737 results about "Sodium polyacrylate" patented technology

The invention belongs to the technical field of ceramic glaze, and particularly discloses antibacterial ceramic glaze and a preparation method thereof.The ceramic glaze is prepared from, by mass, 60-75 parts of basic glaze, 1-3 parts of nanometer titania, 2-6 parts of cosolvent, 0.5-3 parts of ochre, 5-10 parts of curcumin, 1-3 parts of stabilizer, 1-5 parts of rare earth antibacterial agent and 1-3 parts of sodium polyacrylate, and 1-6 parts of a composite additive. According to the antibacterial ceramic glaze and the preparation method thereof, the antibacterial performance, glossiness and smoothness of a glaze surface are improved, the crystal structure of the glaze can be refined through introduction of rare earth ions, the hardness of the glaze surface is enhanced, the wear resistance of a ceramic product is effectively improved, and the service life of the ceramic product is prolonged. Stable chemical bonds are formed in the glaze due to the special chemical properties of the rare earth elements, the resistance of the glaze to chemical substances such as acid and alkali is enhanced, and the chemical corrosion resistance of the ceramic glaze is improved.

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 a low-carbon phase change energy storage UHPC (Ultra High Performance Concrete) and a preparation method thereof. The low-carbon phase change energy storage UHPC comprises the following components in parts by weight: 1400 parts of cement, 320-400 parts of fly ash, 200-280 parts of silica fume, 400-480 parts of water, 1200 parts of machine-made sand, 1700 parts of phase change aggregate, 2 parts of modified carbon fiber, 20 parts of a polycarboxylic acid high-performance water reducing agent, 2 parts of a composite thickening time control agent and 1 part of sodium polyacrylate. The preparation method comprises the following steps: weighing materials; preparing concrete 1: preparing a mixed solution 1; stirring the concrete 1; preparing concrete (2); preparing mixed liquid (2); stirring the concrete (2); and pouring concrete, vibrating and curing. According to the method, UHPC shrinkage control is carried out by adopting a multi-dimensional crack control method, and penetrating cracks and deep cracks are prevented from being generated in a concrete structure; the provided phase change energy storage UHPC has the heat storage and release capacity, the indoor temperature can be adjusted, and resource energy consumption is reduced.

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 belongs to the technical field of water treatment agents, and particularly relates to a water treatment agent based on comprehensive utilization of red mud and a preparation method thereof. The water treatment agent based on comprehensive utilization of red mud is prepared from the following preparation raw materials in parts by weight: 95 to 105 parts of red mud, 25 to 35 parts of dolomite, 10 to 20 parts of diatomite and 5 to 10 parts of sodium polyacrylate. The invention aims to break through the technical bottleneck of a red mud-based water treatment agent through component design and process optimization. The adsorption activity of red mud is activated by introducing dolomite to regulate the alkalinity of a system, mass transfer and dispersity are enhanced by utilizing the high specific surface area of diatomite, and rapid flocculation separation of adsorbed pollutants is realized by virtue of assistance of sodium polyacrylate. All the components form a synergistic removal mechanism aiming at COD, ammonia nitrogen and total phosphorus through pH regulation and control, multi-level adsorption, coprecipitation and flocculation coupling effects, the treatment efficiency and economical efficiency are remarkably improved, and a new way is provided for high-value utilization of the red mud.

The invention relates to a method for preparing hexagonal flaky magnesium hydroxide through a hydration modification one-step method, and belongs to the technical field of inorganic material preparation. Hyperbranched sodium polyacrylate containing phosphonic acid and ammonium phosphonate salt is synthesized and serves as a crystal forming agent for magnesium hydroxide crystal growth, the hyperbranched sodium polyacrylate can coordinate with magnesium ions, uniform growth of all crystal faces of the magnesium hydroxide crystal is promoted, and the magnesium hydroxide crystal growth rate is increased. And the hyperbranched structure can better and moderately wrap the formed magnesium hydroxide crystal, so that the uniform growth property of the crystal face is improved. In addition, ammonium phosphate groups and carboxylate in the crystal forming agent have good wetting dispersity, agglomeration of magnesium hydroxide crystals is weakened, and the particle size distribution uniformity is improved. According to the method, the magnesium oxide powder and the crystal forming agent are ground and then subjected to the hydration reaction, the hexagonal flaky magnesium hydroxide is synthesized through a one-step method, and the prepared magnesium hydroxide is in a regular hexagonal flaky shape, has uniform particle size distribution, and has relatively high purity and relatively low impurity content.

The invention discloses acid-resistant calcium carbonate and a preparation method thereof, and belongs to the technical field of calcium carbonate filler production. According to the invention, industrial waste carbide slag is used as a calcium source, and calcium hydroxide slurry is obtained through impurity removal; then adding sodium polyacrylate and sodium hexametaphosphate, stirring and dispersing, then introducing carbon dioxide for carbonization, adding a surfactant for ultrasonic activation after carbonization, and finally sequentially adding zirconium oxychloride and sodium silicate to prepare the acid-resistant calcium carbonate. The defects of traditional silicon dioxide and titanium dioxide coated calcium carbonate products are overcome, the prepared calcium carbonate product is compact and uniform in coating layer and good in stability, meanwhile, excellent acid resistance and mechanical property are considered, the calcium carbonate can be suitable for more acid environments, and the application range of calcium carbonate is effectively widened.

