on the outer periphery of conductive fibers, then standing to wait for bonding and curing to obtain graphite fibers, then uniformly mixing multiple graphite fibers with concrete raw materials, then adding water and stirring to obtain concrete slurry, then standing the concrete slurry to cure to obtain a solidified body, then connecting the two ends of the solidified body to a circuit to energize the solidified body, the graphite fibers after energization heat up, the heating temperature is 200℃-500℃, when the expandable graphite particles in the solidified body expand due to heat, the conductive concrete with high mechanical properties can be obtained. This design not only has better interface performance and can improve the mechanical strength of the final product, but also has better conductive effect and lower production cost.

The present invention discloses a fibrinogen-based patch, a preparation method and application thereof, wherein the patch comprises fibrinogen and a stabilizer, wherein some lysine residues of the fibrinogen contain hydrophobic groups; and the stabilizer is used to maintain the activity of the fibrinogen. The preparation method comprises: adding a hydrophobic modification reagent dropwise to a fibrinogen solution, performing dialysis after the reaction, and then freeze-drying to obtain the patch. The patch prepared by the method has excellent mechanical strength and adhesion properties, and its performance is significantly better than that of existing surgical adhesive products and emergency hemostasis products under the same conditions. The patch has good biocompatibility, can be absorbed by the human body, and has great potential in clinical applications.

According to the preparation method of the polypyrrole / hot-pressed melamine sponge aerogel provided by the invention, the polypyrrole is loaded on the hot-pressed melamine sponge in situ by utilizing a pyrrole polymerization reaction, the obtained aerogel can fully utilize the excellent optical performance of the polypyrrole and the porous structure of the hot-pressed melamine sponge, and the polypyrrole / hot-pressed melamine sponge aerogel is prepared. The preparation of the polypyrrole / hot-pressed melamine sponge aerogel which is high in mechanical property, super-hydrophilic, low in thermal conductivity and high in photo-thermal conversion efficiency is realized. The polypyrrole / hot-pressed melamine sponge aerogel prepared by the method provided by the invention can be applied to solar evaporation in saline water, actual seawater or heavy metal wastewater so as to obtain a clean water source.

The invention relates to a preparation method of a covalent organic framework reinforced hydrogel material, and belongs to the technical field of hydrogel material preparation. Comprising the following steps: (1) adding an aldehyde monomer into an organic solvent to obtain a phase A; (2) dispersing an amino monomer in a solvent to obtain a phase B; (3) continuously adding a high-molecular polymer into the phase B to obtain a phase C; and (4) adding the phase A into the phase C, and stirring for reaction to obtain the covalent organic framework reinforced hydrogel. The preparation method comprises the following steps: physically mixing an amino monomer and a high-molecular polymer, reacting an aldehyde monomer with the amino monomer in the mixed product, and carrying out one-step in-situ synthesis to obtain the covalent organic framework reinforced hydrogel material, so that the preparation method has the characteristics of simplicity and rapidness in operation, high synthesis efficiency, controllable process and low cost; the problems that the efficiency of traditional COF enhanced high-molecular polymer is low and non-free radical polymerized high-molecular hydrogel cannot be enhanced are solved.

The invention relates to the technical field of bandlet rings, in particular to a bandlet ring with balanced stress at a sewing position and a manufacturing method of the bandlet ring. A split braid is arranged at the side end part of the combined braid; a first group of warps, a second group of warps, a first group of wefts and a second group of wefts are arranged in each of the combined braid and the split braid; the first group of warps, the second group of warps, the first group of wefts and the second group of wefts are jointly woven to form a combined braid, the split braid is divided into an upper braid and a lower braid, the upper braid is formed by weaving the first group of warps and the first group of wefts, and the lower braid is formed by weaving the second group of warps and the second group of wefts; the flat belt ring manufactured by the invention obviously has a smoother appearance, and through comparison tests, the mechanical property of the flat belt ring is obviously improved under the conditions of the same yarn material, specification and dosage and the same finished product gram weight; during batch production, the process is easier to realize alignment table conversion, and the production efficiency is higher.

The present invention relates to the technical field of automobile insulating coatings, and in particular to an automobile insulating coating and a preparation method thereof. The automobile insulating coating comprises the following raw materials in parts by weight: 80-100 parts of modified acrylic resin, 15-18 parts of modified silicon dioxide, 2-3 parts of dispersant, 0.5-0.7 parts of defoamer, 0.3-0.5 parts of leveling agent, and 80-100 parts of deionized water. The present invention also provides a preparation method of the insulating coating, and the obtained coating has good insulation and excellent water resistance, wear resistance and impact resistance.

The present application relates to a gas diffusion layer and a preparation method thereof, and belongs to the field of fuel cell technology; the gas diffusion layer comprises carbon fiber, a conductive agent and a hydrophobic agent, the carbon fiber is distributed in a porous skeleton to form a carbon fiber skeleton, and the conductive agent and the hydrophobic agent are attached to the carbon fiber skeleton; the gas diffusion layer takes carbon fiber as a substrate, and adds a conductive agent and a hydrophobic agent, so that the conductivity and drainage performance of the GDL are more excellent, and it has stronger mechanical properties. Compared with the traditional GDL, it does not have a GDB layer and an MPL layer, which makes it thinner, and the internal resistance of the body and the internal resistance between it and the CCM are both smaller. When applied to a membrane electrode, the gas distribution during the operation of the membrane electrode is more reasonable, which broadens the operating range of the membrane electrode, and thus can take into account the performance of the membrane electrode at high humidity and low humidity.