2708 results about "Vinyl alcohol" patented technology

A dual-molded silicone-polyamide composite article including a first molded piece that comprises a blend of polyamide and an ethylene-vinyl alcohol copolymer and a second molded piece that comprises a thermoset, hydrosilylation-cure silicone polymer. A portion of a surface of the second molded piece is autogenously bonded to a portion of a surface of the first molded piece.

The invention discloses carbon-dot-based high-moisture-content tough hydrogel and a preparation method thereof, and belongs to the technical field of hydrogel. Specific carbon dots (hydroquinone carbon dots) are introduced, the hydroquinone carbon dots are used as nano-filler and are connected to a double-crosslinking network of sodium alginate / polyvinyl alcohol hydrogel through hydrogen bonds, effective crosslinking polymerization is promoted, and the hydrogel is prepared. The hydroquinone carbon dots are introduced, so that the conductivity can be improved, the mechanical property of the high-water-content hydrogel can be enhanced, the preparation process is simple, and the performance is excellent.

The invention belongs to the field of intelligent soft materials, and discloses conductive eutectic gel with self-adhesion, wide-temperature strain sensing and high sensitivity as well as a preparation method and application of the conductive eutectic gel. The eutectic gel is prepared from polydopamine, polyvinyl alcohol, a polymer monomer, a eutectic conductive agent (which is prepared by adding ethylene glycol and a conductive agent into a polyvinyl alcohol solution and stirring), a cross-linking agent, an initiator and water. Strain sensing related tests prove that the gel has excellent sensitivity and strain sensing performance, and has application potential in the fields of high and low temperature severe environment monitoring, human health monitoring and motion monitoring.

The invention belongs to the technical field of hydrogel materials, and particularly relates to a preparation method of carbon dot-based super-strong hydrogel. The carbon-dot-based super-strong hydrogel is prepared by taking specific carbon dots (citric acid carbon dots, tannic acid carbon dots, malic acid carbon dots or bark carbon dots) as nano-filler and salting-out-assisted progressive stretching, the specific carbon dots are used as the nano-filler, and the HofMichast effect sensitive characteristic of polyvinyl alcohol is utilized, so that the carbon-dot-based super-strong hydrogel is prepared. Carbon dots and salting-out progressive stretching are combined to construct the super-strong hydrogel, and the super-strong hydrogel is simple in preparation process and excellent in performance.

The invention relates to the technical field of polymeric membrane materials, and particularly discloses an antistatic polyethylene composite membrane and a preparation method thereof. Comprising the following raw materials in parts by weight: 100 parts of low-density polyethylene, 5-9 parts of high-density polyethylene, 10-20 parts of maleic anhydride grafted polyethylene, 8-15 parts of a polyvinyl alcohol modified material, 3-5 parts of antistatic modified carbon black, 0.5-1 part of an antioxidant and 1-2 parts of a dispersing agent, the polyethylene composite film has excellent dispersibility, can effectively enhance the mechanical properties of the polyethylene composite film through the synergistic effect of physical filling and chemical grafting, forms a layer of conductive network structure, namely a conductive film, on the surface of the material through the combined effect of the polyethylene composite film and the antistatic agent, prevents the generation and accumulation of static electricity, and has good compatibility among the raw materials. And the material has excellent mechanical property and antistatic property.

The invention provides a high-barrier fresh-keeping low-temperature heat-sealing composite film and a manufacturing process and application thereof, the composite film sequentially comprises a heat-sealing layer, a barrier layer, a reinforcing layer and a surface treatment layer from the inner layer to the outer layer, and the layers are bonded through bonding layers. The heat-sealing layer is prepared from modified polyethylene, polypropylene and a heat-sealing auxiliary agent, and the barrier layer is made of a composite material of nano aluminum oxide, polyvinylidene fluoride and an ethylene-vinyl alcohol copolymer. The enhancement layer is a polyester film, and the surface treatment layer is subjected to corona treatment. The composite film is prepared through a specific manufacturing process, and the specific manufacturing process comprises the steps of preparation of the heat sealing layer and the blocking layer, compounding, curing treatment, surface treatment and the like. The composite film disclosed by the invention has excellent barrier property and low-temperature heat-sealing capability, is suitable for vacuum packaging or modified atmosphere packaging of foods, and effectively prolongs the fresh-keeping period and the shelf life of the foods.

