659 results about "Methylene bisacrylamide" patented technology

The invention belongs to the technical field of battery electrolytes, and particularly relates to a gel polymer electrolyte as well as a preparation method and application thereof. The gel polymer electrolyte is prepared through in-situ polymerization, and the electrolyte is composed of a monomer, a cross-linking agent, an initiator, an organic solvent and a lithium salt. The monomer is selected from fluorine-containing monomers such as trifluoroethyl acrylate, 2, 2, 3, 3-tetrafluoropropyl methacrylate and the like, and the cross-linking agent is selected from NH-containing cross-linking agents such as N, N '-methylene bisacrylamide, hexamethylene bisacrylamide and the like, so that a polymer side chain fluorine-containing functional group is formed in situ and interacts with lithium ions, and lithium ion transmission is promoted; and the NH functional group on the main chain limits the migration of anions, so that the ion migration number is increased. Therefore, the copolymerized fluorine-containing monomer and nitrogen-containing cross-linking agent gel polymer electrolyte enables the battery to show good specific discharge capacity and cycling stability under high current density.

The invention relates to the technical field of adsorption materials, and discloses a preparation method and application of a hydrogel adsorption material prepared by copolymerizing cellulose with acrylic acid and acrylamide. The method comprises the following steps: extracting cellulose from corn straws; placing cellulose in a sodium hydroxide / urea / water system, stirring and dissolving; the preparation method comprises the following steps: uniformly mixing acrylamide and acrylic acid in water to prepare a modified solution; sequentially adding the modified solution, N, N '-methylene bisacrylamide and potassium persulfate into the cellulose solution, and stirring and mixing; putting the mixed solution into a drying oven for gelation to obtain the cellulose co-polyacrylamide and acrylic acid hydrogel adsorption material. A large number of groups such as hydroxyl and carboxyl are introduced to the surface of the hydrogel adsorption material prepared by the method, the adsorption capacities of heavy metals such as lead, cadmium and copper reach 434.8 mg / g, 277.7 mg / g and 261.8 mg / g respectively, and heavy metal ions in a water body can be effectively and quickly removed.

The invention relates to the technical field of oilfield chemistry, and discloses a graft modified cellulose filtrate reducer and a preparation method thereof.The preparation method comprises the following steps that modified hydroxyethyl cellulose, 2-acrylamide-2-methyl propane sulfonic acid, dimethyl diallyl ammonium chloride, alkenylated cardanol and N, N '-methylene bisacrylamide are added into deionized water, stirring is conducted, and a mixture is obtained; the preparation method comprises the following steps: adding cellulose into a reaction kettle, stirring for 10-15 minutes at the temperature of 40-60 DEG C at the speed of 300-400 rpm, dropwise adding ammonium persulfate and sodium hydrogen sulfite into a system, and continuously reacting for 4-6 hours to obtain the grafted modified cellulose filtrate reducer. The filtrate reducer disclosed by the invention has good high temperature resistance and salt resistance.

The invention discloses a multifunctional water-retaining agent adapted to acid soil and a preparation method thereof, and the multifunctional water-retaining agent is prepared from the following raw materials in parts by weight: 9-11 parts of a chitosan solution with the concentration of 0.019-0.021 g / mL, 9-11 parts of a sodium polyphosphate solution with the mass concentration of 0.5-1%, 24-25 parts of an acrylic acid solution with the neutralization degree of 80-85%, 9-11 parts of a guar gum solution with the concentration of 0.019-0.021 g / mL and the balance of water. The mass of the methylene bisacrylamide accounts for 0.01-0.03% of the total dry matter mass of the chitosan, the guar gum and the acrylic acid, the mass of the ammonium persulfate accounts for 0.25-0.35% of the total dry matter mass of the chitosan, the guar gum and the acrylic acid, and the clay mineral accounts for 10-12 parts; the preparation method comprises the following steps: S1, pre-preparation; S2, mixing; and S3, post-treatment. The prepared water-retaining agent not only can greatly improve the water absorption and water retention performance of the chitosan water-retaining agent, but also can reduce the acidity of acid soil and improve the CEC and fertilizer retention capacity of the soil, and is a multifunctional acid red and yellow soil conditioner.

