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175results about How to "High absorption rate" patented technology

Additive for smelting aluminium alloy and preparation method and application method thereof

The invention relates to an additive for smelting aluminium alloy and a preparation method and an application method thereof, relating to the technical field of nonferrous alloy manufacturing with a special additive. The additive is composed of metal powder, cosolvent, heat-generating agent, detonating agent and moisture proof agent. The preparation method comprises the following steps: raw materials comprising the following by mass percentage, 70-81.5% of metal powder, 15-20% of cosolvent, 2-5% of heat-generating agent, 1-3% of detonating agent and 0.5-2% of moisture proof agent, are fully mixed evenly into compound powder with a ball mill, and the mixture is put into a mould, and is performed with cold pressing by a hydraulic pressure machine so as to obtain the additive for smelting aluminium alloy. The application method of the invention comprises the following steps: a graphite crucible filled with a pure aluminium pig is arranged in a resistance furnace to be heated until the aluminium pig is melted into aluminium liquid, and then the additive is added to react with the aluminium liquid so as to obtain aluminium alloy. Under the condition that the quality of aluminium alloy is not lowered, the additive solves the problems of high dissolving temperature, low absorptivity and unstable absorptivity of the additive.
Owner:HEBEI UNIV OF TECH

Solar spectrum selective absorbing coating and preparation method thereof

The invention provides a solar spectrum selective absorbing coating and a preparation method thereof, wherein the preparation method comprises the following steps of: (1): selecting copper or stainless steel as substrate material; (2): selecting high-temperature oxidation resisting TiAlN as a diffusion impervious layer, using pure metal Cu or Al as a high infrared reflective layer, wherein an absorbing layer consists of two conductive particle-ceramic (AlN) composite layers with different volume percentages of metal nitride conductive particle (TiAlN), using AlN as an antireflection layer, and using SiO2 as a protective layer; (3): controlling components and contents of different film materials by controlling the gas flow and the sputtering power and the like; (4): before placing the substrate material into a vacuum chamber, carrying ultrasound treatment on the substrate material for 10-30 min, drying, after placing the substrate material into the vacuum chamber, roasting for 10-30 min at 100-120 DEG C, before sputtering, bombarding the surface by argon ions; and (5): obtaining a coating with a multi-layer structure, which has high absorption rate Alpha (0.95 +/- 0.02) in the solar spectral region (0.3-2.5 micrometers), and which has quite low emissivity Epsilon (0.04 +/- 0.01) in an infrared region (2.5-50 micrometers).
Owner:GRIMAT ENG INST CO LTD

Method for preparing magnetic cellulose aerogel from wastepaper

The invention provides a method for preparing magnetic cellulose aerogel from wastepaper, and relates to an aerogel preparation method. The invention aims at providing a method for preparing regenerated magnetic cellulose aerogel from the wastepaper. According to the method, the wastepaper material in life is used as a raw material for preparing a green, ultralight and highly porous aerogel oil absorbing material. The method comprises the following steps: step one. preparing regenerated cellulose from wastepaper; step two. preparing regenerated cellulose aerogel; step three. carrying out hydrophobic modification on the regenerated cellulose aerogel; and step four. preparing the regenerated magnetic cellulose aerogel oil absorbing material. The method has the advantages that the magnetic cellulose aerogel oil absorbing material is prepared from the wastepaper in life, the material can be greatly saved, the waste is turned into wealth, the regenerated magnetic cellulose aerogel is simple in a preparation technology, low in cost, convenient to use, capable of effectively absorbing multiple organic solvents and oil matters leaked in water, and high in absorption rate, the oil absorption is thorough, the oil absorbing material is nontoxic and harmless and causes very little secondary pollution, and an adopted magnetic collection method is simple, convenient and easy to use.
Owner:HARBIN INST OF TECH

Preparation method and application of multiflower knotweed vine polysaccharide chelate zinc

The invention relates to a preparation method and application of multiflower knotweed vine polysaccharide chelate zinc. The problems of preparation of the multiflower knotweed vine polysaccharide chelate zinc and application thereof in preparation of health-care products and medicaments can be effectively solved. The method comprises the following steps of: extracting multiflower knotweed vine powder in water in a weight ratio of 1: (8-10) at the temperature of 80 and 100 DEG C for 2 to 4 times and for 1.5 to 3 hours every time, filtering, combining the filtrate, performing concentration tillthe relative density is 1.1 to 1.3, and obtaining multiflower knotweed vine polysaccharide concentrate; mixing the multiflower knotweed vine polysaccharide concentrate and zinc sulfate solution in equal volume, stirring the solution uniformly, regulating the pH value to be between 6.0 and 8.5 by using sodium hydroxide solution, reacting for 2 to 3 hours at the temperature of between 70 and 90 DEGC, and obtaining multiflower knotweed vine polysaccharide chelate zinc solution; and dialyzing the multiflower knotweed vine polysaccharide chelate zinc solution, adding 95 percent ethanol into the dialyzed solution till the ethanol content reaches 80 to 90 percent, performing standing and alcohol precipitation for 10 to 24 hours, filtering, obtaining sediment, drying and crushing, and thus obtaining the multiflower knotweed vine polysaccharide chelate zinc. The method is simple, the raw materials are rich, the product has wide application, the problem of low absorption of the conventional zinc supplementing product is solved, and the product has the effect of improving the immunity of the body and is an innovation of Chinese medicaments.
Owner:HENAN UNIV OF CHINESE MEDICINE

Super absorbent resin with high antibacterial property and high salt tolerance as well as preparation method and application thereof

The invention relates to super absorbent resin with high antibacterial property and high salt tolerance. The super absorbent resin is prepared from the following raw materials in parts by weight: 100parts of acrylic acid, 35-45 parts of a basic compound, 0.06-1.8 parts of a primary crosslinking agent, 0.05-2 parts of an initiator, 0.3-4 parts of a compound crosslinking agent and 0.01-10 parts ofa tea saponin intercalation graphene antibacterial composition. A preparation method of the super absorbent resin comprises the following steps: in a mixed solution of acrylic/acrylate formed by diluting with deionized water and neutralizing an acrylic monomer solution with basic compound, adding the primary crosslinking agent, uniformly stirring, then adding 0-45% of tea saponin intercalation graphene antibacterial composition, carrying out ultrasonic dispersion for 30-240 minutes, then heating to the temperature of 35-70 DEG C, adding the initiator, carrying out polymerization to form colloidal super absorbent resin, sequentially carrying out pelletizing and drying, and carrying out surface treatment at the temperature of 110-180 DEG C by adopting a mixed crosslinking agent, so that thesuper absorbent resin is obtained.
Owner:浙江卫星新材料科技有限公司
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