1041 results about "Methyl methacrylate" patented technology

The invention discloses a toughened epoxy resin and a curing method thereof, and relates to the technical field of epoxy resins, the toughened epoxy resin comprises the following components: 100 parts of an epoxy resin matrix, specifically a mixture of bisphenol A epoxy resin and alicyclic epoxy resin, 5-35 parts of a composite amine curing agent, and 5-20 parts of a nano toughening agent, in particular to core-shell rubber particles grafted with epoxy groups on the surfaces, the core layer of each core-shell rubber particle is cross-linked polybutadiene, the shell layer of each core-shell rubber particle is polymethyl methacrylate, 0.5-3 parts of an accelerant comprising a bi-component synergistic accelerant, 1-5 parts of an interface enhancer, and a mixture of gamma-glycidyl ether oxypropyl trimethoxy silane and a titanate coupling agent, a bisphenol A type epoxy resin and a specific proportion of alicyclic epoxy resin are combined to construct an epoxy resin matrix according to a mass ratio of 2: 1, the epoxy resin matrix is matched with a composite amine curing agent prepared by carrying out a special three-step reaction on long-chain polyether diamine, aromatic diamine and anhydride, and key parameters such as molecular weight, functionality and molar ratio of the components are accurately regulated and controlled.

The invention discloses a hydrophilic polyacrylate / epoxy silica sol composite coating and a preparation method thereof. The composite coating is prepared from a polyacrylate epoxy silica sol solution containing carboxyl and a polyethylene glycol side chain through blending, coating, drying and heating crosslinking. The polyacrylate is synthesized by taking methyl methacrylate, methacrylic acid, hydroxyethyl methylacrylate and allyl polyethylene glycol as comonomers through a solution free radical copolymerization method, and the epoxy silica sol solution is prepared by taking tetraethoxysilane and gamma-glycidoxypropyltrimethoxysilane as raw materials through a solution polymerization method. The composite material is prepared through a sol-gel and core-shell preparation process. The preparation method comprises the following steps: carrying out solution blending on polyacrylate and epoxy silica sol, and carrying out coating, drying and other processes to generate the cross-linked polyacrylate / epoxy silica sol composite coating through a cross-linking reaction between carboxyl and epoxy. The prepared composite coating has the characteristics of long durability, wear resistance, hydrophilicity, antifogging, protein adsorption resistance and the like.

The invention provides a SiO2 / TiO2 / PMMA radiation refrigeration film and a preparation method thereof, and relates to the technical field of passive daytime radiation refrigeration films. The radiation refrigeration film is prepared from the following raw materials: N, N-dimethylformamide, polymethyl methacrylate, silicon dioxide and titanium dioxide. The invention relates to a preparation method of a SiO2 / TiO2 / PMMA radiation refrigeration film. The preparation method comprises the steps of preparing silicon dioxide, preparing titanium dioxide, synthesizing composite sol and preparing the SiO2 / TiO2 / PMMA radiation refrigeration film. The SiO2 / TiO2 / PMMA radiation refrigeration film prepared by the invention has high reflectivity in the ultraviolet-visible-near infrared band and high emissivity in the infrared band, can realize 8.4 DEG C sub-environment refrigeration, and is low in cost and simple in process flow.

The invention discloses a wearable medical monitoring equipment electrode which is composed of a layered structure and comprises a transparent flexible substrate layer which is made of a biocompatible flexible polymer material and is used for providing flexible support and isolating a metal electrode from the skin; the metal grid copper transparent electrode layer is formed on the surface of the transparent flexible substrate layer through a yellow light etching micro-nano processing technology; the conductive gel layer uniformly covers the surface of the metal grid copper electrode layer; the encapsulation layer is formed by spin-coating a polymethyl methacrylate solution on the surface of the conductive gel layer and forming a transparent protection layer after curing; the gradient line width bionic honeycomb-shaped copper grid design is adopted, the light transmittance is kept, meanwhile, the collection efficiency of physiological electric signals is remarkably improved, signal transmission loss is reduced, through the polyacrylamide and nanocellulose composite gel formula and micro-channel dynamic humidity adjustment, signal stability under long-term wearing is ensured, and the application range is wide. The problem of signal distortion caused by dryness of traditional gel is solved.

