58 results about "Polyvinyl alcohol" patented technology

The invention relates to a solid-type filter stick formed by granular assembling and a preparation method of the solid-type filter stick. The filter stick is prepared by the assembling forming of solid granules and an adhesion agent, wherein the solid granules are one or more of natural plant granules, natural mineral granules and artificial adsorption granules. The adhesive agent is one or more of ethylene-vinyl acetate copolymer, polyethylene hot melt adhesive, epoxy resin, polyester, polyether, polyurethane, dextrin, polyvinyl alcohol, polycaprolactone, gelatin and Arabic gum. The mass ratio of the solid granules and the adhesive agent is 0.5-200:1. The filter stick is prepared by the bonding forming after the solid granules and the adhesive agent are mixed, is loosened, breathable and stable in structure, and can be used as a unitary filter tip or can be combined with other filtering materials to form a multi-component filter tip. The preparation method is simple in process and high in production stability. The filter stick is novel in appearance and structure, stable in structure, excellent in incision performance, wide in material selection range, good in filtering effect and capable of effectively improving the smoking quality of cigarettes.

The invention relates to a high-strength and high-modulus polyvinyl alcohol fiber and a melt spinning method of the high-strength and high-modulus polyvinyl alcohol fiber. The method comprises the following steps that polyvinyl alcohol, water and polyatomic alcohol are subjected to full swelling after being uniformly mixed; the polyvinyl alcohol subjected to the full swelling is added into a double-screw-rod extruding machine and is then subjected to full fusion to be extruded, and melt fine flows form a primary fiber after air blowing cooling; and the prepared primary fiber is subjected to the drying by a hot air drying oven, multistage stretching and tense heat setting to form the polyvinyl alcohol fiber. The preparation method of the prepared polyvinyl alcohol fiber has the advantage that through the hydrogen bond compounding among water molecules, polyatomic alcohol and polyvinyl alcohol molecules, the melt spinning and the high-power stretching of the polyvinyl alcohol are realized. The polyvinyl alcohol fiber prepared by the preparation method has the advantages of fiber degree controllability, high strength and high modulus, and can be widely applied to the field of civil engineering concrete.

The invention relates to the technical field of cell culture, and in particular to a serum-free culture medium, a preparation method thereof and a culture method of mesenchymal stem cells. The culturemedium consists of the following components: non-essential amino acid, glutamine, hydrocortisone, dexamethasone, polyvinyl alcohol, recombinant human insulin, recombinant human transferrin, a recombinant human epidermal growth factor, a recombinant human basic fibroblast growth factor, a recombinant human Wnt-3a protein, a recombinant human fibronectin, recombinant human laminin, L-glutathione, L-ascorbic acid, beta-mercaptoethanol, ethanolamine, Pluronic F-68, Tween 80, cholesterol, adenine, sodium selenite and a basic culture medium. According to the invention, polyvinyl alcohol can replaceserum albumin in a serum-free culture medium in carrier function, so that proliferation capacity of mesenchymal stem cells is effectively improved. Polyvinyl alcohol has more stable performance thanserum albumin, and the problem that proliferation capacity and passage capacity of stem cells are reduced can be effectively solved.

The invention belongs to the technical field of concrete. The invention relates to recycled concrete and a preparation method thereof. The recycled concrete comprises the following raw materials in parts by weight: 150-200 parts of a recycled concrete aggregate, 400-450 parts of cement, 700-800 parts of sand, 1000-1100 parts of stones, 120-150 parts of mineral powder, 50-100 parts of fly ash, 3-7parts of an expanding agent, 5-10 parts of a tackifier, 4-8 parts of a water reducing agent and 150-200 parts of water. Concrete waste is subjected to crushing, hydrochloric acid solution soaking, sodium silicate solution soaking and polyvinyl alcohol solution soaking to prepare the recycled concrete aggregate, and gaps of the concrete waste are filled, so that the mechanical property of the recycled concrete aggregate is improved. The recycled concrete prepared in the invention has excellent mechanical properties, and is suitable for constructional engineering with high requirements on concrete.

