651 results about "Nano titania" patented technology

The present invention relates to one kind of composite biological adsorbent and its preparation process. The adsorbent is chitosan or dextran cross-linked resin with supported titania photocatalyst and surface heavy metal ion blotting, and has the functions of adsorbing heavy metal ion, and degrading and eliminating organic pollutant, pathogen and microbe from water solution. The adsorbent is prepared through cross-linking and supporting titania photocatalyst onto chitosan and other saccharide biomass, coupling molecular engram with nanometer titania photocatalyst to form surface heavy metal ion blotting in the surface. The adsorbent has high adsorption capacity, high heavy metal selectivity, and high capacity of degrading and eliminating organic pollutant, pathogen and microbe.

The invention discloses a preparation method of a composite functional fabric with antimicrobial, anti-ultraviolet, deodorization and self-cleaning functions. The preparation method comprises the steps of preparing an activated modified treatment liquid, preparing a nano-titania dispersion liquid, processing fabrics by virtue of the activated modified treatment liquid, processing the fabrics by virtue of the nano-titania dispersion liquid, and the like. After the composite functional fabric is processed, the UPF value is more than 100, the deodorization rate is more than 95%, the photocatalysis self-cleaning fading rate of the composite functional fabric to chili oil is 96.7%, and the antibacterial rate (to staphylococcus) is 98.6%; after the composite functional fabric is washed for ten times in families, the UPF value is more than 50, the deodorization rate of the composite functional fabric to substances (including ammonia gas, formaldehyde, acetaldehyde, sulfureted hydrogen, nicotine and trimethylamine) is more than 90%, the photocatalysis self-cleaning fading rate of the composite functional fabric to chili oil is 93.9%, and the antibacterial rate (to staphylococcus) is 95.8%.

The invention discloses a mesoporous nano titania coating with the functions of high-efficiency antibacterium and air purification. The compositions of the coating in percentage by weight are 1 to 10 percent of mesoporous nano titania, 20 to 60 percent of solvent, 20 to 55 percent of film-forming resin, 0.02 to 10 percent of dispersant and other auxiliary agent, and 10 to 30 percent of inorganic pigment filler. The coating takes the mesoporous nano titania or a modifier of the mesoporous nano titania as an active ingredient, has the functions of high-efficiency antibacterium and air purification after curing and film forming, can be widely applied to an internal wall and an external wall of a building. The mesoporous nano titania coating has simple preparation method and wide pollutant purification scope, has an eradicative rate of more than 85 percent on Escherichia coli, Staphylococcus aureus and Candida albicans within 1 hour, has a degradation rate of more than 90 percent on formaldehyde, benzene and toluene, can be excited to generate photocatalysis by faint ultraviolet light in sunlight or illumination light, and still has obvious effect on degradation of low-concentration pollutant.

The multifunctional green nano paint consists of mainly: quaternary methacrylic acid-butyl acrylate-styrene-methyl methacrylate copolymer emulsion 20-65 wt%; nano titania 0.3-5 wt%; nano zinc oxide 0.2-3 wt%; silica 0.3-3 wt%; nano calcium carbonate 0.5-5 wt%; deionized water 3-12 wt%; superfine talcum powder 1-3 wt%; superfine calcium carbonate 3-15 wt%; titanium white3-25 wt%; and assistants including dispersant, wetter, rheologic agent, thickener, color paste, defoaming agent, etc. 2-12 wt%. The paint of the present invention features no toxicity, no pollution, wash resistance, scratching resistance, ultraviolet resistance, ageing resistance, waterproofing and mould proofing as well as self-cleaning function, so that the paint may be used wide in the decoration of inner and outer walls and the anticorrosive treatment of metal material surface.

The present invention relates to the preparation of high activity TiO2 photocatalyst with porous ceramic base, and is especially the nano titania powder and titania sol combining process of preparing regenerable high activity nano titania carried in porous ceramic. The present invention prepares the high activity nano titania carried in porous ceramic through the combination of two carrying processes, titania powder sintering process and sol-gel process. The process includes preparing titania sol via sol-gel process, mixing titania sol and titania powder in certain ratio while stirring and adding dispersant and adhesive to form new solution, carrying the solution to the surface of porous ceramic, fumigating the carrying ceramic in water vapor atmosphere to eliminate most of the organic matters, and final sintering at high temperature for strong combination between nano titania and carrier and raised activity of titania.

