4009 results about "Polyacrylamide" patented technology

The invention belongs to the technical field of nano oil displacement, and particularly relates to rambutan-shaped polyacrylamide nanospheres as well as a preparation method and application thereof. The microspheres prepared by taking PAMAM as a matrix to load the copper quantum dots to initiate acrylamide polymerization have smaller particle sizes. The spherical particle characteristic of the metal copper quantum dots leads to non-uniform polymerization rate, formation of irregular morphology of the nanospheres can be promoted, and finally the rambutan-shaped polyacrylamide nanospheres are prepared. The nanosphere has good hydration expansion performance, the swept volume of injected water is increased, and the effect of deep profile control is achieved. Moreover, the surface of the polyacrylamide nanosphere presents the shape of rambutan, so that the expansion and fracture phenomenon after water absorption can be avoided, the interaction force between the nanospheres is enhanced, and the plugging effect is better. Meanwhile, as the nanospheres absorb water and swell, the swelled antennas play a role in crosslinking the nanospheres, and a better plugging effect can be achieved.

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 belongs to the technical field of nano materials, and particularly relates to a burr-shaped polyacrylamide nanosphere as well as a preparation method and application thereof. According to the invention, sulfhydrylated PAMAM is used as a matrix to load copper quantum dots to initiate polymerization of acrylamide monomers, so that the nanoscale polymer microspheres are prepared. The PAMAM has high geometric symmetry, so that dense sulfydryl functional groups are introduced to the surface of the PAMAM and can form stronger coordinate bonds with the metal copper quantum dots, and the quantum dots are uniformly fixed on the outer surface of the PAMAM. And due to the characteristics of the spherical particles, the surface polymerization rate of the sulfhydrylation PAMAM loaded with the metal copper quantum dots is nonuniform, and formation of burr-shaped nanosphere morphology is promoted. After the burr-shaped nanospheres absorb water and expand, the effect of cross-linking and interlocking to improve the plugging efficiency can be achieved, the burr-shaped tip structure can achieve the effect similar to a brush, the acting force between oil drops and rock and the flowing resistance of crude oil in a reservoir are reduced, and therefore the recovery efficiency is improved.

A method of making an absorbent structure including mixing ultra-high molecular weight (“UHMW”) glyoxalated polyvinylamide adducts (“GPVM”) and / or high molecular weight (“HMW”), glyoxalated polyacrylamide and / or high cationic charge glyoxalated polyacrylamide (“GPAM”) copolymers and high molecular weight (“HMW”) anionic polyacrylamide (“APAM”) with the furnish during stock preparation of a wet laid papermaking process.

The invention discloses a foam base fluid, a preparation method and a preparation method of a temperature-resistant and salt-resistant CO2 foam flooding system.The foam base fluid comprises a foaming agent, a foam stabilizer and water, the foaming agent is a betaine type surfactant, and the foam stabilizer is a biological polysaccharide polymer. A temperature-resistant and salt-resistant foam base solution and a biological polysaccharide reinforced CO2 foam oil displacement system are obtained by introducing a biological polysaccharide polymer as a foam stabilizer and combining with a betaine type surfactant, so that the problem that the viscosity of polyacrylamide as a traditional foam stabilizer is reduced and even fails in a high-temperature and high-salt environment is effectively solved; the stability of CO2 foam can be obviously improved. Meanwhile, the biological polysaccharide polymer has the characteristics of environmental friendliness and degradability, and can effectively reduce the negative influence on the environment. In addition, due to rich resources and low price of the biological polysaccharide, the system is competitive in cost, and the economic benefit of the oil field can be further improved.

