617 results about "Sodium polyacrylate" patented technology

The invention discloses a PA6 nylon composite material for a high-temperature-resistant filter screen and a preparation method of the PA6 nylon composite material, and relates to the technical field of composite materials. The invention discloses a PA6 nylon composite material for a high-temperature-resistant filter screen. The nylon material is prepared from the following raw materials in parts by weight: 60 to 80 parts of modified PA6 nylon, 10 to 20 parts of modified glass fiber, 2 to 5 parts of montmorillonite, 0.3 to 0.8 part of antioxidant 1010, 0.2 to 0.6 part of stearic acid, 0.5 to 1.0 part of ethoxylated fatty amine, 1 to 3 parts of nano titanium dioxide, 1 to 3 parts of polytetrafluoroethylene micro powder, 3 to 8 parts of aluminum hydroxide, 0.5 to 1.5 parts of chitosan, 1 to 3 parts of hyperbranched polyamide and 0.5 to 1.5 parts of urea-formaldehyde resin coated epoxy resin microcapsules. And 0.3 to 0.8 part of sodium polyacrylate. The PA6 nylon composite material for the high-temperature-resistant filter screen has remarkable advantages. The material disclosed by the invention is high in mechanical property, good in thermal stability and stable in size at high temperature; the self-cleaning, antibacterial and antistatic functions are realized, and the filtering efficiency is high; chemical corrosion resistance, wear resistance and low water absorption are achieved; part of the raw materials can be recycled, the environmental protection concept is met, and the use requirement of the high-temperature-resistant filter screen in a complex environment can be met.

The invention relates to the technical field of electric wires and cables, discloses a high-elasticity waterproof cable based on blending of water-blocking powder and an elastomer, and aims to solve the problems that in the prior art, during long-term dynamic service, interlayer separation is easily caused by interfacial stress superposition, so that elasticity attenuation and waterproof barrier damage are caused, and the service life is affected. According to the invention, the sodium polyacrylate water-blocking powder is subjected to composite modification and is blended with an elastomer matrix, modified nano silicon dioxide is matched for dispersion, an inner and outer layer gradient insulation structure is designed, and ultrasonic dispersion, nitrogen protection steam cross-linking and other processes are combined; the cable is sequentially provided with the conductor layer, the conductor shielding layer, the gradient insulation layer, the insulation shielding layer and the sheath layer from inside to outside, interface stress concentration is reduced, interlayer combination stability is enhanced, and the cable can still keep excellent elastic recovery capability and waterproof barrier integrity under high-frequency torsion and repeated dry-wet cycles.

The invention relates to the technical field of medical dressings, in particular to a perianal drug dressing of a multi-layer flow guide composite fabric and a preparation method and application of the perianal drug dressing of the multi-layer flow guide composite fabric. The perianal drug dressing is of a four-layer structure, a wet tissue adhesion layer is made of polydopamine modified chitosan / oxidized hyaluronic acid hydrogel, and wet-state adhesion is achieved; the drug sustained-release layer is used for dispersing mesoporous silica loaded with ciprofloxacin hydrochloride / defensin and chitosan microspheres loaded with epidermal growth factors / lonicera japonica into a polycaprolactone fiber membrane to achieve synergistic antibacterial and healing promotion; the directional flow guide layer is of a gradient wettability sandwich structure with a bionic micro-channel, and one-way rapid drainage can be achieved; the high-absorption outer layer is carboxymethyl cellulose / sodium polyacrylate composite sponge, liquid is locked efficiently, the wound surface is kept dry and comfortable, the clinical problem in perianal infection wound treatment can be effectively solved, and the treatment effect and the patient comfort are remarkably improved.

