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66results about How to "The process is simple and controllable" patented technology

Preparation method of echinoid titanium dioxide microspheres in single/double layer cavity structure

The invention relates to a preparation method of echinoid titanium dioxide microspheres in single/double layer cavity structure, belonging to the field of nano composite materials. The method comprises the following steps: (1) preparing monodisperse silicon dioxide microspheres with uniform particle size; (2) by using silicon dioxide as a template, coating a titanium dioxide layer on the surface of the silicon dioxide microspheres by using a sol-gel method to obtain core-shell type silicon dioxide/titanium dioxide composite microspheres; (3) regulating the concentration of sodium hydroxide solution, the hydrothermal reaction time and other conditions, and preparing echinoid titanium-base microspheres in the single/double layer cavity structure in a controllable way; and (4) treating the echinoid titanium-base microspheres in the single/double layer cavity structure with hydrochloric acid with a certain concentration, and calcining at high temperature to obtain anatase-type echinoid titanium dioxide microspheres in the single/double layer cavity structure. The material prepared by the method has the high-activity pure-phase titanium dioxide crystal structure, and has the advantages of large specific area, complete appearance and high yield; the technical process is controllable and easy to operate; and the invention also has the advantages of low preparation cost, no pollution and low energy consumption.
Owner:UNIV OF SCI & TECH BEIJING

Lightweight inorganic insulation board containing silica aerogel and preparation method thereof

The invention discloses a lightweight inorganic insulation board containing silica aerogel and a preparation method thereof. The preparation method comprises the following steps: a. preparing surfactant liquid: fully stirring a surfactant and water to prepare a uniform surfactant liquid for standby use; b. preparing powder: fully mixing cement, ash calcium, aerogel, light aggregate fillers, fibers and latex powder and stirring uniformly to prepare powder for standby use; c. preparing the inorganic insulation board: adding the uniformly mixed powder to the surfactant liquid within 5-10 minutes through stirring, then filling the slurry into a die for forming and curing at normal temperature, thus obtaining the final product. Compared with the traditional inorganic insulation boards and insulation boards containing non-silica aerogel, the prepared inorganic insulation board containing silica aerogel has the characteristics of short production cycle, simple and controllable process and low price, has good heat insulation property and effectively solves the problems of high heat conductivity coefficients and higher water absorption of conventional inorganic insulation boards, and the heat conductivity coefficient of the inorganic insulation board can be reduced by 10-30%.
Owner:BEIJING BUILDING MATERIALS ACADEMY OF SCI RES

Polymer multilayer optical film with linear trapezoidal thickness structure and manufacturing method thereof

The invention discloses a polymer multiplayer optical film with a linear trapezoidal thickness structure and a manufacturing method thereof. The polymer multilayer optical film comprises n first optical film layers and m second optical film layers, wherein the first optical film layers are made of a polymer A; the second optical film layers are made of a polymer B; the polymer A and the polymer B have different refractive indexes; the n first optical film layers and the m second optical film layers are laminated alternately layer by layer; the thicknesses of the n first optical film layers increase layer by layer in a linear gradient way along an overlapping direction; the thicknesses of the m second optical film layers increase layer by layer in a linear gradient way along an overlapping direction; the polymer multilayer optical film is obtained by adopting a bidirectional extension technology. By adopting the polymer multilayer optical film with the linear trapezoidal thickness structure, bandwidth reflection can be performed selectively; for example, infrared light of a certain bandwidth is reflected, ultraviolet light is reflected fully, and visible light is reflected fully. The polymer multilayer optical film is simple in manufacturing process, is low in cost, and can be widely applied in the fields of agricultural plastic tents, automobile window films, building window films and liquid crystal display brightening films.
Owner:安徽昂科丰光电科技有限公司

Method and application of preparing high-level oxidation catalyst through cobalt ore smelting slag

The invention discloses a method of preparing a high-level oxidation catalyst based on sulfate radial by utilizing solid waste cobalt ore smelting slag as a raw material, and pickling, modifying and activating the raw material. In the catalysts, the silicon dioxide skeleton in the slag is used as a carrier, and such ions or compounds as cobalt and ferrum are fixedly carried on the granule surfaces through pickling and coprecipitation methods, so that the smelting slag has such characteristics as high-level oxidation, multi-metal concerted catalysis and heterogeneous catalysis, and the like, and a non-homogeneous phase catalyst system formed by the smelting slag enables the smelting slag to be easily separated from a water body. When being applied on industrial sewage treatment, the catalytic oxidation system not only has high catalytic oxidation efficiency, wide pH adaptation range, low metal ion loss quantity and easy separation with water body, but also recycles the cobalt ore slag solid waste to change the waste into valuable, thereby both meeting the sustainable development and the nation call of the energy conservation and emission reduction, and having low cost and is easy to generalize, so that the method in the invention has brilliant application prospect.
Owner:ZHEJIANG UNIV

