473 results about "Potassium persulfate" patented technology

A fireproof magnesium oxide board is prepared by mixing the following raw materials, the raw material names and weight parts are as follows: 80-100 parts of magnesium oxide; 20-30 parts of anhydrous magnesium chloride; 10-20 parts of modified expanded vermiculite foaming agent; 20-30 parts of aluminum silicate fiber; 5-10 parts of sawdust; 10-15 parts of fly ash; 8-12 parts of glass magnesium board crushed powder; 1.5-5 parts of non-woven fabric; 10-20 parts of water; wherein the modified expanded vermiculite is prepared by the following steps: (1) Vermiculite is incompletely expanded and calcined; (2) acrylic acid monomer, sodium hydroxide, acrylamide monomer, initiator potassium persulfate, crosslinking aid pentaerythritol polyglycidyl ether, incompletely expanded vermiculite, and water are taken, stirred evenly and ultrasonically dispersed to obtain a first reaction solution, which is placed in a reactor for reaction to obtain a gel material; (3) the gel material is preliminarily crushed and dried, and then further crushed in a ball mill to obtain a fire-resistant expanded vermiculite with water absorption performance.

The invention relates to an aluminum oxide CMP polishing solution for rough polishing of silicon carbide wafers and a polishing method of the aluminum oxide CMP polishing solution, and the aluminum oxide CMP polishing solution comprises the following components in percentage by weight: 2-10wt% of nano aluminum oxide abrasive; 0.2 to 2 wt.% of a dispersant; 0.001 to 0.01 wt% of a pH regulator; the concentration of the oxidizing agent is 1-5wt.%. By adopting the compound oxidant, potassium permanganate is utilized to oxidize a reduction product manganese dioxide on the surface of the silicon carbide wafer to activate potassium persulfate, so that a large amount of sulfate free radicals are generated in the polishing solution, the oxidability of the sulfate free radicals is extremely high, the polishing solution can be promoted to generate chain oxidation reaction, and the surface of the silicon carbide wafer is further oxidized; and an oxide layer with low hardness is formed on the surface of the silicon carbide and is finally removed under the mechanical action of the aluminum oxide abrasive, so that the ultra-smooth and damage-free surface of the silicon carbide wafer is formed. The surface roughness of the obtained optimal silicon carbide wafer is 0.125 nm, and the material removal rate is 3.5 [mu] m / h. Compared with an existing aluminum oxide polishing solution, the polishing solution has the advantage that the surface quality and the polishing efficiency of the silicon carbide wafer are remarkably improved.

The invention provides a flexible HP-ZIF-67 (at) Au surface enhanced Raman scattering substrate for multi-phase detection of volatile organic gas and pesticide residues, and a preparation method and application thereof, and belongs to the technical field of volatile organic gas and pesticide residue detection. The preparation method comprises the following steps: preparing a polystyrene microsphere template by taking polyvinylpyrrolidone, styrene and potassium persulfate as raw materials, then adding 2-methylimidazole and cobalt nitrate to obtain HP-ZIF-67 particles, dispersing the HP-ZIF-67 particles on an aluminum foil to obtain an HP-ZIF-67 substrate, and continuing to diffuse and deposit a gold nanoparticle layer to obtain the flexible HP-ZIF-67 (at) Au surface enhanced Raman scattering substrate. The flexible HP-ZIF-67 (at) Au surface enhanced Raman scattering substrate provided by the invention has the advantages of stable process, high sensitivity and multiphase detection, and a novel composite material is provided for volatile organic gas and pesticide residue detection.

