714 results about "Heat curing" patented technology

The embodiment of the invention provides a UV (ultraviolet) thermal dual-curing adhesive and a preparation method thereof. The UV thermal dual-curing adhesive comprises the following components in percentage by mass: 30-55% of a photocuring prepolymer; 5%-25% of an active diluent monomer; 1%-10% of a photoinitiator; 1%-20% of a thermal initiator; 10%-40% of a filler; 0.5%-5% of a coupling agent; 1%-10% of a thixotropic agent; 1%-10% of pigment; 2%-8% of an auxiliary agent; wherein the photocuring prepolymer comprises epoxy resin. According to the UV thermal dual-curing adhesive and the preparation method thereof provided by the embodiment of the invention, the dual-curing adhesive with low shrinkage and low thermal expansion coefficient is obtained by optimizing the structure of the photocuring prepolymer and matching the components, and the prepared adhesive can be rapidly cured under the irradiation of LED 365nm ultraviolet light, or can be thermally cured under the low-temperature condition of 80 DEG C, so that the UV thermal dual-curing adhesive can be widely applied to the field of ultraviolet curing. The product can resist high and low temperature cycle impact of-50 DEG C to 140 DEG C, and has a good application prospect.

The invention relates to the technical field of polyurethane acrylate, and particularly discloses dual-curing polyurethane acrylate resin and a preparation method thereof. Wherein the dual-curing polyurethane acrylate resin is prepared from the following raw materials: polyester polyol, polyether polyol, diisocyanate, hydroxyl acrylate, a chain extender, a photoinitiator, cardanol glycidyl ether, a polymerization inhibitor and modified nanoparticles. Wherein the citric acid and the polyethyleneimine are adopted to carry out synergistic modification on the nano particles, the dispersion stability of the nano particles is improved, so that the mechanical property of the resin is improved, the cardanol glycidyl ether and the photoinitiator generate a synergistic effect, and the resin can be quickly shaped through photocuring promoted by the photoinitiator; the cardanol glycidyl ether participates in the subsequent thermocuring reaction, so that the curing effect is improved, and the adhesive force between the film layer and the base material is enhanced.

The invention discloses a preparation method of a composite micro-groove super-hydrophobic low-ice-adhesion photo-thermal film. The preparation method comprises the following steps: (1) constructing a low-elasticity-modulus photo-thermal composite sponge substrate through a solvothermal method; (2) uniformly coating the surface of a substrate with a polydimethylsiloxane (PDMS) precursor solution by adopting an aerosol-assisted deposition technology, and carrying out thermocuring to form a functional composite interface layer; and (3) constructing a multi-stage scallop surface-imitating micro-nano groove composite structure on the surface of the interface layer by using a femtosecond laser micro-nano processing technology. The prepared film has super-hydrophobicity, the surface of the film is in a Cassie-Baxter wetting state with a 164-degree contact angle and a 1-degree rolling angle, and the film has a surface self-cleaning function. Under the icing condition, the adhesion strength of an ice layer of the system is obviously reduced to 2.57 kPa, the static delay icing time is effectively prolonged to 1587 s, and the system has the photo-thermal response characteristic and can realize rapid icing ablation under the standard solar irradiance; the preparation method has the characteristics of high process controllability, environment friendliness and the like, and is suitable for large-scale continuous production.

Provided is a heat-curable acrylic resin composition which is capable of suppressing the generation of ultra-fine bubbles when cured under heat and pressure, and which has excellent adhesiveness. A thermosetting acrylic resin composition which contains (A) an acrylic copolymer having a carboxyl group and (B) a phenolic resin, and which is characterized in that: when the acrylic copolymer (A) is an acrylic copolymer (A-1) having a glass transition temperature of-35 DEG C or less, the phenolic resin (B) is a phenolic resin; the thermosetting acrylic resin composition contains a specific content of an epoxy curing agent (C-1), contains a specific content of a novolac phenolic resin (B-1) or a self-crosslinking phenolic resin (B-2) as the phenolic resin (B), and contains a specific content of a novolac phenolic resin (B-1) or a self-crosslinking phenolic resin (B-2) when the novolac phenolic resin (B-1) is contained as the phenolic resin (B). The thermosetting acrylic resin composition also contains a specific content of an amine curing agent (C-2).