The invention discloses a preparation method of atmospheric water collection porous gel, and belongs to the technical field of environmental ecological restoration, the method comprises the following steps: S1, dissolving a monomer, a foam stabilizer and a foaming aid in an acidic solution, and stirring to form a solution A; s2, mixing N, N '-methylene bisacrylamide, tetramethylethylenediamine and an initiator with the solution A to form a solution B; s3, mixing and stirring a foaming agent and the solution B, and standing for reaction to form a substrate C; s4, drying the matrix C, and immersing the matrix C into the solution D for reaction to form a precursor E; and S5, drying the precursor E to obtain the atmospheric water collection porous gel material. The problems that in the prior art, the preparation process is complex, and the foaming process is uncontrollable are solved.

The invention discloses preparation and application of a block cationic copolymer / quaternary ammonium salt chitosan-based composite hydrogel. The preparation method comprises the following steps: reacting a sodium alginate solution with a NaIO4 solution at room temperature in a dark place to obtain an oxidized sodium alginate solution; adding ethylene glycol into the oxidized sodium alginate solution, reacting, concentrating, dialyzing and drying to obtain oxidized sodium alginate; the preparation method comprises the following steps: mixing acrylamide, 1-butyl-3-vinyl imidazole ammonium bromide, 3-acrylamide phenylboronic acid and quaternary ammonium salt chitosan, dissolving in water, adding ammonium persulfate and N, N-methylene bisacrylamide, heating for reaction, and cooling to obtain a cooling liquid; adding the oxidized sodium alginate solution into the cooling liquid, continuously adding polymerized N, N, N ', N'-tetramethylethylenediamine, reacting and curing to obtain composite hydrogel; and soaking the composite hydrogel in a glycerin / water mixed solution to obtain the composite hydrogel. When the composite hydrogel is used as a wound dressing, the composite hydrogel has the characteristics of good antibacterial activity, high sterilization efficiency, good anti-freezing and anti-drying performance and difficulty in generating drug resistance.

The invention discloses a bacteria surface modification method based on atom transfer radical polymerization reaction mediation, obtained bacteria and application. The modification method comprises the following steps: carrying out acryloylation on the surfaces of the bacteria by using N-hydroxysuccinimide acrylate, and introducing double bonds on the surfaces of the bacteria to obtain acryloylated bacteria; the method comprises the following steps: by taking acrylamide, N-(3-aminopropyl) methacrylamide hydrochloride and N, N '-methylene bisacrylamide as monomers, carrying out polymerization reaction on the surfaces of acrylated bacteria in the presence of an initiator and a catalyst; the mass ratio of the acrylamide to the N-(3-aminopropyl) methacrylamide hydrochloride to the N, N '-methylene bisacrylamide is (11.9 to 17.5) to (0.125 to 1) to (0.1 to 0.5). According to the method, bacteria can be camouflaged to reduce immunogenicity and pathogenicity of the bacteria, the safety of bacteria treatment is improved under the condition that the viability and multiplication capacity of the bacteria are not affected, the resistance of the bacteria to environmental threats is enhanced, and the bacteria are endowed with no exogenous functions.

