4934 results about "Imide" patented technology

The invention belongs to the technical field of gel materials, and particularly relates to aerogel powder for polyolefin modification and a preparation method and application thereof. The preparation method of the aerogel powder comprises the following steps: (1) preparing aramid nanofiber dispersion liquid; (2) preparing a polypyrrole coated aramid nanofiber dispersion liquid; (3) mixing polyamide acid and the polypyrrole coated aramid nanofiber dispersion liquid, and then carrying out partial imidization and solvent exchange to prepare hydrogel; and (4) carrying out freeze drying, thermal imidization and crushing to obtain the aerogel powder for polyolefin modification. The aerogel powder is a porous solid material formed by forming one-dimensional composite fibers from aramid nanofibers and polypyrrole and combining the one-dimensional composite fibers with polyimide resin. The aerogel powder and polyolefin resin are compounded to obtain the polyolefin resin composite material with high strength and antistatic property, and the polyolefin resin composite material can be widely applied to the fields of pipes, plates, grouting equipment parts, grouting bags and the like.

The invention provides a preparation method of an h-BN / PI high-temperature-resistant anticorrosive coating, and relates to the technical field of polymer composites.The preparation method of the h-BN / PI high-temperature-resistant anticorrosive coating comprises the steps that under the protection of inert atmosphere, aromatic diamine containing impurity element five-membered rings and aromatic dianhydride containing ether bonds are taken and subjected to a polymerization reaction in a polar aprotic solvent, and the h-BN / PI high-temperature-resistant anticorrosive coating is obtained. A polyamide acid solution is obtained; performing ultrasonic-assisted liquid phase stripping on the micron-sized hexagonal boron nitride to obtain single-layer hexagonal boron nitride; adding the single-layer hexagonal boron nitride into the polyamide acid solution for multiple times, and uniformly stirring to obtain a hexagonal boron nitride / polyimide composite solution; and coating the hexagonal boron nitride / polyimide composite liquid on a to-be-coated surface, and carrying out gradient heating curing to obtain the h-BN / PI high-temperature-resistant anticorrosive coating. The h-BN / PI high-temperature-resistant anticorrosive coating based on interaction of multiple hydrogen bonds has relatively good high temperature resistance, relatively good resistance mechanical property and excellent corrosion resistance.

The invention relates to the technical field of insulating materials, in particular to insulating powder and a preparation method thereof. The invention discloses a flame-retardant coating which comprises the following components in parts by weight: 15-25 parts of epoxy resin, 10-20 parts of aluminum hydroxide, 5-12 parts of nano boron nitride, 1-3 parts of a silane coupling agent KH-560, 3-8 parts of polytetrafluoroethylene micro powder, 2-6 parts of fluorine-modified montmorillonite, 4-9 parts of melamine cyanurate, 2-5 parts of nano titanium dioxide, 1-4 parts of a fluorine-modified graphene oxide-polyaniline composite material and 0.5-2 parts of pentaerythritol stearate. The anti-corrosion coating is prepared from the following components in parts by weight: 1 to 3 parts of nano zinc oxide, 5 to 10 parts of glass fiber, 2 to 5 parts of polyhedral oligomeric silsesquioxane-polyimide copolymer, 1 to 4 parts of ferrocenyl epoxy resin and 0.5 to 2 parts of perfluorooctyltriethoxysilane. The insulation powder is high in corrosion resistance, excellent in insulation, heat dissipation and mechanical performance, environmentally friendly in processing, good in adaptability, capable of prolonging the service life of equipment and reducing the cost, suitable for special environments and wide in popularization prospect.

The invention provides a preparation method and application of a wear-resistant polyimide material, and the preparation method comprises the following steps: S1, adding a polyimide material into an alkali solution for reaction, cleaning reactants with acid and ethanol, and drying to obtain an activated polyimide material; s2, adding the activated polyimide material into a silane coupling agent solution for reaction, cleaning reactants with ethanol and water, and drying to obtain a modified polyimide material with silicon-oxygen bond active sites on the surface; s3, adding the modified polyimide material with silicon-oxygen bond active sites on the surface into a modified epoxy resin solution, adjusting the pH value to be acidic, and reacting to obtain the wear-resistant modified polyimide material, wherein the modified epoxy resin solution is obtained by reacting a silane coupling agent with acrylate. According to the method, the wear resistance of the polyimide can be improved on the premise that other properties of the polyimide material are not influenced.