The invention discloses a dual-curing solvent-free high-temperature-resistant epoxy resin structural adhesive as well as a preparation method and application thereof. The structural adhesive comprises the following components in percentage by weight: 1.5-5% of a latent curing agent, 2-5% of a high-heat-resistant curing agent, 1-5% of nano filler, 0.1-0.3% of a curing accelerator and the balance of epoxy resin. By accurately screening epoxy resin monomers, optimizing a dual curing agent system and introducing the high-temperature-resistant nanofiller, room-temperature stability, medium-temperature rapid curing and gelling and high-temperature complete curing are realized, and the final heat-resistant temperature is greater than or equal to 300 DEG C. Through the synergistic effect of the epoxy resin, the medium-temperature curing agent and the high-temperature curing agent, the crosslinking stability at different temperature stages is ensured. In addition, through introduction of the inorganic nano filler, the high-temperature mechanical property and the heat-resistant stability of the material are further improved. The preparation method does not need to use a solvent, and the prepared epoxy resin structural adhesive has excellent heat resistance and mechanical strength and is suitable for the fields of high-temperature structural adhesives, aerospace composite materials, high-temperature-resistant coatings and the like.

The invention discloses a continuous aramid fiber reinforced epoxy resin composite material and a preparation method thereof, and belongs to the technical field of composite materials. The composite material is obtained by heating and curing continuous aramid fibers modified by a benzoxazine-containing waterborne polyurethane emulsion sizing agent and epoxy resin, the waterborne polyurethane emulsion sizing agent containing benzoxazine is prepared from diisocyanate, long-chain diol, 2, 2-dimethylolpropionic acid, dihydric alcohol containing benzoxazine and triethylamine according to the molar ratio of 1: (0.1 to 0.5): (0.1 to 0.3): (0.3 to 0.4): (0.1 to 0.3) through reaction. The benzoxazine-containing waterborne polyurethane sizing agent is used for modifying the aramid fibers, and benzoxazine is crosslinked with the aramid fibers and the epoxy resin during ring opening polymerization, so that the interface bonding property between the aramid fibers and the epoxy resin can be remarkably improved, and the mechanical property of the composite material can be effectively improved; the application field of the aramid fiber composite material is expanded.

The present invention relates to a UV anti-viscosity tape and a preparation method thereof, and belongs to the technical field of adhesive tapes. The UV anti-viscosity tape comprises a first anti-viscosity adhesive layer and a second anti-viscosity adhesive layer, wherein the first anti-viscosity adhesive layer comprises 20-70 parts of an acrylic resin containing a carbon-carbon double bond, 0.4-2 parts of a photoinitiator, 0.01-0.1 parts of a thermosetting agent, and 50-100 parts of an organic solvent in parts by mass; the second anti-viscosity adhesive layer comprises 0.1-3 parts of an active diluent containing a carbon-carbon double bond, 20-70 parts of an acrylic resin containing a carbon-carbon double bond, 0.4-2 parts of a photoinitiator, 0.01-0.1 parts of a thermosetting agent, and 50-100 parts of an organic solvent in parts by mass; the weight average molecular weight of the acrylic resin containing a carbon-carbon double bond is 300,000-700,000; the glass transition temperature is ‑50°C to ‑10°C; and the carbon-carbon double bond content is 0.1-0.3 mmol / g. The anti-viscosity tape not only meets the requirement of convenient chip picking, but also solves the problem of chip contamination caused by separation of the anti-viscosity adhesive layer and the substrate.

The invention relates to the technical field of fluorosilicone materials, in particular to a glass fiber sleeve with an excellent voltage resistance function and a preparation method of the glass fiber sleeve. The glass fiber sleeve with the excellent voltage-resistant function comprises a glass fiber sleeve and a composite coating coated on the outer side of the glass fiber sleeve, the composite coating is obtained by thermocuring a coating material; the coating material is prepared from the following raw materials in parts by mass: 50 to 100 parts of fluorinated silicone rubber emulsion, 1 to 5 parts of bis (3-aminopropyl) terminated polydimethylsiloxane, 0.5 to 1.5 parts of furfuryl alcohol resin, 1 to 5 parts of epoxy resin, 1 to 5 parts of activated nano silicon dioxide, 1 to 3 parts of boron nitride nanowire, 1 to 2 parts of dopamine hydrochloride, 1 to 2 parts of dispersing agent and 10 to 30 parts of solvent. The invention can effectively ensure that the coating forms a compact cross-linked structure in the curing process, and can enhance the adhesive force of the coating, weaken the temperature difference between the surface and the interior, inhibit the heat accumulation effect and delay the degradation of the insulating property.

