735 results about "Methacrylamide" patented technology

The invention provides a temperature-resistant and salt-resistant cross-linking tackifying filtrate reducer for a soil-phase-free water-based drilling fluid as well as a preparation method and application of the temperature-resistant and salt-resistant cross-linking tackifying filtrate reducer, and belongs to the technical field of drilling. The temperature-resistant and salt-resistant cross-linking tackifying filtrate reducer for the soilless phase water-based drilling fluid comprises the following raw materials in parts by weight: N, N-dimethylformamide, a cross-linking agent and a cross-linking agent, the invention relates to a water-based adhesive which is prepared from the following components in parts by weight: 15 to 25 parts of N, N-dimethylacrylamide, 1 to 10 parts of 3-[(3-methacrylamidopropyl) dimethylammonium] propane-1-sulfonate, 1 to 10 parts of long-chain alkyl polyoxyethylene ether methacrylate, 0.005 to 0.015 part of macromolecular cross-linking agent, 0.03 to 0.08 part of initiator A and 80 to 100 parts of deionized water. The tackifying filtrate reducer can resist the temperature of 180 DEG C, can resist NaCl to be saturated, has excellent tackifying, shear-improving and filtrate-reducing effects under high-temperature and high-salt conditions, improves the rheological property and the filtrate-reducing property of drilling fluid, and ensures safe and efficient drilling of a deep well.

The invention provides a salt-responsive temperature-resistant salt-resistant water-based drilling fluid tackifying filtrate reducer as well as a preparation method and application thereof, and belongs to the technical field of drilling. The tackifying filtrate reducer is prepared from the following raw materials in parts by mass: 30 to 50 parts of 1-(2-carboxyethyl)-2-vinylpyridine, 20 to 40 parts of (3-(methacrylamido) propyl) dimethyl (3-thiopropyl) ammonium hydroxide inner salt, 35 to 55 parts of N, N-dimethylacrylamide, 10 to 25 parts of 4-vinylpyridine, 300 to 500 parts of water and 1 to 5 parts of an initiator. According to the filtrate reducer, cations and anions are concentrated on one monomer molecule, so that the synthesized product contains the cations and the anions with the same charge number, has good adsorption capacity and salt response characteristics, is compatible with salt essentially, can effectively resist high temperature and high salt, and can be recycled. And the viscosity-increasing and filtrate-reducing agent has good viscosity-increasing and filtrate-reducing effects on the drilling fluid.

The invention relates to a preparation method and application of a Janus structure photo-thermal-piezoelectric hydrogel dressing for infected wound repair, and the preparation method comprises the following steps: respectively dissolving phenylboronic acid grafted methacrylamide gelatin and dopamine grafted hyaluronic acid in deionized water, adding MXene coated CeO2 heterojunction, and ultrasonically dispersing uniformly, so as to obtain the Janus structure photo-thermal-piezoelectric hydrogel dressing for infected wound repair. After mixing, sodium hydroxide is used for adjusting the pH value to alkalescence, and a Janus structure inner layer is formed; respectively dissolving phenylboronic acid grafted gelatin and o-nitrobenzyl alcohol grafted hyaluronic acid in deionized water, adding BaTiO3, ultrasonically dispersing uniformly, and mixing to form a Janus structure outer layer; the Janus structure photo-thermal-piezoelectric hydrogel dressing prepared by the invention has the characteristic of space-time release so as to adapt to the wound repair process, in addition, the Janus structure photo-thermal-piezoelectric hydrogel dressing also has excellent photo-thermal conversion performance, bacteria infecting the wound are killed through photo-thermal heating, physiological electric signals are effectively simulated through the piezoelectric effect, cell behaviors are regulated and controlled, and the Janus structure photo-thermal-piezoelectric hydrogel dressing can be used for wound infection repair.