The invention relates to the field of concrete admixtures, in particular to a high-temperature-resistant early-strength slump-retaining polycarboxylate superplasticizer as well as a preparation method and application thereof. The high-temperature-resistant early-strength slump-retaining polycarboxylate superplasticizer provided by the invention contains unsaturated aryl imide silane which can accelerate the cement hydration acceleration period and shorten the concrete setting time, and cooperates with an imide group to improve the heat resistance of a polymer, and then the heat resistance of the polymer is further improved by virtue of the micro-crosslinking effect of N, N-methylene bisacrylamide, so that the high-temperature-resistant early-strength slump-retaining polycarboxylate superplasticizer is prepared. A huge three-dimensional adsorption structure is formed through high-hydrophilic groups such as phosphate groups and benzene rings in the molecular structure and rigid groups, steric hindrance is increased, the slump retention capacity of concrete is improved, a large number of hydrophilic groups such as carboxyl and hydroxyl can form hydrogen bonds with water molecules, the strength of concrete is enhanced, and the concrete is applied to concrete production and has good application prospects. The premixed concrete has the advantages and technical effects that the premixed concrete still has good fluidity and slump retentivity in a high-temperature environment, the setting time is short, and the early strength is high.

The invention provides an external-soft and internal-rigid plugging agent, a preparation method and a water-based drilling fluid, the preparation method of the external-soft and internal-rigid plugging agent comprises the following steps: (1) reacting silicon dioxide with a vinyl-containing silane coupling agent in an ethanol water solution to obtain modified silicon dioxide; (2) mixing the modified silicon dioxide, acrylamide, 2-acrylamido-2-sodium methylpropanesulfonate, sodium p-styrenesulfonate, N, N-methylene bisacrylamide and water, introducing nitrogen to remove oxygen under stirring and heating conditions, and then adding an initiator to react; and (3) filtering, washing and drying the product obtained in the step (2) to obtain the plugging agent with soft outside and rigid inside. The plugging agent can effectively combine the advantages of high strength of a rigid plugging agent and high adaptive capacity of a flexible plugging agent, can adapt to the sizes and shapes of micro-cracks and cracks in a stratum, and effectively plugs pores and cracks in the surface of a well wall.

The invention discloses a hydrogel patch for gastric perforation repair and a preparation method thereof, and belongs to the technical field of biomedical materials. The preparation method comprises the following steps: dissolving acryloyl valine, acrylic acid, methylene bisacrylamide, a compound A and a photoinitiator in an alcohol solvent, and defoaming to obtain a precursor solution; and placing the precursor solution in a mold, carrying out ultraviolet-induced curing, soaking the obtained hydrogel in a hydrochloric acid solution, and replacing the alcohol solvent to obtain the hydrogel patch for gastric perforation repair. The hydrogel patch provided by the invention has the advantages of strong acid corrosion resistance, good biocompatibility, low swelling ratio, stable adhesion performance in a fluctuating pH environment and the like. The tough and stable adhesion performance ensures that the hydrogel can be permanently and reliably adhered to a gastric perforation part in a dynamic gastric acid environment, and a stable platform is provided for drug delivery, so that the surgical operation time is expected to be shortened, and wound healing is promoted.

The invention relates to the technical field of functional polymer composite materials, and provides diatomite modified composite super absorbent and rapid absorbent resin and a preparation method thereof. The preparation raw materials of the diatomite modified composite high-water-absorption and rapid-water-absorption resin provided by the invention comprise acrylic acid, acrylamide, sodium hydroxide, N, N '-methylene bisacrylamide, ammonium persulfate and modified diatomite. The diatomite is modified by the silane coupling agent, the agglomeration problem of the diatomite is solved, the compatibility with organic monomers is improved, and the modified diatomite, acrylic acid and acrylamide are utilized to construct an organic-inorganic synergistic three-dimensional porous network structure, so that the resin has ultrahigh water absorption rate, rapid water absorption performance and good water retention stability. Meanwhile, the preparation method disclosed by the invention does not need nitrogen protection, has the advantages of simple process, controllable raw material cost and easiness in industrial mass production, and is suitable for multiple fields such as water-saving agriculture, soil moisturizing, landscaping and the like.