The invention discloses a high-RAP-doping-amount cold-mixed asphalt regenerant, and particularly relates to the technical field of asphalt regenerant, the high-RAP-doping-amount cold-mixed asphalt regenerant comprises the following raw materials: hydrogenated extract oil, acetyl tributyl citrate, a low-temperature penetrant, pre-swelling SEBS master batch, a crosslinking catalyst and a microcapsule antioxidant. Molecular-level branched-chain alkyl sodium sulfonate can be wedged into aged asphalt microcracks at the temperature of 65 DEG C, lost light components are balanced and supplemented through hydrogenated extract oil, an SEBS micro-crosslinking network forms an in-situ reinforcement effect at the temperature of 90 DEG C, the triple regeneration effect of regenerated asphalt is achieved, and the service life of the regenerated asphalt is prolonged. Nano-zinc oxide is treated by a silane coupling agent and then is modified by using methyl methacrylate and potassium persulfate, so that the nano-zinc oxide is coated with polymethyl methacrylate, the compatibility of the microcapsule antioxidant and the recycled asphalt can be improved, and the anti-aging performance of the recycled asphalt is improved.

The invention provides transparent high-impact-resistance heat-resistant MBS (methyl methacrylate-butadiene-styrene) resin and a preparation method thereof, and relates to the field of high polymer material preparation methods, the transparent high-impact-resistance heat-resistant MBS resin is prepared from the following raw materials: water, ethanol, maleic anhydride, an emulsifier, MBS resin grafted latex, potassium persulfate and an antioxidant; the MBS resin grafted latex is prepared from the following raw materials: water, modified styrene-butadiene latex, sodium hydrogen sulfite, potassium persulfate, methyl methacrylate and styrene, the modified styrene-butadiene latex is prepared from the following raw materials: a pre-emulsion, glycidyl methacrylate, ammonium persulfate, divinyl benzene and potassium persulfate; the pre-emulsion is prepared from the following raw materials: water, an emulsifier, butadiene and styrene. The product is good in heat resistance and good in PVC modification effect, and the modified PVC composite material is high in light transmittance, high in cantilever beam impact strength and resistant to aging.

The invention relates to a process for recycling and regenerating a waste lithium iron phosphate positive electrode material by using a specific chelating agent. The method comprises the following steps: carrying out heat treatment on a waste lithium iron phosphate positive electrode material, putting separated waste lithium iron phosphate powder into a ball milling tank, adding organic acid and a chelating agent, and carrying out ball milling; after the ball milling is finished, adding hydrogen peroxide, uniformly stirring and mixing, adjusting the pH value to 2-3 by using nitric acid, and filtering to obtain a filter cake which is iron phosphate; adding saturated sodium carbonate into the filtrate, precipitating, and recovering lithium carbonate; putting the iron phosphate, the lithium carbonate, the iron source, the lithium source and the phosphorus source in the step S3 into a ball mill for ball milling, and performing high-temperature solid-phase sintering after ball milling to obtain a regenerated lithium iron phosphate material; the chelating agent disclosed by the invention is prepared from (9ci)-2-(2-propenyl)-1-cyclopentene-1-carboxylic acid, 2-mercaptobenzimidazole carboxylic acid, an ethylene boric anhydride pyridine complex and potassium persulfate. The regenerated lithium iron phosphate material prepared by the method has excellent electrochemical performance.

The invention relates to the technical field of solid waste treatment, in particular to a method for removing antibiotics and resistance genes in aerobic composting of chicken manure. Comprising the following steps: adding a composting auxiliary material into chicken manure to enable the carbon-nitrogen ratio to be (25-30): 1, and adjusting the initial moisture content to 55-65% to obtain an initial composting material; adding persulfate and zero-valent iron into the initial compost material, and uniformly mixing; loading the mixed material into a container for composting; during the composting period, stirring is performed regularly, and the aerobic composting time is 30-40 days. The method has the advantages that the persulfate advanced oxidation technology and the aerobic composting technology are combined, the potassium persulfate and the zero-valent iron are added to serve as the aerobic composting additive, the zero-valent iron can continuously activate the potassium persulfate, persulfate free radicals and hydroxyl free radicals are generated, and removal of antibiotics and antibiotic resistance genes is promoted; high-concentration oxytetracycline, sulfamethoxazole and ciprofloxacin in the chicken manure are effectively removed; and the abundance of antibiotic resistance genes with high risk levels is obviously reduced.

