663 results about "Resin-Based Composite" patented technology

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

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

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

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

The invention relates to the technical field of photovoltaic glass coatings, and discloses an anti-reflection liquid with a self-repairing function, a preparation method of the anti-reflection liquid and an organic-inorganic hybrid coating prepared from the anti-reflection liquid. The polyurethane-silicon dioxide composite resin with a disulfide bond structure is introduced, so that an automatic repairing function of the coating when the coating is damaged by slight scratches or cracks and the like is realized; by adopting an in-situ hybridization strategy, SiO2 particles are uniformly generated and stably dispersed in a polyurethane matrix to form a compact and synergistically enhanced composite network structure, so that excellent optical performance is maintained while functionality is achieved, and the power generation efficiency of a photovoltaic module is favorably improved; by adjusting the hydrophobicity of the surface of the coating, the super-hydrophobic effect is achieved; the preparation method is mild in process conditions.

The invention discloses a PEM proton exchange membrane for water electrolysis and a preparation method thereof, and relates to the technical field of water electrolysis. The proton exchange membrane is composed of five layers of structures including a modified sulfonated composite resin layer, an enhancement layer, a water retention layer, a catalyst layer and an anti-permeation layer, the preparation method comprises the following steps: the modified sulfonated composite resin layer is prepared by dispersing perfluorinated sulfonic acid resin and sulfonated lignin in a solvent, coating and drying; the reinforcing layer is prepared by blending a PTFE (Polytetrafluoroethylene) emulsion, a carbon nanotube and a tetrafluoroethylene-hexafluoropropylene copolymer, and then carrying out casting sintering, plasma treatment and hot press molding; the water retention layer is prepared by adopting an electrostatic spinning technology; the catalyst layer is formed by spraying a precursor solution step by step and drying; the anti-permeation layer is prepared through photoetching-etching array construction, resin coating and fluorosilane modification. The prepared proton exchange membrane has excellent mechanical strength, proton conductivity and stability, and is suitable for the field of PEM water electrolysis.

The present invention relates to a preparation method for a silicon-carbon composite negative electrode material, comprising the following steps: (P1) co-polymerization: co-dissolving an unsaturated organic acid, an acrylate monomer and an acrylamide monomer in water at a specific ratio, and co-polymerizing same under the action of a sacrificial agent of a saturated organic acid and an initiator to obtain a suspension containing an acrylic copolymer; (P2) alkali treatment: performing an alkali treatment and filtration on the suspension to obtain copolymer particles; (P3) in-situ polymerization: performing in-situ polymerization of phenolic aldehyde on the surfaces of the copolymer particles to obtain a composite resin of a phenolic aldehyde-coated acrylic copolymer; (P4) heat treatment: performing a heat treatment on the composite resin in an oxidizing gas atmosphere to obtain porous carbon; and (P5) performing silicon deposition and carbon coating on the porous carbon to obtain the silicon-carbon composite negative electrode material. When the silicon-carbon composite negative electrode material prepared in the present invention is used in a lithium battery, the volume expansion of silicon can be effectively relieved, and the cycling performance and charge-discharge capacity of a lithium-ion battery are improved.

The invention discloses a low-temperature curable bismaleimide resin-based composite material surface film and a preparation method thereof, relates to the field of bismaleimide resin composite material surface films, and aims at solving the problem that the curing temperature of an existing bismaleimide resin composite material surface film is too high. The surface film is composed of bismaleimide resin, an allyl compound, thermoplastic resin, a catalyst and a fluidity control agent. The preparation method comprises the following steps: adding the allyl compound into a reaction kettle, heating and stirring, adding the thermoplastic resin, cooling, adding the bismaleimide resin, continuously heating and stirring, and carrying out double-roller hot rolling film forming on the bismaleimide resin and a carrier for manufacturing an adhesive film through an adhesive film machine to prepare the low-temperature curable bismaleimide resin surface film.