The invention discloses a lithium ion battery anti-cracking agent and a preparation method and application thereof.The preparation method is carried out under nitrogen protection and comprises the steps that a first polymer, a second polymer and a modifier are dissolved in a first solvent, and under the action of a catalyst, a reaction is carried out for 4-48 h at the temperature of 60-100 DEG C; and after the reaction is finished, cooling to below 40 DEG C, adding an amine compound, and reacting for 0.5-8 hours to obtain the anti-cracking agent for the lithium ion battery. The first polymer is polyvinyl butyral, and the hydroxyl content of the polyvinyl butyral is 18-21%; the second polymer is a triblock polymer as shown in a structural formula I, and the content of methyl methacrylate in the second polymer is 8-65%; the modifier is maleic anhydride or a maleic anhydride derivative; the catalyst is one of p-toluenesulfonic acid, hydrochloric acid and sulfuric acid. According to the anti-cracking agent, the battery pole piece can be intact and does not crack at high surface density under the condition of relatively low addition amount.

The invention relates to a heat dissipation coating composition, a preparation method thereof and application of the heat dissipation coating composition in a battery protection plate, and belongs to the technical field of new energy heat dissipation coatings. According to the preparation method, methyl methacrylate, 2-vinylpyridine, methacrylamide, dipropylene glycol diacrylate, azodiisobutyronitrile and tetradecane are taken as raw materials, a coating dispersion liquid is prepared firstly, then hydroxylated graphene is subjected to polymerization coating by utilizing the coating dispersion liquid based on an in-situ polymerization method, a coating layer with amino and pyridine rings is constructed, and the coating layer with amino and pyridine rings is prepared. The preparation method comprises the following steps: coating a coating particle with amino boron nitride to obtain a coated particle, compounding the amino boron nitride onto the coated particle through addition of amino and epoxy groups by taking ethylene glycol diglycidyl ether containing double-terminal epoxy groups as a bridging agent to prepare a modified composite particle, and blending the modified composite particle with water-borne epoxy resin and other components to obtain the heat-dissipating coating composition. The coating has excellent heat dissipation performance, can still keep a good heat dissipation effect even after being heated and cooled for multiple times, and is suitable for being applied to the battery protection plate.

The invention relates to the technical field of coating liquid, and particularly discloses anti-reflection self-cleaning type coating liquid as well as a preparation method and application thereof. The invention provides anti-reflection self-cleaning type coating liquid. The anti-reflection self-cleaning type coating liquid is specifically prepared from, by weight, 12-18 parts of polymethyl methacrylate, 5-8 parts of composite sol, 3-6 parts of silane, 2-4 parts of inorganic materials, 1-3 parts of an anti-reflection agent and 30-40 parts of a solvent. The composite sol is obtained by carrying out water bath heat preservation reaction treatment on a natural polymer colloid and a styrene-acrylonitrile-glycidyl methacrylate copolymer through a dopamine hydrochloride aqueous solution; the inorganic material is formed by mixing silicon dioxide with the particle size of 10-30 nm and silicon dioxide with the particle size of 40-70 nm according to the weight ratio of (0.5-1.5): (5-8). The anti-reflection self-cleaning coating liquid prepared by the invention can obviously improve the light transmittance and self-cleaning property of photovoltaic glass; and the durability and the stability of the coating layer are excellent.

The invention relates to a polymethyl methacrylate composite material as well as a preparation method and application thereof, and belongs to the technical field of compositions of high-molecular compounds. The polymethyl methacrylate composite material comprises the following components in parts by weight: 70-95 parts of PMMA resin, 2-15 parts of a toughening agent, 3-10 parts of activated shell powder and 1.2-6 parts of a functional additive, the specific surface area of the activated shell powder is greater than or equal to 0.8 m < 2 > / g; the functional additive comprises at least one of an antibacterial agent, a lubricant, an antioxidant and a weather-resistant agent. The polymethyl methacrylate composite material has high wear resistance and high toughness, and the surface of the polymethyl methacrylate composite material is not easy to absorb moisture and become sticky.

