4841 results about "Ethyl ester" patented technology

The invention discloses an absorbable suture line for surgical suture and a preparation method thereof, and relates to the technical field of medical materials. The absorbable suture line for surgical suture is prepared from the following raw materials in parts by weight: 50 to 65 parts of polylactic acid, 15 to 20 parts of polyglycolic acid, 3 to 5 parts of sodium carboxymethyl cellulose, 3 to 8 parts of a toughening agent, 3 to 6 parts of an antibacterial agent, 0.3 to 0.8 part of a lubricating agent, 1 to 2 parts of sodium hyaluronate and 5 to 10 parts of polyvinyl alcohol. The toughening agent is obtained by reacting hydroxyethyl acrylate with ethylenediamine to generate a four-arm compound and then reacting with 6-caprolactone and DL-lactide. The absorbable suture line for surgical suture prepared by the invention has excellent tensile property and antibacterial property, and can meet the application requirements of clinical medical treatment.

The invention belongs to the technical field of environmental protection, and provides a preparation method of an imine-modified functionalized mesoporous magnetic silicon dioxide nano material. The method comprises the following steps: synthesizing Fe3O4 magnetic nanoparticles in a Fe < 2 + > / Fe < 3 + > alkaline hydrolysis system through a coprecipitation method; then coating the magnetic nanoparticles with an amorphous silicon dioxide layer by taking TEOS (tetraethoxysilane) as a silicon source by adopting a sol-gel method, so as to prepare magnetic silicon coated nanoparticles; the prepared nano-particles are subjected to secondary silicon coating guided by a cetyl trimethyl ammonium bromide (CTAB) mesoporous template agent, and mesoporous magnetic silicon nano-particles are formed after calcination; and finally, carrying out surface amination modification on the mesoporous magnetic silicon nano-particles by utilizing an amino silane coupling agent, and then carrying out condensation reaction on the mesoporous magnetic silicon nano-particles and various aldehyde derivatives to construct imine bonds, so as to obtain the imine-modified functionalized mesoporous magnetic silicon dioxide nano-material. The imine-modified functionalized mesoporous magnetic silicon dioxide nano-material formed by the invention has the characteristics of efficient adsorption, rapid magnetic recovery and excellent environmental stability, and can effectively remove polystyrene micro-plastics and organic pollutants in a water body.

The invention relates to a battery monomer, a battery device and a power utilization device, the battery monomer comprises an electrode assembly and an electrolyte, the electrode assembly comprises a positive pole piece, the positive pole piece comprises a positive active material layer, and the positive active material layer comprises lithium-containing phosphate of an olivine structure; the electrolyte comprises, by mass, 8-30% of a carboxylic ester solvent, a lithium salt and an unsaturated ester additive, the lithium salt comprises lithium hexafluorophosphate and fluorine-containing lithium sulfimide, the mass content of the fluorine-containing lithium sulfimide in the lithium salt is 18-45%, the mass content of the unsaturated ester additive in the electrolyte is 0.05-5%, and the mass content of the unsaturated ester additive in the electrolyte is 0.05-5%. The unsaturated ester additive comprises one or more of vinylene carbonate, vinylethylene carbonate, allyl ethyl carbonate and a fluoro-carbonate additive; the amount of electrolyte in the battery cell is 2.8 g / Ah to 3.2 g / Ah. According to the invention, rapid charging and use reliability of the single battery can be considered.

The invention relates to a high-stability bronze powder pigment and a preparation method and application thereof.The preparation method comprises the following steps that copper-zinc alloy coarse powder, stearic acid and a dissolved compound passivator are taken and subjected to ball milling in the nitrogen atmosphere, and a ball milling product is screened, washed and subjected to suction filtration to obtain an amino-functionalized passivated base material; the preparation method comprises the following steps: dispersing SiO2 in anhydrous isopropanol to obtain a reaction system, adding deionized water and a catalyst, dissolving tetraethoxysilane and phenyltriethoxysilane in anhydrous isopropanol, slowly dropwise adding, carrying out a heat preservation reaction, and carrying out suction filtration and washing to obtain a phenyl modified SiO2 coated intermediate; the preparation method comprises the following steps: dispersing a compound stabilizer in anhydrous isopropanol to obtain a mixed system, heating and stirring, dissolving the compound stabilizer in anhydrous isopropanol, dropwise adding into the mixed system, reacting, centrifuging, washing, and drying in vacuum to obtain the bronze powder pigment. The bronze powder pigment disclosed by the invention has excellent oxidation resistance, chemical corrosion resistance and long-term storage stability, and can keep the natural color gloss of metal to the greatest extent.