The invention relates to a low-temperature graphite negative electrode material and a preparation method thereof, and belongs to the technical field of high polymer materials. According to the prepared low-temperature graphite negative electrode material, firstly, the surface of graphite is pre-oxidized through potassium persulfate, phosphorus pentoxide and concentrated sulfuric acid, and then under the action of sodium nitrate, potassium permanganate and hydrogen peroxide, graphite oxide is prepared; then, ammonium molybdate hydrate and thioacetamide are used as a molybdenum source and a sulfur source, graphite oxide is used as a supporting material, a molybdenum disulfide-graphite compound is synthesized, and the conductivity and the cycling stability are improved; secondly, the surface of the negative electrode is coated with amorphous resin carbon / nickel oxide, so that the ion diffusion efficiency of the low-temperature graphite negative electrode material is enhanced, and the electrochemical lithium storage performance is improved in a low-temperature environment; and finally, the surface of the amorphous resin carbon / nickel oxide is coated with a layer of polythiophene film, so that the rate capability of the negative electrode material is improved due to large surface area and high pores.

The invention provides a modified chitosan flocculant for slime water treatment. The modified chitosan flocculant is prepared from the following raw materials: chitosan, dimethyl diallyl ammonium chloride, acrylamide, acetic acid and potassium persulfate. The invention also provides a preparation method of the modified chitosan flocculant for slime water treatment. The preparation method comprises the following steps: dissolving chitosan in a dilute acetic acid solution with the mass concentration of 60%, and stirring; adding acrylamide and dimethyl propyl chloride cyclic amine into the mixed solution, uniformly stirring, adding a potassium persulfate solution with the mass concentration of 4%, and introducing nitrogen for 20 minutes; then carrying out microwave reaction, and cooling to room temperature after the reaction is completed; adding absolute ethyl alcohol, centrifuging for 10 minutes, taking out, and continuously soaking in absolute ethyl alcohol for 12 hours, so as to obtain a final insoluble substance which is a graft polymer CS-g-ADM; and drying the polymer in a drying box at 105 DEG C until no weight loss occurs, and then grinding and storing. The flocculating agent disclosed by the invention has relatively good flocculability.

The invention discloses a biomass-inorganic-organic ternary composite flocculant and a preparation method and application thereof, and belongs to the field of coking wastewater treatment.The preparation method comprises the steps that chitosan serves as a substrate material, glutaraldehyde serves as a cross-linking agent, and polyferric sulfate (PFS) and chitosan are subjected to chemical cross-linking to generate an intermediate product PFS and chitosan composite particles; then potassium persulfate is used as an initiator, graft copolymerization of acrylamide and methacryloyloxyethyl trimethyl ammonium chloride is initiated through hydroxyl on the surface of PFS-chitosan, a cationic branched chain is introduced, and a final product is obtained. Through multi-component cooperation and structural design, the defects that a traditional flocculating agent is not thorough in demulsification, large in sludge amount, unstable in floc combination and the like in coking wastewater treatment are overcome, and the flocculating agent is particularly suitable for treating oil pollutants in coking wastewater.

The invention discloses a degradable polymeric flocculant and application thereof.The preparation method specifically comprises the following steps that sulfonated starch is dissolved in deionized water, chitosan composite powder is added, the mixture is heated and stirred until the chitosan composite powder is dissolved, acrylamide is added after ultrasonic dispersion, then N, N '-methylene bisacrylamide and potassium persulfate are added, the mixture is stirred until a gel state is formed, and the degradable polymeric flocculant is obtained; cutting the gel into small blocks, soaking the small blocks in distilled water for washing, and drying, crushing and sieving the washed gel to obtain the degradable polymeric flocculant. According to the preparation method, the flocculation capacity and the degradation capacity are improved by compounding synthesized organic polymer and natural polymer materials, the antibacterial capacity and the degradation performance are improved by compounding silver oxide, titanium oxide and graphene oxide, and the composite material is good in flocculation and sedimentation capacity, excellent in degradation performance and good in antibacterial capacity.