The invention relates to a spongy gel phase change cold storage agent for fruit and vegetable preservation and a preparation method thereof. The preparation method comprises the following steps: 1) sequentially adding sodium alginate powder, an N, N '-methylene bisacrylamide aqueous solution, tetramethylethylenediamine and an ammonium persulfate aqueous solution into an acrylamide aqueous solution; (2) transferring the mixed solution into a polytetrafluoroethylene container, quickly putting the polytetrafluoroethylene container into a vacuum dryer filled with allochroic silicagel, vacuumizing by adopting a circulating water vacuum pump, and sealing for overnight cross-linking to prepare spongy gel; and 3) soaking the spongy gel in a potassium chloride solution to prepare the spongy gel phase change cold storage agent. The spongy gel phase change cold storage agent prepared by the method disclosed by the invention has high phase change latent heat and high flexibility; the device can be freely cut to fit the logistics space, and the problem that the internal environment temperature of the logistics space is not uniform due to local cooling is avoided; the potassium chloride solution is used as an additive for adjusting the phase change temperature of the gel cold storage agent, and the appropriate phase change temperature can be adjusted according to different fruits and vegetables.

The invention relates to the technical field of fertilizer slow release, and discloses a temperature-responsive starch-based gel coated slow-release fertilizer, which comprises the following raw materials: amorphous starch: a starting material is common corn starch; the cross-linking agent is N, N '-methylene bisacrylamide (MBA); n-isopropylacrylamide (NIPAM) is used for endowing the gel with temperature responsiveness; acrylamide (AM): as a comonomer to improve gel performance; the urea is used as a core component of the slow-release fertilizer; the absolute ethyl alcohol is used for wetting the surface of urea and promoting uniform coating of the SNA powder. According to the invention, the gel can automatically adjust the internal microporous structure according to different soil temperatures, so as to accurately control the release rate of nutrients, effectively solve the problem that the traditional slow release fertilizer cannot dynamically adjust the nutrient release according to the environmental change, and meet the differentiated demands of plants for nutrients in different growth stages.

The invention discloses a fire extinguishing agent for battery fire prevention and control and a preparation method thereof, and relates to the technical field of fire extinguishing materials. When the fire extinguishing agent for battery fire prevention and control is prepared, lanthanum nitrate hexahydrate reacts with 1, 3, 5-tribenzoic acid to prepare a lanthanum organic metal framework; loading ammonium dihydrogen phosphate onto a lanthanum organic metal framework by adopting a solventing-out crystallization technology to prepare composite flame-retardant particles; reacting cellulose with sodium hydroxide and sodium acrylate in sequence to obtain modified cellulose; mixing the modified cellulose with the composite flame-retardant particles and expanded graphite, and carrying out cross-linking by using N, N '-methylene bisacrylamide, so as to prepare temperature-sensitive hydrogel; and mixing the temperature-sensitive hydrogel with sodium carbonate and glacial acetic acid, drying, and grinding into particles to obtain the fire extinguishing agent for battery fire prevention and control. The fire extinguishing agent for battery fire prevention and control has excellent fire extinguishing performance.

The invention relates to the technical field of biomedical dressings, in particular to a dressing for a diabetic foot wound surface and a preparation method of the dressing. 0.2 to 0.8 part of reduced graphene oxide; 2 to 5 parts of beta-1, 3-glucan modified by chondroitin sulfate; 0.08 to 0.3 part of silver nitrate; 3 to 7 parts of N-isopropyl acrylamide-co-acrylic acid; 0.15 to 0.4 part of N, N '-methylene bisacrylamide; 2 to 5 parts of sulfhydrylated hyaluronic acid; 0.3 to 0.8 part of D-alpha-vitamin E polyethylene glycol succinate; 2 to 5 parts of amino-functionalized mesoporous silica; 1 to 3 parts of L-arginine-L-glutamate; 0.1 to 0.4 part of genipin; the super-strong mechanical property and the super-strong flexibility are realized, so that the dressing can better adapt to the irregular shape of a wound surface, and continuous protection is provided.