The invention discloses a flame-retardant ABS (Acrylonitrile Butadiene Styrene) composition as well as a preparation method and application thereof, and relates to the technical field of high polymer materials. The flame-retardant ABS composition provided by the invention comprises the following components in parts by mass: 50-80 parts of ABS resin; 8 to 12 parts of styrene-acrylonitrile copolymer; 3 to 5 parts of styrene-acrylonitrile-maleic anhydride terpolymer; 2 to 6 parts of a fluorine-containing maleimide copolymer; 5 to 15 parts of graphite nanosheet modified high rubber powder; 12 to 18 parts of brominated flame retardant; 3-7 parts of a phosphorus-based flame retardant; 0.1-1 part of a processing aid; the phosphorus-based flame retardant is prepared from the following components in parts by mass: 80 to 95 parts of diethyl phosphinate; 0.3 to 3 parts of ethyl butyl phosphinate; 0.1 to 2 parts of ethyl phosphonate; and 5 to 20 parts of melamine polyphosphate. The flame-retardant ABS composition prepared by the invention is good in flame retardant property, good in welding strength and low in cost.

The invention discloses a preparation method of a high-temperature-resistant high-strength polyimide composite material, and relates to the technical field of polyimide composites.The preparation method comprises the following preparation steps that S1, a customized silane coupling agent is prepared; s2, preparing a bionic dynamic interface modified reinforcing filler, wherein the modified reinforcing filler is synergistically modified through a bionic coating and a customized silane coupling agent; and S3, preparing a polyimide precursor solution containing the dynamic network. According to the preparation method of the high-temperature-resistant high-strength polyimide composite material, through the integrated design of'customized silane coupling agent + bionic dynamic interface modification + dynamic network-containing polyimide precursor + gradient hot-pressing curing ', the glass-transition temperature of the prepared composite material is greater than or equal to 335 DEG C, the tensile strength is greater than or equal to 208 MPa, and meanwhile, the thermal repair efficiency at 180-250 DEG C is greater than or equal to 87%; the technical bottleneck that high temperature resistance, mechanical strength and repairing performance of the material are difficult to consider at the same time in the prior art is solved.

The invention provides a polyimide multilayer composite membrane material as well as a preparation method and application thereof, and belongs to the technical field of gas separation. According to the method, through collaborative design of a functional support layer, a gradient MOF layer and an ultrathin selection layer structure, the problems of support layer pore seepage, MOF agglomeration, weak interface bonding and the like in an existing composite membrane material are solved. The preparation method comprises the following steps: firstly, carrying out electrostatic spinning on a polyamide acid glue solution, and synchronously introducing dopamine by adopting a chemical imidization method to prepare a functionalized polyimide fiber membrane containing hydroxyl and amino on the surface, so that the mechanical property of a supporting layer and the MOF anchoring capability are remarkably improved; growing MOF layers with different particle sizes on the surface of the fiber membrane by regulating and controlling the concentration gradient of ligand / metal salt and the reaction time, and passivating through a silane coupling agent after each step of growth so as to avoid heterogeneous nucleation and construct a gradient structure; after the MOF gradient layer is subjected to Ar plasma pretreatment to introduce hydroxyl, the ultrathin polyamide selection layer is formed by utilizing interfacial polymerization of fluorine-containing acyl chloride and a macrocyclic amine monomer, and the ultrathin polyamide selection layer is suitable for gas separation work.

