19 results about "Sodium methacrylate" patented technology

The invention belongs to the technical field of flocculants, and particularly provides a wastewater treatment flocculant and a preparation method thereof.The preparation method of the wastewater treatment flocculant comprises the following steps that 1, guar gum and isopropyl acrylamide react to prepare a precursor A; guar gum reacts with sodium methacrylate to prepare a precursor material B; and 2) uniformly mixing deionized water, the precursor material A, the precursor material B and a glucan derivative polymer, then adding a monomer and an initiator, and carrying out a photo-initiation reaction, purification and drying to obtain the flocculant. The prepared flocculant has the advantages of good flocculation effect and applicability to a complex sewage system.

The invention belongs to the technical field of adsorption, and relates to a hydrogel adsorption material based on microbial activated coal gangue loaded with rare earth elements as well as a preparation method and application of the hydrogel adsorption material. The method comprises the following steps: grinding and calcining a coal gangue raw material to obtain calcined coal gangue; mixing the calcined coal gangue with a mixed microbial agent, adjusting the pH value, standing and culturing to obtain microbial activated coal gangue; immersing the microbial activated coal gangue into a rare earth element salt solution, and magnetically stirring to obtain rare earth element loaded modified coal gangue; dissolving sodium methacrylate sulfonate and 2-acrylamido-2-methylpropanesulfonic acid in deionized water, adding a cross-linking agent, an initiator, a rare earth element salt solution and the modified coal gangue, fully reacting until the system is viscous, and freeze-drying to obtain the microbial activated coal gangue loaded rare earth element hydrogel adsorption material. The problems that the potential activity of the coal gangue is not fully utilized, and a traditional hydrogel adsorption material is poor in selectivity, high in cost and the like are solved.

The invention relates to the technical field of high polymer materials, and discloses a preparation method of sodium acrylate and derivatives thereof and PEGDA (polyethylene glycol diacrylate) copolymerized hydrogel, which comprises the following steps: S1, carrying out deep deoxidization pretreatment on raw materials containing sodium methacrylate monomers, a polyethylene glycol diacrylate cross-linking agent and water, and preparing under the protection of inert gas to obtain a prepolymerized solution; s2, carrying out polymerization reaction by adopting a programmed thermal management process to obtain a gel prepolymer; s3, carrying out hot press molding treatment on the gel prepolymer to obtain cured hydrogel; and S4, carrying out multi-stage deep purification treatment on the cured hydrogel. According to the method disclosed by the invention, the three technical problems of oxygen inhibition, thermal runaway and toxic residue of products in free radical polymerization are effectively solved by systematically controlling a reaction source, a process and a product. The prepared hydrogel is high in batch-to-batch reproducibility, uniform in network structure and suitable for industrial large-scale production, and the biocompatibility reaches the medical implantation level standard.

This invention relates to the field of micro / nano manufacturing technology, and in particular to a high-refractive-index fluidized nanoparticle, a hybrid photoresist, a patterned coating, and methods for preparing the respective. The high-refractive-index fluidized nanoparticle comprises a core, the core being modified with a first ligand and a second ligand; the first ligand is one or more selected from methacrylic acid, 4-pentenoic acid, methacryloxypropyltrimethoxysilane, and sodium methacrylate sulfonate; the second ligand is one or more selected from piperidine, N,N-diisopropylethylamine, 1,5,7-triazabicyclo[4.4.0]decene-5-ene, tetramethylguanidine, triethylamine, and tetrahydropyrrole. This invention, through the design of ultra-small metal oxide nanoparticles and innovative organic ligands, successfully solves the technical contradiction of traditional photoresist materials in achieving high resolution, high refractive index, and low curing shrinkage.

The present application belongs to the technical field of lithium battery, and particularly relates to a water-based HTPB binder for lithium battery positive electrode and a preparation method thereof. The present application provides a high-molecular polymer composite water-based binder with a core-shell structure based on HTPB water-based technology, which is mainly prepared by acrylation of HTPB with isocyanate propyl, and then emulsion polymerization with sodium methacrylate solution, acrylonitrile, acrylamide and acrylate monomer. The product has no VOC residue, and is an environmentally friendly, non-toxic and pure green water-based binder. Compared with the existing water-based positive electrode binder, the water-based HTPB binder provided by the present application has a toughness increased by more than 2 times, and the peeling force is also increased by more than 1 time. The battery prepared by the water-based HTPB binder provided by the present application has a capacity retention rate of more than 80% after 6000 cycles.