The invention discloses a preparation method and application of a photo-thermal dual-response membrane material, and relates to the field of membrane materials. When the photo-thermal double-response membrane material is prepared, a photo-thermal material firstly reacts with 4-(triethoxysilyl) aniline and then reacts with 2, 4, 6-trihydroxy-1, 3, 5-benzenetricarboxaldehyde and p-phenylenediamine, and a modified photo-thermal material is prepared; the preparation method comprises the following steps: sequentially reacting benzaldehyde with 2-hydroxyacetophenone and 3-N, N-dimethylamino methacryloyl chloride to prepare a photo-initiation monomer; the preparation method comprises the following steps: mixing N-isopropylacrylamide, a photo-initiation monomer, N, N '-methylene bisacrylamide and a modified photo-thermal material, combining with a hydrophobic substrate membrane, preparing a membrane, and finishing the surface by using 2-bromo-1-[3, 5-di (tert-butyl)-4-hydroxyphenyl] ethanone, thereby obtaining the photo-thermal dual-response membrane material. The photo-thermal dual-response membrane material prepared by the invention has the characteristics of pollution resistance, easiness in cleaning, durability, antibacterial property, metal ion recovery and low energy consumption.

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 belongs to the technical field of composite materials and sensors, and particularly relates to a preparation method and application of an ultrahigh-tensile conductive hydrogel material. The preparation method comprises the following steps: adding acrylamide (AM), N, N '-methylene bisacrylamide (MBA), ammonium persulfate (APS) and an MXene organic dispersion liquid into a sodium carboxymethyl cellulose (CMC-Na) solution at room temperature, and uniformly stirring to obtain a prefabricated liquid; transferring into a mold, and carrying out polymerization reaction in a drying oven for 2-6 hours to prepare CMC-Na / PAM / MXene conductive hydrogel of an interpenetrating network; the prepared CMC-Na / PAM / MXene conductive hydrogel of the interpenetrating network is soaked in ethylene glycol aqueous solutions with different concentrations, and after solvent replacement, the ultrahigh-tensile conductive hydrogel is prepared. The MPAE conductive composite hydrogel provided by the invention can accurately monitor tiny motion information of a human body and has good sensing performance.

The invention discloses a preparation method of a cellulose ether grafted concrete slurry purifying agent. The preparation method is characterized by comprising the following steps: (1) mixing and stirring urea, deionized water and hydroxypropyl methyl cellulose ether into transparent mucus; (2) adding a silane coupling agent, N, N-methylene bisacrylamide and a polyether monomer, and continuously stirring uniformly; (3) preparing three dropwise adding solutions and a polymerization inhibitor solution; (4) simultaneously dropwise adding the three dropwise adding liquids into the material obtained in the step (2) at a constant speed; and (5) keeping the temperature after dropwise adding, adding the polymerization inhibitor solution obtained in the step (3), and supplementing a proper amount of water to obtain the cellulose ether grafted concrete slurry purifying agent. The urea solution is used for preventing the agglomeration phenomenon of the cellulose ether in the synthesis process, and meanwhile, the coupling agent is used for connecting cellulose ether molecules to molecular side chains; the macromolecules connected with the cellulose ether structure can provide steric hindrance, so that the fullness degree of cement paste is improved, and the paste extraction effect is achieved.

The invention discloses an antibacterial composite material for water treatment and a preparation method thereof in the technical field of composite materials, and the antibacterial composite material is prepared from the following components in parts by weight: 20-25 parts of a magnetic nano material, 19-22 parts of acrylic acid, 6-9 parts of allylamine, 1.8-2.2 parts of N, N '-methylene bisacrylamide, 1.3-1.6 parts of azodiisobutyronitrile and 4.3-5.5 parts of plant polyphenol. Cobalt ferrite is used as a magnetic core to prepare a magnetic nano material to improve the recovery rate, acrylic acid and allylamine are used as polymeric monomers to form a polymer layer with high adsorption capacity, and plant polyphenols are combined on the surface, so that the adsorption performance and the catalytic decomposition performance are enhanced, and the antibacterial effect of the material is improved at the same time; further, the composite material with the functions of adsorbing heavy metal ions, decomposing organic pollutants and resisting and inhibiting bacteria is obtained.