The invention discloses a batch processing technology of micro-fluidic chips, and relates to the technical field of chip processing. The method comprises the following steps: firstly, providing at least two layers of polymer coiled materials, namely a first coiled material for forming a micro-channel structure and a second coiled material for closing a micro-channel, the coiled materials are continuous coiled materials selected from polyethylene glycol terephthalate (PET), cycloolefin polymer (COP), polycarbonate (PC) or polymethyl methacrylate (PMMA), and the coiled materials are continuous coiled materials selected from polyethylene glycol terephthalate (PET), cycloolefin polymer (COP), polycarbonate (PC) or polymethyl methacrylate (PMMA); the thickness of the coiled material is 50-500 microns; secondly, carrying out continuous compression molding processing on the surface of the first coiled material through a roll-to-roll processing platform; through a roll-to-roll continuous process, micro-channel mold pressing, functional deposition, precise alignment bonding and online cutting are integrated, high-efficiency, high-consistency and high-integration-level batch manufacturing of the micro-fluidic chip is realized, and manual intervention and production cost are remarkably reduced.

The invention discloses a rare earth metal polymer with multiple stimulation responsiveness and a preparation method thereof, two monomers SP and VTPY are mixed with methyl methacrylate (MMA) according to a certain proportion, a polymer skeleton Poly (VTPY-co-SP-co-MMA) is prepared through a free radical polymerization reaction, the polymer and Tb (Com) 3.2 H2O are further subjected to a coordination reaction according to a specific proportion, and the rare earth metal polymer with multiple stimulation responsiveness is obtained. The Poly-Tb (Coum) 3 with the stimuli-responsive discoloration characteristic is prepared by the aid of the method. The rare earth metal polymer with methyl methacrylate as a framework and rare earth terbium ions and spiropyran monomers as double emission centers is synthesized, has multiple stimulation response characteristics, provides a brand new strategy and possibility for development of rare earth-based multifunctional intelligent materials, and has wide application prospects. An innovative solution is provided for development of a thermal enhanced rare earth luminescent material, the thermosensitive fluorescence response performance of the material is greatly improved, and a new thought is provided for design of an intelligent temperature response type rare earth luminescent material.

The invention discloses an artificial SEI film coated graphite negative electrode material and a preparation method and application thereof, and belongs to the technical field of lithium ion battery negative electrode materials. The preparation method comprises the following steps: heating and oxidizing graphite in mixed gas of air and nitrogen, and cooling to obtain oxidized and etched graphite; then dispersing the oxidized and etched graphite in a solvent, adding methyl methacrylate and graphene, stirring and initiating an in-situ polymerization reaction, and forming a doped coating layer on the oxidized and etched graphite; and finally, carrying out vacuum drying on the coated oxidized and etched graphite, and cooling to obtain the artificial SEI film coated graphite negative electrode material. The specific surface area of graphite is increased through oxidation etching, the ion diffusivity is improved, the combination effect of the organic polymer is improved, the first efficiency of the negative electrode material is remarkably improved by combining the synergistic effect of the conductive polymerized organic matter and graphene, and the conductivity, the structural stability and the interface compatibility are enhanced.

The invention discloses ternary synergistic nano-enzyme hydrogel as well as a preparation method and application thereof, and relates to the technical field of biomedical materials. The preparation method comprises the following steps: dissolving zinc nitrate hexahydrate and ferric nitrate nonahydrate in methanol; dissolving 2-methylimidazole in methanol, adding into a metal salt solution, stirring, and sequentially centrifuging, washing and drying to obtain Fe / ZIF-8 nano-enzyme; the preparation method comprises the following steps: adding methacrylated gelatin and hyaluronic acid into deionized water, stirring, cooling to room temperature, and refrigerating to obtain a GelMA-HA precursor solution; and adding the Fe / ZIF-8 nano-enzyme into the GelMA-HA precursor solution, stirring, injecting into a mold, and carrying out ultraviolet light cross-linking curing to obtain the ternary synergistic nano-enzyme hydrogel. According to the hydrogel disclosed by the invention, active oxygen is efficiently removed and oxygen is produced through Fe / ZIF-8 nano-enzyme, and cartilage repair is promoted in combination with lubrication and slow release functions of gelatin hydrogel, so that a new strategy is provided for treatment of osteoarthritis.