The invention relates to the technical field of soil remediation, in particular to a soil ecological remediation agent based on coal gangue-fly ash and a preparation method of the soil ecological remediation agent. The soil ecological restoration agent comprises the following components in parts by weight: 40-50 parts of coal gangue-fly ash mixed powder, 6-12 parts of a microbial agent, 15-20 parts of humic acid, 6-12 parts of sodium polyacrylate, 8-12 parts of straw carbon, 20-25 parts of bentonite and 4-6 parts of aluminum sulfate. The soil ecological restoration agent can supplement trace elements into soil, meanwhile, the coal gangue-fly ash can adsorb heavy metals in the soil so as to fix the heavy metals, the microbial agent can be loaded on the surface of the coal gangue-fly ash, the heavy metals adsorbed on the coal gangue-fly ash are precipitated through the microbial agent, and the heavy metals adsorbed on the coal gangue-fly ash can be fixed. The concentration of heavy metal ions in the soil is reduced.

The invention relates to the technical field of biological medicine, and particularly discloses an atopic dermatitis treatment medicine and a preparation method and application thereof.The preparation method comprises the steps that sodium alginate, sodium polyacrylate and water are mixed and then subjected to a swelling reaction, and a colloidal solution with the viscosity larger than or equal to 5000 cP is formed; mixing upatinib, a preservative, glycerol and azone to obtain a raw material phase; and mixing the colloidal solution with the raw materials, and homogenizing to obtain the atopic dermatitis treatment medicine. Through swelling reaction of sodium alginate and sodium polyacrylate, the viscosity of a colloidal solution is remarkably improved through molecular chain entanglement, charge repulsion and water absorption synergistic effects of sodium alginate and sodium polyacrylate; through compounding of all the components, the transdermal efficiency of the medicine is improved, the irritation of the medicine is reduced, and meanwhile, the inhibition efficiency on atopic dermatitis inflammatory factors is also improved.

The invention provides a loess slope unmanned aerial vehicle ecological restoration method and system based on water-retaining agent blending, and the method comprises the steps: preparing a composite water-retaining agent from sodium polyacrylate and biochar, coating grass seeds with a double-layer coating, and mixing the composite water-retaining agent, the coated grass seeds and a fertilizer to form a mixed matrix; a bio-based binder is sown in a to-be-sown area of a wind power plant slope and a photovoltaic power station, and a pre-sown area is obtained; when the pre-sowing area is a side slope, sowing the mixed matrix in a side slope mode of an unmanned aerial vehicle self-adaptive sowing mechanism; when the pre-sowing area is the flat ground, sowing the mixed matrix in a flat ground mode of an unmanned aerial vehicle self-adaptive sowing mechanism; after the sowing of the mixed matrix is completed, the microbial agent is additionally sprayed, the stress resistance of plants is improved, and the grass seed sowing success rate is effectively improved through the water retention of the grass seeds and the sowing control of the grass seeds according to conditions, so that the ecological restoration of the wind power plant land is facilitated.

The invention discloses a saline-alkali soil improvement and disease resistance double-effect controlled release fertilizer and a preparation method thereof. The fertilizer comprises 18-22% of biochar, 12-18% of furfural residues, 8-12% of cow dung compost and 6-10% of potassium humate. 5-7% of aluminum sulfate, 4-6% of sulfur and 3-5% of zeolite; the microbial inoculum comprises the following components in percentage by weight: 1.5 to 2.5 percent of saline-alkaline bacillus, 0.8 to 1.2 percent of bacillus subtilis and 0.8 to 1.2 percent 8-12% of a sodium polyacrylate coating, 4-6% of a sulfur coating and 1-3% of polyglutamic acid; 0.8 to 1.2 percent of humic acid chelated iron, 0.8 to 1.2 percent of algal polysaccharide and 0.8 to 1.2 percent of urease inhibitor; 0.8 to 1.2 percent of zinc sulfate, 0.5 to 1.0 percent of manganese sulfate and 0.5 to 1.0 percent of borax. The fertilizer can reduce the pH and conductivity of soil, increase the organic matter content of the soil and effectively improve the physicochemical properties of the soil, meanwhile, by adding the microbial agent, the disease resistance of crops can be effectively improved, the morbidity and disease index of the crops can be reduced, and nutrient release of the fertilizer has a sustained and controlled release characteristic; the initial release rate and the cumulative release rate of nitrogen are both lower than those of common chemical fertilizers, and the cumulative release rate of nitrogen is moderate within 60 days, so that the nutrient requirements of crops in different growth stages can be met.