The composite of the cellulose and the nanometer titanium oxide and its preparation method and use are disclosed. It is produced by: making the suspending liquid by dispersing the nanometer titanium oxide particle into the 7-8% NaOH and 10-13% urea(wt%), adding in the cellulose after cooling it down to -8--15deg.C , stirring at the room temperature, scraping pellicle and spraying filament after filtering and degassing, solidifying and revivifying in the coagulator. It features: the intensity, the braking extensibility, flexibility of the pellicle and filament of the regenerated cellulous remains in the cellulose and the nanometer titanium oxide, endowed the new functions such as antisepsis activity and absorption of the ultraviolet ray. Its advantages include: easy process, no pollution of dissolvent, convenient operation, low cost, and high intensity of the composite.

The building paint consists of water, hydroxyethyl cellulose, diisobutylsulfo sodium succinate, epoxyvinyl alkylphenol ether, methyl silicon oil, propylene glycol, nano titania assistant and other nine kinds of components. The nano composite weather-resisting titania building paint for outer wall can absorb and scatter ultraviolet ray, and has powerful antiageing performance and wide application.

The present invention discloses a kind of fabric containing nano titania mixture and thus self-cleaning function. The titania mixture inside or between the fiber of the fabric contains TiO2 in 0.1-2 wt%. The nano level TiO2 powder is used as photocatalytic material, prepared into reverse emulsion and fixed onto the surface of fiber material via supercritical CO2 processing mode. The fabric containing nano level TiO2 powder is used in bedding, berth cover, curtain, etc. and under the photocatalysis of ultraviolet light in sunlight or lamp light, TiO2 will produce photocatalysis effect to decompose formaldehyde and other harmful gas, purify inside air and provide comfortable health life environment.

The invention discloses environment-friendly diatom emulsion interior wall decorative material. The environment-friendly diatom emulsion interior wall decorative material comprises, by mass ratio, 9%-15% of diatomite, 6%-10% of attapulgite powder, 7%-10% of calcined kaolin, 1.7%-3% of titanium dioxide, 0.2%-0.4% of nano-titania, 5%-9% of calcite powder, 0.3%-0.4% of carboxy methyl cellulose, 0.3% of flatting agent, 0.3% of dispersant, 0.3% of preservative, 0.6%-1.2% of mildew preventive, 8%-12% of re-dispersible emulsion powder, and the balance of distilled water. The invention also discloses a preparation method of the environment-friendly diatom emulsion interior wall decorative material. The preparation method includes proportionally adding the ingredients into a dispersing barrel, using a high-speed disperser to evenly disperse, and filtering to obtain the finished product. The preparation method of the environment-friendly diatom emulsion interior wall decorative material is simple, construction is simple and convenient, materials are saved, and the environment-friendly diatom emulsion interior wall decorative material is higher in efficiency of absorbing harmful matters in air.

The preparation process of nano titania particle includes the following steps: dissolving titanium tetrachloride or tetrabutyl titanate in ethanol to form titanium-containing ethanol solution; dissolving at least one of PVA, polyglycol and polyacrylic acid of molecular weight 200-30000 in deionized water to form hydrolyzed solution; dropping the hydrolyzed solution into the titanium-containing ethanol solution and dropping the solution into organic solvent with emulsifier via stirring and ultrasonic dispersing to form emulsion and precipitate; centrifugal separation, washing with deionized water, freeze drying and of the precipitate; and heat treatment at 400-800 deg.c for 0.5-2 hr. The said process can prepare titania particle of 15-100 nm granularity, homogeneously distributed granularity and no aggregate. The nano titania particle may be rutile phase or anatase phase depending on the different heat treatment temperature.

