787 results about "Methyl methacrylate" patented technology

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 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 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 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 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 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 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 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.

The invention belongs to the technical field of preparation of thickening agents, and particularly relates to a preparation method of a polymer thickening agent for fracturing. The preparation method comprises the following steps: preparing a pretreated methacrylic acid (triethoxysilyl) methyl ester solution; preparing a pretreated 2-[[2-(methacryloyloxy) ethyl] dimethylammonium] acetate solution; preparing a water phase; and preparing the polymer thickening agent for fracturing. According to the preparation method of the polymer thickening agent for fracturing, acrylamide is used as a main monomer, maleic acid mono [2 (1-oxy-2-propenyl) oxyethyl] ester, methacrylic acid (triethoxysilyl) methyl ester and 2-[[2-(methacryloyloxy) ethyl] dimethylammonium] acetate are used as functional monomers, and the acrylamide, the maleic acid mono [2 (1-oxy-2-propenyl) oxyethyl] ester, the methacrylic acid (triethoxysilyl) methyl ester, the methacrylic acid (triethoxysilyl) methyl ester and the 2-[[2-(methacryloyloxy) ethyl] dimethylammonium] acetate are used as functional monomers. A redox initiator and an azo initiator are combined to serve as an initiator system, multi-monomer copolymerization is achieved through gradient temperature polymerization, and the temperature-resistant and salt-resistant polymer thickening agent for fracturing is prepared.

The invention relates to the technical field of ceramic antifouling agents, and mainly relates to a high-hardness wear-resistant matte ceramic antifouling agent and a preparation method thereof. The high-hardness wear-resistant matte ceramic antifouling agent is prepared from the following raw materials in parts by weight: 50 to 60 parts of waterborne acrylic resin, 3 to 5 parts of tetraethoxysilane, 0.5 to 1.5 parts of citric acid, 0.1 to 0.5 part of a catalyst, 0.5 to 3 parts of fluorine-containing acrylate, 1 to 10 parts of polymethyl methacrylate microspheres, 20 to 30 parts of water, 1 to 5 parts of titanium dioxide sol and 1 to 5 parts of organic silicon modified polyvinyl alcohol. The organic silicon modified polyvinyl alcohol is obtained by carrying out modification treatment on polyvinyl alcohol by using KH-570. The high-hardness wear-resistant matte ceramic antifouling agent provided by the invention can be used for carrying out good antifouling treatment on the ceramic surface and enhancing the wear resistance.

The invention discloses immunoregulation hydrogel based on ginsenoside Rd, a preparation method and application, and relates to the technical field of biomedical materials and hydrogels. The hydrogel is prepared by taking natural polysaccharides modified by phenylboronic acid groups, derivatives of the natural polysaccharides and methacrylic anhydride modified protein biopolymers as biological matrix materials; ginsenoside Rd is used as a bioactive functional component, and polyvinyl alcohol is used as a cross-linking agent; a first dynamic reversible cross-linked network is formed through chemical cross-linking, and is endowed with injectability, self-healing property and glucose responsiveness; ginsenoside Rd is taken as a main raw material and then subjected to addition polymerization reaction under the irradiation of a photoinitiator and light, a second static covalent cross-linked network is formed, mechanical strength and structural stability are given to the system, in addition, ginsenoside Rd is loaded in the system through boric acid ester bonds, and the slow-release effect is achieved. The problems of stability and bioavailability during local application of the Chinese herbal medicine extract are solved, and healing of chronic and serious wounds can be more effectively promoted.

The present invention belongs to the technical field of methyl methacrylate. Disclosed is a rectification device for recovering methyl methacrylate, comprising a rectification column body, wherein the rectification column body is internally provided with a heat protection part, and the heat protection part comprises a temperature sensor which is fixedly connected to the inner wall of the top end of the rectification column body and configured to monitor the temperature in the rectification column body in real time. An electric cylinder is started and retracts to drive a toothed plate to translate, and during translation, the toothed plate synchronously drives the extension of a corrugated pipe mounted thereto, such that some high-temperature hot gas at the top of the rectification column body is sucked in by means of one gas pipe, and is subsequently led out of the rectification column body via the other gas pipe, thereby preventing a sustained temperature rise. When the electric cylinder extends again, a piston plate rod can push and compress cooling gas that is drawn in advance, and the cooling gas can be ejected via L-shaped pipes to drive wind wheel shaft rods to rotate, increasing the air circulation inside the rectification column body, and avoiding the polymerization of methyl methacrylate and effects on the rectification quality.