The invention discloses a method for promoting anaerobic fermentation phosphorus release and short-chain fatty acid production of excess sludge, relates to the technical field of sludge treatment and resource utilization, and particularly relates to a method for promoting anaerobic fermentation phosphorus release and short-chain fatty acid production of excess sludge by utilizing thermal activation potassium persulfate (PMS, K2S2O8). The method comprises the following steps: mixing PMS with excess sludge, putting the mixture into a sludge pyrolysis device, carrying out thermal activation at 80 DEG C for 2 hours, then carrying out anaerobic fermentation in a sealed reactor, and filtering the fermented sludge mixed solution to obtain a phosphorus-rich supernatant. According to the method, the residual sludge is pretreated by utilizing the thermal activation PMS, so that phosphorus in the residual sludge can be enriched from a solid phase to a liquid phase, and the release efficiency of the phosphorus in the residual sludge is improved; meanwhile, organic matters in the excess sludge are decomposed and released into supernate along with the rupture of microbial cells in the excess sludge in the pretreatment process, so that the microbial acid production fermentation rate in the anaerobic fermentation process is increased, and the resource and reduction utilization of the sludge is facilitated.

The invention provides a pharmaceutical wastewater treatment process. The pharmaceutical wastewater treatment process comprises the following steps: A1, pretreatment, A2, adsorption treatment, A3, oxidation treatment and A4, filtration treatment. In the step A2, a composite adsorbent comprising the following raw materials: attapulgite, activated carbon, carbon nanotubes, 4-carboxyphenylboronic acid, polyethyleneimine, sodium dithiocarbamate, epoxy resin E-44, deionized water and modified nano zero-valent iron is used, and self-repairing is realized through dynamic chemical bonds such as boric acid ester bonds, imine bonds and thiol-disulfide bonds; the adsorbent can be self-repaired during microscopic damage, so that the service life is prolonged, and relatively high adsorption capacity is kept. In the step A3, a gel microsphere oxidant comprising the following raw materials: hydrogen peroxide, potassium persulfate, copper-iron sulfide, nitrogen-doped carbon quantum dots, sodium alginate powder, sodium polyacrylate and a phosphate buffer solution is used, and efficient degradation is realized through a synergistic mechanism of free radical oxidation, non-free radical oxidation and photocatalysis.

The invention belongs to the technical field of biological medicines, and particularly relates to sodium pyruvate sustained-release gel nanoparticles based on redox response as well as a preparation method and application of the sodium pyruvate sustained-release gel nanoparticles. The preparation method comprises the following steps: adding modified gellan gum containing sulfydryl and catechol groups, phenylboronic acid modified gellan gum and sodium pyruvate into water to obtain a mixed solution; under the protection of inert gas, divalent metal salt and potassium persulfate are added into the mixed solution, stirring is performed for 3-5 h, after the reaction is finished, centrifugation is performed, precipitates are collected, washed and dried, and the composite material is obtained. Experimental results show that the sodium pyruvate sustained-release gel nanoparticles prepared by the invention can realize controlled release of drugs, reduce toxic and side effects caused by burst release of the drugs, improve the curative effect of the drugs and improve the bioavailability.

The invention provides an anti-stain inducer as well as a preparation method and a use method thereof. According to the anti-waterlogging inducer, 0.01-0.02 g of potassium persulfate is mixed with a corresponding dosage of a synergistic compound agent in 1 L of an earthworm enzyme solution, a proper amount of ROS is induced in plants by spraying of potassium persulfate, ROS is used as a stress resistance signal, a crop plant defense reaction is activated, a stress memory is formed, and the anti-waterlogging inducer has a good anti-waterlogging effect. Therefore, the stress response of the plant can be quickly activated in a subsequent stress environment, and the stress resistance of the plant is improved. The anti-stain inducer provided by the invention is low in cost and easy for large-scale production. When the wheat waterlogging stress occurs, the wheat waterlogging resistance can be effectively improved by spraying the wheat waterlogging stress resisting agent before the wheat is subjected to waterlogging stress in a simple and convenient use mode easy for farmers to operate, so that the yield and the quality of the wheat are remarkably improved. The inducer provided by the invention avoids the problem that the existing remedial conditioning agent is difficult to apply in time under the condition of heavy rainfall, and provides a new solution for agricultural disaster resistance and reduction.