The invention discloses a temperature-resistant and salt-resistant polyacrylamide flocculant, a preparation method and application, the preparation method of the temperature-resistant and salt-resistant polyacrylamide flocculant comprises the following steps: S1, dissolving acrylamide and a cationic monomer in deionized water, and uniformly stirring to obtain a mixed solution A; s2, adding urea and dimethylaminoethyl methacrylate into the mixed solution A in the S1, and uniformly mixing to obtain a polymerization solution; s3, adding a functional monomer into the polymerization solution in the S2, and uniformly mixing to obtain a mixed solution B; and S4, adding an initiator into the mixed solution B obtained in S3, carrying out a polymerization reaction, cooling, neutralizing, filtering and drying after the reaction to obtain the temperature-resistant and salt-resistant polyacrylamide flocculant. The temperature-resistant and salt-resistant polyacrylamide flocculant prepared by the preparation method disclosed by the invention has good temperature-resistant and salt-resistant performance as a flocculant.

The invention relates to an intelligent production management system and method for high-concentration polyacrylamide fracturing fluid, and the method comprises the steps: obtaining multi-source heterogeneous data through designing a unique algorithm model and an innovative data processing flow: an innovative data collection and fusion strategy, and designing a comprehensive and high-precision data collection system; based on intelligent control algorithm innovation of a fuzzy neural network and MPC, the fuzzy neural network and model prediction control are combined to carry out production process control, a robust optimization method is introduced to enhance the robustness of a control strategy, and meanwhile, a rule-based emergency processing mechanism is established; intelligent mechanism innovation of quality monitoring and optimization is realized, and real-time monitoring and analysis of product quality are realized by establishing a quality prediction model based on combination of support vector machine regression (SVR) and a particle swarm optimization (PSO) algorithm.

The invention provides a modified coal gangue-based large-flow-state grouting and water plugging material and a preparation method thereof. Comprising 80-90 parts of a coal gangue sample, 1-5 parts of Portland cement, 1-5 parts of sulphoaluminate cement, 0.51-3 parts of a polycarboxylic acid water reducing agent, 1-4 parts of cellulose ether with the viscosity of 200w, 0.1-5 parts of a calcium oxide expanding agent, 0.5-5 parts of a plastic expanding agent, 0.5-1 part of redispersible latex powder, 0.5-5 parts of polyacrylamide with the molecular weight of 1000 and water, and the water-material ratio is 0.4. According to the modified coal gangue-based large-flow-state grouting and water plugging material and the preparation method thereof, the cement consumption can be remarkably reduced, the cost is reduced, the utilization rate of solid wastes (such as coal gangue) is increased, and the material has good flow-state performance and adjustable setting time; the method is suitable for deep and large shaft surrounding rock water seepage treatment in coal mining and other mine engineering.

The invention relates to the technical field of thickening agents, and discloses a preparation method of a high-temperature-resistant thickening agent for fracturing. According to the preparation method disclosed by the invention, acrylamide, sulfobetaine modified acrylamide and pyrrolidone modified naphthyl melamine are polymerized, so that the thickening agent for high-temperature-resistant fracturing is obtained. A triazine ring structure and naphthyl have high stability, the rigidity of a polyacrylamide molecular chain and the hydrophobic association effect between molecules are enhanced, the high temperature resistance and the salt resistance are improved, and due to the conjugation effect formed by two benzene rings in naphthyl, the thermal stability is further enhanced; by introducing vinyl pyrrolidone, hydrolysis of amido in polyacrylamide can be inhibited, and the temperature resistance and salt resistance of the thickening agent are improved; under a high-salt condition, due to weakening and shielding of mutual attraction of salt ions to anionic and cationic groups in the sulfobetaine, polyacrylamide molecules are more stretched, macroscopically, the viscosity is increased or reduced slightly, and the temperature resistance and salt resistance are improved.

