423 results about "Acrydite" patented technology

The invention discloses a wear-resistant and high-temperature-resistant synchronous belt and a preparation method thereof. The wear-resistant and high-temperature-resistant synchronous belt comprises a synchronous belt framework and a synchronous belt rubber sheet, the synchronous belt rubber sheet is prepared from the following raw materials: a fluorosilicone thermoplastic polyurethane elastomer containing a benzene ring structure, an amino-containing hyperbranched liquid crystal polymer, methyl vinyl phenyl silicone rubber, epoxidized natural rubber, molybdenum sulfide nanosheets, reinforced fibers, bis (1-vinyl imidazole-2-) ketone, 2-acrylamido-2-methylpropanesulfonic acid, 4, 4 '-difluoro-1, 3, 4-trimethyl-1, 3, 4-trimethyl-1, 3, 4-trimethyl-1, 3, 4-trimethyl-1, 3, 4-trimethyl-1, 3, 4-trimethyl-1, 3, 4-trimethyl-1, 3, 4-trimethyl-1 The high-temperature-resistant rubber is prepared from 2, 6-hydroxy-2-cyanobenzothiazole, bis (3-aminophenyl) 3, 5-bis (trifluoromethyl) phenylphosphine oxide, a catalyst, a coupling agent, a vulcanizing agent, an anti-aging agent, a scorch retarder and a lubricating agent. The synchronous belt is good in mechanical property, sufficient in high-temperature resistance and cold resistance, good in wear resistance and excellent in aging resistance and flame retardance.

The invention discloses a self-crosslinking temperature-resistant salt-resistant emulsion type fracturing fluid thickening agent and a preparation method thereof, and belongs to the technical field of oilfield chemistry. The raw materials adopted by the invention comprise 30 to 50 parts of an oily solvent, 15 to 25 parts of deionized water, 10 to 20 parts of acrylamide, 5 to 10 parts of acrylic acid, 2 to 4 parts of 2-acrylamido-2-methylpropanesulfonic acid, 0.05 to 0.2 part of a crosslinking monomer, 0.5 to 1 part of a quaternary ammonium salt type hydrophobic association monomer, 4 to 8 parts of an emulsifier and 1 to 2 parts of a phase inversion agent. The self-crosslinking emulsion is formed through water phase-oil phase mixing, high-speed emulsification, low-temperature initiation polymerization and phase inversion treatment. Based on physical-chemical double-crosslinking temperature control cooperation, a salt-resistant-hydrophobic double-shielding mechanism and an integrated design without an exogenous crosslinking agent, the contradiction between the temperature-resistant and salt-resistant performance of a traditional thickening agent and the process complexity is broken through, and a technical support is provided for efficient development of high-temperature and high-salt oil and gas reservoirs.

The invention discloses a high-concentration salt poly-zwitterionic gel electrolyte, a zinc ion battery and a preparation method. Belongs to the technical field of zinc ion batteries. The preparation method comprises the following steps: adding high-concentration zinc salt into a monomer mixed solution obtained by mixing an aqueous solution of an anionic monomer, an aqueous solution of a cationic monomer and an aqueous solution of an acrylamide monomer, and performing ultrasonic treatment to obtain a monomer-salt mixed solution; adding a free radical polymerization initiator, a cross-linking agent and a catalyst, and adjusting the pH value to 4.5-5.5 to obtain a pre-polymerization solution; and heating and polymerizing the pre-polymerized solution at 35-45 DEG C to obtain the high-concentration salt poly-zwitterionic gel electrolyte. The electrolyte provided by the invention can overcome the problem of liquid leakage, inhibit the growth of zinc dendrites and the occurrence of side reactions, solve the problem of reduction of ionic conductivity, and obtain a zinc ion battery with excellent conductivity and stability.