The present application relates to the technical field of polyimides and relates to a preparation method for a high-performance polyimide and an application thereof, aiming to solve the problems in the prior art such as numerous side reactions and severe impact on transparency caused by an excessively high imidization reaction temperature during the use of a high-temperature thermal imidization method for the preparation of polyimides. The preparation method comprises: (1) preparing a polyamic acid solution; (2) adding a chemical catalyst and a polyamic acid solution to partially complete an imidization reaction; (3) adding an end group auxiliary agent, performing coating with the solution, heating, and maintaining the heat to complete the imidization reaction; and (4) carrying out high-temperature treatment to obtain a high-performance polyimide. The present application can significantly reduce numerous side reactions present in a traditional imidization reaction, eliminate an adverse effect of high-temperature imidization on the optical performance, greatly improve the mechanical properties, heat resistance, optical performance, etc. of a material, and also achieve both high heat resistance and high transparency.

The invention relates to a foam material, in particular to a polyimide / ionic liquid composite foam material and a preparation method thereof. The polyimide (PI) polymer with a rigid molecular structure and high temperature resistance is successfully synthesized, meanwhile, high-compatibility ionic liquid (ILs) molecules are introduced into adjacent PI molecular chains, the polyimide / ionic liquid composite foam material is formed through supercritical foaming, the foaming capacity is remarkably improved, and the polyimide / ionic liquid composite foam material has excellent performance.

The invention provides a liquid crystal aligning agent, a liquid crystal alignment film, a liquid crystal display element and a manufacturing method of the liquid crystal aligning agent. The liquid crystal aligning agent can obtain a liquid crystal alignment film which has excellent adhesion and can inhibit AC ghosting at a high level. A liquid crystal aligning agent containing a polymer component P containing one or more polymers, a compound C1, and a compound C2, the polymer component P containing at least one polymer p selected from the group consisting of polyimide precursors and polyimides that are imides of the polyimide precursors. Compound C1 is a compound having two or more structures represented by formula (c-1). The compound C2 is a compound represented by formula (c-2).

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

The invention discloses a wide-temperature energy storage aerogel / polymer composite material and a preparation method thereof.The preparation method comprises the steps that oxide aerogel with a three-dimensional skeleton structure is subjected to silanization treatment to obtain hydrophobic oxide aerogel, then the hydrophobic oxide aerogel is dispersed into a solvent to obtain dispersion liquid, and then the dispersion liquid is subjected to ultrasonic treatment to obtain the wide-temperature energy storage aerogel / polymer composite material. The preparation method comprises the following steps: sequentially adding a diamine monomer and an anhydride monomer into a dispersion liquid, reacting under stirring to obtain a polyamide acid precursor solution dispersed with hydrophobic oxide aerogel, carrying out film casting on the polyamide acid precursor solution to obtain a dry film, and carrying out imidization treatment on the dry film to obtain the aerogel / polymer composite material. The obtained aerogel / polymer composite material can still maintain high energy storage performance and stability even at extreme ambient temperature.

The invention discloses a high-strength moisture-proof gypsum board and a preparation method thereof, and relates to the technical field of gypsum board preparation. The high-strength moisture-proof gypsum board is prepared by dipping the surface paper in the composite dipping liquid and then pouring the surface paper and the gypsum core with the waterproof agent, the composite dipping liquid comprises the methoxy vinyl ether copolymer and the epoxy polyoxymethylene dimethyl ether, and the methoxy vinyl ether copolymer is 2, 3, 5-trimethyl-1, 3-pentanediol monoisobutyrate. According to the present invention, epoxy polyoxymethylene dimethyl ether is prepared by reacting 2, 4-dimethoxymethoxyphenylacetic acid with 2-hydroxyethyl vinyl ether, and the epoxy polyoxymethylene dimethyl ether is prepared by terminating polyoxymethylene dimethyl ether with allyl and then reacting with phthalimide hexperoxy acid, such that the waterproofness and the mechanical property of the gypsum board are improved; the waterproof agent is prepared by reacting hydrogen-containing silicone oil and fluorine-containing hyperbranched amide polyurea urethane, so that the moisture resistance and bonding strength of the gypsum board surface paper are enhanced, and additional mechanical support is provided for the gypsum board.