The invention discloses a low-carbon polymer modified all-solid waste premixed fluid-state soil, which is prepared from the following components in parts by weight: 10-30 parts of low-carbon polymer modified all-solid waste premixed fluid-state soil, the concrete is prepared from the following components in parts by weight: 5-10 parts of a modifier, 5-10 parts of an exciting agent, 1-5 parts of an additive, 1-5 parts of a retarder, 10-20 parts of coal gangue powder, 10-20 parts of carbide slag, 10-20 parts of bentonite, 35-40 parts of fly ash, 35-40 parts of slag powder, 100 parts of clay powder, 145 parts of machine-made medium sand and 150 parts of water. According to the invention, the polymer polyacrylamide is added into the fluid soil, so that the compressive strength of the fluid soil stone body is improved; when the polyacrylamide is mixed with the fluid soil, active components in the polymer emulsion and components in the fluid soil are subjected to a cross-linking reaction to form a more complex network structure, so that a dispersion system of the slurry can be remarkably improved, the repulsive potential energy among particles in a multiphase dispersion is reduced, and the integrity and the stability of the slurry are enhanced; the slurry is not easy to separate when being injected into underground rock strata or fractures, and good uniformity and flowability are maintained.

The invention relates to the technical field of papermaking, in particular to a papermaking filler wrapping agent and a preparation method and application thereof. The papermaking filler wrapping agent comprises a cationic polyester polyacrylamide emulsion and a high molecular weight water-soluble polymer. The papermaking filler wrapping agent has the advantages that the papermaking filler wrapping agent is insensitive to shearing action, the retention rate of filler such as calcium carbonate is high, the paper strength is not reduced, and produced paper products are good in batch stability.

The invention relates to a liquid metal / MXene / sodium alginate / polyacrylamide composite hydrogel material as well as a preparation method and application thereof. The hydrogel material comprises liquid metal microspheres, a hierarchical porous network formed by sodium alginate and polyacrylamide, and flaky MXene. The preparation method comprises the following steps: S1, adding liquid metal into an aqueous solution, and carrying out ultrasonic dispersion to obtain dispersion liquid; s2, adding the dispersion liquid into a sodium alginate solution, and performing ultrasonic treatment to obtain a sodium alginate-coated liquid metal aqueous solution; s3, acrylamide is dissolved in deionized water, then the aqueous solution of the liquid metal wrapped by sodium alginate is added, then a cross-linking agent, an initiator and MXene are added, and the mixture is stirred to be uniform; and S4, pouring into a mold, and heating to form the hydrogel. The composite hydrogel material prepared by the invention has the advantages of high stretch rate, strong electromagnetic shielding performance and the like, and can be used as electronic skin for electromagnetic shielding, human health monitoring, man-machine communication and soft robots.

The invention belongs to the technical field of crop genetic breeding, and relates to a linked molecular marker of a peanut hypocotyl elongation related gene locus, an identification method and application of the linked molecular marker. The primer pair is C2-15-F / R, and the sequence of the primer pair is as shown in SEQ ID NO. 1 and SEQ ID NO. 2; by designing an InDel marker C2-15, the peanut hypocotyl length character can be quickly distinguished by using a primer to amplify a target band and using polyacrylamide gel electrophoresis detection. The identification method is more accurate and convenient, has good repeatability, can efficiently distinguish the phenotype and genotype of an individual, shortens the experiment process, has the advantages of simple and feasible operation steps and the like, and saves expenditure. The method disclosed by the invention has important application value in the breeding work aspects such as peanut hypocotyl elongation character related gene positioning, genotype typing and later cultivation of excellent peanut varieties.

The invention relates to a preparation method and application of a mine water flocculation agent with an adsorption function. The mine water flocculation agent is prepared from the following raw materials: a mineral material, chitosan, water, silicate, acid, aluminum chloride salt, ferric chloride salt and polyacrylamide. The preparation method comprises the following steps: carrying out heat treatment on a mineral material, then adding water and chitosan, then adding silicate, reacting to generate polysilicic acid, grafting the polysilicic acid on chitosan macromolecules, then adding aluminum chloride salt and ferric chloride salt, reacting, finally adding polyacrylamide, and aging to obtain the composite material. The mine water flocculating agent provided by the invention can synchronously remove suspended matters, fluorides and COD (Chemical Oxygen Demand), and has the advantages of low dosage, short reaction time and high settling speed.