The invention discloses a temperature / CO2 dual-response zwitterionic hydrogel profile control agent, which is prepared by taking a monomer A, a monomer B and a monomer C as raw materials, adding a cross-linking agent and an initiator, and carrying out polymerization reaction in a water medium. The monomer A is selected from any one of acrylamide, acrylic acid and 1-vinyl-2-pyrrolidone; the monomer B is selected from any one of [2-(methacryloyloxy) ethyl] dimethyl-(3-sulfopropyl) ammonium hydroxide, 2-methacryloyloxyethyl phosphorylcholine and 3-((2-(methacryloyloxy) ethyl) dimethylamino) propionic acid inner salt; and the monomer C is selected from any one of 2-(dimethylamino) ethyl methacrylate, dimethylamino propyl methacrylamide and polyethyleneimine. The profile control agent has double swelling mechanisms, has outstanding temperature and salt resistance, resists 220000 mg / L of mineralization water, is suitable for high-salt reservoirs, and is good in long-term aging property.

The invention relates to hydrogel loaded with oxygen self-producing nanoparticles as well as a preparation method and application of the hydrogel. The preparation method comprises the following steps: 1, taking cross-linked methacrylamide silk fibroin and hyaluronic acid modified by arginine-glycine-aspartic acid peptide as base materials, and loading self-oxygen-producing nano particles CaO2 (at) PVP (at) Cu-EGCG, and the self-oxygen-producing nano particles CaO2 (at) PVP (at) Cu-EGCG are prepared by coating Cu-EGCG on calcium peroxide nano particles modified by PVP modified polyvinylpyrrolidone. The hydrogel can improve energy metabolism and regulate immune environment through dual mechanisms, realizes efficient promotion of myocardial repair, and provides a new strategy and thought for tissue regeneration and functional recovery after myocardial infarction.

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

The invention relates to the technical field of 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 high-adhesion port machine lubricating grease and a preparation method thereof, and relates to the technical field of lubricating material preparation and application, the high-adhesion port machine lubricating grease is prepared from the following components by weight: 60-80 parts of base oil, 3-5 parts of a functional copolymer, 0.1-0.6 part of Meso-tetramethyl-meso-tetra (p-aminophenyl) calix [4] pyrrole, 0.1-0.6 part of 1, 2, 4-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1 The lubricating oil comprises the following components in parts by weight: 0.3-0.5 part of 1, 3-diaminothiourea, 3-5 parts of molybdenum sulfide nanosheets, 0.5-1 part of an antirust agent, 0.1-1 part of a dispersing agent, 2-4 parts of an antioxidant and 0.3-0.6 part of modified rosin. The functional copolymer comprises a structural unit introduced by the following monomers: bis (trimethylsilylated) vinyl phosphate, 4-methyl-5-vinylthiazole, N-(4-cyano-3-trifluoromethylphenyl) methacrylamide and vinyl boronic acid pinacol ester. The lubricating grease is high in adhesive force and excellent in extreme pressure wear resistance, salt mist resistance and damp heat resistance.

The invention belongs to the technical field of dressing preparation, and particularly relates to a preparation method of a photocuring methacrylated gelatin hydrogel dressing, which comprises the following steps: step 1, dissolving methacrylated gelatin in a phosphate buffer solution to prepare a methacrylated gelatin solution with the mass concentration of 5-15%; 2, adding a natural photoinitiator into the solution obtained in the step 1, and uniformly stirring and mixing; 3, adding the traditional Chinese medicine active ingredient powder, and stirring until the powder is uniformly dispersed to obtain a mixed solution; and 4, pouring the mixed solution into a mold, and curing and molding under the irradiation of visible light. Chlorophyll or riboflavin is used as a natural photoinitiator and is directly dispersed in a methacrylated gelatin solution in a physical blending mode, a curing light source enables chlorophyll to completely avoid a chemical initiator, meanwhile, the process is simplified into physical stirring to replace nanoparticle synthesis and modification, visible light reduces the risk of tissue burn, the production cost is reduced, and the method is suitable for industrial production. The method is suitable for primary medicine.