The invention relates to the technical field of reverse osmosis membrane maintenance, in particular to a cleaning scale inhibitor special for a reverse osmosis membrane and application of the cleaning scale inhibitor. The cleaning scale inhibitor provided by the invention comprises an agent A, an agent B and an agent C, the agent A comprises the following components in percentage by mass: 10-20% of organic phosphonic acid, 10-20% of polycarboxylic acid polymer, 5-10% of sulfamic acid, 3-8% of sodium gluconate and the balance of water; the agent B comprises 8-15% of an isothiazolinone bactericide, 5-10% of a nonionic surfactant, 3-8% of a chlorine bactericide, 2-5% of sodium dodecyl benzene sulfonate and the balance of water; and the agent C comprises 10-20% of sodium polyacrylate, 8-15% of sodium hexametaphosphate, 5-10% of citric acid, 3-8% of silicate and the balance of water. The cleaning scale inhibitor provided by the invention has an efficient cleaning effect on various pollutants, is environment-friendly, and does not cause chemical damage to a reverse osmosis membrane.

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 relates to the technical field of functional coatings of medical instruments, in particular to a temperature-sensitive response type sodium polyacrylate catheter leakage-proof coating, a preparation method and application thereof, and the coating is of a three-layer composite structure. And the bottom bonding layer adopts a polydopamine modified silane coupling agent system, contains silver nanoparticles, has the thickness of 5-15 microns, and ensures strong bonding and antibiosis of the substrate. The middle functional layer is a three-dimensional cross-linking degree gradient interpenetrating network polymer, is composed of a plurality of monomers and nano materials, and is 50-100 [mu] m in thickness, the cross-linking degree of the middle functional layer is gradually increased from inside to outside, gradient transition of mechanical properties is achieved, the outer protective layer is composed of a copolymer, is 3-8 [mu] m in thickness, and provides excellent anti-fouling and biocompatibility. The coating is endowed with strong adhesive force, gradient mechanical property and surface stability, the sodium polyacrylate component absorbs water and expands in urine to form sealing, and the expansion degree of the sodium polyacrylate component is regulated and controlled by the pH value and ionic strength of the urine.

The invention relates to the technical field of power cables, in particular to a cross-linked polyethylene insulated power cable wrapped by a high-water-resistance buffer layer and a preparation method of the cross-linked polyethylene insulated power cable wrapped by the high-water-resistance buffer layer, and the cross-linked polyethylene insulated power cable is prepared from the following raw materials in parts by weight: 100 parts of ethylene-vinyl acetate copolymer; 15 to 25 parts of conductive carbon black; 20 to 30 parts of sodium polyacrylate; and 10 to 15 parts of nano montmorillonite. Through the high-water-resistance buffer layer and innovative process design, the problems existing in a traditional cable are solved, and the water-resistance layer effectively blocks a water permeation path through composite water absorption and a nano barrier; nitrogen doping and dispersion optimization of conductive carbon black ensure the stability of resistivity; a plasma interface activation and microcapsule cross-linking technology improves interlayer bonding force and cross-linking uniformity, gradient degassing and low-temperature cross-linking are adopted in the preparation process, the production cycle is shortened, energy consumption is reduced, meanwhile, material degradation is avoided, the cable has high water resistance and long service life, and reliability and safety of power grid operation are remarkably improved.

