644 results about "Methyl methacrylate" patented technology

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 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.

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 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 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 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 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.

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.

The invention provides a thermoplastic bistable tube and a preparation method thereof, and belongs to the technical field of high polymer materials. The preparation method of the thermoplastic bistable tube comprises the following steps: mixing PMMA (polymethyl methacrylate) and MMA (methyl methacrylate) monomers to obtain a binary resin solution, and adding an oxidizing agent and a reducing agent into the binary resin solution for secondary mixing to obtain a solution for filling; and compounding the solution for perfusion and the continuous fibers through a vacuum or high-pressure flow guide forming method, and then curing to obtain the thermoplastic bistable-state tube. The PMMA / MMA binary resin mixed solution is adopted, implosion cannot occur, the performance of the composite material cannot be damaged, electric energy does not need to be consumed for heating, the design cost and the machining cost of the composite material mold are reduced, and double cost saving and efficiency increasing are achieved.

The invention discloses a Micro-LED device based on a charge compensation method and a preparation method of the Micro-LED device, relates to the technical field of nano luminescent materials and display, and solves the problems that the luminous efficiency of the Micro-LED device is reduced, the driving voltage is increased, the service life of the device is shortened and the like due to reduction of the crystal size during Mn < 4 + > doped fluoride nanocrystalline through Mg < 2 + > charge compensation. The Micro-LED device sequentially comprises a driving substrate layer, a blue light Micro-LED array layer, a light extraction layer, a color conversion layer and a packaging layer from bottom to top; the light extraction layer is a titanium dioxide nanoparticle layer; the color conversion layer is a Micro-LED device formed by mixing a solution of dispersed silver silicon core shell-cesium sodium manganese fluoride composite nanomaterial Ag (at) SiO2 / Cs2NaF6: Mn < 4 + > and Mg < 2 + > nanocrystal particles with a methyl methacrylate solution and coating the mixture on a substrate. By introducing the Micro-LED color conversion layer based on the charge compensation method, lattice charge unbalance is neutralized, lattice defects are reduced, and formation of a Micro-LED device with high brightness and high stability is facilitated.

The application provides a composite imprinting polymer and a preparation method and application thereof, and belongs to the field of compound extraction.The composite imprinting polymer comprises a core, a shell and a shell;the core comprises Fe3O4 and SiO2 coated on the Fe3O4;the shell comprises MOF material and imprinting polymer coated on the MOF;raw materials for preparing the imprinting polymer comprise a template molecule, a functional monomer, a crosslinking agent and an initiator;the template molecule is quercetin;the functional monomer comprises two of methyl methacrylate, styrene, 4-vinylpyridine and acrylamide; and the crosslinking agent comprises ethylene glycol dimethacrylate.The material has the triple advantages of magnetic rapid separation, high specific surface area of MOF and specific recognition of molecular imprinting, and exhibits high adsorption capacity and excellent selectivity for quercetin.

This invention relates to a styrene-butadiene copolymer composition, its preparation method, and its applications, belonging to the field of polymer materials technology. The styrene-butadiene copolymer composition of this invention comprises the following components in parts by weight: 40-65 parts of styrene-butadiene copolymer, 9-34 parts of styrene-methyl methacrylate copolymer A, 20-40 parts of heat-resistant modifier, 5-10 parts of phase regulator, and 0.5-5 parts of haze regulator. This styrene-butadiene copolymer composition not only possesses good heat resistance but also high transparency and is easy to demold.

The invention relates to a PVP-b-PMMA (Polyvinyl Pyrrolidone-b-Polymethyl Methacrylate) block polymer, a preparation method thereof and an ultrafiltration membrane. The PVP-b-PMMA block polymer is prepared from the following raw materials: N-vinyl pyrrolidone and methyl methacrylate according to a mass ratio of 1 to (0.3 to 4); the preparation method of the PVP-b-PMMA block polymer comprises the following step: carrying out atom transfer radical polymerization on N-vinyl pyrrolidone and methyl methacrylate to obtain the PVP-b-PMMA block polymer. According to the preparation method disclosed by the invention, the PVP-b-PMMA block polymer with excellent performance is prepared by designing the mass ratio of the raw materials of N-vinyl pyrrolidone (NVP) and methyl methacrylate (MMA) for preparing the PVP-b-PMMA block polymer. The filtering membrane prepared from the PVP-b-PMMA block polymer can realize the synergistic improvement of high flux, retention rate, pollution resistance and stability.

The invention discloses a photostimulation response material which is characterized in that a < 7 > H-benzo [c] carbazole group or a < 7 > H-dibenzo [c, g] carbazole group is connected to the site 2 of 9-thioxanthone to construct a thioxanthone derivative, and the thioxanthone derivative is doped in a polymethyl methacrylate matrix to form a composite film, so that the photostimulation response material has a remarkable photostimulation response characteristic; the light color of the film is changed after the film is subjected to ultraviolet radiation for 10 seconds, afterglow emission of s level appears, and the film can be applied to the technical field of information encryption and security anti-counterfeiting.

Prepared is a laminate including: a first layer formed of a first resin composition containing a first resin; and a second layer formed of a second resin composition containing a second resin, the first layer and the second layer being in contact with each other and integrated. The first resin includes an alicyclic polyamide resin having 20 mmol / kg or greater of amino groups, and the second resin includes an acid-modified (meth)acrylic resin. The second resin may have 100 mmol / kg or greater of carboxyl groups. The acid-modified (meth)acrylic resin may be an acid-modified polymethylmethacrylate resin. An average thickness of the first layer may be 0.15 times or more of an average thickness of the second layer. The average thickness of the first layer may be 200 μm or greater. When a weight is dropped onto the second layer side, the laminate may have a DuPont impact strength of 500 N / inch or greater. The laminate has excellent transparency, lightness, light resistance, and impact resistance.