The invention relates to a novel salt-resistant drilling fluid filtrate reducer and a preparation method thereof, and belongs to the technical field of drilling fluid filtrate reducers, the novel salt-resistant drilling fluid filtrate reducer comprises the following raw materials by weight: 15-20 parts of N, N-dimethylacrylamide, 10-14 parts of 2-acrylamido-2-methylpropanesulfonic acid, 6-8 parts of N-vinyl pyrrolidone, 0.9-1.2 parts of a silane coupling agent KH570, and 1-3 parts of nano clay. The adhesive is prepared from the following components in parts by weight: 5-6 parts of polyethylene glycol, 0.5-0.8 part of hexadecyl methyl ammonium bromide, 20-30 parts of hydroxyethyl cellulose, 0.5-1 part of an initiator, 0.3-0.5 part of a cross-linking agent and 60-70 parts of deionized water. The filtrate reducer disclosed by the invention has excellent salt resistance, filtrate reduction performance and good thermal stability.

The invention discloses a high-thermal-conductivity PI / ceramic composite insulation packaging sheet and a preparation method thereof, and relates to the technical field of electronic packaging. The high-thermal-conductivity PI / ceramic composite insulation packaging sheet is obtained by mixing a modified polyimide solution and modified ceramic particles according to the mass ratio of (9-13): 1 and then performing high-temperature curing. The modified polyimide solution is obtained by mixing a dianhydride monomer and a diamine monomer in a molar ratio of 1: 1, and 2-methyl-2-acrylic acid-2, 3-dihydroxy propyl ester accounting for 5-10% of the total molar weight, and adding a catalyst for catalysis; the modified ceramic particles are obtained by adding hydroxymethyl acrylamide into a ceramic suspension, mixing, filtering, washing and drying. The packaging sheet prepared by the invention has high thermal conductivity, keeps stable at a relatively high temperature, is not easy to thermally deform, and has relatively high stability.

The invention discloses a red xanthene dye for blue photoresist color paste and a synthesis method of the red xanthene dye, and the synthesis method comprises the following steps: (1) sulfonyl chlorination reaction: carrying out sulfonyl chlorination reaction on xanthene molecules B containing two sulfonate radicals by using a chlorination reagent, and carrying out post-treatment to obtain a sulfonyl chloride intermediate C; and (2) esterification reaction: carrying out esterification reaction on the sulfonyl chloride intermediate C obtained in the first step by utilizing an esterification reagent, and carrying out post-treatment to obtain the target red xanthene dye A with methacrylamide at the tail end. The invention provides a novel xanthene dye molecule which can be mixed with a blue pigment color paste to prepare a blue photoresist color paste for improving the brightness of the color paste. In addition, the liquid crystal composition has the advantages of high transparency, high contrast ratio, good dispersity, relatively high covering power, tinting strength and the like, and is good in thermal stability and light stability; meanwhile, the synthesis method provided by the invention is simple, low in cost and easy for large-scale production.

The invention relates to hemostatic nano hydrogel particles as well as a preparation method and application thereof. The hemostatic nano hydrogel particles are prepared from the following raw materials in parts by weight: 40 to 50 parts of mesoporous silica nano particles, 20 to 33 parts of thrombin, 25 to 50 parts of methacrylamide gelatin and 0.5 to 1.25 parts of a photoinitiator. The invention further provides a hemostasis system composed of the nano hydrogel particles and an initiation light source. The hemostatic hydrogel particles prepared by the invention can trigger rapid blood coagulation at a wound part under illumination and can be continuously adhered to the wound part, and the hemostatic hydrogel particles have the effects of keeping thrombin activity, reducing the risk of bleeding after treatment and improving the hemostatic capability.

The invention belongs to the technical field of lithium ion battery solid electrolytes, and discloses a multi-component in-situ polymerized gel solid electrolyte and a preparation method and application thereof, the gel solid electrolyte is prepared by adding an amide cross-linking agent and a polymeric monomer into a basic electrolyte to obtain a precursor solution, then adding an initiator, and carrying out in-situ polymerization at 45-70 DEG C for 6-12 hours, the amide cross-linking agent is one or more of N, N '-methylene bisacrylamide, polyacrylamide, poly (2-acrylamide-2-methyl-1-propanesulfonic acid), polymethacrylamide, polyethylene glycol diacrylamide, polyether amide or adipamide. The first coulombic efficiency of an LCOLi button cell assembled by the multi-component in-situ polymerization solid-state gel electrolyte reaches 94.81%, the capacity retention rate after 500 cycles at 3-4.6 V still reaches 80% or above, and the LCOLi button cell can safely pass a needle test and can be applied to the field of solid-state electrolytes.