The invention relates to the technical field of building materials, in particular to a high-elasticity polyurethane-asphalt composite road crack repair material and a preparation method thereof, and the high-elasticity polyurethane-asphalt composite road crack repair material comprises the following raw materials: an asphalt-based material, functional modified polyurethane, a polyether-polyolefin block copolymer, functional rubber, 2, 6-di-tert-butyl-4-methylphenol and sodium polyacrylate. According to the invention, a lipophilic functional group is introduced into a molecular chain of the functionalized modified polyurethane, so that the functionalized modified polyurethane can interact with alkyl in asphalt to form a more stable synergistic network structure, and the phase separation phenomenon of the polyurethane and the asphalt is effectively reduced; the modified polyurethane not only improves the elasticity, flexibility, temperature resistance and crack resistance of the composite material, but also optimizes the processability of the material, enhances the interface bonding force, and further improves the repair effect and the road durability.

The invention discloses an inorganic copolymer anticorrosive paint and a preparation method thereof, and relates to the technical field of paints. The invention discloses inorganic copolymer anticorrosive paint. The coating is prepared from the following raw materials in parts by weight: 20 to 30 parts of silica sol, 8 to 15 parts of sodium hydroxide, 30 to 45 parts of metakaolin, 8 to 20 parts of quartz sand, 15 to 25 parts of water, 0.3 to 2 parts of sodium polyacrylate, 0.2 to 3 parts of polydimethylsiloxane emulsion, 5 to 12 parts of modified nano titanium dioxide, 6 to 10 parts of modified epoxy resin, 10 to 25 parts of hydroxyethyl methylacrylate, 5 to 10 parts of zinc phosphate, 3 to 8 parts of aluminum triphosphate and 2 to 6 parts of iron oxide red. The raw materials of the inorganic copolymer anticorrosive paint are scientifically proportioned, and the anticorrosive performance is enhanced through the modified nano titanium dioxide and the epoxy resin. Material uniformity is ensured through step-by-step feeding and ultrasonic dispersion in preparation, and stability is improved through vacuum defoaming and nitrogen protection. The components such as the silica sol and the zinc phosphate have a synergistic effect to form a compact coating, and the coating is high in corrosion resistance, good in constructability and suitable for various scenes.

The invention discloses a solid ultrasonic gel patch as well as a preparation method and application thereof, and belongs to the technical field of medical chemistry. The solid ultrasonic gel patch is prepared from an acrylamide monomer, polyvinyl alcohol, sodium polyacrylate, sodium carboxymethyl cellulose, nano silicon dioxide, propylene glycol, glycerol, acrylic acid, triethanolamine, a cross-linking agent, an initiator and water according to a specific ratio. The prepared solid ultrasonic gel patch is highly matched with human soft tissue in acoustic impedance (about 1.62-1.63 * 10 < 6 > Pa.s / m), low in acoustic attenuation coefficient (less than or equal to 0.034 dB / (cm.MHz)), moderate in skin adhesion, excellent in flexibility and moisture retention, capable of solving the problems that a traditional ultrasonic coupling agent is inconvenient to use, easy to dry, poor in experience and the like, and suitable for acoustic wave conduction in ultrasonic examination and treatment.

The invention discloses a collateral-dredging and pain-relieving gel plaster and a preparation method thereof. The collateral dredging and pain relieving ointment is prepared from the following raw materials in percentage by mass: camphor, borneol, menthol, absolute ethyl alcohol, collateral dredging and pain relieving volatile oil, a surfactant, collateral dredging and pain relieving extract, tartaric acid, purified water, partially neutralized sodium polyacrylate, a cross-linking agent, an adhesive, glycerol, EDTA-2Na (Ethylene Diamine Tetraacetic Acid) and a filling agent. The plaster disclosed by the invention is high in application comfort, breathable, free from aching feeling after being uncovered, free from residue on skin and not sticky when being in contact with sweat; the use of an organic solvent is basically avoided in the production process; the matrix contains components such as water and glycerol, has the effects of moistening the skin and promoting skin hydration, and is free of irritation and sensitization to the skin; repeated uncovering and pasting can be achieved, and the viscosity influence is small.