The invention belongs to the technical field of regenerated polyester, and particularly relates to a waste cotton-polyester blended fabric recycling method which comprises the following steps: firstly, decolorizing a colored waste cotton-polyester blended fabric by adopting a decolorizing agent, then mixing a depolymerizing agent, isosorbide dimethyl ether, a first catalyst and the decolorized cotton-polyester blended fabric, and then carrying out depolymerization reaction, the decolorizing agent and the depolymerizing agent are more than one of dimethyl carbonate, diethyl carbonate and methyl ethyl carbonate, and the temperature of the depolymerizing reaction is 130-150 DEG C; washing the separated cotton fibers with water, and screening to remove residual polyester powder on the surfaces; firstly, terephthalate is converted into DMT, and then DMT, ethylene glycol, a second catalyst and a functional additive are subjected to a repolymerization reaction to obtain regenerated polyethylene glycol terephthalate. According to the method, depolymerization and polyester cotton separation processes are ingeniously fused, so that the operation steps are simplified, the energy consumption is reduced, and the purity of a depolymerization product is also improved.

The imine reductase mutant provided by the invention can catalyze asymmetric reductive amination of ethyl 3-formylhexanoate and (S)-2-aminobutanamide to synthesize brivaracetam, two chiral centers of brivaracetam are constructed in one step, and the problems of poor environmental protection property, low atom utilization rate, long route and the like in the existing industrial synthesis route are solved. Wide application prospects are realized.

The invention discloses an ethylene-vinyl alcohol copolymer and a preparation method thereof, and relates to the technical field of resin. According to the technical scheme, the preparation method comprises the following steps: adding ethylene, low-carbon alkane, alkyl acid ethyl ester, alkyl acid vinyl ester and a carbon-carbon skeleton initiator into a reaction kettle, and carrying out a free radical polymerization reaction; adding a polymerization inhibitor to terminate the reaction, removing low-carbon alkane, unreacted ethylene and alkyl acid vinyl ester, and preparing the reaction liquid into an alcoholic solution; adding a catalyst into the alcohol solution for saponification reaction, and then performing acid pickling, water washing and drying to obtain the ethylene-vinyl alcohol copolymer. The low-carbon alkane which is low in boiling point, easy to vaporize and high in latent heat of vaporization and the saturated alkyl acid ethyl ester with good solubility are adopted as the mixed solvent to replace a traditional alcohol solvent, so that removal and control of reaction heat are facilitated, generation of insoluble gel is reduced, a copolymer with narrow molecular weight distribution is easy to obtain, and the method is suitable for industrial production. The cost that azeotrope formed by the alcohol solvent and the monomer is difficult to separate and recover is greatly reduced, and the production efficiency is improved.

The invention discloses a preparation method of a cell inflammatory factor adsorbent, which comprises the following steps: mixing styrene, divinyl benzene and hydroxyethyl acrylate, and adding a pore-foaming agent and mesoporous SiO2 nano powder to prepare a porous microsphere carrier; the preparation method comprises the following steps: mixing chitosan and poly (N-isopropylacrylamide) in an acetic acid solution to obtain a temperature-sensitive chitosan hydrogel precursor solution; the preparation method comprises the following steps: activating the surface of a porous microsphere carrier by using 1-ethyl-(3-dimethylaminopropyl) carbodiimide and N-hydroxysuccinimide, mixing the activated porous microsphere carrier and a temperature-sensitive chitosan hydrogel precursor solution to obtain a water phase, and assembling, washing and drying in an oil phase to obtain the cell inflammatory factor adsorbent. Through the design of the core-shell structure and the addition of the mesoporous SiO2 nano powder, the temperature response characteristic and the recyclable characteristic are given to the cell inflammatory factor adsorbent, the adsorption capacity of cell factors is also improved, and a new solution is provided for physical adsorption of the cell inflammatory factors.