The invention discloses a micro-conductive polyimide coating diaphragm with an energy slow release function, the micro-conductive polyimide coating diaphragm comprises a porous base material and a composite coating coated on at least one side of the porous base material, the composite coating comprises the following components: a polyimide matrix and modified carboxylated carbon nanotubes, and the modified carboxylated carbon nanotubes are uniformly dispersed in the polyimide matrix; the porosity of the composite coating ranges from 40% to 60%, the average pore size ranges from 0.1 micrometer to 0.5 micrometer, the pore size is distributed in a gradient mode in the thickness direction, the pore size of the surface layer is smaller than or equal to 0.2 micrometer, and the pore size of the bottom layer is larger than or equal to 0.4 micrometer. The invention also discloses a preparation method of the micro-conductive polyimide coating diaphragm with the energy slow release function. Flame retardance is achieved through a gas phase-condensation phase synergistic mechanism, a three-dimensional conductive network is constructed, performance conflicts are avoided through in-situ polymerization chemical bonding, and dendrite blocking and ion transmission efficiency are both considered through gradient aperture design. And through the one-step spraying and thermocuring process, uniform attachment of the submicron coating is achieved, and the process is simplified.

The invention provides a photo-thermal dual-curing resin composition, a preparation method and application thereof and a damping elastomer, and relates to the technical field of elastic materials. The photo-thermal dual-curing resin composition is prepared from the following components in parts by weight: 45 to 65 parts of polyurethane acrylate oligomer, 4 to 8 parts of epoxy resin, 18.7 to 27.56 parts of diluting monomer, 1 to 1.4 parts of photoinitiator, 6 to 8.5 parts of curing agent and 2 to 2.4 parts of functional filler, wherein the polyurethane acrylate oligomer is prepared from the following components in parts by weight: 10 to 21 parts of soft oligomer, 20 to 30 parts of medium hard segment oligomer and 15 to 20 parts of hard oligomer. According to the resin composition, the damping performance of the material is remarkably improved, the photocuring forming efficiency and the thermocuring crosslinking depth are both considered, the whole system is smaller than or equal to 7500 mPa.s at the temperature of 20 DEG C, and the resin composition is suitable for the 3D printing process.

The invention discloses a full-polyester whole-core flame-retardant conveying belt and a preparation method thereof, and relates to the technical field of conveying belts. The conveying belt comprises a three-layer structure, wherein the inner layer is a plasma-treated full-polyester fiber belt core, the middle layer is a polyurethane flame-retardant composite layer, and the outer layer is a maleic anhydride modified nitrile rubber layer. The preparation method comprises the following steps: carrying out argon plasma treatment on the belt core, drying, preparing waterborne polyurethane resin, a phosphate flame retardant, nano-montmorillonite, a silane coupling agent and carbodiimide into impregnation liquid, carrying out vacuum impregnation on the belt core, and carrying out thermocuring to form the polyurethane composite layer, and finally, mixing the maleic anhydride grafted and modified nitrile rubber with an aluminum hydroxide flame retardant, and covering and vulcanizing. Through plasma activation, interface chemical bonding and a synergistic flame-retardant system, the product has excellent flame retardance and mechanical strength, and meanwhile the problem that layers of a traditional conveying belt are prone to layering is solved.

The invention belongs to the technical field of high polymer materials, and particularly relates to a self-repairing paint surface protection film based on asynchronous curing. The self-repairing paint surface protection film comprises a UV curing layer, a thermocuring layer and a base film, the thermocuring layer is positioned between the base film and the UV curing layer; the thermocuring layer is prepared from the following components: Zn-MOFs (Metal-Organic Frameworks) modified polycarbonate polyol resin and isocyanate; the UV curing layer is prepared from the following components: a fluorine-containing acrylate oligomer, KH-560 modified nano TiO2 and a photoinitiator; furthermore, the thermocuring layer further comprises a microencapsulation repairing agent. Correspondingly, the invention further provides a preparation method of the self-repairing paint surface protection film based on asynchronous curing. Self-repairing and weather resistance of the protective film are compatible, the problem that a single curing coating or a traditional synchronous curing coating cannot give consideration to self-repairing, weather resistance, water resistance, stain resistance and mechanical properties is solved, the highest elongation at break is larger than or equal to 320%, and the elongation at break is remarkably improved compared with the elongation at break of a single thermocuring system.