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 relates to the technical field of water treatment, and particularly discloses a crystal nucleus granulation induced hardness removal integrated water treatment process which comprises the following steps: firstly, ultrasonically dispersing nano-hydroxyapatite in deionized water, adding gamma-glycidoxypropyltrimethoxysilane for reaction, and treating to obtain a silanized hydroxyapatite crystal nucleus; the sodium polyacrylate reacts with aluminum sulfate and the like in an ethylene glycol solution to prepare the composite inducer. The preparation method comprises the following steps: reacting the two components in a phosphate buffer solution in proportion to obtain inducer-loaded crystal nucleus particles, carrying out multi-step reaction and treatment on the inducer-loaded crystal nucleus particles with calcium chloride and the like to obtain surface-coated crystal nucleus granulation bodies, and mixing the surface-coated crystal nucleus granulation bodies with cationic polyacrylamide and nano-zinc oxide to prepare the reinforced hardness removal agent. When to-be-treated water is treated, the reinforced hardness removal agent is added, stirring and precipitation are performed, supernate sequentially passes through the activated carbon filter column to adsorb impurities and is sterilized by the ultraviolet disinfection device, and finally effluent is collected, so that the hardness in the water can be efficiently removed, the process integration level is high, and the effect is good.

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 discloses an anti-inflammatory and pain-relieving cataplasm capable of improving drug stability and a preparation method thereof, and belongs to the technical field of traditional Chinese medicines. The inflammation diminishing and pain relieving cataplasm is prepared from the following raw material components: methyl salicylate, eucalyptus oil, synthetic menthol, camphor, borneol, thymol, belladonna liquid extract, diphenhydramine hydrochloride, DL-tartaric acid, gelatin, titanium dioxide, PVP, sorbitol, beta-cyclodextrin, dihydroxyaluminum aminoacetate, castor oil, partially neutralized sodium polyacrylate, glycerol and purified water. Through process improvement and inclusion of volatile materials in the formula with beta-cyclodextrin, the prepared inflammation-diminishing and pain-relieving cataplasm has the characteristics of good stability and capability of remarkably improving in-vitro drug release.

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 relates to a high-performance concrete admixture composition for a wind power tower drum and a preparation method of the high-performance concrete admixture composition, and relates to the field of concrete admixtures. The water reducing agent is prepared from the following components in parts by weight: 35 to 45 parts of a shrinkage reducing type polycarboxylic acid water reducing agent, 8 to 12 parts of methoxy polyethylene glycol acrylate modified nano silicon dioxide, 1.5 to 2.5 parts of sodium dodecyl polyoxyethylene ether sulfonate, 0.8 to 1.5 parts of coconut oil diethanolamide, 0.3 to 0.8 part of sodium polyacrylate, 0.2 to 0.6 part of ammonium tripolyphosphate, 0.05 to 0.15 part of a polyether defoaming agent and 40 to 50 parts of water. According to the invention, the hydration process of the concrete is regulated and controlled through the synergistic interaction among various additives, the pore structure in the concrete is optimized, and an interface transition region is strengthened, so that the systematic improvement of the microstructure of the concrete is realized, and the strength and durability of the concrete are remarkably improved.

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 utility model discloses a water stopping device and system for underground water layered monitoring, the water stopping device comprises a base body column and a water swelling rubber layer, and the water swelling rubber layer is arranged on the side surface of the base body column; the guide rings are arranged on the upper side and the lower side of the base body column and used for limiting the water swelling rubber layer; and the hollow pipe penetrates through the base body column and the guide ring. The defects that current single-hole layered monitoring work is mostly achieved through variable-diameter hole-forming construction or water stop plugs, but the variable-diameter hole-forming construction or the water stop plugs are large in occupied area, high in manufacturing cost, limited in monitored target layer and incapable of or not suitable for long-time water stop are overcome. The water swelling rubber layer containing the sodium polyacrylate super absorbent resin is adopted as a water stop material, the monitoring probe is lowered to a water-resisting layer between different water-bearing layers in cooperation with the connecting rod, and permanent monitoring of the multi-target water-bearing layer is achieved.

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.

Disclosed is a composite for enabling sandy soil to have water retention and nutrient retention capabilities, a water-retaining agent, a preparation method, and use thereof. The composite includes polyacrylamide, sodium polyacrylate, and xanthan gum. Also disclosed is a water-retaining agent including the composite and a method for utilizing the composite to improve the water retention and / or nutrient retention capabilities of sandy soil. Through the synergistic effect of polyacrylamide, sodium polyacrylate, and xanthan gum, this invention not only alters the looseness of sandy soil, increases the viscosity, and significantly reduces water loss and volatilization, but also improves the retention capacity of fertilizer nutrients to extend the effective duration. The composite is environmentally friendly, cost-effective, and effectively improves the properties of sand, showing the effects of retaining water and nutrients, facilitating plant growth, and offering high application value.

The invention discloses a magnesium phosphate-based cement grouting material as well as a preparation method and application thereof. Raw materials of the magnesium phosphate-based cement grouting material comprise a component A and a component B, the component A is prepared from the following raw materials in parts by weight: 140 to 200 parts of calcined magnesium oxide, 0 to 30 parts of bentonite, 0.2 to 0.5 part of hydroxypropyl methyl cellulose, 1 to 10 parts of an additive and 70 to 140 parts of water; the component B comprises the following raw materials in parts by weight: 70-100 parts of first dihydric phosphate, 20-50 parts of pretreated polymer water-absorbent resin, 0.5-2 parts of sodium polyacrylate and 30-70 parts of water; the pretreated high-molecular water-absorbent resin is obtained by soaking high-molecular water-absorbent resin in an aqueous solution of second dihydric phosphate. The magnesium phosphate-based cement grouting material disclosed by the invention has the characteristics of low shrinkage, short and adjustable setting time, high compressive strength, simplicity in construction, low cost, environment friendliness, good slurry injectability, good water dispersibility resistance and good durability in a long-term water soaking environment.

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.