A thermoplastic polymer composition which is excellent in flexibility, mechanical properties, and moldability, capable of adhering to ceramics, metals, and synthetic resins without a treatment with a primer, and exhibits a high adhesion strength even when exposed to a high temperature environment, and a molded product obtained by using the thermoplastic polymer composition. The thermoplastic polymer composition includes 100 parts by mass of a thermoplastic elastomer (A), 1 to 100 parts by mass of a polyvinyl acetal resin (B), and 0.1 to 300 parts by mass a softener (C). The thermoplastic elastomer (A) is a block copolymer including a polymer block constituted by aromatic vinyl compound units and a polymer block constituted by conjugated diene units or a hydrogenated product of the block copolymer. The polyvinyl acetal resin (B) has a glass transition temperature of 80 to 130° C.

The invention relates to a selenium-containing coating agent for a sustained release fertilizer special for selenium-rich agricultural products and a preparation method for the selenium-containing coating agent. The selenium-containing coating agent contains the following components: cellulose, polyvinyl alcohol, acrylic resin, epoxy resin, a crosslinking agent, an emulsifying agent, an initiator, selenite and deionized water. The invention also provides a method for preparing the selenium-containing coating agent. Selenium is dispersed in a coating agent, and the selenium is slowly released;and the prepared sustained release fertilizer can meet the requirements of the selenium-rich agricultural products in all growth periods through one-time application, solves that problems that a selenium-enriching agent is required to be sprayed on leaf surfaces for multiple times to cause high labor consumption and human poisoning is caused by improper spraying, and also overcomes a defect that the utilization rate of a selenium-enriching fertilizer through soil application is low. The sustained release fertilizer prepared from the coating agent has effects of improving fertilizer utilization rate, increasing crop yield and reducing environmental pollution.

The invention provides a three-dimensional wrinkle polylactic acid microballoon and a preparation method and uses thereof. The preparation method of the three-dimensional wrinkle polylactic acid microballoons is as follows: adopting ammonium bicarbonate deionized water solution of Fe3O4@ SiO2 nanoparticles as an inner phase, dichloromethane solution of polylactic acid as an interphase, deionized water solution of polyvinyl alcohol as an outer phase, and obtaining the three-dimensional wrinkle polylactic acid microballoons. The gas produced by the ammonium bicarbonate introduces mismatched stresses at emulsion interface, the nanoparticles added in the emulsion introduce multiple-gasification cores, and the three-dimensional wrinkle polylactic acid microballoons are successfully prepared and used in oil water separation and cell adsorption. The three-dimensional wrinkle polylactic acid microballoons are in multi-stage porous structure which can effectively increase specific surface area and can be used effectively in oil-water separation, and has good bio-compatibility which can be used in effective cell adhesion. The three-dimensional wrinkle polylactic acid microballoons have an excellent prospect in bio-application.

The invention discloses a novel electrostatic removal agent for textile materials and a preparation method of the novel electrostatic removal agent. The material is prepared from the following components in parts by weight: 10-20 parts of sodium alginate, 5-10 parts of poly(dimethylsiloxane) divalent quaternary ammonium, 3-6 parts of polyvinyl alcohol, 1.5-3 parts of ethoxylated alkyl ammonium sulfate, 0.8-1.4 parts of poly(methylcyclotetrasiloxane), 0.5-2 parts of acetic acid aqueous solution and 100-150 parts of deionized water. The invention also provides a method for preparing the novel electrostatic removal agent. The method comprises the following steps: (1) adding 10-20 parts of sodium alga acid, 5-10 parts of poly(dimethylsiloxane) divalent quaternary ammonium, 3-6 parts of polyvinyl alcohol and 1.5-3 parts of ethoxylated alkyl ammonium sulfate into 100-150 parts of deionized water, and uniformly stirring at the temperature of 55-70 DEG C; and (2) slowly adding 0.5-2 parts of the 0.5-2 parts of acetic acid aqueous solution, adding 0.8-1.4 parts of polymethylcyclotetrasiloxane under heating conditions, and uniformly stirring, thereby obtaining the electrostatic removal agent for textile materials.