The invention discloses epoxy vinyl ultraviolet curing resin and a preparation method thereof, and belongs to the technical field of epoxy resin materials.The preparation method comprises the following steps that fluorine-containing alicyclic epoxy resin, thiol-alkene functionalized vinyl acid, coumarin modified styrene, a prepolymer, an active prepolymer and nanoscale dispersion liquid are sequentially prepared; and carrying out nano synergistic modification, thermal activation component introduction, gradient photo-thermal synergistic curing and super-hydrophobic surface optimization to obtain the epoxy vinyl ultraviolet curing resin. According to the invention, through ternary compounding of coumarin modified styrene, thiol-alkene functionalized vinyl acid and fluorine-containing alicyclic epoxy resin and synergistic effect of the three components and a gradient photo-thermal curing process, the problems of excessive cross-linking brittleness of a surface layer, insufficient curing and weak bonding of an inner layer, permeation of a medium along defects and the like are synchronously solved; systematic improvement of strength, cohesive force and corrosion resistance is achieved.

The invention discloses an intelligent hydrogen sulfide-resistant anticorrosive coating for a coal chemical industry pipeline and a preparation method, and belongs to the technical field of corrosion prevention of coal chemical industry pipelines. The coating is composed of a base material, a functional filler, an intelligent component and an auxiliary agent, the base material improves the mechanical property and chemical stability, the functional filler enhances the hydrogen sulfide corrosion resistance, and the intelligent components achieve the self-repairing function of the coating. The preparation method comprises the steps of microcapsule preparation, component mixing, ultrasonic dispersion, coating and thermocuring. The corrosion resistance of the coating is greater than or equal to 95% under the environment of 80 DEG C, 90% humidity and 1000ppm H2S, the adhesive force reaches grade 1, the tensile strength is 10-20MPa, and the elongation at break is 200-300%. The high-corrosion-resistance and self-repairing pipeline protection material has high corrosion resistance, self-repairing capacity and construction convenience, and is suitable for pipeline protection in a high-concentration hydrogen sulfide environment.

The invention belongs to the technical field of preparation of soft magnetic composite materials, and particularly relates to an insulation coating method and application of a soft magnetic powder material. The insulating coating method comprises the following steps: (1) uniformly mixing low-melting-point metal or alloy powder with silica sol, a silane coupling agent and a thermocuring resin glue solution to obtain coating slurry; and (2) uniformly mixing soft magnetic powder with the coating slurry obtained in the step (1), firstly performing hot-pressing curing molding at the temperature of 60-100 DEG C under a vacuum condition, and then performing hot-pressing sintering treatment at the temperature higher than the melting point temperature of low-melting-point metal or alloy powder and under an oxygen-containing atmosphere condition to obtain the insulated and coated soft magnetic powder material. According to the insulating coating method, the advantages of an organic material insulating coating method and an inorganic material insulating coating method are combined, the defects of the organic material insulating coating method and the inorganic material insulating coating method are overcome, and the stability and the insulating coating effect of the insulating coating layer are remarkably improved.

The invention discloses a forming processing method of a composite material gas cylinder, which comprises the following steps of: positioning and embedding a pre-processed metal valve seat into a cavity of an injection mold, and performing high-pressure injection molding to form a lining pre-formed body wrapping the metal valve seat; and transferring the liner preform to blow molding equipment for blow molding integrated molding to prepare the gas cylinder liner which is integrated with the metal valve seat in a weldless manner, zero in interface gap and high in bonding strength. The method comprises the following steps: calculating laying parameters of a composite gas cylinder winding layer by adopting a grid theory on the basis of a dry-method prepreg yarn principle, and obtaining a laying layer design scheme; laying a carbon fiber winding layer on the outer surface of the gas cylinder lining subjected to surface treatment according to a laying design scheme based on a dry-method prepreg yarn winding technology; and the high-pressure composite material gas cylinder product is obtained through cooperative treatment of heating curing and mold pressing. The problems that the precision requirement of a traditional technology is difficult to meet and labor cost is high are solved.