The invention discloses a lignocellulose modified ammonium polyphosphate hydrogel slow-release fertilizer and a preparation method thereof, and belongs to the technical field of slow-release fertilizers, the preparation method comprises the following steps: adding biomass into an alkaline solution for heating treatment, adding biomass into an acidic solution for heating treatment, and collecting a reaction solution; adding urea into the reaction solution, reacting under a heating condition to prepare an ammonium polyphosphate-lignocellulose mixture, grinding the ammonium polyphosphate-lignocellulose mixture into powder, and then adding the powder into a potassium persulfate solution to prepare a suspension; the preparation method comprises the following steps: adding potassium hydroxide, acrylic acid, acrylamide, urea and MBA into water under heating and nitrogen protection to obtain a mixed solution; mixing the suspension liquid with the mixed solution, heating and reacting under nitrogen and stirring conditions, dicing and drying to prepare the slow-release fertilizer which has good water and fertilizer retention capacity, relatively strong slow-release capacity, soil structure improvement capacity and heavy metal adsorption potential, and effectively solves the problems of poor water retention capacity and poor soil improvement effect in the prior art.

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 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 a high-performance additive and a steel-slag-doped cementing material applied to the high-performance additive, and relates to the technical field of cementing materials. The high-performance additive is prepared from the following components in parts by weight: 0.5 to 1 part of calcium citrate, 1.5 to 2 parts of modified sodium alginate, 4 to 6 parts of modified diatomite and 0.01 to 0.03 part of potassium persulfate. The modified sodium alginate is prepared from the following raw materials: oxidized sodium alginate, 4-hydroxycinnamamide, aminated graphene and sodium sulfanilate. The raw materials of the modified diatomite comprise alkali lignin and aminated diatomite. The invention provides the high-performance additive which is applied to the binding material doped with the steel slag, so that the problems of low activity of the steel slag and single function of the traditional additive are solved, the comprehensive improvement of the performance of the binding material is also realized, and the binding material has environmental protection property and economic benefit.

The invention discloses an electrochemical test performed by preparing a novel electrochemical luminescence material and application of the electrochemical luminescence material to an electrochemical luminescence sensor. The invention designs an electrochemical luminescence sensor for detecting carbaryl based on a rare earth metal Eu co-reaction-free promoter complex illuminant. Specifically, the electrochemical luminescence sensor is prepared by taking a complex of rare earth metal europium as a luminescent material and potassium persulfate as a co-reactant. The sensor shows an excellent development prospect in the aspect of carbaryl detection.

The invention discloses a preparation method and application of a pyrenyl covalent organic framework material containing pyridine nitrogen. The material has good application in the aspect of activating potassium monopersulfate (PMS) to degrade organic pollutants. The preparation method of the pyrenyl covalent organic framework material containing pyridine nitrogen comprises the following steps: taking 1, 3, 6, 8-tetra-(p-aminophenyl)-pyrene and 2, 6-pyridinedicarboxaldehyde as synthesis precursors, and carrying out Schiff base reaction to obtain the pyrenyl covalent organic framework material containing pyridine nitrogen. By introducing a pyridine nitrogen structure, the PMS activation capacity is remarkably improved, the efficient catalytic degradation capacity on bisphenol A is shown, meanwhile, the material is stable in property, does not generate secondary pollution, can be recycled, and has important application value and application prospects in the aspect of organic pollutant degradation.

The invention relates to the technical field of waste drilling fluid treatment, and discloses a modifier for treating water-based drilling waste and a preparation method thereof.The modifier is prepared from, by weight, 30-40 parts of potassium persulfate, 10-25 parts of ferric trichloride, 20-40 parts of quaternary ammonium cationic polymer and 10-20 parts of magnetized modified attapulgite clay. According to the modifier for treating the water-based drilling waste, through the synergistic effect of all the components, an oxidation-catalysis-flocculation-magnetic separation four-stage synergistic treatment process is formed, the problem that gel breaking is not thorough in the water-based drilling waste treatment process is solved, the content of metal ions in a liquid phase after solid-liquid separation is reduced, and the water-based drilling waste treatment effect is improved. The water distribution requirement of the drilling fluid can be met under the condition that the liquid phase does not need to be further treated, the treatment process is simplified, and the cost is reduced.