The invention discloses a preparation method of a degradable transparent conductive polymer film, and belongs to the technical field of film preparation. Preparing dispersion liquid I through graphene oxide quantum dots; preparing a dispersion liquid II from polyaniline nanofibers; dissolving pyrrole and toluenesulfonic acid in N, N-dimethylformamide to prepare a reaction solution, adding the dispersion liquid I and the dispersion liquid II, stirring, and adding ferric chloride hexahydrate to obtain a reaction solution; adjusting the pH value of the reaction solution to 1.5, and heating to obtain a polypyrrole solution; preparing cellulose acetate, polyvinyl alcohol and N, N-dimethylformamide to obtain a cellulose acetate solution; mixing the polypyrrole solution and the cellulose acetate solution, adding glutaraldehyde to obtain a mixed solution, and pouring the mixed solution into a mold to prepare a composite wet film; and putting the composite wet film into a hot-pressing forming machine for hot-pressing to generate the polymer film. The conductive polymer film prepared by the invention can be applied to the fields of supercapacitor electrode materials, electromagnetic shielding materials, flexible sensors and the like, and provides a new high-performance material choice for the development of related fields.

The invention discloses a high-barrier polycrystalline silicon packaging film and a preparation method thereof, and relates to the technical field of packaging materials. The high-barrier polycrystalline silicon packaging film consists of a polyester film carrier and functional slurry, the functional slurry is prepared from the following raw materials in parts by weight: 15 to 25 parts of ethylene-vinyl alcohol copolymer, 10 to 18 parts of polyvinylidene chloride, 5 to 10 parts of modified nano montmorillonite, 8 to 15 parts of modified polylactic acid, 3 to 6 parts of tributyl citrate, 1 to 3 parts of antioxidant 1010, 1 to 3 parts of ultraviolet light absorber UV-531, 0.5 to 1.5 parts of nucleating agent NA-11, 1 to 2 parts of silane coupling agent KH-550 and 3 to 7 parts of modified silicon dioxide aerogel; 2 to 5 parts of vinyl trimethoxy silane, 1 to 3 parts of nano silver and 20 to 30 parts of deionized water. The high-barrier polycrystalline silicon packaging film has excellent barrier performance, and can effectively block oxygen, water vapor and the like. The polycrystalline silicon packaging film is good in mechanical performance, not prone to damage, antibacterial, antioxidant and anti-ultraviolet, the quality guarantee period of polycrystalline silicon can be prolonged, the product quality can be guaranteed, and the polycrystalline silicon packaging film has great application value in the field of polycrystalline silicon packaging.

The invention provides a carbon nanotube / polyvinyl alcohol hydrogel and a preparation method and application thereof, and belongs to the technical field of composite materials and flexible electron cross materials. Cellulose nanofibers and multi-walled carbon nanotubes are dispersed in deionized water to obtain dispersion liquid; uniformly mixing a polyvinyl alcohol solution and the dispersion liquid to obtain a mixed solution; carrying out oriented freezing forming on the mixed solution, and then freeze-drying the mixed solution to obtain an aerogel sample; performing hot pressing on the aerogel sample to obtain a thin film material; and swelling and balancing the film material in deionized water to obtain the carbon nanotube / polyvinyl alcohol hydrogel. According to the invention, collaborative optimization of conductive network continuity, interface bonding strength and energy dissipation capability is realized, so that high conductivity, high stress and obdurability are considered, and the material is endowed with multi-dimensional strain sensing capability and signal stability; and a new idea is provided for realizing effective balance between high conductivity and excellent mechanical properties of the hydrogel material.

The invention discloses a preparation method of a salt-resistant polyurethane sponge evaporator for a photo-thermal interface, which comprises the following steps: taking polyurethane sponge as a support framework, taking polyvinyl alcohol as a precursor solution, adding carbon black and PEDOT: PSS (poly (3, 4-ethylenedioxythiophene): poly (styrenesulfonate)) into the precursor solution as photo-thermal materials, and synthesizing the salt-resistant polyurethane sponge evaporator by an extrusion thermal crosslinking freeze-drying method. According to the obtained evaporator, the excellent photothermal conversion performance of carbon black / PEDOT: PSS and a porous framework structure mainly comprising polyurethane / polyvinyl alcohol are fully utilized, the water absorption, the mechanical performance and the photothermal conversion efficiency of the evaporator are effectively improved, the heat conductivity is reduced, it is guaranteed that salt crystals do not appear inside and on the surface of the evaporator while efficient interface evaporation is achieved, and the service life of the evaporator is prolonged. The device can be widely applied to solar interface evaporation in saline water, actual seawater or high-salinity wastewater so as to obtain clean water resources.