The invention provides a low-temperature electrolyte, positive electrode slurry and a low-temperature sodium ion battery, and belongs to the technical field of battery materials. The low-temperature electrolyte provided by the invention comprises sodium hexafluorophosphate, propylene carbonate, ethylene carbonate, dimethyl carbonate, methyl ethyl carbonate, fluoroethylene carbonate, 2, 2, 3, 4, 4, 4-hexafluorobutyl acrylate and 1, 1, 2, 2-tetrafluoroethyl-2, 2, 3, 3-tetrafluoropropyl ether. The battery provided by the invention comprises the low-temperature electrolyte. The low-temperature electrolyte and the low-temperature sodium-ion battery provided by the invention not only can be compatible with a blended positive electrode material, but also can give consideration to low-temperature performance, ensure that the prepared low-temperature sodium-ion battery has good reaction kinetics and cycle performance, and also can improve the energy density of an electrode and reduce the resistivity of powder.

The invention relates to the field of drain pipes, and discloses an antibacterial polypropylene noise-reduction drain pipe and a preparation method thereof, the antibacterial polypropylene noise-reduction drain pipe comprises polypropylene, modified glass fiber, an antibacterial additive, a compatilizer and a stabilizer; the modified glass fiber is prepared by performing formylation modification on glass fiber by using 3-aminopropyltriethoxysilane and glutaraldehyde, grafting triethylene tetramine and DOPO into a glass fiber structure, and then grafting a hindered phenol antioxidant; the antibacterial additive is prepared by compounding chitosan Schiff base and modified nano titanium dioxide, the chitosan Schiff base is prepared by utilizing a Schiff base reaction between chitosan and vanillin, and the modified nano titanium dioxide is prepared by utilizing isocyanate propyl triethoxy silane and ethyl glycolate to modify nano titanium dioxide. By adding the modified glass fiber and the antibacterial additive, the pipe is endowed with excellent heat resistance, aging resistance, flame retardance and antibacterial performance.

The invention relates to the field of plastic bags, and discloses a biodegradable plastic bag and a preparation method thereof, the biodegradable plastic bag comprises polylactic acid, poly (butylene adipate-co-terephthalate), a functional additive, modified starch, a lubricant and an antioxidant; the functional additive is prepared by grafting hydroxylated modified castor oil and isocyanated montmorillonite loaded titanium dioxide; the hydroxylation modified castor oil is prepared by modifying castor oil with chloroethyl isocyanate, then reacting with N-allylimidazole, and then reacting with 6-mercaptohexyl-1-alcohol; the isocyanated montmorillonite loaded titanium dioxide is prepared by reacting montmorillonite loaded titanium dioxide obtained by a sol-gel method with isophorone diisocyanate; the modified starch is prepared by reacting octadecanoyl chloride and acryloyl chloride with starch, then carrying out graft copolymerization with ethyl acrylate and further introducing glycidyl methacrylate, so that the plastic bag is endowed with excellent mechanical properties, biodegradability and antibacterial property.

The invention discloses an implantable absorbable PLA composite material and a preparation method thereof, and relates to the technical field of medical materials. The implantable absorbable PLA composite material is prepared from the following raw materials in parts by weight: 60 to 70 parts of PLA, 5 to 10 parts of poly (lactic-co-glycolic acid), 8 to 12 parts of polycaprolactone, 5 to 8 parts of modified hydroxyapatite, 2 to 3 parts of a toughening agent and 0.2 to 0.6 part of an antioxidant, the toughening agent is prepared by the following steps: reacting hydroxyethyl methylacrylate with ethylenediamine to prepare a four-arm compound, reacting the four-arm compound with 1-chloro-4-isocyanatobutane to prepare an isocyanate compound, and finally reacting the isocyanate compound with polyethylene glycol. The implantable absorbable PLA composite material prepared by the invention has excellent tensile property and impact resistance, and can meet the application requirements of clinical medical treatment.