The invention belongs to the technical field of energy storage system device materials, and particularly relates to a modified silk amino acid-based gel electrolyte as well as a preparation method and application thereof. The method comprises the following steps: S1, uniformly mixing and stirring 15 to 30g of acrylamide, 50 to 60g of zinc sulfate heptahydrate, 0.1 to 1g of silk amino acid and 100g of water; adding 5mL to 10mL of ethanol, and uniformly shaking; then sequentially adding a proper amount of N-N methylene bisacrylamide and a photoinitiator, and continuously stirring until the solution is clear to obtain an electrolyte; s2, dropwise adding the prepared electrolyte into a polytetrafluoroethylene (PTFE) plate, and covering the polyurethane fiber membranes obtained by electrostatic spinning on the two sides; and carrying out light curing under ultraviolet irradiation to obtain the modified silk amino acid (M-SAA) gel electrolyte. According to the invention, silk amino acid (SAA) is introduced to construct a compact protective film with a beta folding structure, so that zinc dendrite growth and side reaction are inhibited, and the stability of the zinc negative electrode of the battery and the cycle performance of the battery are improved.

The invention relates to the technical field of oilfield chemistry and high-temperature and high-salt oil reservoir profile control and water shutoff, in particular to a preparation method, a product and application of polymer gel particles with enhanced mechanical properties through a double-crosslinking domain structure. The preparation method comprises the following steps: dissolving a monomer, a cross-linking agent and an initiator in water, and carrying out free radical polymerization reaction to obtain polymer hydrogel; and drying the polymer hydrogel to obtain the polymer gel particles, the monomers comprise acrylamide, acrylic acid, N-(hydroxymethyl) acrylamide and 2-acrylamide-2-methylpropanesulfonic acid; the cross-linking agent comprises methacrylic acid esterified lignosulfonate and / or N, N '-methylene bisacrylamide. The preparation method disclosed by the invention is simple, and the polymer gel particles prepared by utilizing the method have a unique double-crosslinking domain structure, have excellent mechanical properties and excellent temperature resistance and salt tolerance, and are suitable for profile control and water shutoff of high-temperature and high-salt oil reservoirs.

The invention relates to the technical field of ceramics, in particular to aluminum oxide ceramic slurry as well as a preparation method and application thereof. The aluminum oxide ceramic slurry is prepared from alpha-aluminum oxide coarse powder, alpha-aluminum oxide fine powder, modified aluminum oxide powder, acrylamide, N, N '-methylene bisacrylamide and deionized water, multiple active functional groups are introduced into the surface of the modified aluminum oxide powder, interface bonding of particles with a dispersion medium and a polymer monomer is enhanced, and the surface of the particles is improved. According to the present invention, with the preparation method, the particle agglomeration tendency is reduced, such that the slurry can maintain the low viscosity under the high solid content condition so as to meet the gel injection molding process requirements, and the sintering body obtained through the gel injection molding has characteristics of high bending strength and high hardness, and can be widely used in the fields of electronic devices, mechanical sealing members, biomedical apparatuses and instruments, and the like.