The invention discloses high-wear-resistance HFBMA (hexafluorobutyl methacrylate) acrylic resin and a preparation method thereof. The high-wear-resistance HFBMA acrylic resin is prepared from the following components in percentage by mass: 30 to 40 percent of styrene, 8 to 15 percent of hydroxypropyl ester, 8 to 15 percent of propyl butyl ester, 0.3 to 1.5 percent of methacrylic acid, 0.5 to 2 percent of initiator, 3 to 10 percent of hexafluorobutyl methacrylate (HFBMA), 2 to 8 percent of organic silicon monomer or POSS (polyhedral oligomeric silsesquioxane) and 25 to 35 percent of xylene. According to the experiment, the optimal raw material composition and proportion are obtained through screening of a large number of experiments, the optimal synthesis process is obtained through optimization of a large number of experiments, and the conversion rate reaches 98.8% or above. The acrylic resin disclosed by the invention has excellent wear resistance, weather resistance, chemical resistance, high hardness, high adhesive force and excellent hydrophobicity and anti-fouling performance, and the comprehensive performance is remarkably and technically improved.

The invention discloses a high-strength polyethylene film and a preparation method thereof, and relates to the technical field of high polymer materials. The invention discloses a high-strength polyethylene film. The high-density polyethylene composite material comprises the following raw materials in parts by weight: 40-60 parts of high-density polyethylene, 13-25 parts of low-density polyethylene, 5-10 parts of an ethylene-vinyl alcohol copolymer, 10-15 parts of modified nano calcium carbonate, 3-5 parts of modified lignin fibers, 0.5-1 part of an antioxidant 1010, 0.3-0.7 part of a light stabilizer 770, 1-2 parts of zinc stearate and 2-3 parts of maleic anhydride grafted polyethylene. The coating comprises, by weight, 20-30 parts of polyethylene glycol terephthalate, 3-5 parts of poly (butylene adipate-co-butylene terephthalate), 2-4 parts of talcum powder, 1-3 parts of polymethyl methacrylate and 30-45 parts of deionized water. The high-strength polyethylene film is scientific in raw material ratio, and contains various modified components to enhance the performance; the modified nano calcium carbonate and lignin fiber technology is advanced, and compatibility and stability are improved; the preparation method is reasonable, and the film has the characteristics of high strength, good toughness, oxidation resistance, light resistance and the like and is wide in application through two-way stretching and other procedures.

The invention relates to an efficient cross color prevention composition and application thereof, and belongs to the technical field of cross color prevention of textiles. The invention provides a cross color prevention composition. The cross color prevention composition is prepared from the following components in parts by weight: 0.5-50 parts of methoxy polyethylene glycol-500-methacrylate; 5 to 60 parts of a vinyl imidazole / vinyl pyrrolidone copolymer; and 30 to 90 parts of propylene glycol. The fiber film-forming characteristic of the methoxy polyethylene glycol-500-methacrylate is cooperated with the adsorption capacity of the vinyl imidazole / vinyl pyrrolidone copolymer, so that the cross color prevention efficiency of the detergent is remarkably improved, and the pigment residue is reduced.

This invention discloses an ultrafine polyethylene / polyester composite fiber and its preparation method, belonging to the field of composite fiber technology. It solves the problems of poor compatibility between the core and sheath layers, excessive fineness of PE / PET fibers, and difficulties in achieving ultrafine fiber production in existing technologies. The method involves preparing ultrafine polyethylene / polyester composite fibers using a core-sheath composite spinning process. The single filament fineness of the ultrafine polyethylene / polyester composite fiber is 0.6~0.8 dtex. The ultrafine polyethylene / polyester composite fiber has a core-sheath structure, with the sheath material being polyethylene and the core material being a blend of modified polyester and a compatibilizer. The modified polyester molecular chain consists of terephthalic acid segments, ethylene glycol segments, and isophthalic acid segments. The compatibilizer is a graft copolymer of polyethylene and poly(ethylene-co-glycidyl methacrylate)-g-polymethyl methacrylate. The preparation method of this invention is simple and easy to implement, with excellent core-sheath compatibility, which is beneficial for achieving ultrafine fiber production. The composite fiber exhibits excellent performance and can meet the demands of the high-end market.

The invention discloses an anti-fouling easy-to-clean coating and a preparation method thereof, and relates to the technical field of coatings. The invention discloses an anti-fouling easy-to-clean coating. The coating comprises the following raw materials in parts by weight: 30-50 parts of polymethyl methacrylate, 10-15 parts of modified nano titanium dioxide, 20-30 parts of a fluorocarbon polymer, 3-8 parts of a silane coupling agent, 8-12 parts of nano zinc oxide, 5-10 parts of a plasticizer, 2-6 parts of a dispersant, 1-3 parts of a leveling agent, 4-8 parts of a cross-linking agent, 1-3 parts of an antioxidant, 3-7 parts of a modified cellulose derivative and 2-5 parts of an antibacterial agent. And 5-10 parts of a modified shape memory polymer microcapsule. The anti-fouling and easy-to-clean coating disclosed by the invention is high in anti-fouling property, and the fluorocarbon polymer and the modified nano titanium dioxide are cooperated, so that stains are difficult to attach and can be decomposed by photocatalysis; cleaning is easy, and stains can be easily removed due to the low surface; the water seepage resistance is good, and the special modified cellulose derivative effectively blocks moisture; the antibacterial effect is good, and various microorganisms can be inhibited; and the self-repairing capability is also achieved, recovery can be achieved after damage, the service life is greatly prolonged, and the material protection requirement is comprehensively met.