The invention discloses a polyurethane protective adhesive tape for aviation and a preparation method thereof, and relates to the technical field of adhesives. When the polyurethane protective adhesive tape for aviation is prepared, polyester glycol, an ultraviolet absorption monomer, 3-(4-pyridyl) pentane-1, 5-diol, 1, 4-butanediol and isophorone diisocyanate are polymerized to prepare polyurethane; the preparation method comprises the following steps: carrying out a reaction on polyurethane and 2-bromoethyl acrylate to prepare modified polyurethane; enabling the pretreated magnesium hydroxide to react with 3-epoxypropoxy-1, 1, 3, 3-tetramethyldisiloxane and ammonia water in sequence, so as to obtain modified magnesium hydroxide; the modified polyurethane and the modified magnesium hydroxide are mixed and then subjected to compression molding to prepare a polyurethane film; and coating a polyurethane film with the polyacrylate glue solution, and drying to obtain the polyurethane protective adhesive tape for aviation. The polyurethane protective adhesive tape for aviation prepared by the invention has excellent flame-retardant, anti-aging, antibacterial and self-repairing properties.

The invention relates to the technical field of UV paint for floors, in particular to UV paint for SPC floors and a preparation method of the UV paint. The UV paint for the SPC floor is prepared from the following raw materials in parts by mass: 50 to 100 parts of UV resin, 20 to 40 parts of 1, 6-hexanediol diacrylate, 20 to 40 parts of a mixed solvent, 5 to 15 parts of polystyrene microspheres, 1 to 5 parts of tetraethoxysilane, 0.1 to 1 part of sodium dodecyl benzene sulfonate, 0.1 to 1 part of a silane coupling agent, 1 to 2 parts of diphenylmethane diisocyanate, 1 to 2 parts of a flatting agent, 1 to 2 parts of a photoinitiator and 1 to 2 parts of a delustering agent, the UV resin comprises urethane acrylate with the functionality of 2 to 3 and urethane acrylate with the functionality of 4 to 6. The paint film obtained by the invention has the advantages of high curing speed, strong adhesive force, good flexibility and excellent wear resistance, and is especially suitable for preparing SPC floors.

The invention discloses fiber reinforced concrete for bridge deck pavement and a preparation method thereof, and belongs to the technical field of concrete. The fiber reinforced concrete is prepared from the following raw materials: Portland cement, modified basalt fiber, a slow-release mineralizer, a stress-oriented dispersing aid and the like. The modified basalt fiber is a basalt fiber which is subjected to amino silanization through a silane coupling agent KH-550 and then is catalytically grafted with ethylenediamine tetraacetic acid and hydroxyethyl methylacrylate through DCC (dicyclohexylcarbodiimide); the slow-release mineralizer comprises calcium sulphoaluminate and silicon-based coated nano calcium sulfate; the silicon-based coated nano calcium sulfate is core-shell structure powder formed by coating a nano calcium sulfate core material with a silicon dioxide shell layer; the concrete is strong in interface bonding, excellent in dynamic fatigue resistance, good in durability and stable in volume, and the problem that the mechanical property, the durability and the dynamic anti-interference capability of the concrete cannot be considered at the same time is solved.

The invention provides tegorasan monoethyl fumarate as well as a preparation method, a pharmaceutical composition and an application of the tegorasan monoethyl fumarate. The tegorac monoethyl fumarate provided by the invention is relatively good in solubility and good in stability, the bioavailability of a medicine is increased by improving the solubility of the medicine, and the tegorac monoethyl fumarate is suitable for industrial production and has a good market prospect.

The invention belongs to the technical field of polyether polyol, and particularly relates to flame-retardant polyether polyol with a low heat conductivity coefficient as well as a preparation method and application of the flame-retardant polyether polyol. The flame-retardant polyether polyol with the low heat conductivity coefficient is obtained by polymerizing bis (2-hydroxyethyl) aminomethyl diethyl phosphonate, halogen-containing aniline and small molecular alcohol / alcohol amine as a ternary mixed initiator with alkylene oxide under the action of a catalyst, the ternary mixed initiator comprises the following components in percentage by mass: 12.15 to 22.78 percent of bis (2-hydroxyethyl) amino methyl diethyl phosphonate, 43.21 to 63.89 percent of halogen-containing aniline, and 23.96 to 34.01 percent of small molecular alcohol / alcohol amine. The polyether polyol realizes comprehensive properties of lasting flame retardance, high strength and low heat conductivity. The invention also provides a preparation method of the polyether polyol and application of the polyether polyol in rigid polyurethane foam.