The invention provides a temperature-resistant and salt-resistant wall-fixing agent for a water-based drilling fluid for a myriameter deep well as well as a preparation method and application of the wall-fixing agent, and belongs to the technical field of drilling. The preparation method of the wall fixing agent comprises the following steps: adding acrylic acid into deionized water, adjusting the pH value of a system to 7.0, then sequentially adding N-hydroxymethyl acrylamide, N-[2-(3, 4-dihydroxyphenyl) ethyl]-2-acrylamide, an emulsifier, octadecyl vinyl ether and a complexing agent into the system, and shearing to obtain a monomer solution; adding an initiator into the monomer solution, and reacting; and after the reaction is completed, washing, drying and crushing to obtain the wall fixing agent. The wall fixing agent can resist the temperature of 200 DEG C, can resist the salt to be saturated, has strong adsorbability and high cohesion, and can effectively adsorb, block and bond micropores and micro cracks of rocks, so that the rocks are solidified, the well wall stability is effectively enhanced, drilling fluid leakage is prevented, and a technical guarantee is provided for safe and efficient drilling of deep wells.

The application provides a temperature-resistant and salt-resistant wall stabilizer for a ten-thousand-meter deep well water-based drilling fluid and a preparation method and application thereof, and belongs to the technical field of drilling. The preparation method of the wall stabilizer comprises the following steps: acrylic acid is added into deionized water, the pH of the system is adjusted to 7.0, then N-hydroxymethyl acrylamide, N-[2-(3,4-dihydroxyphenyl)ethyl]-2-acrylamide, an emulsifier, octadecyl vinyl ether and a complexing agent are sequentially added into the system, shearing is performed, a monomer solution is obtained, an initiator is added into the monomer solution, and reaction is performed; after the reaction is completed, washing, drying and crushing are performed, and the wall stabilizer is obtained. The wall stabilizer has a temperature resistance of 200 DEG C and a salt resistance of saturation, has strong adsorption and high cohesion, can effectively adsorb, plug and cement micro-pores and micro-cracks of rocks, thereby consolidating the rocks, effectively enhancing the well wall stability, preventing drilling fluid leakage and providing technical support for safe and efficient drilling of deep wells.

The invention discloses a water-non-dispersible cement paste system for well cementation. The water-non-dispersible cement paste system comprises the following components in parts by weight: 100 parts of oil well cement, 2-3 parts of an expanding agent, 1-5 parts of an anti-dispersing agent, 0.5-2 parts of a drag reducer, 0-0.1 part of a defoaming agent and 40-45 parts of water, the anti-dispersing agent is formed by copolymerizing the following components in percentage by mass: 15 to 60 weight percent of acrylic acid, 0 to 15 weight percent of N, N-dimethyl acrylamide, 30 to 85 weight percent of acrylamide, 0 to 10 weight percent of N-vinyl pyrrolidone and 0 to 1.5 weight percent of ethylene diamine tetraacetic acid disodium salt; the drag reducer is obtained by graft polymerization of a polyacrylic acid monomer and fatty acid vinyl ester in a molar ratio of (8-36): 1; the polyacrylic acid monomer is formed by copolymerizing 2-acrylamido-2-methylpropanesulfonic acid, acrylic acid, sodium p-styrenesulfonate and acrylamide according to a molar ratio of (0.08 to 0.6): 1: (0.05 to 0.3): (0.1 to 1); the water non-dispersible cement paste system for well cementation has good dispersion resistance and flowing property, and the water invasion resistance of the cement paste is effectively improved.