The invention relates to the technical field of aerogel, in particular to flexible flame-retardant aerogel and a preparation method thereof.The flexible flame-retardant aerogel is prepared from modified graphene, modified polyvinyl alcohol, silver nanowires, phytic acid and epoxy resin E-51; the furan group is introduced into the aerogel through the modified graphene, the furan group and the maleimide group are subjected to a D-A reaction, an adhesive is prevented from being used when the aerogel is bonded with a screen backboard, the D-A reaction is reversible, and lossless reworking can be realized. PVA and epoxy resin E-51 are added together, so that the heat resistance and mechanical strength of the material are improved. PVA is grafted with a large-steric-hindrance amine group, weak interaction with a furan group is generated, side reaction with an epoxy group of epoxy resin E-51 is avoided, and when aerogel is bonded to an OLED screen backboard, the protective layer is reversibly released, so that D-A reaction can be smoothly carried out. The hydrophobic treatment of the modified graphene and the modified grafting of the polyethylene to the mPEG can effectively improve the agglomeration of the modified graphene and ensure the uniform dispersion of the modified graphene.

The invention discloses high-performance anti-wear engine lubricating oil as well as a preparation method and application thereof. The high-performance anti-wear engine lubricating oil is prepared from the following raw materials: self-developed lubricating oil base oil, poly-alpha-olefin, zinc dialkyl dithiophosphate, calcium sulfonate, polyisobutylene succinimide, an antioxidant, polymethacrylate, an organic molybdenum complex, a de-foaming agent and a pour point depressant. The preparation method comprises the following steps: 1) synthesizing 9, 10-bis (2-tert-butyl-4-methylphenoxy) trimethylolethane stearate as base oil of the lubricating oil; and 2) mixing the base oil with other assistants to obtain the high-performance anti-wear engine lubricating oil. According to the preparation method, novel-like synthetic ester oil is firstly prepared, a phenol group and a large steric hindrance substituent group are introduced into a polymer, the anti-oxidation function is directly built in base oil molecules, meanwhile, super-strong heat resistance is achieved, and finally the high-performance anti-wear engine lubricating oil is obtained and can be applied to high-end application scenes such as aero-engines or gas turbines.

The invention relates to the technical field of coatings, in particular to an acrylate-epoxy resin composite coating and a preparation method thereof. According to the technical scheme, the coating is prepared from 25 to 35 parts of methyl methacrylate, 15 to 25 parts of butyl acrylate, 10 to 20 parts of epoxy resin E-5110, 8 to 15 parts of organic silicon modified acrylate prepolymer, 5 to 12 parts of fluorocarbon modified epoxy resin, 4 to 8 parts of core-shell structure corrosion inhibition nano container, 1 to 3 parts of functionalized graphene quantum dots and 4 to 10 parts of polyhedral oligomeric silsesquioxane maleimide modified amine curing agent. And 1-3 parts of a hindered amine light stabilizer. By integrating the core-shell structure corrosion inhibition nano container, the functionalized graphene quantum dots and the photo-thermal dual responsive curing agent component, the sensing, response and self-repairing of the coating on damage are realized, and long-acting corrosion resistance, weather resistance, bacteria resistance, mechanical property balance and intelligent maintenance are considered; and efficient and economical full-period protection is provided for equipment in an extreme environment.

Described herein are lithium-metal rechargeable electrochemical cells comprising a lithium-metal negative electrode, a positive electrode, and a liquid electrolyte. The liquid electrolyte comprises a core mixture and a diluent. The diluent comprises a fluorinated ether. The core mixture comprises a set of salts and a set of solvents. The set of solvents comprises a pyrrolidinium-containing ionic liquid and a molecular solvent. The molecular solvent is a non-fluorinated ether, for example including but not limited to 1,2-dimethoxyethane. In some examples, the electrolyte further comprises an electrolyte additive, for example including but not limited to tris(trimethylsilyl)phosphate. In some examples, the set of salts comprises one or more imide-containing lithium salts. In some examples, the set of salts comprises lithium bis(fluorosulfonyl)imide and an additional salt and the mole fraction of lithium bis(fluorosulfonyl)imide in the set of salts is 0.5 or greater.