The invention relates to the technical field of blocking medicine bottles, and particularly discloses a blocking medicine bottle and a preparation method thereof, aiming at the problems that the upper limit of the blocking performance of the existing blocking medicine bottle is low and the blocking performance is difficult to break through due to the fact that the blocking performance of the existing blocking medicine bottle is mostly realized through structural design. A bottle body of the blocking medicine bottle comprises an inner layer, a secondary inner layer, a middle layer, a secondary outer layer and an outer layer which are sequentially arranged in a covering mode. The inner layer comprises polyethylene; the secondary inner layer comprises an ethylene-methyl acrylate copolymer; the middle layer comprises an ethylene-vinyl alcohol copolymer, cyclic polyolefin and modified montmorillonite; the secondary outer layer comprises an ethylene-methyl acrylate copolymer; the outer layer comprises polyethylene, cyclic polyolefin and modified montmorillonite. The barrier medicine bottle is formed by compositing five layers of materials, the oxygen and water transmittance is low, the barrier property is high, and the barrier medicine bottle has great application value in packaging of medicine or food and the like.

The invention relates to the technical field of chlorinated polyvinyl chloride plastics, in particular to a PVC corrosion-resistant cable protection pipe and a preparation process thereof. The invention aims to solve the problem that the mechanical property and the corrosion resistance of the existing PVC cable protection pipe cannot be considered at the same time. Chlorinated polyvinyl chloride and polyvinyl chloride are subjected to hot mixing to obtain matrix resin, and the corrosion-resistant additive, the composite flame retardant, the flexibilizer and other additives are added to obtain the cable protection tube. The corrosion-resistant additive is obtained by grafting and modifying nano silicon dioxide with epoxy resin and premixing with an ethylene-vinyl alcohol copolymer; the composite flame retardant comprises core layers of nitrogen series, phosphorus series and inorganic hydroxides and a shell layer of an acrylate polymer, and is obtained through a core-shell reaction; the cable protection pipe is prepared through a multi-step mixing process; by introducing the core-shell structure and the corrosion-resistant auxiliary agent, efficient flame retardance and corrosion resistance are achieved, stress is buffered through the flexible shell layer, and the mechanical property of the material is maintained.

The invention discloses a polyvinyl alcohol composite film as well as a preparation method and application thereof in food coloring detection. The polyvinyl alcohol composite film is prepared from raw materials including phenylboronic acid modified carbon dots and polyvinyl alcohol through a thermocuring reaction, a phenylboronic acid group on the surface of the phenylboronic acid modified carbon dot and polyvinyl alcohol form a reversible covalent bond crosslinking point based on boric acid ester so as to form a dynamic three-dimensional network, and the structural formula of the phenylboronic acid modified carbon dot is # imgabs 1 #. The phenylboronic acid modified carbon dot is simple in process, easy to process and form and simple and convenient to use; compared with the prior art, the carbon dots modified by phenylboronic acid groups and the polyvinyl alcohol are added, the crosslinking effect between the carbon dots modified by the phenylboronic acid groups and the polyvinyl alcohol is remarkably enhanced, the mechanical strength and water resistance of the composite film are improved, the food coloring detection capacity of the composite film is improved, and in addition, the composite film further has the characteristic of being capable of being reprocessed, so that the composite film has wide application value.

The invention discloses an ethylene-vinyl alcohol copolymer and a preparation process thereof, and relates to the technical field of EVOH. According to the preparation process of the ethylene-vinyl alcohol copolymer, through gradient control of EVA polymerization and alcoholysis process conditions, on one hand, uniform control of heat release in a polymerization stage and an alcoholysis stage can be realized, heat in each stage is fully utilized, and the conversion rate and alcoholysis efficiency in the polymerization process are improved; on the other hand, effective regulation and control of EVOH composition, molecular weight distribution, molecular chain sequence structure and stereoregularity can be realized; finally, side reactions in the polymerization stage and the alcoholysis stage can be reduced, and generation of gel and impurities is reduced.