The invention provides a preparation method for polyvinyl alcohol/silicon dioxide composite microspheres and belongs to a preparation method for a composite microsphere material. Polyvinyl alcohol and tetraethyl orthosilicate are employed as raw materials, and polyvinyl alcohol/silicon dioxide (PVA/SiO2) composite microspheres are prepared in a water-in-oil system without any surfactants. Tetraethyl orthosilicate is hydrolyzed fully in a PVA solution in an acidic condition, and uniform PVA/SiO2 composite sol is formed; the sol is subjected to dispersion and crosslinking in a water-in-oil system without surfactants, and finally PVA/SiO2 composite microspheres are obtained. The technology is simple, the repeatability is good, energy consumption is low and the cost is low. Surfactant residual and agglomeration of nano inorganic particles in the process of preparing composite microspheres through a traditional emulsification method are avoided. The microspheres are advantaged by regular sphere, high dispersibility and uniform microstructure, and can be used as a drug carrier, an injection-type bone tissue repairing material or a heavy metal ion adsorption material.

The invention discloses a calcium carbonate compound type flame-retardant foaming agent. The technical scheme of the foaming agent is characterized in that the calcium carbonate compound type flame-retardant foaming agent comprises light calcium carbonate, attapulgite clay powder having an air purification function, hydrogen peroxide, magnesium hydrate, sodium alcohol ether sulphate, superfine polyving akohol powder, dimethicone and water. Calcium carbonate compound type flame retardant foaming agent paste ingredients are stirred into a paste, and then the ingredients of the calcium carbonate compound type flame-retardant foaming agent are stirred into a finished product of the calcium carbonate compound type flame-retardant foaming agent. After the calcium carbonate compound type flame retardant foaming agent is stirred with water at a high speed, porous foamed slurry is formed and can rapidly isolate an inflammable material from being contacted with air, and the purposes of inflaming retarding and extinguishment are achieved; a product produced with the calcium carbonate compound type flame-retardant foaming agent not only has the effects of inflaming retarding, heat preservation, thermal insulation and sound insulation, but also has the air purification function; and the calcium carbonate compound type flame-retardant foaming agent is suitable for producing inflaming retarding and fire-extinguishing products, lightweight boards, lightweight walls and noise reduction products.

The present invention provides an aqueous porcelain imitating coating material, which comprises the following components, by weight, 20-30 parts of a water-soluble polyvinyl alcohol emulsion, 15-25 parts of titanium dioxide powder, 15-25 parts of calcium carbonate, 0.5-0.7 part of methyl cellulose, 0.3-0.5 part of ethyl cellulose, and 65-75 parts of distilled water. The aqueous porcelain imitating coating material of the present invention has the following technical effects that: the coating material belongs to a high gloss coating material, no brick seam exists after dyeing with the coating material, the whole effect is good, and the coating material has the same characteristics as the characteristics of water resistance, alkali resistance, scrub resistance, and the like of the porcelain tile.

The invention discloses a weather-resistant impact-resistant waterproof plugging material with stable quality. The material comprises the following raw materials by weight: 1-2 parts of a water reducing agent, 15-25 parts of polyvinyl alcohol, 10-20 parts of a tackifying promoter, 30-40 parts of a polyurethane prepolymer, 20-30 parts of a magnesium acrylate emulsion, 10-16 parts of ore filling, 3-5 parts of white carbon black, 2-4 parts of a nanometer additive, 5-9 parts of dispersible adhesive powder, 3-7 parts of a weather-resistant aid, 10-14 parts of reinforced fibers and 10-12 parts of water. The waterproof material provided by the invention has the characteristics of stable performance, resistance to cold and heat impact, aging resistance, no cracking, no deformation and superior waterproof performance and impermeability; the material has excellent impact fatigue resistance in outdoor usage and can effectively resist high-frequency repeated impact by heavy rain and hail; the raw materials of the material are safe, reliable, friendly to environment, easily available and cheap; the preparation method for the material is simple; so the material provided by the invention has high practical value and good application prospects.