The invention discloses an in-situ self-condensing hydrogel based on hydrothermal carbonization synthesis and a preparation method thereof, belongs to a water retention material in an ecological restoration technology and an in-situ self-condensing technology, and aims to solve the technical problems of high energy consumption and serious environmental pollution during hydrogel preparation in the prior art. The preparation method comprises the following steps: preparing modified hydrothermal carbon filtrate, N, N '-methylene bisacrylamide, acrylamide and ammonium persulfate; the modified hydrothermal carbon filtrate comprises plant powder, sodium hydroxide and urea; the preparation method comprises the following steps: weighing sodium hydroxide and urea, and dissolving to obtain a mixed solution; weighing plant powder, pouring the plant powder into the mixed solution, uniformly mixing, reacting and carrying out suction filtration to obtain modified hydrothermal carbon filtrate, so as to obtain a mixture 1; uniformly mixing N, N '-methylene bisacrylamide, acrylamide and the mixture 1, adding ammonium persulfate, uniformly mixing to obtain a mixture 2, reacting the mixture 2 at normal temperature, washing, and drying to obtain the in-situ self-condensing hydrogel.

The invention relates to the technical field of fertilizers, and discloses a pH-responsive starch-based gel coated slow-release fertilizer, which comprises a core fertilizer and a pH-responsive starch-based gel coating coated on the surface of the core fertilizer, and is characterized in that the core fertilizer is urea, and a coating material is prepared from amorphous starch, an acrylic acid (AA) monomer and a cross-linking agent N, N-dimethylformamide. The polymer is prepared from N, N '-methylene bisacrylamide (MBA) and an initiator potassium persulfate (KPS) through a cross-linking polymerization reaction. Through a specific preparation process, common corn starch is converted into amorphous starch, the amorphous starch is successfully cross-linked with an acrylic acid (AA) monomer and a cross-linking agent N, N '-methylenebisacrylamide (MBA) to form the pH-responsive starch-based gel with a three-dimensional network structure, and the permeability of the gel can be intelligently adjusted according to the change of the pH value of soil, so that the pH-responsive starch-based gel can be applied to the field of soil remediation. Therefore, rapid release of nutrients in acid soil is promoted, release of nutrients in alkaline soil is slowed down, and the pH responsiveness of the fertilizer is remarkably improved.

The invention relates to the technical field of microsphere profile control agents, in particular to a high-temperature-resistant polymer microsphere profile control agent and a preparation method thereof. At the temperature higher than 70 DEG C, the structure of a conventional polyacrylamide microsphere is easily degraded, and the water channeling phenomenon cannot be slowed down in the water injection and oil extraction process. In order to solve the technical problems, the invention provides the high-temperature-resistant polymer microsphere profile control agent, the structure of the high-temperature-resistant polymer microsphere profile control agent is a microsphere obtained by reacting acrylamide, allylamine, nitrogen-nitrogen methylene bisacrylamide and activated carbon quantum dots under a reverse emulsion polymerization condition, and the carbon quantum dots are mainly introduced into a polyacrylamide microsphere molecular structure, so that the high-temperature-resistant polymer microsphere profile control agent is prepared. The carbon quantum dots can play a role in supporting a framework in a high-temperature environment, the stability of the polyacrylamide microspheres at the high temperature can be effectively improved, it is ensured that the profile control agent effectively plays a water plugging role in the high-temperature water injection oil extraction process, and the water channeling phenomenon is remarkably reduced.

The invention relates to lignin-doped montmorillonite hydrogel as well as a preparation method and application thereof, and belongs to the field of functional materials. A preparation method of lignin-doped montmorillonite hydrogel comprises the following steps: sequentially adding montmorillonite k-10, methacryloyloxyethyl trimethyl ammonium chloride, acrylic acid, acrylamide, N, N-methylene bisacrylamide and potassium persulfate into an aminated lignin aqueous solution, uniformly stirring, carrying out a free radical polymerization reaction, soaking the obtained product in deionized water, and drying to obtain the lignin-doped montmorillonite hydrogel. The lignin doped montmorillonite hydrogel is obtained. The method for preparing the lignin-doped montmorillonite hydrogel is a one-step preparation method, the process is simple, the production cost is low, and the lignin-doped montmorillonite hydrogel is more suitable for large-scale industrial utilization. The lignin-doped montmorillonite hydrogel prepared by the preparation method disclosed by the invention contains rich active sites, has relatively strong adsorption capacity on nitrogen and phosphorus ions and micro-plastics, and can adsorb the nitrogen and phosphorus ions and the micro-plastics at the same time.