The invention belongs to the technical field of packaging adhesive films for photovoltaic modules, and particularly relates to a water-blocking and oxygen-blocking adhesive film for photovoltaic module packaging and a preparation method of the water-blocking and oxygen-blocking adhesive film for photovoltaic module packaging, and the water-blocking and oxygen-blocking adhesive film comprises a water-blocking layer and an oxygen-blocking layer which are adjacent to each other through co-extrusion; wherein the waterproof layer is prepared from the following materials in parts by mass: 100 parts of grafted polyolefin resin, 0.05 to 0.5 part of alkaline nano oxide and 0.1 to 1 part of antioxidant; the oxygen barrier layer is prepared from the following materials in parts by mass: 100 parts of oxygen barrier resin, 0.1-1 part of an oxygen absorbent, 0.1-1 part of a silane coupling agent and 0.05-0.5 part of a light conversion agent; the oxygen-resistant resin comprises any one or a combination of more of PS (polystyrene), PE (polyethylene), PET (polyethylene terephthalate), PB (polybutylene), PP (polypropylene), PVC (polyvinyl chloride), PVDC (polyvinyl dichloride), PA6 (polyamide 6) and EVOH (ethylene-vinyl alcohol).

The invention discloses an ethylene-vinyl alcohol copolymer and a preparation method thereof, and relates to the technical field of resin. According to the technical scheme, the preparation method comprises the following steps: adding ethylene, low-carbon alkane, alkyl acid ethyl ester, alkyl acid vinyl ester and a carbon-carbon skeleton initiator into a reaction kettle, and carrying out a free radical polymerization reaction; adding a polymerization inhibitor to terminate the reaction, removing low-carbon alkane, unreacted ethylene and alkyl acid vinyl ester, and preparing the reaction liquid into an alcoholic solution; adding a catalyst into the alcohol solution for saponification reaction, and then performing acid pickling, water washing and drying to obtain the ethylene-vinyl alcohol copolymer. The low-carbon alkane which is low in boiling point, easy to vaporize and high in latent heat of vaporization and the saturated alkyl acid ethyl ester with good solubility are adopted as the mixed solvent to replace a traditional alcohol solvent, so that removal and control of reaction heat are facilitated, generation of insoluble gel is reduced, a copolymer with narrow molecular weight distribution is easy to obtain, and the method is suitable for industrial production. The cost that azeotrope formed by the alcohol solvent and the monomer is difficult to separate and recover is greatly reduced, and the production efficiency is improved.

The invention discloses a preparation method and application of polyvinyl alcohol assisted molded aramid nanofiber aerogel. The preparation method of the aerogel comprises the following steps: pulping aramid pulp, homogenizing and centrifuging to obtain an aramid nanofiber aqueous dispersion; dissolving polyvinyl alcohol in deionized water to obtain a polyvinyl alcohol aqueous solution; and mixing the aramid nanofiber aqueous dispersion and the polyvinyl alcohol aqueous solution, placing the mixture in a container, and carrying out liquid nitrogen unidirectional freezing, freeze drying and low-temperature heat treatment to obtain the aerogel. According to the aerogel prepared by the method, due to the physical winding effect of a polyvinyl alcohol polymer chain and the chemical combination effect of a hydrogen bond, dispersion of the aramid nanofiber in a water-based solvent is synergistically promoted; therefore, the phenomena of agglomeration and adhesion, non-uniform forming, slag and powder falling and the like caused by Van der Waals interaction, hydrophilic and hydrophobic interaction and the like among the adjacent aramid nanofibers in the freezing casting process are avoided; the aramid nanofiber in the aerogel subjected to low-temperature heat treatment is close to single distribution, and a viscous polyvinyl alcohol molecular chain is converted into a conjugated carbon chain, so that the mechanical properties of compression, stretching and the like of the aerogel are remarkably improved. In addition, the aerogel can be used as a wave-absorbing material after being carbonized at a high temperature, has the advantages of thin thickness and light weight, and has the wave-absorbing capability of wide frequency band and strong absorption.