The invention discloses a functional fracturing fluid directly prepared from flow-back fluid of complex water quality. The fracturing fluid is prepared by directly adding a salt-tolerant polymer and an ion trapping agent into the flow-back fluid. The addition amount of the salt-tolerant polymer accounts for 0.15-0.3% of the total mass of the fracturing fluid, and the addition amount of the ion trapping agent is 100-500ppm. The salt-tolerant polymer is prepared by copolymerization of acrylamide, a salt-tolerant monomer and an allyl quinoline monomer, and the molecular weight of the polymer is 4-15 million. The salt-tolerant monomer is acrylamide polyoxyethylene sodium benzenesulfonate or acrylamide sodium sulfonate. The ion trapping agent is prepared from amino trimethylene phosphonic acid, diethylene triamine penta (methylene phosphonic acid), ethylene glycol bis (2-aminoethyl ether) tetraacetic acid, p-methylphenyl diethanol amine, 2, 3-epoxypropyl trimethyl ammonium chloride, fatty alcohol-polyoxyethylene ether, citric acid and tetrahydrofurfuryl acrylate. The fracturing fluid can be directly prepared from the flow-back fluid, the flow-back fluid does not need to be pretreated, and repeated utilization of the fracturing flow-back fluid is achieved.

The invention discloses an all-solid-state composite dry conductive agent and a preparation method thereof, and belongs to the technical field of batteries. The all-solid-state composite dry conductive agent is prepared by the following steps: uniformly mixing carbon nanotubes, high-dispersion carbon black and graphene to obtain a primary mixture; then preparing a uniformly dispersed glue solution from the composite dispersant and water; and then adding the primary mixture into the glue solution, uniformly mixing, sanding, homogenizing, drying and crushing to obtain the product, the high-dispersion carbon black is obtained by oxidizing carbon black to form active groups such as carboxyl and hydroxyl on the surface of the carbon black, halogenating acyl and then reacting with lithium 2, 5-diaminobenzene sulfonate. The preparation method comprises the following steps: grafting histidine ester into carboxymethyl cellulose by using propylene glycol diglycidyl ester as a cross-linking agent, then introducing allyl-1, 3-sultone, then copolymerizing with lithium 2-acrylamido-2-methylpropanesulfonate and 3-aminobenzoic acid allyl ester protected by fluorenylmethoxycarbonyl, and then deprotecting to obtain the composite dispersant.

The invention relates to the technical field of petroleum drilling fluids, in particular to a preparation method of an anti-calcium tackifier, a brine-based drilling fluid and a preparation method. The preparation method of the anti-calcium tackifier comprises the following steps: A, uniformly mixing the white oil and the emulsifier to form an oil phase for later use; b, dissolving 2-acrylamido-2-methyl-1-propanesulfonic acid, acrylonitrile, a cationic monomer and a vinyl monomer with carboxyl in pure water, adjusting the pH value to 7.0, and uniformly stirring to form a water phase; c, dropwise adding the water phase in the step B into the oil phase in the step A, and uniformly mixing to obtain a stable inverse emulsion; and D, in a nitrogen atmosphere, adding an initiator into the stable inverse emulsion in the step C, and reacting to obtain the anti-calcium tackifier. The brine-based drilling fluid disclosed by the invention can keep good rheological property and stability in a high-temperature environment of 180 DEG C.

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 provides a dry powder drag reducer for fracturing fluid and a preparation method of the dry powder drag reducer, and belongs to the technical field of fracturing materials for well drilling, and the preparation method comprises the following steps: dissolving 4-bromobutyryl chloride and N-dodecyl methylamine in acetonitrile, heating and stirring for reaction, adding polyethylene glycol monomethyl ether acrylate and dichloromethane, stirring and purifying in a nitrogen atmosphere to obtain a dry powder drag reducer; a double-tailed hydrophobic monomer is obtained; uniformly mixing the core-shell SiO2 / Fe3O4 composite nanoparticles, an ethanol water solution, KH570 and an ammonia solution, stirring, and purifying to obtain modified SiO2 / Fe3O4; the preparation method comprises the following steps: adding acrylamide, acrylic acid, sodium 2-acrylamido-2-methylpropanesulfonate, a double-tailed hydrophobic monomer and modified SiO2 / Fe3O4 into water, uniformly mixing, adjusting the pH value, introducing nitrogen, mixing and stirring, adding an azo initiator, stirring, cooling, purifying, carrying out vacuum drying, and crushing into powder, thereby obtaining the dry powder drag reducer for the fracturing fluid. The drag reducer has certain heat resistance while achieving good drag reduction performance, and can be better applied to fracturing operation in the well drilling process.

