42results about How to "Not easy to oxidize and change color" patented technology

The invention relates to a silver-loaded antibacterial dressing and a preparation method thereof. The preparation method comprises the steps of dissolving silver salt components such as silver nitrate and silver acetate and stabilizing agent components such as poly-amido compounds, poly-hydroxyl compounds and poly-carboxyl compounds into deionized water, and then mixing the constituents uniformly, so that a silver salt antibacterial solution is obtained; dipping or soaking an antibacterial dressing substrate into the silver salt antibacterial solution, and conducting drying, so that silver loading of the antibacterial dressing substrate is achieved. The silver loading method of the silver ion antibacterial dressing is simple, easy to implement and suitable for large-scale production; the obtained silver-loaded antibacterial dressing has the excellent antibacterial property, silver ions can be released stably, oxidizing discoloration does not occur easily, falling of silver at a wound and pigment deposition are not caused easily, and the silver-loaded antibacterial dressing and the preparation method thereof can be widely applied to silver loading processing of various silver ion antibacterial dressings.

The invention relates to the technical field of regenerated fibers, especially to a functional protein regenerated fiber and a manufacturing method thereof. The functional protein regenerated fiber comprises, by weight, 1 to 99 parts of protein, 1 to 99 parts of polyvinyl alcohol and 0.035 to 9 parts of amino acid and / or amino acid hydrochloride. Compared with the prior art, the invention has the following advantages: amino acid and / or amino acid hydrochloride is added to improve secondary and tertiary structures of protein molecules, so the degree of polymerization of the regenerated fiber is increased, and the prepared fiber is firmer.

The invention discloses a preparation method of a ledipasvir intermediate shown as formula (III). The method is characterized by taking (1R, 3S,4S)-N-t-butyloxycarbonyl-2-azabicyalo[2.2.1] heptane-3-carboxylic acid and o-phenylenediamine as raw materials and synthesizing (1R, 3S,4S)-3-(6-bromine-1H-benzimidazole-2-yl)-2-azabicyalo[2.2.1] heptane-2-carboxylic acid tert-butyl ester by using an anhydride mixing method. The whole route is low in production cost and high in yield; the formed monoamide is easy to purify; the generation and the residual of impurities are reduced; the o-phenylenediamine used as the raw material is cheap and easily-available, is hard to oxidize and discolor and can be stored in bulks; the industrial production is facilitated. The formula (III) is described in the description.

The invention provides a metal-imitated coating for building external walls and a preparation method of the metal-imitated coating. The metal-imitated coating is a double-component coating for constructional engineering. The metal-imitated coating is prepared from primer A, a primer auxiliary agent B, finish paint A and a finish paint auxiliary agent B. During construction, the primer auxiliary agent B is added to the primer A, and the primer is applied to flat walls provided with diving joints, subjected to putty grinding and capable of being constructed directly in a coated manner; the finish paint auxiliary agent B is added to the finish paint A, the dried primer is coated with the finish paint, and finally, the building external walls achieve the decorative effect of an imitation aluminium plastic sheet curtain wall. According to the invention, solid content of a product under the construction condition is increased, an ester mixture is selected as a diluent, toxicity of a solventin a using process is reduced, pollution to the environment is reduced, dissolving capacity for resin and the coating is improved, applicable viscosity, diluent consumption and VOC content are reducedbetter, good paint film property of a product is kept while environmental protection property of product use is improved, and a coating film has the characteristics of good flashing property, low probability of oxidizing discoloration and long service life.

The invention relates to a ceramide preparation pure dry powder which is white without peculiar smell and is made from galactosyl ceramide, phosphatide and cholesterol which are mixed uniformly. The weights of the galactosyl ceramide, the phosphatide and the cholesterol respectively take 60 percent to 70 percent, 20 percent to 25 percent and 10 percent to 15 percent in the total weight of the dry powder. A dry pasty ceramide preparation developed by East China Normal University and ethanol are used as raw material and extracting solution respectively. The ethanol is used for extracting ceramide from the dry pasty ceramide preparation twice, the extract is frozen and dried, and the dry powder is prepared. The dry powder is used as the raw material; a small quantity of 95 percent medical ethanol is added to be heated and dissolved and injected into hot stirred distilled water by an injector; and ceramide lipidosome emulsion is prepared. The dry powder is added into cosmetic; the addition is 0.01 percent to 0.1 percent of the weight of the cosmetic; the dry powder and the cosmetic are stirred uniformly; and the cosmetic with moisturizing function is prepared.