The invention relates to a preparation method of a composite nano sponge for efficiently adsorbing rare earth ions in acidic wastewater, a product and application thereof, and belongs to the technical field of rare earth ion separation and purification. The composite nano sponge is prepared by taking cheap and green beta-cyclodextrin, polyvinyl alcohol, phosphorylated chitosan and citric acid as raw materials, mixing beta-cyclodextrin functionalized polyvinyl alcohol and phosphorylated chitosan and taking citric acid as a cross-linking agent. Experimental results show that the composite nano sponge is good in acid resistance, high in adsorption capacity and good in cyclic regeneration capacity, the removal rate of the composite nano sponge to rare earth ions in simulated acid mine water is higher than 92.9%, and the adsorption rate of the composite nano sponge to competitive ions does not exceed 2.0%. The composite nano sponge shows a potential application prospect in the recovery of rare earth ions in acid wastewater, and is expected to improve the current situation that the acquisition way of rare earth elements is single.

The invention provides a magnetite-loaded extracellular polymeric material and a preparation method and application thereof.The preparation method comprises the following steps that excess sludge and a sodium chloride solution are mixed and heated, extracellular polymeric substances in the excess sludge are dissociated, and a mixed solution is obtained; carrying out centrifugal treatment on the mixed solution, and filtering supernate through a filter membrane to obtain an extracellular polymeric substance mixed solution; adding magnetite powder into the extracellular polymer mixed solution, stirring under the ultrasonic action until the powder is completely dissolved, adjusting the pH to be neutral, and performing vacuum freeze drying to obtain a first product; mixing the first product, sodium alginate, polyvinyl alcohol and water, and then dropwise adding a calcium chloride solution for gelation treatment to obtain hydrogel beads; and carrying out vacuum freeze drying on the hydrogel beads to obtain the extracellular polymer hydrogel material loaded with magnetite. The material can effectively and stably promote granulation of sludge, effectively solves the recycling problem of excess sludge, and is beneficial to reduction of production cost.

The invention discloses a melt blending preparation process of a semiconductive shielding material for an ultrahigh-pressure crosslinked polyethylene cable, which comprises the following steps: S1, premixing low-density polyethylene and an ethylene-vinyl alcohol copolymer in proportion, the vinyl alcohol chain segment content of the ethylene-vinyl alcohol copolymer being 25%-45%; s2, performing plasma surface treatment on carbon black, and compounding the carbon black with carbon nanotubes to form a conductive filler system; s3, under the protection of inert gas, adding the matrix resin in the step S1 and the conductive filler in the step S2 into a double-screw extruder in stages, and synchronously adding a hindered phenol and phosphite compound antioxidant; and S4, carrying out segmented mixing under the temperature gradient of 160-210 DEG C. Through synergistic compounding of the plasma surface modified carbon black and the carbon nanotubes and in combination with a staged feeding process, directional dispersion of the conductive filler is realized, a three-dimensional interpenetrating conductive network is formed, and the local electric field homogenization capability of the ultrahigh-voltage cable is remarkably improved.

The invention discloses a corrosion-resistant protective sleeve for an aluminum alloy cable and a preparation method of the corrosion-resistant protective sleeve, and belongs to the field of cable protective sleeves. The corrosion-resistant protective sleeve for the aluminum alloy cable is prepared from the following raw materials in parts by mass: 40 to 50 parts of ethylene propylene diene monomer, 15 to 25 parts of fluorinated silicone rubber, 5 to 10 parts of modified thiolated ethylene-vinyl alcohol copolymer, 8 to 15 parts of metal fluoride nanocrystal, 4 to 8 parts of vulcanizing agent, 3 to 8 parts of plasticizer and 3 to 5 parts of flame retardant. The two rubber matrixes are compounded to form a physical barrier layer to prevent corrosion media and water molecules from permeating, material pores can be filled with the metal fluoride nanocrystals, diffusion channels of the corrosion media are reduced, and hydrophobicity and corrosion resistance are improved through cooperation of the metal fluoride nanocrystals and the fluorinated silicone rubber. The modified thiolated ethylene-vinyl alcohol copolymer can improve the compatibility between rubber matrixes and form coordination with metal ions of the metal fluoride nanocrystals, so that the diffusion path of a corrosive medium is prolonged, and the corrosion of the corrosive medium is synergistically blocked.