The invention discloses an engineering residue soil improvement matrix and application thereof, the engineering residue soil improvement matrix comprises a base layer and a planting layer, the base layer comprises 50-70 wt% of engineering residue soil, 10-15 wt% of humus soil, 6-8 wt% of a fiber material, 3-5 wt% of a slow release fertilizer, 1-2 wt% of sulfur powder, 2-4 wt% of sodium polyacrylate, 3-5 wt% of polyacrylamide, 2-4 wt% of sodium hydroxide, and 3-4 wt% of a straw decomposition agent; the planting layer comprises 25 to 50 wt% of engineering residue soil, 20 to 30 wt% of peat soil, 4 to 6 wt% of compost, 6 to 8 wt% of a fiber material, 3 to 5 wt% of a slow release fertilizer, 1 to 2 wt% of sodium polyacrylate, 1 to 2 wt% of sodium hydroxide, 3 to 4 wt% of straw biochar, 3 to 4 wt% of a straw decomposition agent, 2 to 4 wt% of zeolite, 3 to 5 wt% of desulfurized gypsum, 1 to 2 wt% of nitrogen-fixing bacteria and 1.5 to 3 wt% of plant seeds. On the basis of a thick-layer base material spraying slope protection technology, spray-seeding materials are improved, waste muck is recycled, and land occupation and water and soil pollution caused by traditional muck landfill or stacking are avoided.

The invention provides a hydrogel fire extinguishing additive, a preparation method thereof and a fire extinguishing agent. The hydrogel fire extinguishing additive comprises the following raw materials in parts by mass: 1-3 parts of a gelatinizing agent, 1-4 parts of a thickening agent, 1-3 parts of a stabilizer, 2-5 parts of a cross-linking agent, 1-3 parts of a surfactant, 2-6 parts of a phosphorus flame retardant and 3-5 parts of an antifreeze agent. The gelatinizing agent is selected from one or more of methyl cellulose, hydroxypropyl methyl cellulose and hydroxyethyl cellulose; the thickening agent is selected from one or more of sodium carboxymethyl cellulose, konjac glucomannan, sodium alginate, sodium polyacrylate and xanthan gum; the cross-linking agent is selected from one or more of calcium chloride, magnesium sulfate, calcium sulfate, magnesium chloride, potassium chloride and sodium nitrate. The temperature and pH double-response hydrogel fire extinguishing agent provided by the invention has the characteristics of quick response capability, high-temperature stability, good environmental adaptability, safety and environmental protection, and can be well used for efficient extinguishing and continuous cooling control of a lithium ion battery fire.

Rapid development of wearable portable devices urgently requires high performance flexible supercapacitors and batteries. As a core component of a flexible energy storage device, hydrogel electrolyte has aroused wide attention. According to the invention, the PBAx composite hydrogel (x represents the PVA content, and the values are 0, 0.5, 1 and 1.5) is prepared through chain crosslinking of sodium polyacrylate (PANa), polyvinyl alcohol (PVA) and bacterial cellulose (BC). The PVA component can effectively regulate and control intramolecular crosslinking among PANa molecular chains through hydrogen-bond interaction, so that the optimized PBA0.5 hydrogel forms a porous structure, the structure shows remarkably enhanced water holding capacity and mechanical strength, and the ultimate compressive strength reaches 258.4 kPa. By utilizing the ionic conductivity characteristic of 4.607 S m <-1 > of the material, the specific capacity of a basic zinc battery assembled by the material reaches 171.3 mAh g <-1 >, and the material shows excellent rate capability. The hydrogel electrolyte can effectively protect the zinc negative electrode and guarantee the cycling stability of the battery. In addition, due to the excellent anti-freezing performance of the PBA0.5 hydrogel, the specific capacity of the battery in a low-temperature environment of-40 DEG C can still be kept at 83.1 mAh g <-1 >.