The invention belongs to the technical field of oil well paraffin removal and prevention, and relates to a paraffin removal and prevention agent for a shale oil shaft and a preparation method thereof. The paraffin remover and inhibitor for the shale oil wellbore comprises the following raw materials in percentage by mass: 40-55% of an oily solvent, 1-3% of a cosolvent, 1-2% of imidazole bis (trifluoromethanesulfonyl) imide salt, 10-20% of a wax crystal modifier, 3-5% of an emulsifier, 1-2% of an alkaline regulator and 25-35% of water, wherein the sum of the mass percentages of the raw materials is 100%. The wax crystal modifier is prepared by copolymerizing (methyl) acrylic acid C12-C16 ester, (methyl) acrylic acid C1-C3 ester and (methyl) acryloyl chloride and then reacting with C20-C30 alkyl alcohol. The wax crystal modifier provided by the invention has long-medium-short branched chains, and interacts with the imidazole bis (trifluoromethanesulfonimide) salt capable of improving the paraffin removal effect and low-temperature fluidity, so that the efficient paraffin removal and inhibition effect is realized, and the better paraffin removal and inhibition effect can still be kept at low temperature.

The invention discloses an insulated wire, a coil and electronic / electrical equipment, and relates to the technical field of insulated wires. The modified polyamide-imide insulating layer is composed of an insulating material obtained by reacting diisocyanate with mixed anhydride, wherein the mixed anhydride comprises short-chain anhydride and long-chain anhydride. According to the insulated wire coated with the polyamide-imide insulating layer, the wire flexibility is improved, the insulated wire is suitable for closer arrangement of complex groove types, and then the motor groove fullness rate is improved, so that the size of a stator iron core is reduced under the same power, the motor weight is indirectly reduced, and the requirement for light weight is met.

The invention discloses a high-oxidation-resistance long-life polyethylene cable sheath material and a preparation method thereof, and relates to the technical field of high polymer materials. Comprising the following components: high-molecular-weight high-density polyethylene, surface-modified nano-dioxide, furan-maleimide grafted polyethylene, a Schiff base dynamic cross-linking agent, tea polyphenol grafted polyethylene, a temperature-responsive oxygen-blocking microcapsule, a main antioxidant, an auxiliary antioxidant, an emergency antioxidant, a light stabilizer, a halogen-free flame retardant, a processing aid and an acid absorbent. According to the invention, the main antioxidant, the auxiliary antioxidant and the tea polyphenol grafted polyethylene form a chemically synthesized and naturally modified composite antioxidant system, the designed service life of the material is greatly prolonged, the temperature-responsive oxygen-blocking microcapsule automatically cracks to release the core material when the operating temperature of the cable is greater than or equal to 90 DEG C, a dynamic oxygen-blocking layer is formed, and the service life of the cable is prolonged. The defect that the effect of traditional physical oxygen barrier is attenuated at high temperature is overcome, and the oxygen permeability at high temperature is reduced compared with that of a single nano barrier scheme.

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

The invention belongs to the technical field of biological materials and ultrasonic printing, and particularly discloses a biological adhesive for ultrasonic printing and preparation and application thereof. The biological adhesive comprises a heat-sensitive main body material and a chemical adhesion component, the heat-sensitive main body material comprises hydroxybutyl chitosan, and the chemical adhesion component comprises polyacrylic acid-N-hydroxysuccinimide ester. The bioadhesive has excellent ultrasonic responsiveness, formability and bioadhesion performance, directional deposition, in-situ solidification and tissue surface adhesion can be achieved in a non-contact and accurately-controlled ultrasonic printing system, and the bioadhesive is suitable for various biomedical scenes such as tissue repair, minimally invasive medicine, biological device construction and drug delivery interface printing.