The invention discloses a preparation method of a solid-state polymer composite electrolyte material and application of the solid-state polymer composite electrolyte material in an all-solid-state battery, and relates to the technical field of all-solid-state lithium ion batteries, and the preparation method comprises the following steps: firstly synthesizing a skeleton filler, adding an acid solution, and then carrying out ultrasonic treatment, soaking, centrifuging and washing to obtain an acid-modified skeleton filler; dispersing the acid-modified skeleton filler in an organic solution, adding a lithium salt, stirring, centrifuging, and washing to obtain a lithiated skeleton filler; weighing an electrolyte salt, adding the electrolyte salt into the polymer precursor, adding the lithiated skeleton filler, uniformly mixing, and drying to obtain a dried product; and finally, rolling the dried product into a thin film to obtain the solid polymer composite electrolyte thin film. According to the preparation method of the solid polymer composite electrolyte material, the ionic conductivity and Li < + > transference number of a solid polymer composite electrolyte thin film prepared by inducing polymer precursor polymerization through cations and compounding the inorganic filler at normal temperature are superior to those of a commercial PP film and a poly N, N-dimethylacrylamide film.

A photocurable resin composition for nails or artificial nails, contains the following components (A) to (D): a component (A): a urethane (meth)acrylate oligomer, a component (B): a monomer selected from the group consisting of a (meth)acrylate monomer, a (meth)acrylamide monomer, and (meth)acrylic acid (excluding the component (A)), a component (C): polyglycerol having no (meth)acryloyl group and / or a compound having a polyglyceryl ether skeleton having no (meth)acryloyl group, a component (D): a photoinitiator. A molecular weight of the component (C) is 200 or more.

The invention discloses a high-temperature-resistant and salt-resistant fracturing fluid and a preparation method thereof, and relates to the technical field of oil field fracturing fluids. When the high-temperature-resistant and salt-resistant fracturing fluid is prepared, sodium 3-chloro-2-hydroxypropane sulfonate, N, N-dimethylacrylamide and ethylene glycol react to prepare a quaternized solid product, and then the quaternized solid product reacts with 1-bromooctadecane to prepare an amphoteric hydrophobic monomer; guar gum powder reacts with 3-(1-naphthyloxy)-1, 2-epoxypropane to prepare naphthyloxy functionalized guar gum, and then the naphthyloxy functionalized guar gum, acrylamide and an amphoteric hydrophobic monomer are subjected to initiated polymerization through ceric ammonium nitrate to prepare modified guar gum; enabling zirconium oxychloride octahydrate, titanium chloride, lactic acid, ethanediamine and glycerol to react to prepare an organic zirconium cross-linking agent; and finally, mixing the modified guar gum, an organic zirconium cross-linking agent, sodium thiosulfate, sodium bromate, a surfactant and water to prepare the high-temperature-resistant and salt-resistant fracturing fluid. The high-temperature-resistant and salt-resistant fracturing fluid prepared by the invention has excellent high-temperature resistance and salt resistance.

The invention relates to the technical field of wastewater treatment, in particular to modified cation exchange resin, a preparation method and application of the modified cation exchange resin in shale gas wastewater treatment. The modified cation exchange resin is characterized in that the modified cation exchange resin is obtained by compounding cation exchange resin and sodium alginate and then grafting N, N-dimethylacrylamide, and the surface of the modified cation exchange resin has an amido group; wherein the cation exchange resin is weakly acidic cation exchange resin taking carboxylic acid groups as exchange groups. The modified cation exchange resin provided by the invention simultaneously contains carboxyl, hydroxyl and amido, can simultaneously adsorb organic pollutants and metal ions through various mechanisms (such as ion exchange, hydrogen-bond interaction, chelation, hydrophobic interaction and the like), and remarkably improves the treatment capacity and efficiency of the resin on complex wastewater. In addition, the dispersibility of the modified resin in water is improved due to the hydrophilicity of the modified resin, so that the modified resin shows higher stability and efficiency in the treatment process.