The invention discloses chitosan-based conductive hydrogel and a preparation method thereof.The method comprises the steps that chitosan is added into isopropanol, after a primary reflux reaction, an aqueous solution of 2, 3-epoxypropyltrimethylammonium chloride is added, a secondary reflux reaction continues, and quaternary ammonium chitosan is prepared; the preparation method comprises the following steps: adding quaternary ammonium chitosan into an aqueous solution of acrylic acid, stirring and dissolving, adjusting the pH value of a system to 7, then adding an aqueous solution of polyvinyl alcohol, stirring uniformly, adding ammonium persulfate and N, N '-methylene bisacrylamide, stirring and fully dissolving to obtain a hydrogel precursor; and performing polymerization treatment on the hydrogel precursor, and soaking the hydrogel precursor in a mixed solution of potassium hydroxide and zinc acetate to prepare the chitosan-based conductive hydrogel. The preparation process is simple, and the problems of insufficient conductivity, weak mechanical property and insufficient stability of the biomass-based hydrogel are systematically solved through quaternization modification, a multi-crosslinking strategy and electrolyte post-treatment.

The invention belongs to the technical field of thermoelectric materials and functional polymer materials, and particularly relates to thermoelectric hydrogel based on synergistic enhancement of zwitterions and a polar solvent as well as a method and application of the thermoelectric hydrogel. The thermoelectric hydrogel is obtained through the steps that a precursor solution is subjected to a polymerization reaction to form a gel matrix, then the gel matrix is soaked in a soaking solution, potassium ferricyanide / potassium ferrocyanide redox couple is introduced, and the thermoelectric hydrogel is obtained, and the precursor solution is prepared from acrylamide, N-isopropylacrylamide, dimethyl sulfoxide, N, N-dimethylformamide, N, N-dimethylformamide, N, N-dimethylformamide, N, N-dimethylformamide, N, N-dimethylformamide and N, N-dimethylformamide. The photoinitiator is prepared by mixing N, N-dimethylformamide, 1-ethyl-3-methylimidazolium tetrafluoroborate, a zwitterionic monomer [2-(methylacryloyloxy) ethyl] dimethyl-(3-sulfopropyl) ammonium hydroxide, a cross-linking agent N, N '-methylene bisacrylamide, a photoinitiator and deionized water. The thermoelectric hydrogel prepared by the invention has high mechanical strength, high ductility and high Seebeck coefficient, and has better temperature resistance.

The invention relates to the technical field of preparation methods of biomimetic enzyme reactors, and particularly discloses a preparation method and application of a biomimetic enzyme aerogel reactor, and the preparation method specifically comprises the following steps: step S1, firstly preparing titanium dioxide nanofibers (TiNFs) through solvent heat treatment; step S2, carrying out freeze casting and vacuum drying on an aqueous dispersion containing titanium dioxide nanofibers (TiNFs), chitosan methacrylate (CSMA) and a cross-linking agent to obtain a bionic C / TiNFs aerogel reactor with vertically arranged channels; step S3, carrying out polymerization and modification on glycidyl methacrylate (GMA), methacryloylethyl sulfobetaine (SBMA) and an N, N '-methylene bisacrylamide (MBA) cross-linking agent on a skeleton of the simulated gas gel reactor; and step S4, covalently immobilizing tannase in the bionic gas gel reactor under a mild condition, so as to obtain the bionic tannase-pGSC / TiNFs enzyme reactor. The bionic tannase-pGSC / TiNFs enzyme reactor disclosed by the invention is composed of TiNFs, CSMA (Carboxymethyl Methacrylate), polyglycidyl methacrylate (PGMA), polymethylacryloyl ethyl sulphobetaine (PSBMA) and immobilized tannase, has vertically arranged channels, and can be used as a tissue cell reactor.