The invention relates to the technical field of new material application, and discloses a magnetic bead material for enriching a sulfydryl peptide fragment and a preparation method thereof.The magnetic bead material prepared from micron carboxyl magnetic beads, dodecane dicarboxylic acid dihydrazide and SPSP has a long chemical reaction connecting arm, so that a reaction group has the better freedom degree, the reaction with sulfydryl is better facilitated, and the magnetic bead material can be used for enriching the sulfydryl peptide fragment. The enrichment efficiency is relatively high. When the magnetic bead material is prepared, micron carboxyl magnetic beads and dodecane dicarboxylic acid dihydrazide are based on hydrazine group and carboxyl condensation, the condensation reaction is more selective and more stable, the reaction is carried out under a milder condition, the reaction product is stable, and the reaction efficiency is higher at a lower reaction temperature. Dodecane dicarboxylic acid dihydrazide and SPSP are based on a reaction of N-succinimide and hydrazine, N-succinimide has high specificity to amino-containing molecules, side reactions are reduced, the reaction is generally carried out at room temperature, strong acid and alkali conditions are not needed, and protection of other sensitive groups is facilitated.

The invention discloses a preparation method of an insulated wire. Specifically, the method comprises the following steps: annealing a rolled conductor to obtain an annealed conductor; the periphery of the annealed conductor is coated with insulating paint to form a first prefabricated core wire, the first prefabricated core wire coated with the insulating paint is subjected to high-temperature curing to form an insulating layer, and a second prefabricated core wire is obtained; the outer side of the insulating layer of the second prefabricated core wire is coated with finish paint containing a modified polyamide-imide intermediate to form a third prefabricated core wire, the third prefabricated core wire coated with the finish paint is subjected to high-temperature curing to form a finish paint layer on the outer side of the insulating layer, and the insulated wire is further obtained. The insulated wire provided by the invention improves the wire flexibility, adapts to closer arrangement of complex slot types, and further improves the slot fullness rate of a motor, thereby reducing the size of a stator core under the same power, indirectly reducing the weight of the motor and meeting the requirement of light weight.

The application provides a crosslinked polyethylene insulating material with intrinsic self-repairing and recyclable characteristics, a preparation method and application thereof, and relates to the technical field of cable materials.The crosslinked polyethylene insulating material with intrinsic self-repairing and recyclable characteristics is prepared from the following components in parts by weight: 99.7 parts by weight of low-density polyethylene, 1.0-2.6 parts by weight of peroxide, 0.1-0.5 parts by weight of antioxidant, 5-20 parts by weight of maleimide monomer, 0.35-0.7 parts by weight of catalyst, 0.5-3.0 parts by weight of ligand and 0.5-3.0 parts by weight of furan-based small molecule.The low-density polyethylene is functionally modified through catalytic amination reaction, so that the chain breaking and crosslinking in the modification process are avoided, and the mechanical properties, insulating properties and dielectric properties of the crosslinked polyethylene are enhanced through the post-absorption of the introduced peroxide.Meanwhile, the dynamic reversible Diels-Alder reaction introduced by the post-absorption of the furan-based small molecule enables the polyethylene insulating material to have good intrinsic self-repairing effect on mechanical damage and electrical damage.

The invention discloses a polyetherimide / polyaryletherketone composite material with high breakdown performance and mechanical toughness as well as a preparation method and application of the polyetherimide / polyaryletherketone composite material, and belongs to the technical field of polyetherimide insulation. The invention solves the problems that the dielectric constant of the polyetherimide can be improved by increasing the use amount of the conductive filler in the prior art, but the breakdown performance of the polyetherimide is reduced, so that the polyetherimide cannot have toughness and high breakdown performance at the same time. According to the invention, polyetherimide and polyaryletherketone are used as raw materials and are mixed by adopting a solution blending method, then a substrate is coated with the mixture, and the polyaryletherketone / polyetherimide / polyaryletherketone composite material is obtained through curing. According to the invention, polyetherimide and polyaryletherketone are well dispersed on a microscopic scale, and the composite material has low dielectric loss of polyetherimide and high toughness of PAEK, and has good dielectric properties and breakdown electrical strength; the material is suitable for the advanced fields of high-energy density capacitors, power electronic devices, aerospace electrical insulation parts, new energy automobile high-voltage systems and the like.