The invention belongs to the technical field of supporting films, and particularly relates to an acrylate pressure-sensitive adhesive, a supporting film adhesive tape, a preparation method and application. The acrylate pressure-sensitive adhesive is prepared from the following raw materials in parts by weight: 60 to 90 parts of acrylate soft monomer, 5 to 20 parts of polar functional monomer, 5 to 20 parts of high-Tg hard monomer, 0.1 to 0.5 part of initiator, 0.5 to 3 parts of polyfunctional thermocuring cross-linking agent and a proper amount of solvent. According to the acrylate pressure-sensitive adhesive disclosed by the invention, the acrylate pressure-sensitive adhesive which has the characteristics of low modulus and high cohesion microcosmically is prepared under a solution polymerization and thermocuring process through a specific'soft monomer-hard monomer-crosslinking agent 'formula system design. The pressure-sensitive adhesive macroscopically realizes the performance balance, which is difficult to realize at the same time, among adhesion, buffering and impact resistance.

The invention provides a carbon fiber induction heating closed-loop intelligent control system and method, and relates to the technical field of carbon fiber processing equipment, and the system comprises an unwinding device, a dipping device, a heating curing device, a winding device and a rack; the unwinding device, the dipping device, the heating and curing device and the winding device are all arranged on the rack; the unwinding device comprises an unwinding servo motor, an unwinding roller and a first guide roller; the dipping device comprises a dipping tank, a second traction roller and a first traction roller; liquid resin is contained in the dipping tank, and the dipping tank is used for carrying out resin coating and preliminary infiltration on carbon fibers; the heating and curing device comprises a shell, an iron core, a conductive roller, an insulating roller, a magnet exciting coil and a sensor group; the iron core, the conductive roller, the insulating roller, the magnet exciting coil and the sensor group are all arranged in the shell; the excitation coil is sleeved on the iron core; the insulating roller and the conductive roller are used for clamping carbon fibers; the winding device comprises a winding servo motor, a winding roller and a second guide roller.

The invention relates to the technical field of adhesives, discloses an adhesive composition with an extreme environment-resistant photo-thermal dual-curing structure, and solves the problems that in the existing photo-thermal dual-curing technology, a photo-curing network formed in the early stage has physical limitation on a later-stage thermal curing reaction due to the curing time sequence difference of first light and then heat, and the service life of the photo-thermal dual-curing structure is prolonged. According to the method, a latent heat curing agent is coated in a photolysis microcapsule, and a latent heat release agent of which the decomposition temperature is lower than the activation temperature of the curing agent is blended in a wall material of the microcapsule. Therefore, the problems of physical limitation and internal stress concentration caused by a previous photocuring network to a later thermocuring reaction in a traditional photo-thermal dual-curing adhesive are solved, and the long-term reliability of bonding is improved.

The invention provides PMMA (polymethyl methacrylate) liquid resin with a flame-retardant function and a preparation method of a ship based on a PMMA liquid resin continuous fiber composite material, and belongs to the technical field of polymer composite material preparation. According to the invention, the continuous fiber material is uniformly laid in the mold, and a vacuum assisted resin transfer molding (VARTM) process is adopted to ensure that the material is fully infiltrated and bubbles are eliminated. The PMMA liquid resin and the continuous fibers are fully combined through normal-temperature curing or heating curing, and a firm hull structure is formed. According to the method, the lightweight, corrosion resistance, transparency and impact resistance of the ship can be effectively improved, and the problem that the thermosetting resin glass fiber reinforced plastic ship cannot be recycled is solved. The whole ship is completely prepared from acrylic resin, complete separation of PMMA and fibers can be achieved by adopting a recovery method with MMA as a solvent, no solid waste exists in the whole process, closed-loop recovery of resources is achieved, and the method has great significance in energy conservation and environmental protection.

The invention discloses a polyurea composite coating based on MXene at carbon dots. The composite coating is prepared by heating and curing a polyurea composite elastomer based on MXene at carbon dots and an organic solvent, the polyurea composite elastomer based on the MXene (at) carbon dots is prepared by mixing a polyurea elastomer and MXene (at) carbon dot powder; the polyurea elastomer is prepared from the following raw materials: isophorone diisocyanate, poly (propylene glycol) bis (2-aminopropyl ether), isophthaloyl hydrazine and 4, 4 '-diaminodiphenyl disulfide through a two-step condensation polymerization reaction. Based on the synergistic effect of dynamic hydrogen bonds and flexible disulfide bonds of a self-repairing polyurea elastomer structure in the composite coating, the self-repairing characteristic of the composite coating is remarkably enhanced, meanwhile, a brick mud structure is formed through uniform embedding of MXene at carbon dots, and the mechanical strength, corrosion resistance, heat stability and rapid self-repairing capacity of the composite coating are greatly improved.