The invention relates to a self-repairing ionic gel electrolyte, a zinc ion battery and a preparation method and application of the self-repairing ionic gel electrolyte and the zinc ion battery. The ionic gel electrolyte comprises a polymer network, ionic liquid (1-ethyl-3-methylimidazolium tetrafluoroborate) and movable zinc ions, the polymer network is obtained through a reaction of an anionic monomer 2-acrylamido-2-methyl sodium propanesulfonate and a cationic monomer acryloyloxyethyl trimethyl ammonium chloride, and the movable zinc ions are provided by a zinc tetrafluoroborate hydrate. The zinc ion battery takes the ionic gel as an electrolyte, and a positive film electrode and a negative film electrode are arranged on two sides of the ionic gel. Compared with the prior art, the material not only has excellent mechanical properties and efficient ion transmission capability, but also has the capability of quickly repairing mechanical damage, and the completely broken material can be completely repaired after being contacted for 10 seconds under infrared light irradiation. The prepared zinc ion battery has excellent self-repairing performance, flexible performance and electrochemical performance.

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 perovskite solar cell based on buried interface modification and a preparation method and application thereof. The invention relates to an application of 2-(acrylamide) benzoic acid and / or 2-(4-pentenoylamido) benzoic acid in a trans-perovskite solar cell buried interface modifier. According to the invention, 2-(acrylamide) benzoic acid and / or 2-(4-pentenylamido) benzoic acid are / is used as a buried interface modifier, such molecules take benzoic acid as an anchoring group, and through the synergistic effect among carboxyl, amido and carbon-carbon double bonds, the defects at the thin film grain boundary of the hole transport layer and the perovskite layer are reduced; according to the invention, the NiOX thin film is introduced into the small molecules, and the alkyl chain is further introduced into the small molecules and can effectively fill small recesses and holes in the NiOX thin film, so that the flatness of the NiOX thin film is improved, a compact and compact modification layer is formed, the morphology of the perovskite layer thin film is further regulated and controlled, and the photoelectric conversion efficiency of the perovskite solar cell is improved.

The invention relates to the field of oil exploitation, in particular to temperature-resistant and salt-resistant efficient gel as well as a preparation method and application thereof, which are used for solving the problems that the efficiency of the gel is influenced and the oil displacement effect is reduced due to poor high temperature resistance and salt resistance and easiness in failure of the existing polyacrylamide hydrogel. According to the preparation method, through a copolymerization technology, various monomers with excellent temperature resistance and salt resistance, such as acrylamide, methacryloyloxyethyl trimethyl ammonium chloride, 2-acrylamido-2-methylpropanesulfonic acid, a temperature-resistant monomer and a hydrophobic macromonomer, are integrated, so that the gel can bear a relatively high temperature without degradation or performance reduction; the prepared oil displacement gel has good stability in a high-salinity environment, does not lose an oil displacement effect due to the existence of salt, ensures the activity and stability of the gel in a high-temperature and high-salt-content oil reservoir environment, and obviously enhances the oil displacement efficiency of the gel in crude oil exploitation, thereby greatly improving the exploitation efficiency and recovery rate of crude oil.