The invention relates to the technical field of preparation of building materials, and discloses an ultra-high performance polycarboxylate superplasticizer for UHPC (Ultra High Performance Concrete). The superplasticizer composition comprises the following components in parts by weight: 20-30 parts of ethyl acrylate; 20 to 30 parts of sodium acrylate; the invention also provides a preparation method of the ultra-high performance polycarboxylate superplasticizer for UHPC, and the preparation method comprises the following steps: S1, raw material preparation: dissolving ethyl acrylate, sodium acrylate, sodium allylsulfonate, hexadecyl acrylate and diene peroxide in 50-100 parts of water to form a uniform solution; and S2, mixing and pre-polymerizing. By introducing nano silicon dioxide, an ultrasonic dispersion technology and a low-temperature vacuum dehydration technology, the dispersity and anti-permeability of the water reducing agent and the fluidity of concrete are improved, meanwhile, high strength is kept, and the problems that concrete is uneven in performance and poor in constructability are solved.

The invention relates to the field of organic chemical synthesis, in particular to a synthetic method and application of pyrimidone compounds. The invention provides a synthesis method, reactants are o-amino heterocyclic formamide and triethyl orthoformate respectively, a solvent system is a hexafluoroisopropanol solvent, and a product is a heterocyclic pyrimidone compound. The reaction does not need strong acid or strong alkali conditions, does not need additional reducing agents or oxidizing agents, does not need transition metal catalysis, is economical and practical, the reaction conditions are relatively mild, and the synthesized pyrimidone compound has a good antibacterial effect.

The present invention discloses a high-gloss environmentally friendly UV-curable luminous ink and a preparation method thereof, which belongs to the technical field of UV-curable luminous ink. The ink comprises the following raw materials in parts by weight: 78 to 84 parts of bio-based polyurethane prepolymer, 38 to 45 parts of bio-based acrylate monomer, 10 to 15 parts of modified 2,4,6-trimethylbenzoylphenylphosphonic acid ethyl ester as UV curing initiator, 11 to 16 parts of luminous powder, 7 to 10 parts of micro powder filler, and 4 to 8 parts of auxiliary agent; the bio-based polyurethane prepolymer is obtained by reacting castor oil, resorcinol, fructose and 1,5-pentamethylene diisocyanate in a weight ratio of 8 to 12:2 to 3:13 to 17:4 to 9. In the above manner, the prepared high-gloss environmentally friendly UV-curable luminous ink is coated on a substrate and then subjected to UV light curing treatment (curing energy 2800mJ / cm 2 ), the thickness of the cured film can be controlled more loosely, and the cured film thickness can be controlled at 8-12μm. The cured film has good coating appearance, friction resistance, stain resistance and gloss.

The invention relates to the technical field of polymers, particularly provides a preparation method of acrylic resin and the acrylic resin, and aims to solve the problem of poor water resistance of the existing acrylic resin. Therefore, the preparation method of the acrylic resin comprises the following steps: S2, mixing and heating a refined styrene compound and a mixed solvent, and adding a catalyst for reaction; s3, stopping heating the reaction system after the reaction in the step S2, recovering to room temperature, and adding an acrylate compound for reaction; s4, adding a modifier into a reaction system after the reaction in the step S3, and reacting; and S5, adding tetraethoxysilane, ammonia water and n-butyl alcohol into the reaction system after the reaction in the step S4 for reaction, then adding an alcohol solvent to precipitate a polymer, and drying to obtain the acrylic resin. The acrylic resin prepared by the preparation method provided by the invention has excellent water resistance and impact hardness.

The invention discloses a preparation method of a WS2 / MXene / HBPSi synergistically enhanced epoxy resin composite material. The preparation method specifically comprises the following steps: preparing a WS2 / MXene hybrid from few-layer MXene powder, WCl6 and a sulfur source precursor; the preparation method comprises the following steps: uniformly mixing tetraethoxysilane, neopentyl glycol and triethanolamine, and carrying out gradient heating reaction to obtain HBPSi; epoxy resin EP is used as a resin matrix, DDS is used as a curing agent, a WS2 / MXene hybrid is used as a lubricating additive, HBPSi is used as a toughening agent, and the epoxy resin composite material is prepared by combining a melt blending process with a staged heating curing method. According to the method, the toughness and the interface bonding strength of the material are remarkably improved by introducing HBPSi, the friction coefficient of the material is effectively reduced and the wear resistance is improved through the synergistic effect of WS2 and MXene, and cooperative regulation and control of structural strengthening and friction performance improvement are achieved.