The invention relates to the technical field of preparation of surface micro-nano structures, and discloses a method for generating a micro-bulge structure based on a controllable gas phase microreactor, which comprises the following steps: preparing an organic mixed solution, mixing a driving solution methyl methacrylate into an initiator di-tert-butyl peroxide solution, then adding a solvent dimethyl sulfoxide solution, and stirring to obtain a mixed solution; meanwhile, ultrasonic oscillation is carried out for 10 minutes; according to the method for generating the micro-bulge structure based on the controllable gas-phase microreactor, the preparation of the micro-bulge structure can be realized only by directly dropwise adding a precursor organic mixed solution of a polymer on the surface of a substrate with a photothermal effect and then controlling the irradiation position and energy of continuous wave laser; compared with a photoetching method, the method has the advantages that complicated equipment operation and tedious process steps are not needed, and compared with the photoetching method, expensive photoetching machines, masks, vacuum chambers and complicated chemical reagent treatment processes are not needed, so that the operation flow is simplified.

The invention discloses a preparation method and an application method of a catalyst for producing aromatic aldehyde by oxidizing agricultural waste lignin, and belongs to the field of lignin resource utilization. The preparation method of the catalyst for producing aromatic aldehyde through lignin oxidation comprises the following steps: mixing lanthanum salt, B-site metal salt and citric acid in a solvent to obtain a precursor solution; and soaking a polymethyl methacrylate template in the precursor solution, reacting, and calcining to obtain the catalyst for producing aromatic aldehyde by lignin oxidation. The catalyst for producing aromatic aldehyde through lignin oxidation, provided by the invention, has the advantages of low cost, adjustable electronic structure, high oxygen mobility, excellent oxidation-reduction performance and the like, has good catalytic performance, and is suitable for being used as a lignin alkali-free oxidation catalyst. The prepared porous catalytic material with micropores, mesopores and macropores is beneficial to mass transfer of lignin macromolecules and the catalyst, beta-O-4 bonds of lignin can be efficiently broken, and alkali-free oxidation production of value-added aromatic aldehyde chemicals is facilitated.

The invention relates to a binder, an electrode material and a battery. The binder comprises the following preparation raw materials: a temperature-sensitive polymer and a conductive agent, the temperature-sensitive polymer comprises at least one of polyalkyl pyrrole, polyalkyl thiophene, polymethyl methacrylate, ethylene-vinyl acetate copolymer, polypropylene or polyimide. The structure and properties of the temperature-sensitive polymer can be changed when the temperature rises, so that the conductivity, the adhesive property and the mechanical strength of the material are adjusted, the adhesive can automatically insulate reaction in a battery cell and prevent thermal runaway, and the adhesive is good in stability at high temperature, does not decompose or degrade to release toxic gas, and is safe and reliable. The safety performance of the product is greatly improved; by combining with the conductive agent, a network structure with strong adhesive force, good conductivity and high heat conduction efficiency can be formed, and the obtained adhesive has good adhesive force and conductivity at room temperature and excellent insulativity and safety performance at high temperature.

The application discloses a kind of cable filling rope with halogen-free flame-retardant composite material and preparation method thereof, belong to composite material technical field.The application is used to solve the technical problems of poor cell quality, poor mechanical properties and flame-retardant properties of filling rope material in the prior art.A kind of preparation method of cable filling rope with halogen-free flame-retardant composite material includes the following steps: low-density polyethylene, high-density polyethylene, hybrid flame-retardant resin and modified nucleating agent are uniformly mixed to obtain foaming filling rope material;Foaming filling rope material is melt extruded to obtain cable filling rope with halogen-free flame-retardant composite material.The hybrid flame-retardant resin is obtained by reaction of polycyclic epoxy group cyclotriphosphazene, vinyl chloride methyl methacrylate copolymer, mixed inorganic powder, etc.;The modified nucleating agent is obtained by intercalating talc powder with modified diamide nucleating agent.The foaming filling rope material prepared by the application has the characteristics of high cell quality, excellent mechanical properties and flame-retardant properties.

To provide a composition capable of controlling thermal decomposability of molded articles, and polymers, cured products, and molded articles obtained using this composition, and a method for producing polymethyl methacrylate.SOLUTION: Provided is a composition containing methyl methacrylate, methyl pivalate, and methyl isobutyrate, wherein the concentration of methyl pivalate is more than 0 mass ppm and 50000 mass ppm or less in the composition, and the concentration of methyl isobutyrate is more than 0 mass ppm and 2000 mass ppm or less in the composition. Provided are a polymer, a cured product, and a molded article obtained by employing the composition, and a method for producing polymethyl methacrylate by polymerizing methyl methacrylate in the composition.SELECTED DRAWING: None