The invention relates to a high-temperature-resistant polymer binder and a preparation method thereof. The binder is composed of a mixture of resin containing a siloxane unit polyimide main chain and an epoxy group side chain and tannic acid. Wherein the main chain containing siloxane and imide units endows the adhesive with excellent heat-resistant stability, excellent processability and excellent adhesion with glass and ceramic materials, and the adhesive can be cured at room temperature through the epoxy side group; the mixed tannic acid can form strong interface bonding with a polymer film and a metal material through a multiple hydrogen bond network, so that the tannic acid has important application prospects in the fields of semiconductor packaging, thermal interface materials and the like.

The invention relates to the technical field of wire and cable materials, and discloses a high-temperature-resistant and aging-resistant wire and cable material and a preparation method thereof.The high-temperature-resistant and aging-resistant wire and cable material is prepared from, by weight, modified polyetherimide, silane modified polyolefin, organic montmorillonite, surface modified nanometer aluminum oxide and surface functionalized graphene, an antioxidant, a silane coupling agent and a processing lubricant; the preparation method of the high-temperature-resistant and aging-resistant wire and cable material comprises the following steps: weighing and preparing raw materials; carrying out surface modification treatment on the nanofiller; drying the raw materials; premixing the components; reacting, extruding and granulating; and cooling, bracing and dicing. By adopting the technical scheme of synergistic application of the surface functionalized graphene and the silane modified polyolefin, the technical effect of remarkably improving the thermal stability and the mechanical property of the composite material is achieved, the problem that the performance of a traditional scheme is unstable at high temperature is solved, and the phenomena of filler agglomeration and material degradation are avoided.

The invention relates to the technical field of epoxy resin, in particular to self-repairing epoxy resin and a preparation method thereof. The self-repairing epoxy resin is prepared from the following raw materials in parts by mass: 80 to 120 parts of bisphenol A type epoxy resin, 20 to 40 parts of bisphenol F type epoxy resin, 5 to 15 parts of 1, 6-hexanediol diglycidyl ether, 1 to 3 parts of 3, 5-dimethylphenylboronic acid, 1 to 5 parts of furyl maleimide, 10 to 20 parts of dodecanedioic acid, 5 to 15 parts of butanetetracarboxylic acid, 1 to 3 parts of catalyst, 10 to 15 parts of nano silicon dioxide, 1 to 2 parts of boron nitride nanosheet and 1 to 2 parts of hyperbranched polyamidoamine. The curing agent is prepared from the following components in parts by weight: 20-30 parts of epoxy resin, 1-2 parts of sulfydryl-terminated polysiloxane, 20-30 parts of amine curing agent, 5-15 parts of reinforcing filler and 0.5 According to the invention, the balance among self-repairing capability, mechanical property and heat resistance is successfully realized; in the microcrack propagation process, fracture and recombination mechanisms of dynamic covalent bonds effectively prevent further propagation of cracks.

The invention belongs to the technical field of aerogel, and particularly relates to polyimide aerogel for 3D printing as well as a preparation method and application of the polyimide aerogel. According to the preparation method disclosed by the invention, the polyaniline with a curved surface structure is prepared by taking ice micro powder as a synthesis template of an aniline monomer, and the polyaniline / polyimide composite aerogel is prepared by adopting a polyamide acid in-situ compounding method. The polyaniline with the curved surface structure is a three-dimensional conductive unit, and when the polyaniline is dispersed in a polyimide matrix, the curved surface structures can be in contact with one another, so that an efficient three-dimensional conductive network is constructed in the composite material. The curved surface structure has a relatively large specific surface area, so that a relatively large contact area is formed between polyaniline and a polyimide matrix, stress is favorably transferred from the matrix to a filler, the polyaniline with the curved surface structure is favorably prevented from being agglomerated in the matrix, the polyaniline is more uniformly distributed, and the flexibility of the polyimide aerogel is improved.