To provide a plastic optical fiber cable excellent in long-term heat resistance in a high-temperature environment.SOLUTION: A plastic optical fiber cable includes a core including a polymer having a methyl methacrylate unit and at least one cladding layer provided on an outer peripheral surface of the core, and a coating layer coating an outer peripheral portion of the optical fiber, wherein the coating layer includes a polyamide-based resin (A), and the polyamide-based resin (A) is an aliphatic polyamide resin having an amide group ratio (N1 / N2) which is a ratio of the number of methylene carbon atoms (N1) in the skeleton to the number of amide group carbon atoms (N2) of 7 or more and 10 or less.SELECTED DRAWING: Figure 1

The invention relates to fluorine-containing epoxy acrylate and a preparation method thereof, in particular to fluorine-containing epoxy acrylate and a preparation method thereof. The problems that in the prior art, bonding of nano particles is not firm, and the transparency of a coating is poor are solved. The method comprises the following steps: dissolving tridecafluorooctyl methacrylate, glycidyl methacrylate, a KH-570 silane coupling agent and an initiator by using 1, 4-dioxane as a solvent, introducing high-purity nitrogen into a reaction container for a certain time to remove oxygen in the reaction container so as to prevent polymerization inhibition, controlling the reaction temperature and the stirring rate, and reacting for a certain time to obtain the tridecafluorooctyl methacrylate. Keeping the introduction of nitrogen; contacting the reaction system with oxygen, cooling and quenching the polymerization reaction; adding the reaction liquid into cyclohexane of which the weight is five times that of the reaction liquid to remove unreacted monomers; drying the purified product in a vacuum oven, and grinding into powder; and cleaning commercially available filter paper with acetone. The invention belongs to the technical field of acrylic resin synthesis and superhydrophobicity.

The thermal donor laminate system includes a release agent such as APS-705, APS-706, or APS-707. The thermal donor laminate system further includes polyvinyl acetal, poly(methyl methacrylate), cellulose acetate propionate, methacrylate beads dispersed in the thermal donor laminate system, an ultraviolet absorber agent, and toluene and methanol as solvents. The thermal donor laminate system is scratch resistant up to approximately 1000 grams.

The invention discloses a process method for continuous synthesis of MMA (methyl methacrylate) in a Mo-Bi-Fe multi-metal oxide catalyst system by taking isobutene as a unique C4 raw material. The method comprises the following steps: firstly, carrying out selective oxidation on isobutene into methylacrolein on a Mo-Bi-Fe catalyst under the conditions that the temperature is 320-360 DEG C and the pressure is 0.10-0.25 MPa (absolute pressure) by combining segmented oxygen supply with steam coverage regulation and control and cooperating with molten salt isothermal heat exchange; then selectively oxidizing methylacrolein into methacrylic acid on a Mo-V-(Te / Nb / W / P) composite oxide catalyst under the conditions that the temperature is 260-290 DEG C and the pressure is 0.10-0.25 MPa (absolute pressure) through matching of axial temperature partitioning and segmented oxygen feeding; and in a continuous esterification system in which reactive distillation and pervaporation or membrane distillation are coupled, performing esterification and continuous water removal under the conditions that the temperature of a tower kettle is 65-85 DEG C and the pressure in the tower is 0.08-0.15 MPa (absolute pressure) by taking strong-acid cation exchange resin as a catalyst, so as to obtain an MMA finished product. According to the method, high selectivity and low chromaticity are realized under industrial load, the MMA purity is greater than or equal to 99.90 wt%, and the water content is less than or equal to 30ppm.

The application discloses a method for constructing a hydrogel-based chip by 3D printing assisted water-phase front polymerization, and relates to the technical field of functional polymer material preparation; gelatin is dissolved in water to form uniform ink, a 3D printer is used to print channels and transfer the channels to a culture dish, and gelatin supports are arranged at two ends of the channels; methyl methacrylate gelatin monomers, acrylic acid monomers, a polymerization inhibitor, an initiator and a crosslinking agent are dissolved in water and injected into the culture dish; an electric iron is used to heat to 100 DEG C, and after the polymerization reaction is completed, the gelatin supports are removed, the channels are cleaned in water at 60 DEG C, and the hydrogel-based chip is obtained. The method has the advantages of high speed, high efficiency, low cost, fast molding and the like, provides a path for realizing the preparation of a complex hydrogel chip, and has high application value in the fields of biology and chemical engineering.

The invention belongs to the technical field of solar cells, and discloses a flexible silicon substrate-indium phosphide solar cell and a preparation method thereof. The flexible silicon-based indium phosphide solar cell comprises a lower electrode, a flexible silicon solar cell, a first transparent conductive layer, a conductive adhesive, a second transparent conductive layer and an indium phosphide solar cell which are sequentially stacked from bottom to top, an antireflection film layer and an upper electrode are arranged on the indium phosphide solar cell; the conductive adhesive is obtained by dispersing polymethyl methacrylate microspheres coated with metal on the surface into an EVA solution. Heterogeneous integration is achieved through the transparent conductive adhesive, the two-end laminated cell is formed, the device is light, thin and flexible, the defects that a traditional four-end laminated cell is rigid, heavy, large in optical loss and the like are overcome, and the solar cell has good performance.