The invention relates to the field of skin care and medical cosmetology, and discloses a long-acting moisturizing and barrier repairing type exosome active gel and a preparation method thereof, and the gel comprises the following components by mass: 2-5 parts of exosome; 3 to 7 parts of trehalose; 2 to 6 parts of glycerol; 1 to 2 parts of polyvinyl acrylate; 0.5 to 1.5 parts of octyl glucoside; 0.8 to 1.5 parts of sodium hyaluronate; 0.2 to 0.5 part of low molecular peptide; 1 to 3 parts of polyacrylamide; and 0.02 to 0.05 part of a tea polyphenol antioxidant. According to the invention, through synergistic repair of the exosome and the low-molecular peptide, dual moisturizing of the trehalose and the glycerol, a thickening system is innovated to improve the stability, and the tea polyphenol antioxidant is combined, so that deep repair, lasting moisturizing, skin feeling optimization and aging resistance are effectively realized, and multiple bottleneck problems of a traditional skin care technology are comprehensively solved.

A solid waste-based reinforced ceramic tile adhesive and a preparation method therefor. The solid waste-based reinforced ceramic tile adhesive comprises 17-22% of polyacrylamide modified solid waste residue powder, 3-7% of cement, 7-12% of tailing micro powder, 55-65% of graded tailing sand and 8-13% of a tensile adhesive. By limiting the raw material components and content of the tensile adhesive, the tensile adhesive strength of the solid waste-based adhesive with different substrates and the construction performance thereof can be ensured; and the solid waste residue powder is modified by using a very small amount of low-molecular-weight polyacrylamide, such that the stability of the system can be significantly improved, and the comprehensive performance of the solid waste-based ceramic tile adhesive can be enhanced. The solid waste-based reinforced ceramic tile adhesive comprises 90 wt% or more of solid wastes. By limiting the components and contents of each raw material, all components can act synergistically, so that the solid waste-based reinforced ceramic tile adhesive can replace traditional cementing materials such as cement, which greatly reduces the cost, realizes the comprehensive utilization of industrial solid waste materials, and has significant advantages such as saving on energy, having environmental protection and being low carbon.

The invention relates to the field of zinc ion batteries, in particular to a disaccharide eutectic gel electrolyte and a preparation method and application thereof. The preparation method of the disaccharide eutectic gel electrolyte comprises the following steps: firstly, adding disaccharide, choline compounds and zinc sulfate into deionized water, heating and uniformly stirring, then adding a polyacrylamide monomer as well as a thermal initiator and a cross-linking agent which are adaptive to a polymerization reaction with the monomer, and carrying out thermal initiation to form the disaccharide eutectic gel electrolyte. According to the invention, two additives, namely disaccharide and choline, are ingeniously introduced into the traditional gel electrolyte, and the two additives can form the stable disaccharide eutectic gel electrolyte together in the heating and stirring process. According to the innovative strategy, a polyacrylamide hydrogen bond network is enhanced, the cycle performance of the gel electrolyte battery is greatly improved, the configuration entropy of the system is increased due to introduction of the multi-component additive, the problem that an existing gel zinc battery is low in cycle performance is solved, and application of the gel zinc battery in a harsh temperature environment becomes possible.