The invention discloses a filtrate reducer based on modified humic acid and a preparation method of the filtrate reducer, and relates to the technical field of oilfield chemistry. The preparation method of the filtrate reducer comprises the following steps: taking modified humic acid, N, N-dimethylacrylamide, N-vinyl imidazole, long-chain acrylate and hydroxyethyl acrylate, dissolving in a solvent, then adding an initiator, and reacting to obtain the filtrate reducer, wherein during preparation of the modified humic acid, firstly, the modified humic acid is activated by low-concentration potassium permanganate, and then the activated modified humic acid reacts with methyl chlorosilane. The filtrate reducer prepared by the preparation method disclosed by the invention has relatively good temperature-resistant and salt-resistant performance and relatively good filtrate reduction performance. The preparation method is simple, the raw materials are simple and easy to obtain, the cost is low, and popularization is easy.

The invention belongs to the technical field of batteries, and discloses a self-healing electrolyte for decoupling mechanical strength and conductivity and a preparation method thereof. The self-healing electrolyte with the mechanical strength and the conductivity decoupled comprises a polymer skeleton and solvent molecules used for transmitting lithium ions, the polymer skeleton is formed by copolymerizing two monomers, namely methacrylamide for providing a hydrogen bond donor and methyl methacrylate for providing a hydrogen bond acceptor according to a certain proportion in a free radical polymerization manner under the action of an initiator; the solvent molecule is fluorocyclopropionitrile capable of competing for lithium ions on a polymer chain. Before polymerization, a polymer monomer, an initiator and solvent molecules are mixed according to a certain proportion, lithium salt is added, and the solvent molecules are locked in a polymer skeleton in an in-situ polymerization mode. The gel electrolyte provided by the invention has the advantages of high conductivity, high mechanical strength and certain self-healing capability, and can be used for lithium ion batteries and lithium metal batteries.

The invention relates to a composition for use in a manufacture of paper, board or the like. The composition comprises a mixture of cationic starch having amylopectin content of at least 85%, and an amphoteric polymeric structure comprising structural units originating from non-ionic monomers, preferably (meth)acrylamide, anionic groups and cationic groups, the polymeric structure comprising cationic groups at least 0.2 mol-%.

The invention provides a copolymer oil-displacing agent containing a modified polyether amine macromonomer and a preparation method thereof, and belongs to the field of oilfield chemistry, the preparation method comprises the following steps: adding p-chlorobenzaldehyde and polyether monoamine which are equimolar into ethanol, stirring at room temperature, and carrying out Schiff base reaction to obtain an intermediate product solution; adding N-(3-dimethylaminopropyl) methacrylamide of which the mole is equal to that of p-chlorobenzaldehyde into the intermediate product solution, carrying out quaternization reaction, and carrying out rotary evaporation on ethanol to remove the ethanol, so as to obtain a modified polyether amine macromonomer; and polymerizing the modified polyether amine macromonomer and acrylamide, and crushing, hydrolyzing and drying a polymerization product to obtain the hydrophobic modified polyacrylamide containing the polyether amine structural unit. The oil-displacing agent has good temperature resistance and salt resistance, and can be used for preparing a polymer solution by taking seawater as a solvent.

The invention discloses bioactive gel for accelerating wound healing. The gel is prepared from the following raw materials in percentage by weight: 0.8%-1% of bomer 980, 5%-5.5% of glycerol, 15%-20% of white vaseline, 51.7%-55% of phosphate buffer, 1.8%-2% of nano royal jelly acid, 2%-3% of recombinant III type human collagen, 0.4%-0.5% of sodium hyaluronate, 1%-3% of sodium alginate, 20%-25% of polyethylene glycol-400, 1.5%-3% of dopamine-methacrylamide copolymer, 0.5%-0.8% of nano silver and 0.3%-0.5% of phenoxyethanol. The nano royal jelly acid and the nano silver have a synergistic antibacterial effect, so that the inhibition effect on drug-resistant bacteria such as MRSA and pseudomonas aeruginosa is remarkably improved, and meanwhile, the wound epithelization can be accelerated and scar formation can be reduced through the dual effects of the recombinant III type collagen and the acetylated sodium hyaluronate. The defects that a traditional dressing is narrow in antibacterial spectrum, single in repairing effect, poor in environmental adaptability and the like are overcome, and the dressing is particularly suitable for complicated wounds such as diabetic foot ulcer and second-degree burn.