The application discloses a magnesium phosphate-based cement grouting material and a preparation method and application thereof. The raw materials of the magnesium phosphate-based cement grouting material include A component and B component; the raw materials of the A component include, in parts by weight, calcined magnesium oxide 140-200 parts, bentonite 0-30 parts, hydroxypropyl methylcellulose 0.2-0.5 parts, an additive 1-10 parts and water 70-140 parts; the raw materials of the B component include a first dihydrogen phosphate 70-100 parts, pretreated high-molecular water-absorbing resin 20-50 parts, sodium polyacrylate 0.5-2 parts and water 30-70 parts; the pretreated high-molecular water-absorbing resin is obtained by soaking the high-molecular water-absorbing resin in an aqueous solution of a second dihydrogen phosphate. The magnesium phosphate-based cement grouting material has the characteristics of low shrinkage, short and adjustable setting time, high compressive strength, simple construction, low cost, green environmental protection, good grout injection, good water dispersion resistance, good durability in a long-term soaking environment and the like.

The invention relates to a plaster with large drug loading capacity and strong permeability and a preparation method thereof, belongs to the technical field of pharmaceutical preparations, and solves the problems of low drug loading capacity and poor drug transdermal efficiency of the traditional plaster. The plaster comprises the following components in parts by weight: 10-20 parts of gelatin, 5-15 parts of sodium polyacrylate, 1-3 parts of carbomer 9401 and 150-260 parts of glycerol. 0.1 to 0.5 part of a volatile oil compound and 0.2 to 0.4 part of azone; 5 to 15 parts of silicon dioxide, 0.1 to 0.5 part of ethylparaben and 3 to 5 parts of deionized water. The plaster provided by the invention is high in drug loading capacity, the drug loading capacity reaches 80% or above, the permeability is strong, and the preparation process of the plaster is stable.

The invention discloses an antibacterial wood coating based on water-based macromolecule combination. The antibacterial wood coating comprises the following components: a water-based macromolecule matrix, nano-silver particles, nano-copper particles, nano-titanium dioxide, a propolis extract, a dispersing agent, a surfactant, an antioxidant, an organic silicon compound, an ultraviolet light absorber, sodium polyacrylate, a cross-linking agent and deionized water. According to the antibacterial wood coating based on water-based macromolecule combination, the technical problems of stability, antibacterial effect, environmental friendliness, multifunctionality and the like of the antibacterial wood coating are solved, and an efficient, lasting and environment-friendly solution is provided.

The invention relates to the technical field of polymer absorbing materials, in particular to high-liquid-conductivity composite sodium polyacrylate water-absorbent resin, a preparation method and application. The water-absorbent resin is composed of a sodium polyacrylate matrix, low-melting-point ES fibers (accounting for 5-15% of the mass) activated through plasma or alkali etching and a surface cross-linking agent (such as glycerol and polyethylene glycol). The method comprises the following steps: melting a fiber sheath layer to coat SAP particles through one-time heat treatment (120-150 DEG C, 30-60 minutes), and meanwhile, constructing a surface chemical network by a cross-linking agent to form a physical-chemical dual structure. The composite SAP has excellent transverse drainage rate, wet compressive strength and circulation structure integrity, the liquid distribution efficiency and stability of the absorption core layer are remarkably improved, and the composite SAP is suitable for the field of hygienic products such as paper diapers and sanitary towels.

The invention relates to the field of water treatment agents, and discloses a composition with scale inhibition and corrosion inhibition functions, the composition comprises a first component, a second component, a third component, a fourth component and an optional Schiff base compound; the first component is selected from at least one of a C2-C6 alcohol amine compound, a C4-C8 cyclic amine compound, a nitrogen-containing heterocyclic compound and gluconate; the second component is selected from at least one of a benzotriazole compound, a benzothiazole compound and a thiourea compound; the third component is an inorganic metal salt; the fourth component is selected from at least one of a sodium acetate compound, sodium polyacrylate, sodium polymaleate and polyepoxysuccinic acid. The composition has relatively strong scale inhibition and scale dissolving effects on a high-hardness and high-alkalinity circulating water system, has long-term corrosion inhibition on metals, and reduces the water supplementing and changing times of the circulating water system.