The invention relates to the technical field of ceramic materials, in particular to a preparation method of a diatomite-based porous ceramic material and application of the diatomite-based porous ceramic material in wastewater pollutant treatment. The preparation method of the diatomite-based porous ceramic material comprises the following steps: mixing a basic raw material, a sintering aid, a pore forming agent and a binder, performing compression molding to obtain a green body, and sintering the green body, the basic raw materials comprise 80-85% of diatomite, 5-10% of kaolin, 0-5% of feldspar and 5-10% of sodium silicate; the mass of the sintering aid is 5% higher than that of the basic raw material; the mass of the pore-forming agent is 25-45% of that of the basic raw material, and the pore-forming agent is selected from one or more than two of crystalline flake graphite, polymethyl methacrylate and spherical graphite. By controlling the composition and dosage of the basic raw materials, the sintering aid and the pore-forming agent, a micro-nano hierarchical pore structure is formed, mechanical properties and permeability are improved at the same time, and good filtration and interception performance on pollutants in wastewater is achieved.

The invention provides a nano plugging agent for shale drilling and a preparation method and application thereof, the nano plugging agent for shale drilling comprises the following preparation raw materials: silane coupling agent modified nano silicon dioxide, a polymeric monomer, an emulsifier and an initiator; the polymeric monomer is one or a combination of at least two of styrene, sodium p-styrenesulfonate, acrylic acid, acrylonitrile or methyl methacrylate. The nano plugging agent for shale drilling can effectively improve the plugging rate, has the characteristics of good dispersity and stability, difficulty in breaking, strong adaptability to the sizes and shapes of pores and cracks and the like, meets the plugging requirements of shale nano-scale cracks, efficiently reduces pressure transmission and filtrate invasion, and prevents well wall instability.

The invention relates to a renewable industrial flue gas carbon dioxide adsorbent and a preparation method thereof. The method comprises the following steps: S1, mixing alkali metal, an aluminum oxide precursor, silicon oxide and a first solvent, or mixing an alkali metal solution, the aluminum oxide precursor, the silicon oxide and an optional second solvent, and then molding the mixed material to obtain microsphere particles; s2, mixing the microsphere particles and organic amine, and carrying out first loading treatment and drying treatment to obtain an organic amine loaded material; s3, roasting the organic amine-loaded material, mixing the obtained roasted material with a carrier material, and carrying out second loading treatment, so as to obtain the carbon dioxide adsorbent, the carrier material is selected from at least one of polystyrene-polyacrylic acid-polyethylene oxide, polymethyl methacrylate-b-polystyrene, zirconium oxide and a porous ceramic material. The carbon dioxide adsorbent is relatively high in adsorption capacity and relatively good in selectivity, reproducibility and stability; and large-scale industrial production and application are facilitated.

The application discloses a light anti-impact PC / ABS and application thereof in a robot shell and belongs to the technical field of plastic alloys. The light anti-impact PC / ABS provided by the application comprises the following components in parts by weight: polycarbonate 70-90 parts, ABS 10-30 parts, PMMA 10-20 parts, toughening and compatibilizing agent 8-10 parts, modified hollow glass microbead 8-10 parts, flame retardant 5-15 parts, lubricant 1-3 parts and antioxidant 0.1-2 parts. The toughening and compatibilizing agent is a copolymer of branched polysiloxane, methyl methacrylate, 3-methoxystyrene, glycidyl methacrylate and N-phenylmaleimide. The light anti-impact PC / ABS provided by the application reduces the density of PC / ABS and improves the anti-impact performance of PC / ABS by adding the modified hollow glass microbead and the toughening and compatibilizing agent, and is especially suitable for being used in a robot shell material.

The invention relates to a preparation method and application of a black high-transmittance resin composite board, and belongs to the technical field of advertising materials. The resin is formed by compounding a black light-transmitting layer, a light guide layer and a diffusion layer, wherein the high-transmittance layer is prepared by modifying a carboxylated carbon nanotube with a silane coupling agent, polymerizing with a methyl methacrylate monomer, and directionally arranging in a magnetic field, so that high light transmittance and pure black appearance are realized; the light guide layer takes polycarbonate as a matrix, SiO2 microspheres are added, and the light transverse propagation efficiency is improved through hot press molding; the diffusion layer takes polymethyl methacrylate as a matrix, ZnO nanoparticles are added, a periodic microprism structure is processed on the surface, and uniform diffusion of light is realized. When applied to a lamp box, the light source is turned off to present a pure black appearance, and when turned on, the light source has high light transmittance and no mixed color, and is suitable for high-end advertisement display screens, vehicle-mounted lamp boxes and other scenes.