The invention relates to a composite resin material for 3D printing and a preparation method thereof. The material is prepared from the following raw materials in parts by weight: 60-90 parts of polylactic acid, 5-15 parts of a toughening agent, 5-15 parts of a flame retardant, 5-10 parts of modified carbon nanotubes, 0.3-1 part of an anti-hydrolysis agent and 0.3-0.5 part of a lubricant. The flame retardant is added, a phosphate structure, a benzene ring and a hindered phenol structure are introduced into 5, 5 '-dibromo-[2, 2'-bipyridyl]-3, 3 '-diamine, and efficient flame retardance is achieved and the anti-aging performance of the composite resin material is enhanced through multiple synergistic effects of hindered phenol-phosphorus heterocycle-bipyridyl. The modified carbon nanotube is added as a reinforcing agent, so that the mechanical property of the composite resin material is remarkably improved, and the composite resin material is endowed with antibacterial property.

The invention discloses an environment-friendly odorless sealing strip adhesive as well as preparation and application thereof, and the environment-friendly odorless sealing strip adhesive is prepared from the following components in parts by mass: 15 to 20 parts of polyacrylate resin, 10 to 15 parts of dammar resin, 5 to 10 parts of fir resin, 3 to 5 parts of hydrogenated terpene resin, 2 to 5 parts of tributyl citrate and 45 to 65 parts of n-decane. The preparation method comprises the following steps: uniformly mixing natural resin (dammar resin, fir resin and hydrogenated terpene resin), polymeric monomers (n-octyl acrylate, methyl methacrylate and hydroxyethyl acrylate) and an environment-friendly solvent (n-decane), and then polymerizing to obtain the environment-friendly adhesive. The synthetic resin (polyacrylate resin) and the natural resin are sufficiently and mutually dissolved in n-decane to form stable and uniform composite resin glue, so that the problems of health risk and environmental pollution caused by harmful solvents such as xylene in the traditional sealing glue are effectively avoided, and the characteristics of no toxicity, no odor and environmental protection of the product are realized; meanwhile, the stability and the bonding performance of the section sealing glue are improved, the matching performance of the optical transmittance and the refractive index of the section sealing glue is enhanced, and the section sealing glue has quick-drying performance and is suitable for medical pathological sections.

The invention provides an ethylene maleic anhydride copolymer and a preparation and application method thereof, and the preparation method comprises the following steps: dissolving a maleic anhydride monomer in an organic solvent to form a uniformly dispersed solution system, and transferring the solution system into a high-pressure reactor; ethylene gas in a supercritical state is introduced into the solution system of the high-pressure reactor to form a uniform ethylene-maleic anhydride solution system, wherein the pressure of the ethylene gas in the supercritical state is 5-30 Mpa; adding a free radical initiator into the ethylene-maleic anhydride solution system, raising the reaction temperature, and carrying out solution polymerization reaction to obtain a reaction system; a precipitant is added into a reaction system to separate out the ethylene-maleic anhydride copolymer, ethylene and maleic anhydride in the ethylene-maleic anhydride copolymer alternately exist in the form that the molar ratio of ethylene to maleic anhydride is 1: 1, high-performance bonding composite resin can also be formed by blending the ethylene-maleic anhydride copolymer and polyethylene, and the high-performance bonding composite resin is suitable for the fields of adhesives, coatings, composite materials and the like.

The invention discloses a utilization method of a waste carbon fiber reinforced resin-based composite material and a belt mortar type rubbing and grinding activation machine, and belongs to the field of waste recycling. Carrying out rubbing friction catalysis and ultrasonic piezoelectric catalytic activation on the waste carbon fiber reinforced resin-based composite material and the barium titanate turbid liquid by adopting a rubbing and grinding activation machine with a mortar, then spraying an activating agent solution, and continuously soaking, rubbing and activating to obtain the modified waste carbon fiber reinforced resin-based composite material. And carrying out variable-pressure gradient heating carbonization activation to prepare the activated carbon barium titanate composite adsorption catalyst. According to the method, barium titanate piezoelectricity and friction catalysis coupled mechanical rubbing are adopted to activate a carbon fiber reinforced resin-based composite material, the stability of the carbon fiber reinforced resin-based composite material is reduced, the difference between carbonization activation conditions and performance of resin and carbon fibers is reduced, carbonization is controlled by adopting pressure transformation and temperature combination, and the activated carbon barium titanate composite adsorption catalyst is obtained. The method can be used for treating heavy metal-containing organic wastewater, new pollutant wastewater and waste gas.