The invention discloses a self-expanding water shutoff material for tunnels and a preparation method of the self-expanding water shutoff material, and belongs to the field of polymer composite materials. Modified polyurethane in the self-expanding water shutoff material is prepared through vacuum dehydration of polyether glycol, chain extension of diisocyanate, reaction of a carboxyl-containing chain extender and acetone, dropwise addition and grafting of nano silicon dioxide dispersion liquid, neutralization of triethylamine and reduced pressure distillation. The modified epoxy acrylate is prepared by mixing epoxy resin and methyl methacrylate, stirring a silane coupling agent and an absolute ethyl alcohol solution, initiating polymerization by benzoyl peroxide, dropwise adding nano-montmorillonite dispersion liquid for reaction, stirring acrylic acid and a polymerization inhibitor hydroquinone, and performing reduced pressure treatment. The material formula comprises the two modified macromolecules, super absorbent resin, a filler, a plasticizer, an initiator, a cross-linking agent, a defoaming agent and deionized water. The prepared material has the advantages of high expansion rate, excellent water resistance, strong adhesive property and controllable curing time, and is suitable for the scenes of tunnel water inrush plugging, lining crack repairing, water-rich fault zone advanced grouting and the like.

The invention discloses a solid-state battery pole piece and a preparation method thereof, and belongs to the technical field of battery pole pieces, and the preparation method comprises the following steps: under a nitrogen protection condition, adding methacrylate and azodiisobutyronitrile into a solvent for prepolymerization to obtain a mixed solution; uniformly grinding a positive electrode material, a conductive agent and polyvinylidene fluoride, adding into a solvent, and stirring and mixing to obtain positive electrode slurry; mixing the mixed solution, the positive electrode slurry and the polyvinyl imidazole ionic liquid to obtain a mixed glue solution, coating the surface of a current collector with the mixed glue solution, and drying to obtain a solid-state battery pole piece; according to the preparation method, the uniformity of PVDF and PMMA is improved from the molecular size through solution blending, the crystallinity of a polymer in a system is destroyed, and ion transmission is promoted; an oxygen-containing group in the PMMA can be used as a hydrogen bond acceptor, when the PMMA is blended with an imidazole ring, a hydrogen bond donor and the acceptor can interact to form a hydrogen bond, and the PMMA, the PVDF and the polyvinyl imidazole ionic liquid synergistically improve the performance of the solid-state battery pole piece.

The invention relates to a modified cellulose additive for a coating and a preparation method thereof. The preparation method comprises the following steps: preparing titanium dioxide sol; reacting hydroxyethyl cellulose with anhydride to obtain a modified cellulose dispersion liquid; titanium dioxide sol and the modified cellulose dispersion liquid are mixed to obtain composite dispersion liquid, and fluorine-containing and silicon-containing reactive monomers and methyl methacrylate are used as monomer pre-emulsion to be polymerized in the composite dispersion liquid. The surface of cellulose is grafted with chlorinated betaine to provide antibacterial and anti-fouling properties, the prepared nano titanium dioxide sol improves the ultraviolet shielding property, and the chlorinated betaine and the nano titanium dioxide sol can realize uniform physical mixing and adsorption through intermolecular hydrogen bond acting force, hydrogen bond interaction and the like; a hydrophobic monomer prepolymer is polymerized on the surface of a compound to form a core-shell structure, so that the compactness of the composite material is further improved, a polymer chain on the surface contains rich siloxane and can be effectively compounded with resin in a coating after being added into the coating, and a water dispersion emulsion form can be compatible with various water-based resin systems and is not easy to agglomerate.

The invention discloses a non-woven fabric made of Juncao fibers, and belongs to the technical field of textiles. The non-woven fabric made of the Juncao fibers is obtained by opening and mixing modified Juncao regenerated cellulose fibers, carding to form a net and needling and reinforcing; the modified pennisetum sinese regenerated cellulose fiber is prepared by the following steps: dipping dried pennisetum sinese pulp, squeezing, carrying out graft copolymerization on the squeezed dried pennisetum sinese pulp, 2-acrylamide-2-methylpropanesulfonic acid and benzaldehyde PEG acrylamide under the catalysis of ceric ammonium nitrate, dissolving, then adding chamomile essential oil microcapsules, reacting, and spinning. The chamomile essential oil microcapsule is prepared by the following steps: dispersing chamomile essential oil into a continuous phase containing an allyl monomer by an SPG membrane emulsification method to form a microemulsion, and preparing the chamomile essential oil microcapsule by combining an interfacial polymerization method; wherein the allyl monomer is prepared from methacrylic acid, methyl methacrylate, pentaerythritol tetraacrylate and N-(4-acetylphenyl) prop-2-acrylamide.