The invention relates to a wire field and particularly relates to an enamelled wire. The enamelled wire comprises a metal core, wherein the outer surface of the metal core is sequentially coated with an inorganic micro particle layer, a wear-resistant insulation layer and insulation paint layer, the wear-resistant insulation layer is a nylon surface layer dipped in epoxy resin, and insulation paint is mixture of polyurethane insulation varnish and high temperature color concentrate. The enamelled wire has advantages of ultraviolet irradiation resistance, high temperature resistance for melting prevention and strong acid and alkali resistance capability.

The invention discloses a surface-modified potassium titanate whisker-reinforced copper-based graphite motor carbon brush. According to the carbon brush material, natural flake graphite and flaky silver-plated copper powder are taken as base materials, and a polydopamine film is deposited on the surface of the natural flake graphite, so that the surface property is improved, the bondability and the dispersity of the polydopamine film and the other raw materials are improved and the sintered density of a green body is improved. The added potassium titanate whisker subjected to carbon nano-microsphere-polydopamine film coating treatment has good conductivity and enhancement effect; a traditional resin adhesive is replaced with silica sol, so that internal nodules of a system are effectively prevented from falling off in the sintering process; the finally prepared carbon brush material has more excellent mechanical property and anti-wear property than a traditional copper-based graphite carbon brush, and is durable in use, not easy to oxide and discolor and outstanding in performance.

The invention discloses a processing method for dendrobium nobile lindl flowers. The method includes picking dendrobium nobile lindl flowers, putting cleaned dendrobium nobile lindl flowers into a soaking solution to soak and perform color protection treatment, and taking the flowers out to drain, wherein the soaking solution includes nisin, vitamin C, cellulase, glucose oxidase and phytic acid; filling the dendrobium flowers after color protection treatment into Xinhui dried tangerine peel mandarin peels, covering fruit covers, and placing the dried tangerine peel mandarin oranges in a charging tray; and putting the charging tray into a freeze dryer, starting a vacuum pump to perform vacuum-pumping for 1-1.5 h, performing heating to 35-40 DEG C to dry for 2 h, adjusting temperature to 45-50 DEG C to dry for 8 h, performing packaging after cooling, and obtaining dried dendrobium nobile lindl flowers after storing at cool and dry places. Through the method, the effective nutrient compositions, appearance and colors of dendrobium flowers can be maximumly reserved, and the dendrobium flowers can be preserved for a long time and is not easy to oxidized and discolored; and as the dendrobium flowers fuses the fruit fragrance of the Xinhui dried tangerine peel mandarin oranges, the tea can be mellow and thick in taste, fragrant and pleasant and can be deeply loved by consumers.

The invention discloses a preparation method of deep-fried crispy lotus root strips. The preparation method comprises the following steps: cleaning fresh lotus roots and removing the peel of the fresh lotus roots, carrying out blanching, color protection and softening treatment to lotus root segments, cooling, cutting into lotus root strips, draining water on the surfaces of the lotus root strips, adhering a water-retention powder layer by use of a gelatinized starch slime layer on the surfaces of the lotus root strips, forming a water-resisting layer on the surfaces of the lotus root strips, hanging crispy paste on the lotus root strips adhered with the water-retention powder layer, coating breadcrumbs, frying, deoiling, air cooling and packaging. The method is used for solving the technical problems of moisture seepage and oil infiltration in a storage process of the deep-fried crispy lotus root strips and can ensure that the deep-fried crispy lotus root strips keep the original crispy character; and the prepared deep-fried crispy lotus root strips can keep the crispy character for more than 2 days at normal temperature, are appropriate in hardness, are difficultly oxidized and discolored, are delicious in taste, are crispy in mouthfeel, and are the healthy, convenient and delicious fried food.

The invention relates to the technical field of alloys, and particularly relates to a gold alloy. The gold alloy comprises 5-10% of Ag, 3-7% of Zn, 2-5% of Cu, 2-4% of Nb, 0.5-1.5% of Ca, 0.5-1.5% of Zr, 2-4.5% of Er, 0.5-1% of Ho, 1-3% of epoxy resin and the balance of gold and inevitable impurities. The invention also provides a synthetic method of the gold alloy. The gold alloy provided by the invention has the advantages of excellent high-temperature property, very long service life, high-temperature resistance, oxidization resistance and creep resistance; gold jewelry made from the gold alloy has the advantages of low price, high hardness and long-lasting color and luster and can be worn for a long time.