The invention provides a low-dielectric high-toughness alkali-free spherical glass powder modified copper-clad plate. The low-dielectric high-toughness alkali-free spherical glass powder modified copper-clad plate consists of a composite resin matrix, modified alkali-free spherical glass powder, a synergistic functional filler, an auxiliary agent, a reinforced base material and a conductive layer, the modified alkali-free spherical glass powder is subjected to gradient treatment of plasma activation, silane grafting and organic silicon coating, the particle size of the modified alkali-free spherical glass powder is 0.5-2 microns, the modified alkali-free spherical glass powder accounts for 10-20 parts by weight in the raw materials, and the content of organic functional groups on the surface of the modified alkali-free spherical glass powder is larger than or equal to 1.6 mmol / g.The invention further provides a preparation method of the low-dielectric high-toughness alkali-free spherical glass powder modified copper-clad plate. Compared with the prior art, the preparation method has the following beneficial effects that a double-resin blending and elastomer toughening system is constructed through a modification process of filler activation, silane grafting and organic silicon coating, and the technical bottleneck is solved in combination with an interface compatibility technology.

The invention relates to the technical field of flame-retardant materials, in particular to a ceramic fiber composite resin fireproof flame-retardant material and a preparation method and application thereof. The ceramic fiber composite resin fireproof flame-retardant material comprises a ceramic fiber fireproof layer and a continuous glass fiber RTM (Resin Transfer Molding) layer, the ceramic fiber fireproof layer comprises fireproof ceramic fibers and nano oxide / modified nano oxide, and the surface of the ceramic fiber fireproof layer is subjected to plasma activation operation and silane coupling agent treatment. The ceramic fiber composite resin fireproof flame-retardant material has an excellent thermal runaway protection effect, and the bonding effect between the ceramic fiber fireproof layer and the continuous glass fiber RTM layer is excellent.

The invention discloses a field plowing rotary cultivator, which relates to the technical field of agricultural machinery and comprises a machine body frame, a gearbox is fixedly connected to the interior of the machine body frame, and two connecting seats are fixedly connected to the surface of one side of the machine body frame. In the embodiment, the machine body frame is in three-point suspension connection with the tail of a tractor through the connecting seat, the input end of the gearbox is connected with the output end of the tractor, the transmission shaft drives the rotary blade to turn soil, the bearing seat supports the transmission shaft to avoid vibration, the baffle prevents soil from splashing, and the rotary blade is made of silicon nitride ceramic matrix composite materials and is reinforced by adding carbon fibers. The machine body frame is made of a high-performance resin-based composite material and a mixed reinforced material of modified epoxy resin, modified glass fibers and modified aramid fibers, and compared with a traditional metal frame, the machine body frame has the advantages that the weight is reduced, excellent corrosion resistance is achieved, rust-proof treatment is not needed, and the service life is prolonged. The device can be used for a long time in a humid and muddy field environment without being damaged.

The invention is applied to the technical field of oral implant bridges, and particularly discloses a bionic oral implant bridge which comprises a lower abutment, the lower abutment is of an arc-shaped structure and is supported by a carbon fiber reinforced resin matrix composite, an upper abutment is fixedly embedded in the upper surface of the lower abutment, and a lower abutment is fixedly embedded in the lower surface of the upper abutment. The upper abutment is of a blocky structure made of a carbon fiber reinforced resin-based composite material. According to the bionic oral implant bridge, a multi-layer bionic structure composed of the inner supporting layer, the middle filling layer and the outer functional layer is arranged in the outer connecting part connected with the dental crown, the inner supporting layer is composed of the inner supporting part made of metal titanium and the arc-shaped protruding blocks, and the structural strength of the outer connecting part is improved through the inner supporting part; local stress during chewing can be dispersed through the annular distribution design of the protruding blocks made of the titanium material, single-point stress overload of the inner supporting part is avoided, the middle filling layer is made of polymethyl methacrylate, meshing impact force is buffered, and damage to the structure caused by direct transmission of hard force is reduced.