The invention discloses a preparation method of antibacterial and anti-ultraviolet fiber / fabric loaded with nano-titania. The preparation method comprises the following steps: dissolving butyl titanate in an organic solvent, adding the fiber / fabric in the solvent and carrying out adsorption processing; and placing the fiber or fabric after the adsorption processing in air for drying, or processing the fiber / fabric in water, thus obtaining a product. According to the invention, butyl titanate is adopted as a nano-titania precursor, the nano-titania is generated through adsorption, in situ hydrolysis and polymerization of the butyl titanate on the surface of cotton fabric and nanopores in the cotton fabric, so that the preparation method is simple in operation, high in raw material availability, does not need any acidic raw materials, and can avoid the damage to the strength of the fiber and fabric. The product prepared by the method disclosed by the invention has soft handfeel, durable antibacterial and anti-ultraviolet performances and can be washed for multiple times.

The invention relates to a preparation method of a nano-fiber supported nano-titania mesoporous material. The preparation method adopts biomass cellulose nano-filaments having a large specific surface area and a high length-diameter ratio as a carrier, and allows nano-titania to be grafted to the surfaces of nano-fibers through a sol-gel reaction by means of a hydrogen bond. The nano-fibers interlace with each other in an aqueous solution to form a netted structure, so an effective reaction area can be provided, the rapid nucleation growth of gel titania particles can be prevented, and the full reaction of the gel titania particles with hydroxy groups on the surfaces of the fibers is promoted. The mesopore diameter can be adjusted through controlling the content of water in a mixed system, so the mesoporous composite aerogel material having the advantages of strong mechanical performances, good load effect and large specific surface area is obtained. The method has the advantages of simple operation, strong controllability, and wide raw material source, and is an efficient, environmentally-friendly and sustainable processing means.

The invention discloses a nano-fiber anti-microbial fruit-vegetable preservative film with a porous structure, and a preparation method and application. According to the invention, myoporum bontioides leaves are grinded into powder and treated by supercritical extraction, so that a myoporum bontioides extract is obtained; a water solution containing TWEEN-80 is added into the myoporum bontioides extract, and the mixture is filtered, so that a myoporum bontioides supercritical extract solution is obtained; the myoporum bontioides supercritical extract solution, a polyvinyl alcohol solution, a chitosan derivative solution and a nano-titania solution are mixed, so that a mixed spinning solution is obtained; and the mixed spinning solution is treated by spinning of a static spinning machine, so that the nano-fiber anti-microbial fruit-vegetable preservative film with the porous structure is obtained. The preservative film has the advantages of a large specific area, a high porosity, high finger uniformity, good mechanical properties and the like, also has performance such as a good moisture permeable and gas permeable property and a good moldproof and anti-microbial property, and has high application potential in the food packaging field.

The invention belongs to a synthesis method for preparing nano-titania sol and powder, and in particular relates to a synthesis method for preparing rutile nano-titania sol or powder at a low temperature. The synthesis method comprises: dissolving a mineralizer into an aqueous solution containing titanium salt, obtaining the mineralizer-doped aqueous solution containing the titanium salt, using inorganic alkali to adjust the pH value of the solution to be between 5 and 11 or using water to dilute the mineralizer-doped aqueous solution containing the titanium salt or heating the mineralizer-doped aqueous solution containing the titanium salt, and obtaining composite titanate deposit; using superoxol to disperse the composite titanate deposit into solution state, and adjusting the pH value of the composite titanate solution; adjusting the pH value to be more than 1 in order to obtain the sol; adjusting the pH value to be less than or equal to 1 in order to obtain the powder; heating the solution; obtaining the yellow orange transparent or semitransparent nano titania sol when the pH value is more than 1; and obtaining white deposit when the pH value is less than or equal to 1, and obtaining the nano titania powder after centrifugation or filtration. The synthesis method greatly reduces the cost and simplifies the technology.

The invention relates to a method for preparing anatase nano titania, which relates to the chemical product preparation technical field. The method adopts a metatitanic acid produced by the sulfuric acid method as a raw material; depolymerizing agents are added into the metatitanic acid and reacted with a sulfuric acid in the metatitanic acid so as to depolymerize the metatitanic acid; micron secondary agglomerated particles of the metatitanic acid are depolymerized into nano primary positive particles; and anatase nano titania products are prepared with low cost after subsequent procedure treatments of gel coagulation, filtration, washing, calcination, crushing and so on of the processed metatitanic acid. The method has a simple technique and the anatase nano titania is high in purity; and the three wastes are small in amount and convenient to recover, and no emission of waste gas and liquor can be reached completely, thereby the complete environment-friendly industrial standard can be realized. Moreover, the method can manyfold reduce the manufacturing cost of the nano titania products, thereby having great promotion value and wide market prospect.