The invention aims to provide an inhibitor for reverse flotation of micro-fine-particle hematite and a use method of the inhibitor, aiming at the problem that the micro-fine-particle hematite cannot be effectively inhibited by an existing iron ore reverse flotation process technology. According to the inhibitor, AMPS (2-acrylamido-2-methylpropanesulfonic acid) is subjected to chemical modification in a weakly alkaline solution, a product AMPS (OH <->) is generated, then in hematite flotation operation, the hydrophilicity of micro-fine particle hematite is improved, the flotation performance difference of hematite and silicate minerals is effectively increased, and efficient removal of the silicate minerals is facilitated. In addition, the modified inhibitor AMPS (OH <->) has the characteristics of strong selectivity, small dosage, simple preparation and the like, and can effectively reduce the content of silicon in the flotation concentrate of the micro-fine particle hematite, improve the yield and the recovery rate of the flotation concentrate and realize the target of efficient impurity removal of the micro-fine particle disseminated hematite.

The invention provides a hyperbranched polyamido monomer, a copolymer filtrate reducer and a preparation method, the hyperbranched polyamido monomer takes acrylamide as a basic monomer, through catalysis of a UIO-66 type MOF catalyst, a branched side chain R is connected to a terminal amido of an amide group of the acrylamide, the branched side chain R is a nitrogen heterocyclic ring, and the hyperbranched polyamido monomer is a hyperbranched polyamido monomer. The preparation method comprises the following steps: mixing a hyperbranched multi-amino monomer, acrylamide, acrylic acid and 2-acrylamido-2-methylpropanesulfonic acid with water to obtain a mixed solution, and carrying out free radical aqueous solution polymerization in the mixed solution to obtain the copolymer filtrate reducer. The molecules of the filtrate reducer can form a supramolecular association body by virtue of the synergistic effect of hydrogen bonds formed between high-density amino groups and other polar groups in the structure of the filtrate reducer, so that the filtrate reduction performance of the filtrate reducer in a high-temperature and high-salt calcium environment can be ensured.

The present invention relates to the field of ceramic technology, and more specifically, to an alumina ceramic fiber board with a fireproof and heat-insulating function and a nano-ceramic coating, which sequentially includes a nano-ceramic coating and an alumina ceramic fiber board from top to bottom; for the nano-ceramic coating, calculated by mass, the raw materials include: 50-70 parts of an adhesive, 10-20 parts of hydroxylated layered Ti3C2 / silica hollow spheres / ceramic particles, 0.1-0.5 parts of 2-acrylamido-2-methylpropanesulfonic acid sodium salt, 0.01-0.1 parts of an initiator, and 10-20 parts of water; the present invention solves the problem that the ceramic fiber board in the prior art cannot meet the fireproof and heat-insulating properties required for ceramic fiber boards in the construction field, and at the same time has excellent adhesion, corrosion resistance, strength, antibacterial property, and hydrophobic and oleophobic properties.

The invention discloses a pH-responsive low-temperature gel temporary plugging agent and a preparation method thereof, and belongs to the technical field of oil-gas field development. The pH response type low-temperature gel temporary plugging agent is prepared from the following substances in parts by weight: 2.8 to 5.7 parts of acrylamide, 1.4 to 2.6 parts of 2-acrylamido-2-methylpropanesulfonic acid, 0.05 to 1.04 parts of a cross-linking agent, 0.01 to 0.1 part of an initiator, 2 to 3.33 parts of amylopectin, 1 to 1.67 parts of sodium alginate, 0.27 to 0.35 part of acetic acid, 2.14 to 2.61 parts of sodium acetate, 0.9 to 1.5 parts of glycerol and the balance of water, and the sum of the parts by weight of the components is 100. The cross-linking agent is obtained by synthesizing dihydrazide and diacetone acrylamide. The gel temporary plugging agent is easy and convenient to prepare, raw materials are cheap and easy to obtain, and the production process is controllable. The fracturing fluid is applied to a temporary plugging diversion fracturing process of a low-temperature tight oil reservoir, and has important significance on efficient development of oil and gas fields.