The invention relates to the technical field of medicines, in particular to a sustained-release coating as well as a preparation method and application thereof. The coating adopts a three-layer gradient structure design and comprises an inner layer coating, a middle layer coating and an outer layer coating, and the layers are compounded and matched through ethyl cellulose and hydroxypropyl methylcellulose with different molecular weights and are combined with talcum powder filling amount with gradient decreasing and a triethyl citrate plasticizer, so that accurate regulation and control of drug release are realized. Through hierarchical swelling-diffusion dynamic balance, burst release is inhibited, the inner layer has high talcum powder content to resist initial swelling stress, the outer layer has low filling amount to maintain hydrophobic continuity, interface defects are reduced in combination with high-temperature curing, and the release stability and long-term storage performance of drugs such as dihydroergoline mesylate are remarkably improved; the problems of sudden release, damp-heat sensitivity, impurity generation and the like of a traditional single-layer coating are solved.

The present invention provides: a fermented beer-like sparkling beverage having a real fermentation degree of 60% or less and a value of ([real extract (w / v%)]-[real final extract (w / v%)]) / [real extract (w / v%)] × 100 of 20% or less; the fermented beer-like sparkling beverage having a value of [original wort extract (w / v%)] × [malt ratio (w / w%)] of 1200 or less; and any one of the above-mentioned fermented beer-like sparkling beverages, in which the ratio (Es / HA) of the total concentration (mg / L) (HA) of ethyl acetate, isoamyl acetate, ethyl caproate, ethyl caprylate, and β-phenethyl acetate to the total concentration (mg / L) (Es) of isobutanol, isoamyl alcohol, and β-phenethyl alcohol in the beverage is 15% or less.

The invention discloses a medical washable high-temperature-resistant modified polyester fiber fabric and a preparation method thereof, and relates to the technical field of fabrics. The medical washable high-temperature-resistant modified polyester fiber fabric prepared by the invention is obtained by blending, spinning and weaving modified polyester and modified mica and activating with sodium hypochlorite; the modified polyester is obtained by grafting organic silicon modified polyester with n-dodecanethiol and then reacting with bromooctylhydantoin; the modified mica is prepared by polymerizing diethyl phosphite and bisphenol S on the surface of the pretreated mica, grafting a vinyl monomer and then reducing; the vinyl monomer is obtained by carrying out a reaction on 1-allyl-3-cyano-6-hydroxy-4-methyl-2-pyridone and an azo salt, and the vinyl monomer is obtained by carrying out a reaction on 1-allyl-3-cyano-6-hydroxy-4-methyl-2-pyridone and an azo salt; the medical washable high-temperature-resistant modified polyester fiber fabric prepared by the invention has good antibacterial, anti-aging and flame-retardant properties.

The invention relates to the technical field of hydraulic fracturing exploitation of deep / ultra-deep oil and gas reservoirs, and discloses a gel-coated temporary plugging agent and a preparation method and application thereof.The gel-coated temporary plugging agent comprises a proppant inner core and a degradable gel shell coating the outer surface of the proppant inner core; the degradable gel shell is formed by a gel shell gelling solution, the gel shell gelling solution comprises small-molecule comonomers and a degradable cross-linking agent, and the small-molecule comonomers comprise acrylamide, N, N-dimethylformamide, N, N-dimethylformamide, N, N-dimethylformamide, N, N-dimethylformamide, N, N-dimethylformamide, N, N-dimethylformamide the initiator is one or more of N, N-dimethylacrylamide, acrylic acid, hydroxyethyl acrylate, benzyl acrylate, 2-propyl acrylic acid, 2-acrylamide-2-methylpropanesulfonic acid and N-vinyl pyrrolidone; and the initiator is one or more of N, N-dimethylacrylamide, acrylic acid, hydroxyethyl acrylate, benzyl acrylate, 2-propyl acrylic acid, 2-acrylamide-2-methylpropanesulfonic acid and N-vinyl pyrrolidone. The gel-coated temporary plugging agent can be used for effectively plugging in a fracturing time period at high temperature / ultrahigh temperature, and the flow conductivity of fractured cracks can be enhanced by exposing an internal propping agent after the gel-coated temporary plugging agent is degraded.