The prepn. steps are: creating amorphous neutral titanium oxide pulp material by chemical method, washing chlorion to less than 50 ppm by deionized water, proceeding ultrasonic dispersion to the pulp after adding lanthanum nitrate or zinc ferrite then senting the pulp into reaction boiler, increasing temp. to 80-200 deg.C, taking it out after being crystallized 8-72 hours, the nanometre titanium dioxide sol with photochemical function is produced. The sol has good water-solubility, 99.9 percent bactericidal ratio with 0.8 percent density and on condition of natural lighting.

The invention belongs to the field of textiles and in particular relates to a colored spun yarn with an antibacterial function, a fabric and a preparation method thereof. The loose fibers used by the functional colored spun yarn are modified by a modifier; the count of the functional colored spun yarn is single yarn or compound yarn of 10-60S; the twist of the single yarn is 300-1300 twist per meter; the twist of the compound yarn is 150-1300 twist per meter; and the modifier consists of nano-silver, chitosan and nanometer titania. The weight ratio of the nano-silver to chitosan to titania is 1:(10-300):(12-50). The invention further provides a colored spun fabric which is prepared from the functional colored spun yarn. Therefore, the colored spun fabric has excellent ultraviolet resistance and antibacterial performance.

The invention discloses high-wear-resistant antibacterial acrylate paint. The high-wear-resistant antibacterial acrylate paint is prepared from the raw materials: an aqueous acrylate emulsion, alkyd resin, organosilicon modified unsaturated polyester resin, silica sol, cellulose acetate butyrate, polyvinyl pyrrolidone, modified nano-titania, calcium carbonate whiskers, octadecyl trimethyl ammonium chloride modified montmorillonite, hollow glass beads, zinc oxide, ethylene glycol mono-n-propyl ether, di-propanediol butyl ether, triethylene glycol monoethyl ether, an anti-settling agent, a humectant, an antifoamer, per-methoxylation melamine resin, 3,5-dimethyl-2-aminobenzoic acid, trimethylaniline, a leveling agent, vinyl triethoxysilane and deionized water. The high-wear-resistant antibacterial acrylate paint provided by the invention is high in hardness, good in wear resistance, excellent in antibacterial performance and long in service life.

The present invention relates to the preparation process of compound inorganic germicide, and belongs to the field of purifier material preparing technology. The present invention features that the surface of titania grain with photocatalytic activity has loaded porous structure coating layer of calcium hydroxy phosphate and to load germicidal silver ion in the porous structure. The preparation process includes mixing nano titania, ammonium dihydrogen phosphate and calcium nitrate to react inside a micro mixing reactor to obtain compound powder suspension; dropping the water solution of silver nitrate into the suspension for ion exchange to deposit silver ion on the surface of the compound grain; and heat treatment at 400-500 deg.c for 1 hr to obtain the compound inorganic germicide. The compound inorganic germicide has the synergistic effect of photocatalysis and metal ion germicide.

The invention relates to the field of air purification, in particular to a photocatalyst formaldehyde removal spray. The photocatalyst formaldehyde removal spray is prepared from, by weight, 1000 parts of distilled water, 50-100 parts of nano-silica, 50-100 parts of nano-silver, 50-100 parts of nano-titania, 5-20 parts of a penetrant, 20-50 parts of plant aromatherapy essential oil and 50-100 parts of tea extract. The photocatalyst formaldehyde removal spray can exist in walls or furniture for a long term and guarantees long-term effective removal of formaldehyde and other hazardous substances in air.

The present invention discloses a multi-layer film electrode structure and a method preparing the same, the multi-layer film electrode comprises a substrate and three layers titania film formed from three kinds titania slurry having different properties; respectively, in which the first layer film is formed from fine titania slurry obtained by subjecting titanium alkoxide to a sol-gel reaction in an alcohol solvent, the second layer film is formed from a porous nanometer titania slurry obtained by subjecting titanium alkoxide to acidic hydrolysis in an alcohol solvent, and the third layer film is formed from a hybrid titania mixture slurry obtained by mixing the porous nanometer titania slurry with commercial available titania and metal oxide powder. The multi-layer film electrode structure of the present invention can enhance the adhesion between the titania film and the substrate and increase a light-power conversion efficiency of sensitive solar cell when it applies in solar cell field.