The invention relates to the field of polyacrylamide, in particular to functional polyacrylamide and a preparation method thereof.The functional polyacrylamide is prepared by copolymerization of an acrylamide monomer, an acryloylamino crown ether derivative, a nonionic monomer, an anionic monomer and / or a cationic monomer, an acrylamide structure and a crown ether structure are combined together to synthesize a crown ether monomer with a polymerizable acrylamide group, and the monomer is introduced into a polyacrylamide molecular chain to form a copolymerization product, so that during sewage treatment, heavy metal ions in water are effectively removed while suspended particles are aggregated as a flocculating agent, and the water quality is improved. The heavy metal content after treatment is reduced, and the water treatment agent with multiple effects is formed.

This invention relates to N-(3-(6-Amino-5-(2-(N-methylacrylamido)ethoxy)pyrimidin-4-yl)-5-fluoro-2-methylphenyl)-4-cyclopropyl-2-fluorobenzamide drug substance substantially free of a nitrosamine impurity, e.g. the nitrosamine impurity N-(3-(6-amino-5-(2(methyl)(nitroso)amino)ethoxy)pyrimidin-4-yl)-5-fluoro-2-methylphenyl)-4-cyclopropyl-2-fluorobenzamide and novel processes of preparation thereof. The invention further relates to pharmaceutical composition comprising N-(3-(6-Amino-5-(2-(N- methylacrylamido)ethoxy)pyrimidin-4-yl)-5-fluoro-2-methylphenyl)-4-cyclopropyl-2-fluorobenzamide, wherein the composition is substantially free of a nitrosamine impurity, e.g. the nitrosamine impurity N-(3-(6-amino-5-(2(methyl)(nitroso)amino)ethoxy)pyrimidin-4-yl)-5-fluoro-2-methylphenyl)-4-cyclopropyl-2-fluorobenzamide. Pharmaceutical products containing said drug substance and compositions are also disclosed, as well as methods for preparing said drug substance, pharmaceutical compositions and products.

The invention provides a composite oil-displacing agent for heavy oil cold production and a preparation method thereof, and belongs to the technical field of oilfield chemistry. The composite oil displacement agent is prepared from the following components in parts by weight: 42 to 48 parts of acrylamide, 12 to 14 parts of acrylic acid, 16 to 18 parts of N, N-dimethylformamide, 9 to 10 parts of 2-acrylamido-2-methylpropanesulfonic acid, 10 to 12 parts of allyl 2-ethylbutyrate, 0.5 to 1 part of 2, 2-dimethylolbutanol, 6 to 7 parts of an interfacial tension regulator, 9 to 10 parts of a penetration enhancer, 0.35 to 0.45 part of a slow release initiator, 1 to 2 parts of a stabilizer and 180 to 200 parts of deionized water. A polymerization product obtained by adopting the components can remarkably improve the stability and viscosity of the composite oil-displacing agent, more effectively carry out heavy oil, improve the adsorption capacity of a surfactant on an oil-water interface, reduce the tension of the oil-water interface and improve the recovery ratio.

The invention provides a continuous production method of 2-acrylamido-2-methylpropanesulfonic acid and application of the 2-acrylamido-2-methylpropanesulfonic acid. The continuous production method comprises the following steps: S1, adding part of acrylonitrile into a reaction kettle in advance; s2, continuously adding the residual acrylonitrile into the mixing kettle, adding a pre-prepared fuming sulfuric acid solution, mixing, and controlling the mixing temperature at-10-10 DEG C to obtain a first mixed solution; s3, continuously adding the first mixed solution obtained in the step S2 into a supergravity reactor, gasifying isobutene at a constant speed, and introducing the gasified isobutene into the supergravity reactor for reaction to obtain a second mixed solution containing 2-acrylamido-2-methylpropanesulfonic acid; and S4, adding a second mixed solution containing 2-acrylamido-2-methylpropanesulfonic acid into the reaction kettle, continuously reacting, and after the reaction is finished, filtering and drying to obtain the 2-acrylamido-2-methylpropanesulfonic acid. The 2-acrylamido-2-methylpropanesulfonic acid prepared by adopting the production method is high in purity and high in product synthesis efficiency, and meanwhile, rectifying still residues generated in the reaction process are relatively low.