The invention discloses flame-retardant recyclable compressible biodegradable cellulose aerogel and a preparation method and application thereof.The preparation method comprises the following steps that 1, phosphorus / nitrogen-containing bridged organosiloxane and tetraethyl orthosilicate are added into bacterial cellulose dispersion liquid and stirred to be uniform, and a milk white dispersion solution is prepared; (2) heating, curing, pre-freezing and freeze-drying the milky white dispersion solution to obtain the flame-retardant recyclable compressible biodegradable cellulose aerogel, and the phosphorus / nitrogen-containing bridged organosiloxane is prepared by carrying out a reaction on phosphonitrilic chloride trimer and 3-aminopropyltriethoxysilane. The prepared cellulose aerogel is excellent in flame retardance, heat insulation and cyclic compression performance, and has a feasible application prospect in the aspect of radiation refrigeration.

The invention discloses compression-resistant glass and a preparation method thereof, and relates to the technical field of special glass. When the compression-resistant glass is prepared, an anorthite crystal phase is used as a main material, a wollastonite crystal phase is used as an auxiliary material, and zinc, barium, boron, sodium, antimony and titanium elements are added, so that the compression-resistant glass ceramic is prepared; the preparation method comprises the following steps: mixing tetraethoxysilane, zirconium oxychloride octahydrate and 3-glycidyl ether oxypropyl trimethoxy silane, adding hydrochloric acid, and stirring to obtain modified sol; the preparation method comprises the following steps: mixing hydroxyl-terminated polysiloxane, trimethyl ethyoxyl silane, methyl triethyoxyl silane and octadecyl triethyoxyl silane, adding a hydrochloric acid solution, and reacting to prepare an organosilane modified solution; mixing the modified sol and the organosilane modified solution, coating the surface of the compression-resistant microcrystalline glass with the mixture, and curing to obtain the compression-resistant glass. The compressive glass prepared by the invention has the advantages of high compressive strength, hydrophobicity, wear resistance and high surface hardness.

The invention relates to the technical field of metal material hot working, and discloses a hot-rolled coiled plate production process which comprises the following steps: preparing a reaction type protective agent, the high-temperature-resistant coating is prepared from the following raw materials in parts by weight: 20 to 40 parts of tetraethoxysilane, 5 to 15 parts of triethyl phosphate, 1 to 5 parts of triethyl borate, 0.5 to 2.0 parts of cerous nitrate (III) hexahydrate, 0.1 to 1.0 part of lithium acetate and 0.01 to 0.05 part of vanadyl acetylacetonate (IV). Coating the surface of a hot-rolled plate blank with the protective agent; the coated plate blank is heated in a heating furnace, so that the protective agent forms a molten-state protective layer in situ; carrying out hot rolling on the plate blank with the molten protective layer; and cooling and coiling the hot-rolled steel strip. In the whole heating and hot rolling process, the molten protective layer isolates the contact between the steel and the oxidizing atmosphere, so that the generation of oxide scales is fundamentally inhibited, the production process is simplified, and the metal yield is increased.

The invention provides a fluorine-containing acrylate pressure-sensitive adhesive as well as a preparation method and application thereof, and the fluorine-containing acrylate pressure-sensitive adhesive is prepared from the following raw materials in parts by weight: 30-70 parts of a soft monomer; 10 to 40 parts of a hard monomer; 1-40 parts of a fluorine-containing monomer; 1-10 parts of a functional monomer; 0.1 to 0.3 part of a thermal initiator; 100 to 300 parts of a solvent; the fluorine-containing monomer comprises any one or a combination of at least two of trifluoroethyl acrylate, hexafluorobutyl acrylate, hexafluorobutyl methacrylate, hexafluoroisopropyl acrylate, octafluoroamyl acrylate, dodecafluoroheptyl acrylate, dodecafluoroheptyl methacrylate and tridecafluorooctyl methacrylate. The wafer cutting adhesive tape prepared from the fluorine-containing acrylate pressure-sensitive adhesive provided by the invention has relatively good stripping performance, high temperature resistance and hydrophobicity.