Curved lenses configured to decode three dimensional content and method of fabricating the same. The lenses comprise a polyvinylalcohol polarizer film laminated with triacetate on both sides, wherein the polarizer film has a polarizing efficiency equal to or exceeding 99% and a transmittance percentage equal to or exceeding 35% and a retarder film (e.g., norbornene copolymer resin) laminated on a front surface of the polyvinylalcohol polarizer film laminated with triacetate and aligned to produce a desired circular polarization responsive to specified retardation wavelengths.

The invention provides a method for preparing flowerlike nanometer cobalt by using electro-conductive glass FTO, an anodised aluminum template (AAO) and an aqueous high-molecular adhesive as a combined electrode. The method comprises the following steps: (1) preparation of a working electrode: a step of coating the electro-conductive glass with a solution of the aqueous high-molecular adhesive--polyvinyl alcohol (PVA) through spin coating and bonding the anodised aluminum template so as to obtain the FTO/PVA/AAO combined electrode; (2) preparation of an electrolyte: separately preparing cobaltous sulfate and a boric acid solution and mixing the cobaltous sulfate with the boric acid solution; (3) electrodeposition reaction: a step of carrying out constant-voltage electrodeposition on the combined working electrode; and (4) post-treatment: a step of soaking the working electrode having undergone electrodeposition in sodium hydroxide to remove the anodised aluminum template. According to the invention, FTO/PVA/AAO is used as the combined working electrode and constant-voltage electrodeposition is carried out so as to prepare the novel flowerlike nanostructured cobalt; and the method is simple and fast and has the advantages of mild reaction conditions, short time, high efficiency and no need for high temperature and high pressure conditions compared with conventional methods.

The invention relates to a preparation method for in-situ forming of a hexagonal phosphorspath coating on the surface of a titanium-based nanotube. The preparation method comprises the following steps: firstly, forming a titanium nanotube on the surface of a titanium material by using electrochemical anodic oxidation; secondly, preparing a polyvinyl alcohol aqueous solution of calcium salt, putting a sample into the polyvinyl alcohol aqueous solution of the calcium salt, carrying out vacuum treatment and drying; slowly raising the temperature for sintering and immobilizing calcium in or on thesurface of the titanium nanotube; thirdly, vertically putting the titanium-based nanotube subjected to calcium treatment into a prodromal calcium and phosphorus solution containing urea; adding urease, and controlling temperature and reaction time, to obtain an apatite crystal coating on the surface of the titanium-based nanotube. According to the preparation method for the in-situ forming of thehexagonal phosphorspath coating on the surface of the titanium-based nanotube, disclosed by the invention, the hexagonal phosphorspath coating on the surface of the titanium can be rapidly formed under mild conditions; the preparation process has the advantages of stability, low cost and capability of rapidly realizing mass production. The preparation method for in-situ forming of the hexagonal phosphorspath coating on the surface of the titanium-based nanotube, disclosed by the invention, has broad application value in bone implant materials, surface modification of dental implant, promotionof rapid bone integration and the like.

The invention discloses corrosion-resistant thermal insulation mortar which is characterized by being prepared from the following raw materials in parts by weight: 320-380 parts of cement, 200-250 parts of kaolin, 220-260 parts of waste incinerator slag, 100-140 parts of quick lime, 210-260 parts of waste glass slag, 140-190 parts of coarse sand, 7-9 parts of glass fiber, 9-12 parts of 0.5-5mm wood fiber, 60-90 parts of wood saw powder, 60-80 parts of tobacco straw, 3-7 parts of polyvinyl acetal and 4-6 parts of auxiliaries. The thermal insulation mortar prepared by the invention is low in heat conductivity coefficient, stable in thermal insulation property, high in compressive strength, corrosion-resistant, anti-aging and suitable for thermal insulation of various walls.