The invention discloses a high-temperature-resistant epoxy resin-based mold prepreg as well as a preparation method and application thereof, and belongs to the technical field of resin-based composite materials. The preparation method comprises the following steps: mixing and stirring the epoxy resin A and the heat-conducting filler, and grinding to obtain a premix I; mixing and stirring a curing agent and epoxy resin B to obtain a premix II; mixing and stirring the premix I and the premix II to obtain a mixture; and coating release paper with the mixture, covering the release paper with fiber cloth, and carrying out hot-pressing impregnation to obtain the high-temperature-resistant epoxy resin-based mold prepreg. The invention also discloses the high-temperature-resistant epoxy resin-based mold prepreg prepared by the method and application of the high-temperature-resistant epoxy resin-based mold prepreg in preparation of a composite material mold. The prepreg prepared by the method has excellent high temperature resistance, low thermal expansion coefficient and high heat conductivity coefficient, and the service life of a composite material mold can be greatly prolonged.

The invention relates to the technical field of composite resin coatings, in particular to a water-based composite resin coating and a preparation method thereof. According to the technical scheme, the waterborne polyurethane adhesive comprises the following components in parts by weight: 25-40 parts of waterborne polyurethane dispersion, wherein the waterborne polyurethane dispersion is prepared by reacting isophorone diisocyanate, poly (butylene adipate) glycol, dimethylolpropionic acid, ethylenediamine, polyethylene glycol monomethyl ether, triethylamine and nano cellulose. Through the triple synergistic effect of the nano-cellulose reinforced polyurethane phase, the montmorillonite crosslinked acrylic acid phase, the titanium dioxide and the graphene composite material, the balance of high hardness and high flexibility of the water-based paint is realized, the self-cleaning, antibacterial and corrosion-resistant functions are synchronously achieved, the water-based paint is long-acting and stable, the weather resistance is also remarkably improved to prolong the life cycle of the coating, and the water-based paint has a good application prospect. Excellent performance and environment-friendly value are realized.

The invention provides a high-corrosion-resistance environment-friendly coating material for an offshore wind power neodymium-iron-boron magnet and a preparation process of the high-corrosion-resistance environment-friendly coating material. The coating material comprises 35-45 parts of composite resin, 40-45 parts of a gradient filler system, 25-30 parts of an environment-friendly solvent and 1.0-1.5 parts of auxiliaries. A compact shielding layer is formed through a Si-O-Ti / Zr / Al inorganic framework interpenetrating network and a hydrophobic nanoparticle-high radius-thickness ratio micron lamellar labyrinth structure, the salt mist service life is larger than or equal to 1500 h, the adhesive force is larger than or equal to 15 MPa, the hardness is larger than or equal to 4 H, and VOC is smaller than 50 mg / m < 3 >; the coating is applied to an offshore wind power neodymium-iron-boron magnet coating process, the problems that a traditional coating is insufficient in corrosion resistance, weak in edge protection and high in pollution are solved, and the long-acting, stable and maintenance-free requirements of C5-M offshore wind power are met. The preparation process of the coating material comprises the following steps: preparing composite resin, treating gradient filler, compounding the coating material, performing one-step modification on epoxy / phenolic resin and metal alkoxide under the protection of inert gas, performing high-speed shearing on modified nano filler, performing gradient dispersion on the modified nano filler and flaky micron filler, performing three-roller grinding to be less than or equal to 15 microns, and performing vacuum defoaming to obtain a finished product of the coating material.

A method for manufacturing a resin matrix composite part by near-net-shape molding of a short-cut fiber prepreg is provided. A part simulation model is established. A cavity-core mold is fabricated according to the resin matrix composite part. A preset amount of the short-cut fiber prepreg is determined according to a dimension of the resin matrix composite part. The short-cut fiber prepreg with the preset amount is cut into a plurality of prepreg sections according to a cavity size of the cavity-core mold. The prepreg sections are laid in a stepped manner. The cavity-core mold is heated and subject to a mold closing pressure. The near-net-shape molding is performed for a preset time, and then demolding and post-processing are performed to obtain the resin matrix composite part with a required accuracy.