The present invention discloses a preparation method and application of a single-ion conductor composite binder. The binder is prepared by compounding and modifying a copolymer of butyl acrylate and lithium 2-acrylamido-2-methylpropanesulfonate with polyisobutylene. Its main features are as follows: First, the binder can be completely dissolved in the non-polar solvent toluene, solving the problem of incompatibility between traditional binders and sulfide electrolytes; Second, the unique molecular structure design endows it with excellent adhesion performance and ion conduction ability at the same time, which can significantly reduce the interfacial impedance. The flexible chain segment of butyl acrylate provides elastic support, and the sulfonic acid groups of lithium 2-acrylamido-2-methylpropanesulfonate form strong chemical bonds with the surface of sulfide particles, enhancing the binding force with the electrolyte. The preparation process of the binder of the present invention is simple, the cost is controllable, and it is suitable for large-scale production, providing an important material solution for promoting the industrialization of sulfide all-solid-state batteries.

The invention relates to a method for recycling high-purity graphite from a negative electrode of a waste lithium battery by using a fine washing agent. The method comprises the following steps: preliminarily disassembling the waste lithium battery negative electrode to separate out a negative electrode plate; crushing and screening the negative plate by adopting a machine crusher, and collecting screened fine powder; carrying out heat treatment to remove the binder and other organic matters; stirring and soaking the graphite powder subjected to heat treatment, inorganic acid, sodium carbonate and a fine washing agent; filtering, washing a filter cake with deionized water, and drying to obtain high-purity graphite; the fine cleaning agent is prepared by the following steps: continuously irradiating acrylamide-beta-cyclodextrin, tetramercapto porphyrin, 1-butylene-2, 3, 4-tricarboxylic acid, dimethyl sulfoxide and a photoinitiator at room temperature for 30-80 minutes by keeping ultraviolet light of 365 nm and 10 mW / cm < 2 >, and distilling to remove dimethyl sulfoxide. The fixed carbon content of the recovered graphite can reach 99.98%.

The invention relates to the technical field of organic synthesis, in particular to acrylamido triazine and a preparation method and application thereof.The preparation method comprises the steps that 126 g of melamine is weighed and placed in a three-opening round-bottom flask, 600 g of water and 2-10 g of polymerization inhibitor are added and stirred to be uniform, 60-260 g of acrylic acid is dropwise added, the mixture is heated to 100-140 DEG C, the reaction time is 6-10 h, and a reaction solution is obtained; and filtering the reaction liquid while the reaction liquid is hot, washing a filter cake with water, acetone and ethanol respectively, and drying to obtain the acrylamido triazine. The prepared 1-acrylamide triazine can be used for free radical polymerization reaction to prepare linear formaldehyde-free polymer resin with a triazine ring as a unit structure; the prepared 1, 3-diacrylamido triazine and 1, 3, 5-triacrylamido triazine can perform or participate in free radical polymerization reaction between other unsaturated double bonds to prepare a polymer with a cross-linked structure, and a technical route for preparing an aldehyde-free high-molecular polymer based on melamine is broken through in an application technical method.

The invention provides a multifunctional plugging agent for oil wells with medium and high water content and a preparation method of the multifunctional plugging agent. The plugging agent is prepared from the following substances in percentage by weight: 1-10% of high-strength nano gel particles, 2-5% of nano silicon dioxide dispersion liquid, 1-5% of PPG chitosan pre-crosslinking particles, 1-5% of guanidine gum dry powder, 1-2% of active calcium magnesium aluminum silicate, 0.5-1% of active silica gel, 0.5-1% of sodium sulfonate, 0.1-1% of a crosslinking regulator and the balance of water. Chitosan and cellulose nanocrystals are compounded for use, so that the strength of PPG chitosan pre-crosslinked particles is greatly improved. Chitosan reacts with an acrylamide monomer, 2-acrylamido-2-methylpropanesulfonic acid and a cross-linking agent methylene bisacrylamide to generate a double-network polymer product, so that the gel strength is greatly improved, and higher pressure bearing capacity, plugging capacity, scouring resistance and the like are achieved. Through the synergistic effect of all the components, the plugging water control effect is improved, water is plugged, oil is not plugged, and the plugging agent has important significance on plugging water control in the extra-high water cut period and improvement of oil well productivity.