The invention discloses bamboo plywood and a preparing method thereof, and belongs to the field of building materials. The method comprises the steps that according to weight parts, raw materials are obtained, the phenolic resin 2124, polyvinyl alcohol, nonylphenol polyoxyethylene ether and a diluent are stirred and mixed, a phenolic resin adhesive is obtained, then a filter cake is placed in the phenolic resin adhesive for gum dipping and dried, gum-dipped bamboo skin is obtained, the gum-dipped bamboo skin is placed in a hot press machine which uses steam as a hot source, a blank is obtained by pressing, the blank is cooled, and the bamboo plywood is obtained. The bamboo plywood and the preparing method thereof have the beneficial effects that the bamboo plywood has good glue strength, after being used, the bamboo plywood is not prone to warping, deforming or degumming, and the bamboo plywood is worthy of being used and promoted.

The invention relates to the field of concrete production, and particularly discloses high-ductility concrete as well as a preparation method and equipment thereof. The high-ductility concrete is prepared from coarse aggregate, fine aggregate, quartz sand, cement, water, coal ash, coumarone resin, polyvinyl alcohol fiber, permanganate and a water reducing agent. The preparation method comprises the following steps: firstly, adding the cement, the quartz sand, the fly ash, the coarse aggregate, the fine aggregate, the polyvinyl alcohol fiber and the coumarone resin into a stirrer for mixing to obtain a first mixture, then mixing and stirring the water reducing agent and the water to obtain a second mixture, then adding the permanganate into the second mixture to obtain a third mixture, and finally, adding the third mixture into the first mixture to obtain the high-ductility concrete. The equipment comprises a rack, a stirring barrel, a stirring assembly, a driving mechanism, a scraping assembly and a lifting assembly. The high-ductility concrete has the effects of enhancing the overall mechanical property of the high-ductility concrete and widening the application range of the high-ductility concrete.

The invention relates to a degradable capacitor plastic shell which is composed of the following components in parts by weight: 35 parts of polyvinyl alcohol resin, 15 parts of gelatin, 10 parts of methyl-silicone rubber, 5 parts of hyaluronic acid, 5 parts of tribasic lead sulfate, 5 parts of nano silicon dioxide, 5 parts of modified wood-plastic powder, 2 parts of chlorinated paraffin, 2 parts of propanediol, 2 parts of palm oil, 5 parts of carbon fiber, 5 parts of metallocene polyethylene, 2 parts of methylsilicone oil, 0.5 part of tobacco cellulose, 2 parts of plasticizer, 2 parts of oxidized polyethylene, 2 parts of dioctyl adipate, 2 parts of rare-earth light conversion agent, 2 parts of cotton fiber, 2 parts of corn starch, 2 parts of polyester rubber powder, 2 parts of butyl acetate and 2 parts of talcum powder. The method has the advantages of simple components and low cost; the finished product is degradable, has stable performance, and does not have toxicity or harm in a high-temperature environment; and meanwhile, by changing the traditional preparation technique and adding the refrigeration procedure, the product has higher safety and still has favorable stability at higher temperature.

The invention discloses a zirconium boride contained fused quartz ceramic material and a preparation method thereof. The preparation method comprises the following steps: mixing 95.0-99.7wt % of fused quartz powder and 0.3-5.0% of zirconium boride powder respectively, then adding ethanol or water, stirring to form slurry with flowability, dealcoholizing or dehydrating and drying to obtain a mixed dry powder; adding a polyvinyl alcohol solution into the mixed dry powder, stirring and mixing, sieving, and then, placing the mixture into a sealed plastic bag, ageing for 3-4 hours to obtain a blank to be subjected to compression molding; drying the blank after the blank is subjected to compression molding; sintering the dried blank at the temperature of 1300-1400 DEG C to obtain the zirconium boride contained fused quartz ceramic material. The thermal expansivity of the fused quartz ceramic material to which the zirconium boride is introduced is greatly reduced, so that the zirconium boride has a remarkable inhibiting effect for the crystallization of fused quartz, and the zirconium boride contained fused quartz ceramic material is a high-temperature structural ceramic material with higher safety and reliability.