The invention discloses a cosmetic composition and a preparation method and application thereof, the cosmetic composition comprises functional powder, polyol, water, an emollient, a thickening agent, a surfactant and an emulsifier, the thickening agent comprises xanthan gum, sodium polyacrylate and a sodium acrylate / sodium acryloyldimethyl taurate copolymer, and the emulsifier comprises sodium polyacrylate and sodium acryloyldimethyl taurate. The surfactant is prepared from sodium stearoyl glutamate and potassium cetyl phosphate, and the emulsifier is prepared from polyglycerol-2 dipolyhydroxystearate; the cosmetic composition disclosed by the invention can realize phase inversion in a use process (the cosmetic composition is initially in an oil-in-water type and can be converted into a water-in-oil type in a smearing process), has relatively good stability and a relatively good water-resistant effect, and can simultaneously meet a refreshing skin feeling and a makeup-holding and sweat-preventing function.

The invention provides a temperature-sensitive hydrogel fire extinguishing additive, a preparation method thereof and a fire extinguishing agent. The temperature-sensitive hydrogel fire extinguishing additive is prepared from the following raw materials in parts by mass: 1 to 3 parts of methyl cellulose, 2 to 6 parts of cross-linking agent, 2 to 12 parts of lubricant, 10 to 20 parts of metal salt, 1 to 3 parts of hydrocarbon surfactant, 3 to 6 parts of phosphorus flame retardant, 3 to 5 parts of cosolvent and 1 to 5 parts of heat stabilizer. The cross-linking agent is selected from one or more of sodium alginate, sodium polyacrylate, polyacrylamide, carrageenan, guar gum, xanthan gum, genipin, tannic acid and sodium carboxymethyl cellulose, and the lubricant is polyethylene glycol and / or polyvinyl alcohol. The temperature-sensitive hydrogel fire extinguishing additive disclosed by the invention is non-toxic, harmless, non-corrosive, environment-friendly, easy to degrade, easy to prepare and store, low in viscosity, high in critical transition temperature and high in gelling speed, and can extinguish a fire disaster of the lithium ion battery more quickly, avoid re-combustion of the lithium ion battery and realize continuous cooling of the battery at the same time.

The invention relates to the technical field of medical products, in particular to a high-viscosity gel patch matrix and a preparation method, the high-viscosity gel patch matrix comprises the following raw materials: modified sodium polyacrylate, a film-forming agent, a penetration enhancer, a tackifier, a pH regulator, a humectant, a composite cross-linking agent and deionized water; the preparation method comprises the following steps: step a, dispersing modified sodium polyacrylate in deionized water to obtain a gel patch matrix skeleton liquid; step b, adding a film-forming agent, a penetration enhancer and a tackifier into the humectant to obtain a mixture A; and step c, adding the gel patch matrix skeleton liquid, the composite cross-linking agent and the pH regulator into the mixture A, magnetically stirring, and naturally cooling to obtain the high-viscosity gel patch matrix. The high-viscosity gel patch prepared by the invention is high in substrate viscosity, good in holding power and air permeability, good in antibacterial property and good in biocompatibility, can be repeatedly uncovered and pasted, and does not cause pain or damage skin when being uncovered and separated.