The invention relates to the field of dry strength agents, and discloses a nano-cellulose modified novel reinforced dry strength agent, which is prepared from the following raw materials in parts by weight: 10 to 20 parts of nano-cellulose, 30 to 50 parts of acrylamide, 10 to 20 parts of methacryloyloxyethyl trimethyl ammonium chloride, 5 to 15 parts of dimethylaminoethyl methacrylate, 3 to 8 parts of itaconic acid, 3 to 8 parts of sodium methallyl sulfonate, 3 to 8 parts of N, N-dimethylformamide, 3 to 8 parts of sodium dodecyl benzene sulfonate, 3 to 8 parts of sodium dodecyl benzene sulfonate, 3 to 8 parts of sodium dodecyl benzene sulfonate, 3 to 8 parts of sodium dodecyl benzene sulfonate, 3 to 8 parts of sodium dodecyl benzene sulfonate and 5 to 10 parts of sodium dodecyl benzene sulfonate. 5 to 15 parts of N, N-dimethylacrylamide, and 5 to 15 parts of 2-acrylamido-2-methylpropanesulfonic acid. Nano cellulose is used as a core reinforcing component, by means of the nanoscale size and high reaction activity, a surface group and fibers form a hydrogen bond and are chemically bonded with a polymeric monomer, a three-dimensional network structure is constructed among the fibers, and electrostatic adsorption of a cationic monomer and the crosslinking effect of a polar group are cooperated, so that the binding force among the fibers of the paper is improved; and the tensile property is obviously enhanced.

The invention provides a high-barrier nanocellulose-based composite liquid mulching film and a preparation method thereof.The preparation method comprises the steps that sodium periodate is added into a sodium alginate solution for an oxidation reaction, an oxidized sodium alginate solution is obtained, a chitosan solution is added into the oxidized sodium alginate solution, and a composite solution is obtained after uniform mixing; mixing the nanocellulose solution with the composite solution, dropwise adding an ammonia water solution to adjust the pH value, and carrying out a cross-linking reaction to obtain a matrix solution; the preparation method comprises the following steps: dissolving 2-acrylamido-2-methylpropanesulfonic acid and methacryloyloxyethyl trimethyl ammonium chloride in deionized water to obtain a precursor solution, and adding an initiator into the precursor solution for copolymerization to obtain a zwitterionic polymer; adding a zwitterionic polymer into the Na-montmorillonite dispersion liquid for intercalation reaction to obtain modified montmorillonite; and uniformly mixing the matrix solution, the modified montmorillonite, the plasticizer, the rheology modifier and the surfactant, and then carrying out standing curing and vacuum defoaming.

The invention provides a natural polymer shear strength improving agent for temperature-resistant tackifying water-based drilling fluid as well as a preparation method and application of the natural polymer shear strength improving agent. The shear strength improving agent is prepared from the following raw materials in parts by mass: 1 to 7 parts of carboxymethyl starch, 1 to 5 parts of 2-acrylamido-2-methylpropanesulfonic acid, 1 to 5 parts of dimethyl diallyl ammonium chloride, 1 to 5 parts of N-vinyl pyrrolidone, 1 to 5 parts of acrylamide, 0.01 to 0.05 part of an initiator I, 0.01 to 0.05 part of an initiator II, 0.01 to 0.07 part of a cross-linking agent epoxy chloropropane, 50 to 70 parts of water and 150 to 220 parts of absolute ethyl alcohol. According to the shear strength improving agent, natural high polymer materials are used, a polymer net structure is formed through polymerization reaction, the cross-linking agent is used for promoting the net structure to be tighter for tackifying, and the shear strength improving agent has better thermal stability, dynamic shear force, flocculation capacity and suspension stability while the cost and the environmental load are reduced.