The invention relates to the technical field of concrete, and discloses a concrete anti-cracking agent and a preparation method thereof.The preparation method comprises the steps that 10-15 parts by weight of zeolite powder, 12-16 parts by weight of anhydrite, 2-3 parts by weight of polymethyl methacrylate microspheres, 1-3 parts by weight of cellulose-based polyurethane and 0.4-0.7 part by weight of graphene oxide are added into a stirrer and stirred for 10-16 min, and a mixture is obtained; and finally, obtaining the concrete anti-cracking agent. The concrete anti-cracking agent disclosed by the invention has relatively good anti-cracking and compression-resistant effects.

The invention belongs to the technical field of hydrogel preparation, and discloses a biocompatible self-healing photocuring hydrogel and a preparation method and a use method thereof.The biocompatible self-healing photocuring hydrogel is prepared by adding an ultraviolet light initiator and sodium chloride into a polyvinyl alcohol aqueous solution, evenly mixing, then adding acryloyl glycinamide powder to enable the acryloyl glycinamide powder to be dissolved, then adding a crosslinking agent, and evenly mixing to obtain the biocompatible self-healing photocuring hydrogel. Adding water into the mixed solution, then removing bubbles, then adding methacrylated gelatin and dissolving, and then removing bubbles to obtain a biocompatible self-healing photocuring hydrogel mixed solution; adding a borax solution prepared from sodium tetraborate and deionized water into the obtained biocompatible self-healing light-cured hydrogel mixed solution, and after the biocompatible self-healing light-cured hydrogel mixed solution and the borax solution are subjected to cross-linking reaction, removing bubbles to obtain the biocompatible self-healing light-cured hydrogel. The biocompatible self-healing photocuring hydrogel has excellent mechanical properties and self-healing ability, and is suitable for application scenes such as biosensing, wound repair and tissue engineering.

The invention discloses a high-elastic material for an anti-slip sole and a preparation method of the high-elastic material in the field of high polymer materials. The high-elastic material is prepared from the following raw materials: modified polyurethane, modified silicone rubber, calcium carbonate, dicumyl peroxide, 2-mercaptobenzothiazole, N-isopropyl-N '-phenyl p-phenylenediamine and naphthenic oil. Wherein the modified polyurethane is prepared by the following steps: carrying out vacuum dehydration on polybutylene adipate, reacting with toluene diisocynate to prepare an isocyanate-terminated prepolymer, adding dimethylolpropionic acid, triethylamine and deionized water to obtain a water-based dispersion, and carrying out graft copolymerization on the water-based dispersion, methyl methacrylate and the like; the preparation method comprises the following steps: preheating modified polyurethane, mixing with modified silicone rubber at a high speed, adding calcium carbonate and naphthenic oil, carrying out double-roller open milling and thin-passing, adding a vulcanizing agent and the like, carrying out overturning milling, and carrying out flat plate vulcanization molding. The material is used for anti-skid soles, and has the advantages of high elasticity, lasting skid resistance and excellent weather resistance.

The invention relates to a light decorative acrylic plate and a preparation method thereof, and relates to the technical field of high polymer materials, the plate is prepared from a methyl methacrylate / polymethyl methacrylate prepolymer, a thermal initiator, a cross-linking agent, a low-boiling-point pore-foaming agent A and a high-boiling-point pore-foaming agent B, and the low-boiling-point pore-foaming agent A and the high-boiling-point pore-foaming agent B are immiscible with a polymerization system; and the phase selective coloring agent is only dissolved in the pore-foaming agent B. The preparation method comprises the following steps: mixing the components to form a multiphase dispersion system; pouring into a mold, then horizontally standing, and enabling the two pore-foaming agents to generate a concentration gradient by utilizing gravity; then programmed heating is carried out, the pore-foaming agent A is gasified to form micropores in the first low-temperature stage, the plate body is cured in the second medium-temperature stage, the pore-foaming agent B is gasified to form macro pores in the third high-temperature stage, and meanwhile the coloring agent is deposited on the inner walls of the macro pores in situ; and finally cooling, demolding and annealing. By means of the process, light weight, three-dimensional gradient texture construction and pore inner wall selective coloring of the board are achieved.