The invention discloses a wearable medical monitoring equipment electrode which is composed of a layered structure and comprises a transparent flexible substrate layer which is made of a biocompatible flexible polymer material and is used for providing flexible support and isolating a metal electrode from the skin; the metal grid copper transparent electrode layer is formed on the surface of the transparent flexible substrate layer through a yellow light etching micro-nano processing technology; the conductive gel layer uniformly covers the surface of the metal grid copper electrode layer; the encapsulation layer is formed by spin-coating a polymethyl methacrylate solution on the surface of the conductive gel layer and forming a transparent protection layer after curing; the gradient line width bionic honeycomb-shaped copper grid design is adopted, the light transmittance is kept, meanwhile, the collection efficiency of physiological electric signals is remarkably improved, signal transmission loss is reduced, through the polyacrylamide and nanocellulose composite gel formula and micro-channel dynamic humidity adjustment, signal stability under long-term wearing is ensured, and the application range is wide. The problem of signal distortion caused by dryness of traditional gel is solved.

The invention provides application of poly-2-acrylamide-2-methylpropanesulfonic acid in removal of residual lithium on the surface of a high-nickel NCM ternary material, and relates to the technical field of surface treatment of the high-nickel NCM ternary material. The method aims at solving the problem that an existing method for removing lithium carbonate on the surface of an NCM material through high-temperature calcination or high-concentration ethyl alcohol soaking and cleaning has adverse effects on the structure and performance of the high-nickel NCM ternary material. According to the invention, the cleaning agent using poly-2-acrylamide-2-methylpropanesulfonic acid as a main component is provided for cleaning the residual lithium of the high-nickel NCM ternary material, and verification proves that the high-nickel NCM ternary material can be effectively prevented from being damaged by existing high-temperature calcination and high-concentration ethanol soaking and cleaning treatment, and meanwhile, the electrochemical performance of the high-nickel NCM ternary material is remarkably improved.

The preparation method of the high-temperature-resistant diaphragm for the lithium battery comprises the following steps: uniformly mixing water, a dispersing agent and an inorganic ceramic material in a mass ratio of (65-75): (0.5-0.8): (35-25), stirring and grinding to obtain a mixed solution; a modified acrylic polymer binder, a polyacrylamide polymer binder, a wetting agent and the mixed solution are mixed to be uniform, high-heat-resistance coating slurry is obtained, and the mass ratio of the modified acrylic polymer binder to the polyacrylamide polymer binder to the wetting agent to the inorganic ceramic material is (1.5-2.5): (1.5-2.5): (0.03-0.06): 100; and coating two opposite surfaces or any one surface of a polyolefin base membrane with the high-heat-resistance coating slurry to form a coating on the corresponding surface of the polyolefin base membrane, and drying to obtain the high-temperature-resistant diaphragm for the lithium battery.

The invention discloses an electrocatalyst material for in-situ production of hydrogen peroxide through oxygen reduction as well as a preparation method and application of the electrocatalyst material, and belongs to the field of organic wastewater treatment. MoS2 / Fe porous conductive particles and a high-molecular polymer are adopted as main components, and ethanedioate and polyacrylamide are combined as a dispersion auxiliary solvent and a pore-forming agent to form a three-dimensional composite conductive catalyst material; through ultralow-temperature freeze drying and microwave radiation technologies, the material structure is optimized, the catalytic reaction active sites are improved, and efficient electrocatalytic oxygen reduction for in-situ production of hydrogen peroxide is realized; the MoS2 / Fe porous conductive particles not only optimize the performance of the catalyst, but also realize high-valued utilization of solid wastes; the electrocatalyst material has excellent conductivity, catalytic activity and organic wastewater degradation capability, is stable in removal effect before and after use, can be repeatedly used for multiple times, reduces the use cost, and provides a wide application prospect for the fields of environmental protection, energy and the like.