This invention discloses a polymeric sealing material for PU valves and its preparation method, belonging to the field of synthetic polymeric sealing materials. The polymeric sealing material for PU valves of this invention, by mass parts, comprises the following raw material components: 100 parts of rubber compound, 2.5-3.5 parts of vulcanizing agent, 1-2 parts of crosslinking agent, 5-20 parts of plasticizer, 10-30 parts of carbon black, 0-1 part of stearic acid, 60-80 parts of hydrophilic polyurethane resin, 130-150 parts of hydrophilic monomer, and 10-20 parts of modified montmorillonite; wherein, the rubber compound... The hydrophilic polyurethane resin obtained by mixing nitrile rubber and chloroprene rubber is obtained from a hydroxyethyl methacrylate-terminated polyether-type PU prepolymer; the crosslinking agent is obtained by reacting 4,4'-diaminodiphenylamine with 3,4-epoxycyclohexylmethyl methacrylate; the hydrophilic monomer includes sodium methacrylate; the modified montmorillonite is obtained by modifying montmorillonite with methacryloyloxyethyltrimethylammonium chloride; the polymer sealing material for PU valves of the present invention has low moisture permeability, good long-term sealing effect, good mechanical properties, and good weather resistance.

The application relates to a preparation method and application of a hydrophilic / subaqueous oleophobic chitosan nanofiber membrane. The application belongs to the oil-water separation technical field. The method comprises the following steps: S1, preparing a chitosan solution and a polyvinyl alcohol solution; S2, preparing a modified solution; S3, electrospinning the modified solution prepared in the step S2 to obtain a hydrophilic modified nanofiber membrane; and S4, hot-pressing the prepared hydrophilic modified nanofiber membrane to obtain the hydrophilic / subaqueous oleophobic chitosan nanofiber membrane. The sodium methacrylate is used for modification in the application, can play a demulsification role in the oil-water separation process, and can increase the oil removal rate. The prepared chitosan nanofiber membrane has a hydrophilic structure and rich pore diameters, exhibits excellent stability, has relatively high permeability, low long-term operation permeability attenuation, and a long cleaning cycle. The hydrophilic / subaqueous oleophobic chitosan nanofiber membrane is applied to oil-water separation.

This invention relates to the technical field of concrete and its additives, and provides a polycarboxylate superplasticizer, concrete containing the superplasticizer, and a preparation method thereof. The polycarboxylate superplasticizer of this invention uses acrylic acid and sodium methacrylate as small monomers, and is linked by C=C double bonds and -COO bonds. ‑ The triazine derivatives of the two-arm polyoxyethylene ether chains are macromonomers. Compared with conventional polycarboxylate superplasticizers, the polycarboxylate superplasticizer of this invention can both improve the anchoring effect of anions on the surface of cement particles and increase the steric hindrance effect that hinders the flocculation of cement particles. Therefore, it can significantly improve the dispersion ability of cement particles, improve the fluidity of cement paste, and hinder the flocculation of cement particles, thereby reducing the slump loss of concrete.

This invention discloses a smart nano-chemical oil displacement agent containing smart microspheres. The smart microspheres comprise: a core formed by nano-SiO2 and dodecyl phosphate monoester clusters; polyacrylamide and Fe3O4 nanoparticles sequentially attached to the surface of the core; and a shell formed by crosslinking poly(N-isopropylacrylamide) and sodium methacrylate. This invention also discloses its preparation and application. The preparation method of this invention is simple, and in the oil displacement process, the smart nano-chemical oil displacement agent of this invention achieves a controllable oil displacement process.

This invention discloses a pH-responsive magnetic nano-chemical oil displacement agent containing intelligent microspheres. The intelligent microspheres comprise a core formed by nano-SiO2 and dodecyl phosphate monoester clusters, with polyacrylamide and Fe3O4 nanoparticles sequentially attached to the surface of the core, and a shell formed by cross-linking sodium methacrylate. This invention also discloses its preparation and application. The oil displacement agent provided by this invention has mild preparation conditions, low cost, and good oil displacement effect, making it suitable for large-scale production. It can reduce energy consumption during the extraction process, reduce emissions and pollution, and improve crude oil recovery, thus having significant practical implications.