The invention relates to a manufacturing method of a high-heat-insulation and sound-insulation type PVB (Polyvinyl Butyral) intermediate film for an automobile large skylight, and belongs to the technical field of laminated glass material preparation. A common PVB resin layer A, a high-damping-coefficient sound-insulation resin layer B, a heat-insulation composite resin layer C, a high-damping-coefficient sound-insulation resin layer B and a common PVB resin layer A are prepared into the high-heat-insulation sound-insulation type PVB intermediate film in sequence by adopting a five-layer composite co-extrusion process, a multi-layer structure is adopted, and particularly, the high-damping-coefficient sound-insulation resin layer B is used, so that the propagation of sound waves can be effectively reduced, and the sound-insulation performance of the PVB intermediate film is improved. The large skylight of the automobile can effectively isolate external noise and improve the riding comfort in the automobile during high-speed driving or urban traffic, vanadium dioxide and graphene are compounded through the C-layer heat insulation composite resin, graphene has a large specific surface area, the dispersity of vanadium dioxide can be improved, and the heat insulation performance of the automobile is improved. Vanadium dioxide can improve the reflectivity of near-infrared light when the environment temperature rises.

The invention discloses a composite fiberboard and a preparation method thereof, and belongs to the technical field of artificial boards. Comprising the following raw materials in parts by weight: 34-45 parts of wood fiber, 17-26 parts of composite resin, 7-13 parts of hydroxymethyl cellulose, 5-9 parts of aluminate cement, 4-8 parts of talcum powder, 11-16 parts of polyvinyl alcohol, 9-14 parts of polyvinyl acetate emulsion, 7-11 parts of urea-formaldehyde resin adhesive, 5-9 parts of polyacrylate and 1.2-2.5 parts of a composite coupling agent. According to the composite fiberboard, the water resistance of the composite fiberboard can be improved, and the problem that harmful substances containing formaldehyde and the like are released is solved.

The invention belongs to the technical field of structural energy storage, and provides an embedded structural energy storage integrated composite material and a preparation method and application thereof. The embedded structure energy storage integrated composite material comprises an upper fiber reinforced resin matrix composite material layer, a lower fiber reinforced resin matrix composite material layer and a porous ceramic reinforced layer, and the connecting mode of all the layers is limited. The embedded structure energy storage integrated composite material has a multi-layer and multifunctional integrated structure, has excellent mechanical properties, also has efficient and safe energy storage capability, and can meet the requirements of low-altitude aircrafts such as unmanned aerial vehicles, electric vertical take-off and landing aircrafts and the like on light weight, high integration level, safety and reliability.

The utility model provides an antibacterial dental repair composite resin material forming and demoulding device, which relates to the technical field of demoulding and comprises a vertical plate, two vertical grooves are arranged on the surface of the vertical plate, sliding plates are slidably connected into the two vertical grooves, and a U-shaped frame and a placing box are fixedly mounted at one ends, far away from the vertical grooves, of the two sliding plates respectively. Two first electric telescopic rods are fixedly installed on the surfaces of the inner walls of the two sides of the containing box, first clamping plates are fixedly installed at the output ends of the first electric telescopic rods, threaded rods are rotationally connected between the inner walls of the two ends of the U-shaped frame, rotating wheels are fixedly installed on the surfaces of the threaded rods, and two second clamping plates are in threaded connection with the surfaces of the threaded rods; according to the automatic demolding device, the auxiliary device is arranged, so that the upper part and the lower part of the mold can be separated, then demolding is completed, the demolding efficiency is improved, and the situation that a crowbar is used to damage a product is avoided.

The invention provides a quantitative method for representing dispersibility of CNTs in a resin-based composite material system, and relates to the technical field of image processing, the method comprises the following steps: obtaining a two-dimensional distribution image of CNTs in a resin-based composite material, applying gamma gray scale transformation to a gray scale image, and generating a gradient amplitude image; binarization is realized by using a function im2bw; identifying a target area formed by a pixel set which has the same pixel gray value and is communicated with each other; dividing the target area into rectangular image infinitesimal elements according to the common divisor of the transverse and longitudinal resolutions; calculating the area proportion of the CNTs in each image infinitesimal, flattening the area proportion matrix of all the infinitesimal into a vector Q, and calculating the variance and the standard deviation; according to the method, the problems that in the prior art, due to the fact that a unified, objective and quantitative evaluation means is lacked, the dispersity of the CNTs in the resin-based composite material is often analyzed depending on artificial experience or subjective judgment, the subjectivity of a characterization result is high, and the real distribution condition of the CNTs in a matrix is difficult to accurately reflect are solved.