The invention discloses an energy-saving and environment-friendly polyarylate fabric whole-core flame-retardant conveying belt and a manufacturing method thereof. The energy-saving and environment-friendly polyarylate fabric whole-core flame-retardant conveying belt comprises a polyarylate fabric whole belt core, a covering layer and a belt core dipping sizing material, the covering layer comprises the following components: solution polymerized styrene-butadiene rubber, a styrene-butadiene-styrene block copolymer, a thermoplastic polyurethane elastomer, zinc oxide, stearic acid, sulfur, an accelerant, an anti-aging agent, carbon black, a hybrid flame-retardant composite material, a phosphate flame retardant, paraffin oil and an antistatic agent; the covering layer of the energy-saving and environment-friendly polyarylate fabric whole-core flame-retardant conveying belt prepared by the invention is compounded from white carbon black, expanded graphite, diethyl aluminum hypophosphite and dimethyl imidazole zinc, and is subjected to surface treatment through polyacrylamide; and then the styrene-butadiene-styrene block copolymer is used for carrying out macromolecular modification on the hybrid flame-retardant composite material, so that the prepared conveyor belt has excellent flame-retardant and antistatic properties, environment-friendly properties, low rolling resistance and mechanical properties.

The present disclosure provides storage stable solid compositions including a biopharmaceutical agent and a polyacrylamide-based copolymer. The inventors have demonstrated that particular polyacrylamide-based copolymers can be used as stabilizing excipients in lyophilized formulations of biopharmaceutical agents. Also provided are methods of reconstituting and using the compositions, including methods of administering the reconstituted composition to a human subject in need thereof via injection, e.g., subcutaneous injection.

The invention provides loofah sponge nanocellulose hydrogel and a preparation method thereof.The preparation method comprises the following steps that anhydrous citric acid, choline chloride and water are mixed to react, and a ternary eutectic solvent is obtained; dispersing loofah sponge purified cellulose in a ternary eutectic solvent, washing and filtering a product to be neutral, dispersing the product in water, and performing ultrasonic treatment to obtain loofah sponge nanocellulose turbid liquid; dissolving sodium lignin sulfonate and lithium chloride in a sodium hydroxide solution to obtain a precursor solution; mixing the loofah sponge nanocellulose suspension with water, polyacrylamide, ammonium persulfate and N, N-methylene bisacrylamide, pouring the precursor solution into the loofah sponge nanocellulose suspension, uniformly stirring the mixture, pouring the mixture into a mold, and sealing the mold; and forming to obtain the loofah sponge nanocellulose hydrogel. The invention also provides an application of the hydrogel. The hydrogel disclosed by the invention has excellent biocompatibility, mechanical property and conductivity, has a wide application prospect in the field of flexible electronics, and is simple in preparation process, low in cost, green and environment-friendly.

The present invention relates to a flexible iron aluminate cement-based supercapacitor and a preparation method thereof. The flexible iron aluminate cement-based supercapacitor is assembled with rGO / Ni as the positive electrode, rGO@α-Fe2O3 spindle / Ni as the negative electrode, and polyacrylamide-cement-emulsion-latex powder-water-KOH as the flexible cement-based solid electrolyte. Compared with the prior art, the flexible energy storage cement-based material, as a new type of building material integrating structure / function, realizes the integration of flexible lightweight design and functional technology. Its flexible characteristics can closely fit complex-shaped buildings and have good adaptability to special-shaped curved building structures. At the same time, a non-destructive construction process can also be adopted, and the energy storage function can be imparted to the existing structure by an external pasting method, so that the energy storage function can be imparted without structural reconstruction.

The invention belongs to the technical field of intelligent high polymer materials, and particularly relates to a preparation method of a quick temperature-sensitive response poly (N-isopropylacrylamide) (PNIPAM)-polyacrylamide (PAM) composite hydrogel. The method comprises the following steps: firstly, copolymerizing carboxymethyl cellulose and N-isopropylacrylamide to obtain a graft polymer, and then reacting the graft polymer with acrylamide to obtain the CMC-PNIPAM-PAM composite hydrogel. The preparation method is low in raw material price and simple and feasible in technological process; the prepared material is rapid in response to temperature change, and the hydrogel is rapidly and reversibly changed from transparent to opaque in the heating process. Besides, by changing the temperature condition in the hydrogel preparation process, the size stability of the hydrogel in the temperature response process can be changed, two kinds of hydrogel with large performance difference are obtained, potential application risks caused by performance failure and structure instability of a gel device in different application environments are avoided, and the application performance of the gel is further improved.