A nano modified healthy bamboo charcoal, which taking powdery bamboo charcoal of 20-400 order as main material, produced with slight nano titania and nano titania antibacterial agent. Because of porous structure and high adsorbability of bamboo charcoal, in addition to disassembling adsorbed toxic and harmful substance to carbon dioxide and water that is nontoxic and harmfulless, which is bactericide and disinfection, so the invention can clean effectively indoor air, diminish effluvium, nullifying the harm to people, which is useful in indoor mattress, velvet toy, insole and in-car cushion and backing mattress.

The invention relates to a preparation method of a TiO2-loaded composite photocatalyst. The method comprises the following steps: subjecting a mixed solution of a soluble zinc salt, 2-methylimidazoleand a first organic solvent to a heated reaction in an autoclave, subjecting 2-methylimidazole to deprotonation, self-assembling ZIF-8 from 2-methylimidazole and zinc ions, carrying out filtering, washing and drying, and then, carrying out grinding, so as to obtain ZIF-8 powder; subjecting a hydrolyzable titanium source to a hydrolysis reaction with water in a second organic solvent, so as to obtain a nano-titania containing first solution; concentrating the first solution to improve the concentration of nano-titania sol, so as to obtain a second solution; adding the ZIF-8 powder into the second solution, carrying out thorough mixing through ultrasonic oscillation, and carrying out filtering, washing and drying, thereby obtaining the TiO2 / ZIF-8 composite photocatalyst.

A loading type of nanometer titania composite carrier is constituted by loading 5-20 nm TiO2 in 10-40 wt% onto gamma-Al2O3. Titania sol is first prepared through sol-gel process and then dropped into pseudo-then diaspore pulp of different solution; and the product is finally processed through drying, calcination successively at 200, 300, 400 and 500 deg.c for 2 hr each. The present invention loads nanometer Tio2 onto macroporous Al2O3 to form the composite nanometer carrier. This can utilize the superority of nanometer TiO2 while overcoming the demerits. By means of the micro design, surface acidity regulation of loaded TiO2 and loading active component, the hydrorefining activity of catalyst may be raised effectively.

The invention discloses a preparation method of a polyethylene antimicrobial packaging film. The preparation method is characterized by comprising the following steps of adding 0.3 to 1.0 part by weight of silver-loaded nano titania antimicrobial agent into 100 parts by weight of polyethylene resin; then adding 0.06 to 0.24 part of antioxidant 1076 and 0.04 to 0.16 part of auxiliary antioxidant 168; sufficiently mixing in a high-speed mixer, then granulating, drying and blowing film to prepare the polyethylene antimicrobial packaging film. Compared with the prior art, the preparation method disclosed by the invention has the beneficial effects that silver-ammonia ions are induced to form a strong interaction with the surface of titania by regulating a pH value; the silver-ammonia ions are reduced by using a water extract of a biomass loquat fruit, and further uniform compounding of silver and titania at the nanoscale is realized; no dispersing agent is needed, so that a preparation process is green and environmentally-friendly; the antibacterial rate of the prepared polyethylene antimicrobial packaging film to escherichia coli and staphylococcus aureus reaches 90 percent or above; the polyethylene antimicrobial packaging film is non-toxic, safe and sanitary.