The invention provides a sodium ion specific fluorescence labeled transparent soil sample as well as a preparation method and application thereof, and belongs to the technical field of rock soil and geological engineering. The method comprises the following steps: firstly, sequentially carrying out hydrophilization treatment, solvent evaporation and dissolution on a sodion combined benzofuran isophthalate probe to obtain a probe mother solution; mixing the probe mother solution, a buffer solution, an inorganic sodium salt solution and a solvent to prepare a fluorescence labeling pore solution; and finally, mixing the sodium polyacrylate particles and the fluorescence labeled pore liquid, and performing vacuum saturation treatment to obtain the transparent soil sample. The transparent soil sample provided by the invention still keeps excellent optical transparency while having sodium ion specific response capability, so that a stable and reliable experimental medium is provided for in-situ, real-time and full-field observation of sodium ion migration.

The invention discloses an anti-leaching nutrient slow-release synergistic compound fertilizer, and particularly discloses an anti-leaching nutrient slow-release synergistic compound fertilizer and a preparation method thereof. The compound fertilizer comprises the following components in parts by weight: 30-50 parts of urea particles, 15-25 parts of monoammonium phosphate, 20-30 parts of potassium sulfate, 2-5 parts of a slow-release synergistic coating agent, 1-3 parts of a bonding wrapping layer and 10-20 parts of a filling material. The slow-release synergistic coating agent comprises polyaspartic acid (PASP) and a composite inhibitor (a urease inhibitor and a nitrification inhibitor), and the bonding wrapping layer is made of a polyvinyl alcohol / sodium polyethylene acid-based cementing material. The preparation method comprises the following steps: mixing and granulating raw materials, carrying out primary coating (slow-release synergist), carrying out secondary coating (bonding a coating layer), and drying and screening. Through the synergistic effect of the double coating technology and the compound inhibitor, the nitrogen conversion and release are obviously delayed, the nutrient leaching loss is reduced by 20-40%, the fertilizer utilization rate is improved by 25-30%, and the compound fertilizer is suitable for high-temperature and rainy areas.

The invention relates to the field of preparation of calcium hydroxide, and particularly discloses a digestion preparation method of high-purity calcium hydroxide, which comprises the following steps: S1, preparing calcium oxide; s2, pretreatment; s3, pre-digestion: mixing the pretreated calcium oxide powder with deionized water, and reacting to obtain primary feed liquid; s4, deep digestion: supplementing deionized water into the primary feed liquid, and reacting to obtain secondary feed liquid; s5, impurity removal and purification: adding sodium polyacrylate and polyacrylamide into the secondary feed liquid, uniformly stirring, standing for 6-8 hours, and circularly filtering by adopting a membrane filtration system to obtain a third feed liquid; and S6, calcium hydroxide preparation: performing impurity removal, dehydration, drying and screening on the third-time feed liquid to obtain calcium hydroxide. According to the invention, process optimization is carried out on the basis of a lime digestion method, so that the purity of the prepared calcium hydroxide reaches 96% or above, and the calcium hydroxide can be used in the industrial fields with high purity requirements, such as heat stabilizers.

The invention discloses a cement mortar reinforcing agent and a preparation method thereof, relates to the field of cement mortar reinforcing agents, and is characterized in that the limit ranges of the DEAIPA dosage (15-20 parts), the titanate coupling agent hydrolysis time (3-5 hours) and the main mixing reaction temperature (60-70 DEG C) are controlled. A titanate coupling agent is hydrolyzed at specific pH and temperature until the conversion rate of-SiOR groups is high, sodium polyacrylate adsorbs sodium bicarbonate to form CO2-loaded microspheres, then the CO2-loaded microspheres are mixed and reacted with raw materials such as calcium formate and DEAIPA at limited temperature, and finally the reinforcing agent is prepared. Ten groups of contrast experiments are designed for verification: 1-5 groups are conventional groups with parameters within a limited range, 6-9 groups are control groups with parameters exceeding the range, and 10 groups are traditional raw material blank groups. Experiments show that the 3-day / 28-day compressive strength and the total shrinkage rate of a conventional group are remarkably superior to those of an out-of-range group and a blank group, a nonlinear relation exists in the synergistic effect of parameters, and it is proved that the limited range has practical significance for improving the mechanical property and the crack resistance of the low-clinker cement.