The invention provides a chitosan-based hydrogel optical fiber material as well as a preparation method and application thereof, and belongs to the technical field of composite materials. Chitosan is modified by methacrylic anhydride to obtain a matrix solution of the hydrogel optical fiber, the reaction performance of the chitosan is enhanced, the modified chitosan and acrylamide are mixed, the mixture is irradiated by ultraviolet light to obtain the hydrogel fiber, then the hydrogel fiber is coated with a polyacrylamide solution, the chitosan with a high refractive index is used as a fiber core, and the hydrogel optical fiber is prepared. Acrylamide with excellent mechanical property is used as a coating layer, the problem of large light loss caused by insufficient refractive index of most of hydrogel is effectively avoided, the optical performance of the hydrogel optical fiber is improved, the prepared chitosan-based hydrogel is used as an optical fiber material, the biocompatibility and biodegradability of a brain-computer interface can be improved, and the application prospect is wide. The preparation method is simple and easy to operate.

The invention discloses a composite water purifying agent based on polyaluminum ferric sulfate. The preparation process comprises the following steps: 1, reacting ferrous sulfate heptahydrate, aluminum sulfate, sodium chlorate, phosphoric acid and the like to prepare a polyaluminum ferric sulfate solution; 2, mixing the modified polyacrylamide solution with the polyaluminum ferric sulfate solution for reaction to obtain a composite system; and step 3, adding acidic ochre soil into the composite system to obtain the composite water purifying agent. The preparation method has the beneficial effects that a modified monomer is prepared through organic synthesis, and the modified monomer is copolymerized with monomers such as acrylamide to prepare modified polyacrylamide; then, the organic polymer is compounded with a polyaluminum ferric sulfate solution and acidic ochre soil, and an inorganic-organic-mineral ternary water purification system is constructed; the composite water purifying agent has the high-efficiency electricity neutralization capability of an inorganic flocculating agent, the bridging flocculation effect of organic macromolecules and the adsorption performance of minerals, and shows excellent flocculation and sedimentation effects and pollutant removal capability.

The invention belongs to the technical field of water treatment, and particularly relates to a preparation method and application of an organic / inorganic composite flocculant for swimming pool water treatment.The method comprises the steps that magnetic nanoparticles Fe3O4 and sodium silicate powder are mixed to prepare a magnetic polysilicic acid solution, chitosan and acrylamide of a certain mass are dissolved in a glacial acetic acid solution, and the magnetic polysilicic acid solution is prepared; and ammonium ceric nitrate is used as an initiator to prepare the chitosan-polyacrylamide flocculant. The prepared chitosan-polyacrylamide flocculant is stirred in a glacial acetic acid solution for 24 hours for pretreatment. The preparation method comprises the following steps: adding an Al2 (SO4) 3.18 H2O solution, a ZnSO4. 7H2O solution and a pretreated chitosan-polyacrylamide flocculating agent into a magnetic polysilicic acid solution according to a certain proportion, so as to prepare the Fe3O4-PSAZ-CS-AM composite flocculating agent. The method disclosed by the invention is simple in reaction operation, easy in reaction condition control, low in cost and high in turbidity removal and organic matter removal efficiency of the swimming pool water, and has relatively high popularization and application values.

A method of making an absorbent structure including mixing ultra-high molecular weight (“UHMW”) glyoxalated polyvinylamide adducts (“GPVM”) and / or high molecular weight (“BMW”), glyoxalated polyacrylamide and / or high cationic charge glyoxalated polyacrylamide (“GPAM”) copolymers and high molecular weight (“BMW”) anionic polyacrylamide (“APAM”) with the furnish during stock preparation of a wet laid papermaking process.