Waterproof voile production technology, and special production equipment thereof

The invention belongs to the technical field of waterproof materials, and especially relates to a waterproof voile production technology. The waterproof voile production technology comprises followingsteps: raw material preparation, waterproof solution preparation, and glue solution preparation, wherein the raw material is glass fiber, the waterproof solution comprises 35 parts of water, 5 partsof acrylic acid, 2 to 2.5 parts of 30% sodium hydroxide aqueous solution, 0.1 to 0.15 part of a cross-linking agent, 0.1 to 0.2 part of an initiator, and an auxiliary agent, and the glue solution comprises 150 parts of water, and 10 parts of a polyacrylate emulsion with a solid content of 50%; primary dip padding; drying; secondary dip padding; secondary drying; drafting; and coiling. After drying, a double layer waterproof structure is formed by the waterproof solution and the glue solution, the waterproof voile water absorbing swelling speed and the sealing waterproof performance are improved; a plurality of times of drying treatment and temperature control is capable of realizing reaction of components in the waterproof solution and the glue solution, the physical/chemical performance of the waterproof voile is improved. The whole process is easy to control, no special equipment is needed, and the production cost is relatively low.
Owner:WUXI TENGHUA CABLE MATERIAL TECH CO LTD

Preparation method of ZnO modified WO3/BiVO4 heterojunction as well as application of ZnO modified WO3/BiVO4 heterojunction to photoelectrocatalysis

The invention relates to a preparation method of a ZnO modified WO3/BiVO4 heterojunction and belongs to the technical field of material preparation. The preparation method of the ZnO modified WO3/BiVO4 heterojunction comprises the following steps: preparing a WO3 seed crystal layer from WCl6 and PVP; dissolving sodium tungstate into water and adding hydrochloric acid and ammonium oxalate sequentially to obtain a transparent solution; adding the transparent solution into the WO3 seed crystal layer, performing reaction to obtain a WO3 array precursor and performing high-temperature annealing toobtain a WO3 electrode; dissolving bi(acetylacetone)vanadium oxide and bismuth nitrate pentahydrate into glacial acetic acid, and adding ethyl cellulose to obtain a BiVO4 precursor solution; dispensing the surface of the WO3 electrode with the BiVO4 precursor solution, drying and annealing to obtain a WO3/BiVO4 composite photo-anode; and placing the WO3/BiVO4 composite photo-anode in an atomic layer deposition system, performing sedimentary cycle on diethyl zinc and water and allowing ZnO to grow layer by layer to obtain the ZnO modified WO3/BiVO4 heterojunction with relatively high efficiencyand stability in photoelectrocatalysis.
Owner:NINGBO UNIVERSITY OF TECHNOLOGY

Ceramic with mullite structure as well as preparation method and application thereof

The invention relates to ceramic with a mullite structure as well as a preparation method and application thereof. The ceramic has a crystalline-state A14B209 phase and amorphous silicon dioxide, wherein amorphous silicon dioxide accounts for 18% or more of total mass of the ceramic; density of the ceramic is smaller than 2.8g/cm<3>; after ceramic is prepared into filaments, monofilament tensile strength is 1.2-1.8 GPa, and elastic modulus is 140-180 GPa. The preparation process is a classical single-phase mullite sol-gel method, and is used for preparing a product with low density, high toughness and high strength by optimizing types and dosage of components. The preparation method disclosed by the invention has the advantages of being wide in raw material source, low in cost, simple andcontrollable in preparation process, short in time consumption, relatively low in requirement on production environment and equipment, good in product repeatability, liable to recycle a solvent, suitable for industrial production and the like. A product designed and prepared by the preparation method can be applied to the fields such as thermal insulation, national defense and military industry, aerospace, and environmental protection of chemical industry.
Owner:CENT SOUTH UNIV

Heteroatom doped carbon aerogel and preparation method thereof

The invention discloses heteroatom doped carbon aerogel and a preparation method thereof. The method comprises the following steps: directly and evenly grinding zinc salt containing crystal water and an organic ligand containing heteroatom in a mortar, and then performing carbonization treatment on a mixed material to obtain the heteroatom doped carbon aerogel. The method disclosed by the invention achieves ultrathin-wall heteroatom doped carbon aerogel synthesis through a one-step method, and has the advantages of simple and controllable technology, short preparation period, low cost and high heteroatom doping efficiency. The heteroatom doped carbon aerogel disclosed by the invention has a three-dimensional porous structure and an ultrathin-wall structure, a specific surface area of the heteroatom doped carbon aerogel is 1028.7 to 1921.4m<2>g<-1>m<2>g<-1>, an average pore size is 0.9 to 1nm, and a wall thickness is 3 to 5nm; the heteroatom doped carbon aerogel has the advantages of ultrathin wall, large specific surface area, high porosity, multiple active sites, high atom utilization rate, large contact area with electrolyte and the like; the heteroatom doped carbon aerogel can enable a material to have good electric conductivity and high chemical reaction reactivity.
Owner:HUNAN UNIV +1
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