The invention provides a composite acrylic acid low-surface-energy antifouling coating, a preparation method and application, and belongs to the technical field of marine antifouling materials, the composite acrylic acid low-surface-energy antifouling coating comprises a three-layer composite structure, the three-layer composite structure comprises a bottom layer, a middle layer and a surface layer from bottom to top, the bottom layer is capsaicin-loaded polymethyl methacrylate, and the middle layer is a polymethyl methacrylate surface layer. The bottom layer is made of capsaicin, the middle layer is made of pressure-sensitive adhesive activated by oxygen plasma, the surface layer is made of dihydroxyl-terminated polydimethylsiloxane, the mass ratio of the bottom layer to the middle layer to the surface layer is (23-25): 1: (23-25), and the mass content of capsaicin in the bottom layer accounts for 5.82-5.75% of the total mass; based on the bonding strength change of the pressure-sensitive adhesive generated by oxygen plasma jet and the capsaicin for effectively inhibiting biological growth, polyacrylic acid is used as a self-polishing reservoir to continuously release an environment-friendly antifouling agent; the pressure-sensitive adhesive adheres to the polydimethylsiloxane layer through the adhesive force change generated by oxygen plasma to achieve the low-surface-energy antifouling effect, synergistic gain is achieved, the composite material intervenes into the biological fouling process from multiple aspects, and the composite material copes with the marine biological fouling process jointly.

The invention discloses a plant starch composite material for children's toys and a preparation method thereof, and belongs to the technical field of degradable materials.The preparation method comprises the steps that double-bond silicon dioxide microspheres are prepared through a sol-gel method and polymerized with methyl methacrylate, then a styrene-maleic anhydride copolymer is hydrolyzed under the acidic condition, and the plant starch composite material is obtained; the preparation method comprises the following steps: hydrolyzing a styrene-maleic anhydride copolymer to obtain a hydrolyzed copolymer containing a carboxyl group, carrying out esterification reaction on the hydrolyzed copolymer and starch, consuming a large amount of hydroxyl groups on the surface of the starch by the esterification reaction so as to increase the compatibility of the starch and PBAT, and forming a flexible coating layer on the surface of the starch by a long-chain structure of the hydrolyzed styrene-maleic anhydride copolymer so as to prevent agglomeration among starch particles; the coating layer has a relatively low friction coefficient, is easy to generate molecular chain slippage when being stressed, and endows the surface with self-lubricating property, so that the microspheres can disperse stress through sliding in the use or processing process, the coating layer forms a soft shell on the surfaces of the microspheres, and direct contact of the microspheres is prevented through steric hindrance, so that the microspheres are not easy to agglomerate.

The invention belongs to the field of luminescent materials, and relates to stimuli-responsive self-repairing fluorescent hydrogel. In particular to stimuli-responsive self-repairing fluorescent hydrogel as well as a preparation method and anti-counterfeiting application thereof. According to the method, firstly, hydrophobic anthryl fluorophore 9-anthracene methyl methacrylate is wrapped by an aggregate formed by a surfactant hexadecyl trimethyl ammonium chloride to form micelles, and then, a micelle solution and polymer monomers acrylic acid and zirconium chloride are subjected to free radical-initiated copolymerization to obtain the stimuli-responsive fluorescent hydrogel. The hydrogel has self-repairing capability and fluorescence stimulation response capability, and is expected to be applied to the fields of bionic intelligent materials and information.

The invention discloses a core-shell structure P (MMA-MBA) copolymer heat-storage phase-change microcapsule, the microstructure is of a spherical structure, the core-shell structure is adopted, the core structure is hexadecane, the shell structure is a methyl methacrylate (MMA) and N, N-methylene bisacrylamide (MBA) copolymer, the emulsifier is lauryl sodium sulfate (SDS), the initiator is potassium persulfate, and the pH value of the core-shell structure P (MMA-MBA) copolymer heat-storage phase-change microcapsule is 7-8. And the coating efficiency is 70-75%. The preparation method comprises the following steps: 1, preparing an oil phase and a water phase; and 2, polymerization reaction of the microcapsule. A phase change cement material based on a core-shell structure P (MMA-MBA) copolymer heat storage phase change microcapsule is prepared by compounding the P (MMA-MBA) copolymer heat storage phase change microcapsule and a cement matrix, and has hydrophobicity; obvious weightlessness exists in two times.