The invention discloses a reinforced flame-retardant PC composite material and a preparation method thereof, and relates to the technical field of composite materials. Comprising the following raw materials in parts by weight: 80 parts of PC resin, 10-20 parts of hydroxyl-terminated hyperbranched polycarbonate, 5-8 parts of a micro-crosslinking agent, 3-5 parts of a coupling agent, 25-35 parts of a filler, 5-8 parts of hyperbranched tripolyphosphazene terpyridyl CTP-TPY, 2-4 parts of a compatilizer, 0.3-0.6 part of an antioxidant, 0.3-0.6 part of a lubricant, 0.8-1.2 parts of an initiator and 1-3 parts of 9, 10-di-tert-butyl-4-methylphenol. The invention relates to a high-temperature-resistant anti-corrosion coating which is prepared from the following components in parts by weight: 2-6 parts of 2-acrylamido-2-methylpropanesulfonic acid, 2-4 parts of 1, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, 1-3 parts of octaphenylcyclotetrasiloxane, 4-6 parts of 2-acrylamido-2-methylpropanesulfonic acid and 0.8-1.2 parts of a catalyst. The reinforced flame-retardant PC composite material is good in mechanical property and excellent in flame retardance, impact toughness and weather resistance.

The invention provides self-adjustable skin bionic hydrogel, a preparation method and application, and belongs to the technical field of biomedical materials, methyl acrylate (MA), 3-acrylamido phenylboronic acid (AAPBA) and the like are used as raw materials to prepare organogel, polyphenol drugs and antibiotics are encapsulated, double-drug-loading organogel is prepared, and the hydrogel is used for preparing the skin bionic hydrogel. The preparation method comprises the following steps: firstly, preparing a hydrogel (QL-MAB) by replacing an organic solvent with water as a medium, carrying out rapid phase separation on an MA hydrophobic fragment to form a compact outer layer similar to'epidermis', combining an AAPBA fragment with quercetin through a borate bond to construct a glucose-responsive'pore '-similar active site, and finally constructing a skin bionic hydrogel system which simulates a skin structure and can realize intelligent drug delivery. The skin bionic hydrogel provided by the invention can realize on-demand release of drugs, and can effectively promote the repair of wound surfaces infected by diabetes mellitus.

The invention relates to the technical field of oil-gas field development, in particular to a salt-tolerant associated emulsion type fracturing fluid thickener as well as a preparation method and application thereof, and the salt-tolerant associated emulsion type fracturing fluid thickener is prepared by polymerizing a water-phase mixed solution and an oil-phase mixed solution; wherein the water-phase mixed solution is prepared by mixing the following components in parts by weight: 10 to 15 parts of acrylamide, 8 to 12 parts of 2-acrylamido-2-methylpropanesulfonic acid, 6 to 10 parts of methacryloyloxyethyl (4-sulfo) benzyl dimethyl ammonium chloride, 4 to 8 parts of 2-acrylic acid-2-(2-hexadecyl piperazine) ethyl ester and 50 parts of water; the oil-phase mixed solution is prepared by mixing 4-6 parts by weight of an emulsifier and 30-50 parts by weight of white oil; the preparation method comprises the following steps: uniformly mixing an oil-phase mixed solution and a water-phase mixed solution, and reacting at 45-70 DEG C for 2-4 hours under the initiation of azodiisobutyronitrile, the salt-tolerant association emulsion type fracturing fluid thickener can realize hydrophobic association tackifying in water, has the functions of salt tolerance, resistance reduction, sand carrying and the like, is low in residue, small in damage and good in temperature resistance and shear resistance, and meets the construction requirements.