The invention relates to the technical field of concrete curing, in particular to a concrete heating curing device which comprises a curing shed. A supporting shaft is fixedly arranged in the curing shed in the length direction of the curing shed, a support is hinged to the supporting shaft, the upper portion of the support is provided with a bearing end face for bearing the concrete prefabricated part, the bearing end face is located above the supporting shaft, and a balancing weight is fixedly arranged on the portion, below the supporting shaft, of the support. A push rod capable of pushing the support to swing is movably arranged on one side of the support in the width direction of the maintenance shed. The water accumulation condition of the upper end face of the concrete prefabricated part in the steam curing process is avoided, the strength of the concrete prefabricated part after curing is guaranteed, the support does not need to be pushed through a pushing rod all the time, and energy consumption is reduced.

The invention discloses an aviation composite material paddle and a preparation method thereof, and the preparation method comprises the following steps: curing a carbon fiber prepreg by using a mold pressing process to prepare a carbon beam as a main bearing structure; a carbon beam and a light core material are used as internal supports through a three-dimensional weaving technology, a skin is formed through wrapping and weaving, and an integrated fiber prefabricated body is obtained; preparing a toughened resin system for RTM (resin transfer molding), wherein the toughened resin system comprises liquid resin capable of being thermally cured, a curing agent and a carbon nanotube subjected to surface chemical modification; and placing the fiber preform in a mold, closing the mold, injecting the toughened resin system into a mold cavity, curing, and demolding to obtain the aviation composite material paddle. According to the invention, the preparation of the composite material paddle with high surface precision, light overall weight and excellent impact toughness is realized, and the preparation method is good in process repeatability and suitable for batch production.

The invention discloses a full-tailing filling body enhanced carbon sequestration method based on bubble regulation and control, and belongs to the technical field of mine filling materials, and the method comprises the following steps: uniformly stirring raw materials; then carrying out ultrasonic treatment in cooperation with double-frequency ultrasonic waves to obtain full-tailing mixed slurry; and the full-tailing mixed slurry is subjected to pouring, damp-heat curing and carbon dioxide atmosphere curing, and the full-tailing filling body is obtained. Wherein except water, the raw materials comprise the following components in percentage by mass: 80% of tailings, 12% of cement, 2%-5% of nano SiO2, 1%-3% of nano ZrO2, 0.05%-1% of hydroxypropyl methyl cellulose, 0.1%-0.5% of an air entraining agent and 0.5%-1.5% of nano MgO; the air entraining agent is obtained by compounding an anionic surfactant and a protein natural foaming agent. According to the method, stable bubbles are formed through the synergistic effect of the air entraining agent / foam stabilizer, the nano ZrO2 is combined to enhance the interface and the nano SiO2 is combined to optimize the pore connectivity, and the nano MgO active component is supplemented, so that the synergistic improvement of high strength, high air permeability and efficient carbon sequestration of the filling material is realized.

The invention relates to the technical field of water treatment, in particular to a green preparation process of a composite membrane. The preparation process comprises the following steps: completing an interfacial polymerization reaction of a water-phase solution of a polyamine monomer and an oil-phase solution of a polyacyl chloride monomer on a porous supporting layer to prepare a membrane material of which the surface is coated with a primary polyamide layer; and treating the membrane material by using a carbonate buffer solution with the pH value of 9-10, and then drying without water washing or after water washing to obtain the finished product composite membrane. The molecular weight and the crosslinking degree of polyamide are further improved in the post-treatment stage of the interfacial polymerization reaction, the technical effect similar to'curing crosslinking and membrane strength enhancement 'of'heat treatment' of the post-treatment process of the traditional interfacial polymerization reaction is obtained, and meanwhile, the post-treatment process of heating curing in the traditional preparation process of the composite membrane is abandoned, so that the preparation process is simple, and the cost is low. A series of problems caused by thermocuring are avoided, including safety of VOC pollution, flammability of volatile organic compounds at high temperature and the like, low water flux caused by local excessive crosslinking due to high temperature and the like. The method is suitable for preparing nanofiltration membranes or reverse osmosis membranes.

A heat-curable adhesive composition containing: a photocleavable compound that generates an amine compound through cleavage induced by irradiation; and a heat-curable resin that cures upon heating in a presence of the amine compound. A layered film including: a substrate film; and an adhesive layer provided on a surface of the substrate film; wherein the adhesive layer is composed of the heat-curable adhesive composition.