The invention belongs to the technical field of metal wire processing aids, and particularly relates to high-water-solubility steel wire drawing lubricating powder which comprises 45-60 parts of stearate, 2-5 parts of an extreme pressure agent, 1-2 parts of an antirust agent, 2-5 parts of a lubricating aid, 1-2 parts of a water absorbent and 10-20 parts of sodium polyacrylate expandable microcapsules. Wherein the sodium polyacrylate expandable microcapsule is a microcapsule which takes cross-linked sodium polyacrylate and / or cross-linked sodium polymethacrylate as a shell and takes a low-boiling-point organic matter as a core. The interior of the microcapsule in the lubricating film layer on the surface of the drawn steel wire is gasified and expanded to loosen the lubricating film layer, so that the lubricating film layer is more easily cleaned and flushed away from the surface of the steel wire, and adhesion and retention of lubricating powder components on the surface of the steel wire after cleaning are effectively reduced.

This invention relates to an organic hydrotalcite / polycarboxylate composite paste for vat dye printing on acrylic / viscose blended fabrics, its preparation method, and its application. The paste is prepared by the following method: First, an aqueous solution of polycarboxylate is prepared using acrylic acid, sodium methacrylate, methoxy polyethylene glycol methacrylate, and 2-acrylamide-2-methylpropanesulfonic acid as raw materials; second, hydrotalcite is prepared by reacting magnesium nitrate, calcium nitrate, and aluminum nitrate; then, the hydrotalcite is reacted with sodium dodecyl sulfonate to prepare an organic hydrotalcite; finally, the aqueous solution of polycarboxylate is reacted with the organic hydrotalcite to obtain the organic hydrotalcite / polycarboxylate composite paste. The organic hydrotalcite / polycarboxylate composite paste prepared by this invention is used for vat dye printing on acrylic / viscose blended fabrics. The resulting printed fabric exhibits characteristics such as a desizing rate higher than 92%, good softness, high outline clarity, penetration rate higher than 82%, and high fastness to dry rubbing and washing, showing great application potential.

The invention discloses a preparation method of a methacrylic resin monomer containing a lactone structure, which comprises the following steps: by taking alpha-bromo-gamma-butyrolactone and sodium methacrylate as raw materials and N, N-dimethylformamide as a solvent, reacting at 80-95 DEG C, and carrying out primary filtration and filtrate concentration, concentrated solution redissolution and secondary filtration, secondary filtrate washing, liquid separation, drying and tertiary filtration to obtain the methacrylic resin monomer containing the lactone structure. The preparation method comprises the following steps: preparing a 2-carbonyl-tetrahydrofuran-3-hydroxyl-methacrylate crude product from alpha-bromo-gamma-butyrolactone and sodium methacrylate according to a molar ratio of 1: (1.3-1.5), and rectifying the crude product to obtain a 2-carbonyl-tetrahydrofuran-3-hydroxyl-methacrylate product; according to the synthetic route, the used raw materials are all products commonly used in the field of chemical engineering and are low in price, high-toxicity substances such as a polymerization inhibitor are not needed in the preparation process, and the cost of the raw materials is greatly reduced; the synthesis process route is shorter, the operation is simple, purification of an intermediate is not needed, the production process is simplified, and the product yield is also improved.

The invention discloses a low-shrinkage protective film and a preparation method thereof, and relates to the technical field of film materials. The low-shrinkage protective film comprises a surface functional layer, a PET (polyethylene terephthalate) base material layer, a pressure-sensitive adhesive layer and a release layer which are sequentially arranged, and the PET base material layer comprises the following raw materials in parts by weight: 65-80 parts of polyethylene glycol terephthalate; 18 to 25 parts of polycarbonate; 4-8 parts of a compatilizer; 3 to 6 parts of styrene-sodium methacrylate ionomer; 1-2.5 parts of a rare earth oxide; 1-3 parts of talcum powder; and 2-5 parts of nano silicon dioxide. The low-shrinkage protective film provided by the invention is used as an electronic screen protective film, and can effectively avoid shrinkage and edge warping phenomena.