The invention discloses a preparation method of polyvinyl alcohol-based electromagnetic shielding conductive hydrogel. The preparation method comprises the following steps: (1) preparing a high-concentration dimethyl sulfoxide aqueous solution; adding polyvinyl alcohol into the dimethyl sulfoxide aqueous solution, heating and stirring to completely dissolve the polyvinyl alcohol to obtain a mixed solution; (2) putting the mixed solution after standing into a mold, and freezing at low temperature to obtain PVA gel; (3) an electrolyte salt solution is prepared, and the electrolyte salt solution contains low-concentration dimethyl sulfoxide; and placing the PVA gel in an electrolyte salt solution, and carrying out ion exchange to obtain the polyvinyl alcohol-based electromagnetic shielding conductive hydrogel. The polyvinyl alcohol-based electromagnetic shielding conductive hydrogel prepared by the method has high transparency, strength and ionic conductivity, the light transmittance reaches up to 75.2%, and the compressive strength reaches up to 2.97 MPa when the strain is 80%; the ionic conductivity can reach 10.34 mS / cm; meanwhile, the effective electromagnetic shielding effectiveness (gt; gt) can still be kept at the low temperature of-60 DEG C for more than 60 hours; 30 dB).

The present invention belongs to the technical field of preparation of high-purity rare metal materials, and specifically relates to a method for preparing nano-scale high-purity germanium dioxide. High-purity germanium tetrachloride, polyvinyl alcohol solution and water are prepared, mixed and stirred to form a mixed solution, and then germanium dioxide is extracted through a hydrolysis reaction. The generated high-purity germanium dioxide is then strengthened by ultrasonic waves to prepare nano-scale germanium dioxide, thereby obtaining high-purity germanium dioxide with smaller particle size.

The invention relates to the technical field of single PE eleven-layer composite structure thin film material research and development, and discloses an eleven-layer ultrahigh-barrier polyethylene low-carbon environment-friendly film material and a preparation method thereof.The preparation method comprises the steps that a DOPO-based silane coupling agent is synthesized, the surface of sodium-based vermiculite is modified with the DOPO-based silane coupling agent to obtain flame-retardant modified vermiculite, and the flame-retardant modified vermiculite is modified with the DOPO-based silane coupling agent to obtain the eleven-layer ultrahigh-barrier polyethylene low-carbon environment-friendly film material. And the flame-retardant modified vermiculite is uniformly dispersed in an ethylene-vinyl alcohol copolymer matrix to prepare the flame-retardant barrier material. A flame-retardant barrier material is introduced into a PE co-extrusion film, and an eleven-layer co-extrusion blow molding film forming process is adopted to prepare an eleven-layer composite structure film which is made of a single PE material and has the thickness of 50-200 microns. The invention provides a preparation method of a single PE material eleven-layer composite structure thin film, and an eleven-layer thin film single product is prepared, has excellent barrier performance, belongs to ultrahigh barrier materials, and can be used as an optimal alternative selection in the field of dairy product packaging.

The invention relates to the technical field of pharmaceutical preparations, and provides a minoxidil film coating agent as well as a preparation method and application thereof. The minoxidil film coating agent provided by the invention comprises 40-60% of propylene glycol, 3-7% of polyvinyl alcohol, 20-30% of ethanol, 1-7% of minoxidil and the balance of water. According to the invention, propylene glycol is taken as a solvent, a plasticizer and a transdermal absorption enhancer, polyvinyl alcohol is taken as a film-forming material, and ethanol is taken as a volatile agent, after administration, ethanol is volatilized to promote film formation of polyvinyl alcohol, and propylene glycol enhances the plasticity of the formed film, so that the effect of reducing liquid medicine loss is achieved, the local medicine concentration is increased, and the bioavailability is improved. The minoxidil liniment disclosed by the invention has excellent skin permeability, can effectively convey a medicine to a required part, and can ensure that the medicine is released at a fixed position of the skin and is accurately administered in a medicine release process, so that the stimulation of liquid medicine flow to other parts is reduced, and a good treatment effect is achieved.

The invention discloses a fly ash-based adsorbent as well as a preparation method and application thereof, and belongs to the technical field of adsorbent materials. The fly ash-based adsorbent is prepared from the following raw materials: modified fly ash, modified lignin, activated carbon, polyethylene glycol polyvinyl alcohol grafted copolymer, titanate and metal oxide. The coal ash is subjected to ball milling and acid modification treatment, and a surfactant is introduced, so that the adsorption sites and the adsorption efficiency of the coal ash are increased. Through the synergistic effect of the raw materials, the prepared fly ash-based adsorbent can efficiently adsorb fluorine ions in wastewater, and the fluorine ion removal rate can reach 99% after adsorption is performed for 30 min.