The invention discloses a super absorbent material and side leakage prevention paper diapers, and belongs to the field of hygienic product materials. Comprising the following steps: cooling acrylic acid in an ice-water bath, and partially neutralizing the acrylic acid by using a sodium hydroxide solution; mixing potato starch with deionized water, and gelatinizing at high temperature to obtain gelatinized starch; mixing gelatinized starch, neutralized acrylic acid, potassium persulfate and deionized water; uniformly stirring under the protection of nitrogen, heating and carrying out graft copolymerization reaction to obtain a copolymer; adding modified silicon dioxide into the copolymer, and uniformly dispersing; then adding an oxetane compound, and carrying out a cross-linking reaction at a high temperature to obtain a super absorbent material; wherein the modified silicon dioxide has a porous structure, and nano-silver particles are loaded in pore walls. The super absorbent material disclosed by the invention effectively breaks through the gel blocking effect of the traditional high-molecular water-absorbent resin, has ultrahigh liquid absorption capacity and water locking capacity, and realizes slow-release long-acting bacteriostasis at the same time.

The invention relates to the field of planting soil, and discloses modified marine facies sludge-based planting soil and a preparation method thereof.The modified marine facies sludge-based planting soil is prepared by compounding marine facies sludge and a modifier according to the mass ratio of 5: 0.4-1; the modifier comprises an adsorption additive, modified polyvinyl alcohol fiber, fly ash, potassium fulvate, desulfurized gypsum and an organic fertilizer; the adsorption additive is prepared by taking straw cellulose and sodium alginate as a network framework and taking expanded vermiculite as an adsorption function unit through a metal ion cross-linking method; the modified polyvinyl alcohol fiber is prepared by oxidizing polyvinyl alcohol fiber with potassium persulfate and silver nitrate, reacting with triethylene tetramine and hydrochloric acid to generate ammonium salinized polyvinyl alcohol fiber, and further reacting with calcium bentonite acidified by hydrochloric acid. Wherein the adsorption additive and the modified polyvinyl alcohol fiber are added, so that the adsorption performance of the planting soil and the stability of soil aggregate are improved.

The invention discloses a preparation method and application of a polymer lithium-conducting glue solution and a solid-state lithium battery, and the preparation method comprises the following steps: adding a lithium salt and a polymer monomer into a solvent according to a mass ratio of (5-10): (3-5) to form a mixed solution; adding an initiator, uniformly stirring to obtain a mixture glue solution, and carrying out heat treatment to obtain a polymer lithium-conducting glue solution; the initiator is selected from one or a mixture of two or more of azodiisobutyronitrile, benzoyl peroxide, potassium persulfate and ammonium persulfate in any proportion; the interface material which is formed in situ in the battery and has excellent mechanical property and lithium conducting capacity is used for reducing the operation pressure of the solid-state battery and improving the electrochemical performance of the solid-state battery.

The invention provides a multi-layer composite fiber core and a preparation method thereof, and belongs to the technical field of disposable hygienic products. The preparation process comprises the following steps: preparing mesoporous silica nanoparticles; preparing composite super absorbent resin; preparing a bacteriostatic additive; preparing antibacterial and deodorant viscose fibers; preparing an antibacterial treatment solution; preparing an antibacterial treatment fiber web; and preparing the multi-layer composite fiber core body. According to the preparation method, carboxymethyl corn straw cellulose is mixed with acrylic acid, acrylamide and mesoporous silica nanoparticles, 2-acrylamide-2-methylpropanesulfonic acid is added, and reaction is performed under initiation of potassium persulfate, so that the water absorption rate of the prepared composite water-absorbent resin can be remarkably improved, multiple protection mechanisms can be formed, and the water absorption rate of the composite water-absorbent resin is improved. Interference of salt ions is prevented, so that the salt resistance of the composite water-absorbent resin can be effectively improved, and the water absorption rate of the composite water-absorbent resin to artificial blood / urine is further improved.