The invention belongs to the field of oilfield chemistry, and relates to self-thickening polyacrylamide as well as a preparation method and application thereof. The preparation method of the self-thickening polyacrylamide comprises the following steps: dissolving acrylamide, 2-acrylamide-2-phenyl ethanesulfonic acid, hydroxyl-N-allylaniline, N-hydroxymethyl acrylamide and a cosolvent in deionized water, and adjusting the pH value to obtain a homopolymerization solution; cooling the homopolymerization solution, introducing nitrogen, adding an initiator, introducing nitrogen again, carrying out a polymerization reaction, and after the reaction is completed, carrying out heating and heat preservation, and carrying out an aging reaction, so as to obtain a polyacrylamide rubber block; and cutting, granulating, drying, crushing and screening the polyacrylamide gel block to obtain the self-thickening polyacrylamide. The self-thickening polyacrylamide disclosed by the invention contains hydroxyl-N-allylaniline and N-hydroxymethyl acrylamide monomers, gel is generated along with time extension under the oil reservoir condition, the profile control effect is improved, and the problems of phase separation and chromatographic effect caused by migration velocity difference of a conventional gel system are avoided.

The preparation method comprises the following steps: mixing acrylamide, acrylic acid, 2-methyl-2-acrylamido propanesulfonic acid, N, N-dimethylacrylamide, a modified additive, modified montmorillonite and deionized water, and polymerizing under the action of an initiator, so as to obtain the degradable fracturing fluid composite thickening agent. Compared with traditional guar gum, cyclodextrin molecules contained in the modified additive have better high-temperature-resistant effect and good anti-shearing effect, so that the thickening agent shows a stable chemical structure and good rheological property and sand-carrying capacity in the high-temperature use process, dissolution of a hydraulic fracturing fluid to a salt layer can be greatly relieved, and the thickening effect of the thickening agent is improved. Meanwhile, no residue is generated after gel breaking, damage to a reservoir stratum can be effectively reduced, the salt resistance of the thickening agent can be improved through the contained polypropylene glycol structure, the thickening agent can be suitable for the complex stratum environment, meanwhile, the organic part in the thickening agent can be degraded, and then the possibility of pollution to soil and water is reduced.

The invention discloses a biphenyl derivative photoinitiator, a preparation method of the biphenyl derivative photoinitiator, a photocuring thin film material and a preparation method and application of the photocuring thin film material. The biphenyl derivative has a structural formula shown as a formula (I), R1 is an electron donor group, and R2 is an electron acceptor group. According to the invention, biphenyl is taken as a main body structure, different donor groups R1 and acceptor groups R2 are connected, the photoinitiator is synthesized through Suzuki reaction, and a polymeric monomer material is N, N-dimethylacrylamide (DMA). The photocuring material with long afterglow luminescence can be obtained through an ultraviolet irradiation method, and under the irradiation of a 365nm ultraviolet lamp, an initiator absorbs photons to generate active species to attack double bonds in a monomer to initiate a polymerization reaction. The light-cured film can generate long afterglow luminescence as long as several seconds after being illuminated, and can be applied to the aspects of counterfeiting prevention, 3D printing, photoetching and the like.

The invention relates to the technical field of water pollution treatment, and particularly discloses a preparation method of phosphorus removal polymer gel, which comprises the following steps: reacting sodium alginate, modified ferroferric oxide-hydroxyapatite, N-(hydroxymethyl) acrylamide, acrylamide and a cross-linking agent to obtain the phosphorus removal polymer gel; the nano-hydroxyapatite and the nano-ferroferric oxide in the polymer gel have rich micropores, specific surface area and adsorption sites, the sodium alginate can form a three-dimensional network structure, provide supporting and fixing effects and increase the specific surface area and the adsorption sites of the material, and through the synergistic effect of adsorption and precipitation of the polymer gel, the specific surface area and the adsorption sites of the material are increased. The method has the advantages that phosphate can be efficiently removed, nano ferroferric oxide has superparamagnetism, rapid separation and effective recovery can be realized through a magnetic separation method, the recovery process is simplified, the recovery cost is reduced, secondary pollution is reduced, and the method is green and environment-friendly.