The invention belongs to the technical field of sole materials, and particularly relates to a quick-rebound fatigue-resistant sole foaming composite material and a preparation method thereof. According to the invention, the alpha-olefin ethylene copolymer and the modified ethylene-vinyl alcohol copolymer are mixed in an internal mixer, and hydroxyl groups of the modified ethylene-vinyl alcohol copolymer and the alpha-olefin ethylene copolymer form a hydrogen bond cross-linked network under the action of high-temperature shearing; a blend obtained through mixing, high-branching-degree polyolefin, modified nano-zinc oxide I and an auxiliary agent are added into a double-screw extruder for extrusion, the modified nano-zinc oxide is embedded into branching points of the high-branching-degree polyolefin, molecular chain slippage is limited through a pinning effect, the fatigue life of the composite material is prolonged, and the composite material is suitable for large-scale production. The preparation method comprises the following steps: preparing a foaming material, mixing the foaming material with azodicarbonamide, an antioxidant 1010 and the like, injecting the mixture into a supercritical device, effectively improving the density gradient, rebound resilience and mechanical properties through segmented pressure relief, and finally performing hot-pressing shaping to form the quick-rebound fatigue-resistant sole foaming composite material.

The application discloses a kind of imitated plant leaf hydrogel composite material and preparation method thereof, belong to bionic composite material field.The application first by colorant compounding preparation printing paste, and fabric is printed, obtain the green fabric that can realize to plant leaf " green peak " and " red edge " spectral characteristic simulation, and with green fabric simulation leaf structure in fence organization and skeleton;Then with biomaterial polyvinyl alcohol (PVA) as base material, join with strong hygroscopic monomer and crosslinking agent, initiator blend preparation hydrogel prepolymer solution;Finally, hydrogel prepolymer solution is poured into the mold containing green fabric and copolymerization, it directly forms hydrogel in fabric surface and pore interior, obtains imitated plant leaf hydrogel composite material.The material gets rid of the dependence on hygroscopic salt, has water absorption and simulation effect stable, durability is good and the like advantages.

The invention relates to the technical field of water pollutant removal, in particular to a UiO-66 / sodium carboxymethyl cellulose / polyvinyl alcohol / melamine sponge composite material and a preparation method and application thereof.The preparation method comprises the steps that zirconium chloride and terephthalic acid are dissolved in an organic solvent to obtain a mixed solution, the mixed solution is transferred into a reaction kettle, and through solvothermal reaction, the UiO-66 / sodium carboxymethyl cellulose / polyvinyl alcohol / melamine sponge composite material is obtained; the preparation method comprises the following steps: preparing UiO-66 powder; putting UiO-66 powder into the sodium carboxymethyl cellulose solution, and uniformly stirring the UiO-66 powder and the sodium carboxymethyl cellulose solution to obtain a UiO-66 / CMC mixed solution; placing the UiO-66 / CMC mixed solution in a polyvinyl alcohol solution, and uniformly stirring the UiO-66 / CMC / PVA mixed solution to obtain a UiO-66 / CMC / PVA mixed solution; the preparation method comprises the following steps: dipping a melamine sponge in a UiO-66 / CMC / PVA mixed solution to obtain an adsorption saturated melamine sponge; the UiO-66 / CMC / PVA / coated MS composite material is obtained by repeatedly freezing and thawing the adsorption saturated melamine sponge for multiple times and then freeze-drying, the composite material can be used for rapidly, efficiently and selectively removing phosphate or fluorine ions and the like in water and is convenient to separate and recycle, and a new thought is provided for development of efficient water treatment adsorbent materials.

To provide a plastic-degrading microorganism.SOLUTION: In one aspect, the present disclosure provides a microorganism capable of degrading plastic, belonging to a genus selected from the group consisting of the genus Acinetobacter, the genus Achromobacter, the genus Pseudomonas, the genus Serratia, the genus Amycolatopsis, and the genus Bacillus. In one aspect, the plastic to be degraded comprises at least one selected from polypropylene (PP), polyethylene (PE), polyvinylidene chloride (PVDC), and ethylene-vinyl alcohol copolymer (EVOH).SELECTED DRAWING: None