The invention relates to the technical field of pharmaceutical preparations, and discloses a mild photo-thermal microneedle patch and a preparation method and application thereof, and the mild photo-thermal microneedle patch comprises a substrate and needle tips arranged on the substrate in an array; the substrate is prepared from the following raw materials in parts by weight: 400 to 500 parts of N-isopropylacrylamide, 30.5 to 40.5 parts of acrylamide, 4 to 5 parts of polydopamine nanoparticles, 10 to 30 parts of N, N-methylene bisacrylamide, 100 to 200 parts of sodium alginate, 6.2 to 9.3 parts of tetramethylethylenediamine and 8 to 12 parts of potassium persulfate; the needle tip is prepared from the following raw materials in parts by weight: 0.1 to 0.5 part of methacrylated gelatin, 0.2 to 0.6 part of deferoxamine mesylate, 0.8 to 1.2 parts of a photoinitiator and 33.6 to 56 parts of polyethylene glycol diacrylate. The mild photo-thermal microneedle patch can realize photo-thermal sterilization under near-infrared irradiation, and also can promote skin repair and regeneration.

The invention discloses a core-shell structure P (MMA-MBA) copolymer heat-storage phase-change microcapsule, the microstructure is of a spherical structure, the core-shell structure is adopted, the core structure is hexadecane, the shell structure is a methyl methacrylate (MMA) and N, N-methylene bisacrylamide (MBA) copolymer, the emulsifier is lauryl sodium sulfate (SDS), the initiator is potassium persulfate, and the pH value of the core-shell structure P (MMA-MBA) copolymer heat-storage phase-change microcapsule is 7-8. And the coating efficiency is 70-75%. The preparation method comprises the following steps: 1, preparing an oil phase and a water phase; and 2, polymerization reaction of the microcapsule. A phase change cement material based on a core-shell structure P (MMA-MBA) copolymer heat storage phase change microcapsule is prepared by compounding the P (MMA-MBA) copolymer heat storage phase change microcapsule and a cement matrix, and has hydrophobicity; obvious weightlessness exists in two times.

The invention relates to a preparation method and application of a green and efficient polyfunctional group modified environment-friendly scale inhibitor capable of effectively inhibiting calcium sulfate scale. According to the scale inhibitor, starch serves as a raw material, potassium persulfate serves as an initiator, glycidyl methacrylate and acrylic acid are introduced through a grafting reaction to serve as grafting monomers, and the modified scale inhibitor with multiple functions is formed. A grafted chain containing carboxyl, ester group and epoxy group can be introduced to a polysaccharide chain, so that the scale inhibitor is endowed with excellent chelation, dispersion and lattice distortion properties, and the formation and growth of scale bodies can be effectively inhibited. The prepared scale inhibitor can effectively inhibit generation of calcium sulfate scale in a static water body, has a remarkable application effect in a reverse osmosis system, and effectively relieves the problem of reduction of membrane flux, so that the stability of a water treatment system is improved. The water treatment efficiency is improved, the requirement for environmental friendliness is met, and a new strategy is provided for calcium sulfate scale control.

The preparation method comprises the following steps: mixing a gelatin solution and sodium lignin sulfonate to obtain a mixed solution, heating the mixed solution to a set temperature, sequentially adding a polymeric monomer solution, potassium persulfate and N, N-dimethylformamide, and carrying out a reaction at a set temperature to obtain the lignin-based polymer hydrogel. Polymerizing with N, N-methylene bisacrylamide, and fully mixing to obtain the lignin-based polymer hydrogel after a gel state is formed; sodium lignin sulfonate and gelatin are adopted as bio-based raw materials, and compared with traditional lignin-based high-molecular hydrogel depending on petrochemical products, the lignin-based high-molecular hydrogel has the remarkable environment-friendly characteristic. The materials obtained from natural sources not only ensure the biodegradability of the lignin-based polymer hydrogel, but also can be naturally decomposed in soil application, so that the potential negative influence on an ecological system is greatly reduced. By using the lignin-based polymer hydrogel, secondary pollution in the environment is avoided, and the innovation potential of application of biological materials in environmental engineering and agricultural science and technology is shown.