The invention discloses a high-fire-retardant and wear-resistant modified silicone rubber cable material. The high-fire-retardant and wear-resistant modified silicone rubber cable material is prepared from the following raw materials in parts by weight: 30 to 60 parts of modified silicone rubber, 5 to 15 parts of urea formaldehyde resin, 3 to 9 parts of epoxy resin E-51, 2 to 8 parts of polyamide resin, 1 to 6 parts of dicumyl peroxide, 2 to 8 parts of maleic anhydride, 3 to 7 parts of acrylic acid, 1 to 4 parts of methacrylic acid, 2 to 5 parts of zinc oxide, 3 to 5 parts of sodium stearate, 4 to 8 parts of polyphosphate, 1 to 6 parts of low density polyethylene, 3 to 5 parts of liquid paraffin, 2 to 4 parts of styrene, 1 to 5 parts of mica iron oxide, 3 to 8 parts of zinc phosphate, 1 to 6 parts of nano titania, 2 to 5 parts of nano silica, 3 to 5 parts of silicon carbide, 3 to 6 parts of aluminum oxide, 2 to 8 parts of accelerator, 2 to 5 parts of tetraethyl orthosilicate, 3 to 6 parts of dibutyltin dilaurate, 1 to 4 parts of phase solvent and 2 to 6 parts of antioxidant. The cable material disclosed by the invention has excellent fire-retardant and wear-resisting properties.

The invention discloses a high-strength self-cleaning permeable surface layer mortar and a preparation method thereof. The mortar contains the following materials in parts by weight: 80-120 parts of cement, 350-400 parts of machine-made sand, 0.5-1.5 parts of a water reducing agent, 0.5-2 parts of aminated nano silica, 0.5-2 parts of nano titania, and 20-30 parts of water. According to the invention, for nano titania, aminated nano silica with relatively large particles is taken as a carrier, so that nano titania can be better dispersed in the mortar material, thus being more beneficial for the exertion of the photocatalysis property; aminated nano silica and nano titania achieve a synergistic effect with other material components, so that the prepared surface layer mortar is high in compressive strength, good in permeability performance and good in photocatalysis effect.

The invention belongs to the field of high polymer materials and particularly relates to a graphene oxide antibacterial composite PVC material and a preparation method thereof. An antibacterial composite is prepared in the way that nano-silver and nanometer titania are loaded on graphene oxide, and zinc oxide capable of improving the optical activity of titania is added, so that the antibacterial performance is greatly improved. The mechanical property and structural characteristics of graphene oxide are given into full play, so that nano-silver and nanometer titania can be closely combined with graphene oxide and a PVC material, and the function is effective for a long time. The mechanical property of the material is enhanced while the antibacterial effect is improved, the preparation technological conditions are mild, and the graphene oxide antibacterial composite PVC material is suitable for industrial production.

The invention discloses an environment-friendly aqueous interior wall coating for removing formaldehyde. The environment-friendly aqueous interior wall coating comprises components in parts by weight: 20-30 parts of a pure acrylic emulsion, 10-20 parts of iron whiting, 5-10 parts of talcum powder, 8-15 parts of activated carbon, 2-8 parts of bamboo charcoal powder, 1-5 parts of diatomite, 3-9 parts of nano-titania, 2-8 parts of a dispersion agent, 3-7 parts of a defoaming agent, 2-6 parts of a thickening agent and 25-35 parts of deionized water. The environment-friendly aqueous interior wall coating for removing formaldehyde contains activated carbon and bamboo charcoal powder, has good adsorptive performance and is capable of absorbing formaldehyde released in the coating, so that the formaldehyde pollution can be effectively alleviated, and indoor air can be improved; the environment-friendly aqueous interior wall coating is applicable to the fields of decoration and renovation of interior walls of hospitals, schools, shops and residences.

The invention provides a method for preparing a polyurethane nano-composite material. According to the method, through adding a modified carbon nanotube composite nano-material into thermoplastic polyurethane elastomer (TPU) by a solution melt blending method, the mechanical properties and heat resistance of the TPU are improved, and then, high-performance polyurethane nano-composite hoses are prepared. Through growing a nano-silica (SiO2) and nano-titania (TiO2) core-shell wrapping layer on the surface of each acidized carbon nanotube in situ, a core-shell type carbon nanotube composite nano-material is formed, and the carbon nanotubes (CNTs), SiO2 and TiO2 can be uniformly dispersed and compounded; through the coupling modification of a silane coupling agent and the effective compounding of TPU, the mechanical properties and heat resistance of the TPU are excellently improved, the dispersity of inorganic materials in the composite material is improved, and then, the high-performance polyurethane nano-composite hoses are prepared, so that the field of application of the TPU is extended by the polyurethane nano-composite material.