The application discloses a kind of bismuth oxygen methacrylic acid hybrid nanoclusters with bamboo joint structure and its preparation method and application, the preparation method includes the following steps: S1, bismuth-containing compound is dissolved in organic solvent to form bismuth-containing organic solution at a certain temperature;S2, sodium methacrylate is added to bismuth-containing organic solution, and react for a period of time at a certain temperature;Collect the reaction product, obtain bismuth oxygen organic hybrid nanoclusters with bamboo joint structure.The preparation method provided by the application solves the problem that inorganic-organic hybrid materials are difficult to prepare and the assembly structure is difficult to control at present, and the construction of bismuth oxygen cluster complexed with methacrylic acid monomer is realized by one-step method.The application first reports bismuth oxygen methacrylic acid hybrid nanoclusters with bamboo joint structure, and explores the regulation mode of nanostructure in mechanism, simultaneously provides potential nano-preparation for the treatment of bladder cancer, and has very high nano-material construction and clinical diagnosis and treatment benefit.

The present application relates to the technical field of oilfield chemistry, and is a kind of amphiprotic polymer and its preparation method and application, the former is obtained by copolymerization of anionic monomer, first cationic monomer, second cationic monomer and crosslinking monomer;The anionic monomer is one or more of sodium vinyl sulfonate, sodium allyl sulfonate, sodium methacrylate sulfonate, sodium p-styrene sulfonate, (4-vinyl) phenyl methane sulfonate sodium, 3-allyloxy-2-hydroxy-1-propane sulfonate sodium or 2-acrylamide-2-methyl propane sulfonate sodium;The first cationic monomer is N-allyl-N, N-dimethyl cyclohexyl ammonium chloride;The second cationic monomer is allyl tributyl phosphonium chloride;The crosslinking monomer is N, N'-methylene bisacrylamide. The amphiprotic polymer has high charge density, outstanding performance as clay stabilizer, high anti-swelling rate, excellent water washing resistance, does not harm the sand carrying capacity of fracturing fluid, and is suitable for fracturing operation in high temperature and even super high temperature reservoir.

This invention discloses a low-shrinkage protective film and its preparation method, relating to the field of film material technology. A low-shrinkage protective film comprises a surface functional layer, a PET substrate layer, a pressure-sensitive adhesive layer, and a release layer sequentially disposed therefrom. The PET substrate layer comprises the following raw materials in parts by weight: 65-80 parts polyethylene terephthalate; 18-25 parts polycarbonate; 4-8 parts compatibilizer; 3-6 parts styrene-sodium methacrylate ionomer; 1-2.5 parts rare earth oxides; 1-3 parts talc; and 2-5 parts nano-silica. The low-shrinkage protective film provided in this application, as an electronic screen protector, can effectively prevent shrinkage and edge curling.

A method for pre-inhibiting coal pillar fractures and initiating a plugging material in situ through a residual inhibitor to achieve synchronous plugging comprises the steps that firstly, an ammonium persulfate solution is injected into the coal pillar fractures, free radicals generated through decomposition of the ammonium persulfate solution can effectively inhibit oxidation of active groups in coal and change the surface characteristics of the coal, and chemical pre-inhibition is achieved; determining the residual concentration of ammonium persulfate in the inhibited solution through an iodometric titration experiment, and determining an optimal time window for injecting the composite monomer solution; injecting a reducing agent and a composite monomer solution composed of sodium methacrylate, hydroxyethyl acrylate and N-hydroxymethyl acrylamide within the optimal time window; a redox initiation system is formed by residual ammonium persulfate and a reducing agent, and polymerization reaction is initiated in situ to generate a polymer plugging material, so that physical plugging is realized. According to the method, two-time utilization of the pre-inhibition-initiation function of the inhibitor is achieved, chemical pre-inhibition and physical plugging are combined, and the coal spontaneous combustion prevention and control efficiency and economical efficiency are remarkably improved.

The invention discloses a classification flotation method of low-magnesium high-power semi-collophanite, which comprises the following steps: crushing the low-magnesium high-power semi-collophanite, grinding the low-magnesium high-power semi-collophanite, performing hydraulic classification to obtain coarse-grain underflow ore pulp and fine-grain overflow ore pulp, adjusting the concentration of the coarse-grain underflow ore pulp, adding a pH regulator and a collecting agent, and performing reverse flotation to obtain coarse-grain concentrate and coarse-grain tailings; adjusting the pH value of the fine-grain overflow ore pulp through a pH adjusting agent, adding a dispersing agent and a collecting agent for dispersing, and then carrying out reverse flotation to obtain fine-grain concentrate and fine-grain tailings; wherein the dispersing agent is any three or more of sodium hexametaphosphate, sodium polymethacrylate, lignosulfonate and humate. The structure flow is more reasonable, the flow is more stable, efficient dispersion and separation of minerals can be promoted, and the separation efficiency is improved.