The invention provides a mining polyurethane material for blocking spraying air leakage and a preparation method thereof, and belongs to the technical field of polyurethane. The preparation method comprises the following steps: carrying out surface treatment on a multi-walled carbon nanotube, mixing with porphyrin-Zn-MOF and polydopamine for modification to prepare a porphyrin-Zn-MOF polydopamine modified carbon nanotube, mixing with m-2DOPO-2NH2, reacting with KH560 modified nano silicon dioxide to prepare a modifier, mixing with polyether polyol and a catalyst, adding into water, adding a foaming agent and silicone oil, heating, stirring and mixing, transferring into a mold, carrying out heat preservation, and carrying out vacuum drying, so as to obtain a finished product. Adding diisocyanate, after foaming is completed and the temperature of the material is reduced to the room temperature, drying, heating and curing to prepare the mining polyurethane material for blocking spraying air leakage, adding the modifier into a polyurethane foaming system, so that the mechanical property and flame retardant property of the system are obviously improved, the antistatic property and the thermal stability are improved, the modifier can be uniformly dispersed in the system, and the flame retardant property and the antistatic property of the system are improved. And repeated spraying is avoided, the constructability is good, and wide application prospects are achieved.

The invention relates to the technical field of shield muck treatment, in particular to a preparation method of a high-carbon-sequestration shield muck baking-free brick, which comprises the following steps: mixing quick lime and steel slag micropowder in proportion, adding water, controlling the temperature, and standing to form an alkaline activated material; uniformly spreading the calcium-aluminum-iron-loaded red mud-based hydrotalcite on the surface of the alkaline activated material, and spraying slurry of carbide slag and water to form a hierarchical carbon sequestration precursor; after standing, adding water into the modified charcoal loaded with calcium magnesium phosphate and a water reducing agent, pre-stirring to form slurry, and adding the slurry into a hierarchical carbon sequestration precursor at a constant speed; adding the premixed original-state shield muck and a curing agent into the hierarchical carbon sequestration precursor, then adding high-calcium cement and fly ash, and stirring; after compression molding, curing and post-curing through a damp-heat curing and gradient pressurizing carbonization process to obtain the baking-free brick. A hierarchical precursor is constructed by quick lime, steel slag, red mud-based hydrotalcite and the like, and modified charcoal is combined, so that active ions are promoted to be dissolved out and uniformly distributed, the CO2 reaction efficiency is enhanced, and the carbon sequestration effect is improved.

The invention relates to a bi-component epoxy coating, a wire winding, a preparation method of the wire winding and an electric reactor. The bi-component epoxy coating comprises an epoxy prepolymer, an epoxy curing agent and a self-repairing microcapsule, wherein the self-repairing microcapsule contains an epoxy microcapsule and an amine microcapsule; wherein the amine microcapsule and the capsule wall of the epoxy microcapsule comprise polyurea, so that core liquid of the epoxy microcapsule and the amine microcapsule can be effectively preserved during primary thermocuring, and is not easy to flow out in advance. When the coating has cracks, bisphenol F diglycidyl ether in the amine microcapsules and aliphatic polyamine in the epoxy microcapsules can flow out and are gradually mixed, due to the high reaction activity of the aliphatic polyamine, secondary curing can be achieved without high temperature, microcracks can be repaired, further spreading of defects is prevented, and the service life of the coating is prolonged. And the long-term service capability of the self-repairing resin layer is effectively improved.

The invention relates to a high-temperature-resistant PMR type polyimide composite material and a preparation method thereof.The preparation method comprises the steps that firstly, prepreg serves as a surface layer laying layer, dry fibers serve as a core layer laying layer to prepare a prefabricated body, then molten thermosetting polyimide resin is injected, and preliminary curing is conducted; and then carrying out thermocuring treatment to enable the porosity to be less than or equal to 1.45%, so as to obtain the high-temperature-resistant PMR type polyimide composite material, namely the high-temperature-resistant PMR type polyimide composite material. Wherein the prepreg is prepared from a monomer mixture solution of fiber impregnated PMR type polyimide resin. Compared with the prior art, the forming manufacturability of the composite material is effectively improved, the blank of the high-temperature-resistant PMR type polyimide resin in the fields of complex components and large-thickness components is filled up, and the internal porosity of the composite material is effectively reduced, so that the overall performance of the composite material is improved, and the application scene of the composite material in the aerospace field is enriched.