The invention discloses a high-temperature-resistant water-based polyimide sizing agent for carbon fibers, modified carbon fibers, a resin-based composite material of the modified carbon fibers, a preparation method and application of the resin-based composite material, and belongs to the technical field of advanced composite materials. The sizing agent disclosed by the invention is prepared by carrying out condensation polymerization on aromatic dianhydride and monofunctional aromatic amine to generate polyamide acid and then carrying out an ionizing salt formation process. The sizing agent has excellent storage stability and thermal stability, can effectively improve the wettability of the carbon fiber surface, and significantly improves the interface bonding performance of the carbon fiber reinforced polyimide composite material. The sizing agent provided by the invention can remarkably improve the room-temperature and high-temperature interface bonding strength of the carbon fiber reinforced polyimide composite material, and is suitable for the fields of aerospace, high-end equipment manufacturing and the like.

The invention relates to a blue light excited quantum dot lens and a preparation method thereof, the blue light excited quantum dot lens comprises a lens body and a hydrophobic coating, the hydrophobic coating is formed by coating the surface of the lens body with a hydrophobic coating, and the hydrophobic coating comprises composite resin, a curing agent, fluorine-containing resin and modified silicon dioxide. The surface of the lens body is coated with the hydrophobic coating containing the composite resin, the curing agent, the fluorine-containing resin and the modified silicon dioxide, the hydrophobic coating is formed, the fluorine-containing resin increases the contact angle on the surface of the hydrophobic coating, the fluorine-containing resin and the modified silicon dioxide act synergistically, and the water resistance of the lens is improved.

The invention discloses an anti-scraping thin coating type powder coating plate and a preparation method thereof, and relates to the technical field of coating materials and metal surface treatment. According to the scheme, the method comprises the following steps: forming a film on the surface of a degreased, alkali-washed and passivated metal substrate by adopting an interface modification liquid containing a silane coupling agent KH-590; and performing melt extrusion on a powder coating prepared from a hydroxyl-terminated polyether-ether-ketone / bisphenol A type epoxy silane grafted composite resin matrix, a triglycidyl isocyanurate / caprolactam composite curing agent and a titanate modified nano composite filler, and then performing electrostatic spraying and curing to obtain a coated plate with a dry film thickness of 20-40 [mu] m, wherein the powder coating is prepared from the hydroxyl-terminated polyether-ether-ketone / bisphenol A type epoxy silane grafted composite resin matrix, the triglycidyl isocyanurate / caprolactam composite curing agent and the titanate modified nano composite filler. The invention has the following beneficial effects: the interface modification layer and the silicon-containing grafted resin cooperate to improve the interface bonding force, boiling resistance and salt spray resistance; the multi-scale hard filler constructs a reinforced skeleton in the film, so that the scratch resistance is improved while the mechanical property is maintained, and thin coating and powder saving are realized under the condition of ensuring the decoration and durability.

This invention discloses a heterojunction low-temperature curing silver paste suitable for space HJT battery applications, its preparation, and its application. The heterojunction low-temperature curing silver paste comprises the following components in parts by weight: 75-92 parts of a first conductive powder, 0.5-5 parts of a second conductive powder, 2.25-9.5 parts of a composite resin system, 0.5-4.8 parts of a blocked isocyanate curing agent, 0.05-0.5 parts of a latent accelerator, 0.2-1.8 parts of a coupling agent, 0.3-1.5 parts of a dispersant, and 1.5-6.4 parts of a solvent; the composite resin system comprises epoxy resin and cyanate ester resin, with a mass ratio of epoxy resin to cyanate ester resin of (2-8):1. The silver paste of this invention can form a dense cross-linked network after curing at 150-250℃, while meeting the low outgassing requirements of materials for spacecraft. It can withstand extreme temperature difference cycles from -196℃ to +150℃ and high-energy particle irradiation environments in space, and is suitable for the preparation of metallized electrodes for HJT solar cells in low Earth orbit and medium-high Earth orbit.