55results about How to "Response is smooth and safe" patented technology

The invention provides a high-alloy austenitic stainless steel microscopic structure, a sigma intermediate-phase color corrosive agent and a corrosion method. The high-alloy austenitic stainless steel microscopic structure, the sigma intermediate-phase color corrosive agent and the corrosion method have the advantages of being good in corrosion effect, good in display effect, free of pollution and stable in corrosion reaction. The corrosion method includes the steps of uniformly stirring raw materials by using a glass rod, allowing the raw materials to stand for 15-30 minutes, and preparing the corrosive agent, wherein the corrosive agent comprises the flowing components: 0.1-2g of potassium permanganate, 5-25ml of hydrochloric acid with the mass percentage concentration being 35%, 5-30ml of nitric acid with the mass percentage concentration being 68%, 0.1-1.2g of copper sulfate and 150-300ml of deionized water; and carrying out coarse grinding, fine grinding and polishing on a sample, washing the sample with absolute ethyl alcohol, then carrying out blow-drying, soaking the sample to be tested in the corrosive agent for corrosion for 15-300 seconds, placing the corrosion surface of the sample upwards until the metallographic-phase surface of the sample is corroded to be yellow, washing the obtained rough corrosion test sample under a water faucet, cleaning the obtained rough corrosion test sample with 95% alcohol after washing, and then carrying out blow-drying by using cold air to complete metallographic-phase corrosion of the stainless steel structure.

Rubber powder / acrylic acid / montmorillonite superabsorbent resin, raw material wt% composition is: acrylic acid 75-88%; rubber powder 7-20%; crosslinking agent 0.05-0.26%; montmorillonite 2.00-10%; initiator 0.25~0.8%. The preparation method is as follows: rubber powder is pretreated with concentrated acid; acrylic acid is neutralized; montmorillonite and pretreated rubber powder are added to acrylic acid neutralization solution; initiator and crosslinking agent are added under protective atmosphere, high-speed shearing, Fully react at a constant temperature of 60-80°C; dry at 110-130°C to obtain a superabsorbent resin. The ability of the invention to absorb deionized water is over 1000g·g-1. Its main raw materials are waste polyethylene film, rubber powder, cheap montmorillonite and acrylic acid, which can recycle industrial resources. It has good economic and environmental benefits.

The invention discloses a synthesis method and a use of monodispersed KMn8O16 nanospheres. The synthesis method of the monodispersed KMn8O16 nanospheres comprises the following steps of dissolving potassium permanganate, polyvinylpyrrolidone and carbonate in deionized water, adding soluble organic alcohol into the solution, carrying out mixing to obtain a uniform mixture, putting the mixture into a thermostatic bath, carrying out a thermostatic reaction process at a temperature of 50-120 DEG C for 1-24h to obtain brownish black precipitates, drying the brownish black precipitates, and calcining the dried brownish black precipitates in an argon atmosphere at a temperature of 300-600 DEG C for 2-20h to obtain the monodispersed KMn8O16 nanospheres. The monodispersed KMn8O16 nanospheres have structured morphology and uniform size adjustable in a range of 80-200nm. The monodispersed KMn8O16 nanospheres are prepared by a constant-temperature liquid phase reaction. The synthesis method is easy and simple and has a large yield. A performance test shows that the monodispersed KMn8O16 nanospheres have a large application prospect in the lithium ion battery energy storage field.

The invention belongs to the field of fluorine chemical synthesis and particularly relates to application of a gas-liquid contact reaction device to fluorination of perfluoropolyether acid. The gas-liquid contact reaction device comprises a gas inlet cylinder for containing fluorinating agent gas, a reaction tube filled with filler, a liquid cylinder, a product collecting cylinder and a tail gas treatment device, wherein a liquid outlet connected with the product collecting cylinder and a gas inlet connected with the gas inlet cylinder are formed in the bottom of the reaction tube, a spray head is arranged at the top end of the reaction tube and is connected with the liquid cylinder through a liquid pump, a gas outlet connected with the tail gas treatment device is formed in the top of the reaction tube, and heating strips are arranged on the outer wall of the reaction tube. The gas-liquid contact reaction device is capable of fluorinating the perfluoropolyether acid by fluorine gas effectively.

The invention relates to a metallographic etchant and an erosion method of austenitic stainless steel, which are especially suitable for metallographic erosion of 316 / 316L / 316H / 317 / 317L austenitic stainless steels. The metallographic etchant of the invention is composed of the following ingredients in percentage by volume: 30-35% of hydrochloric acid with mass percent concentration of 40%, 15-20%of nitric acid with mass percent concentration of 68%, 30-35% of propanetriol, and 15-20% of hydrogen peroxide solution with mass percent concentration of 30%. The metallographic etchant of the invention has the advantages of reasonable design, good erosion effect, good tissue display effect of eroded sample, non-pollution and slow and stable erosion reaction.

The invention provides a high molecular weight unsaturated polyether macromonomer which is characterized in that the polyether macromonomer is at a liquid state at normal temperature, and the structural formula (I) thereof is expressed in the specification, wherein R<1> is same or different, and represents a hydrogen atom or alkyl with 1-20 carbon atoms; R<2> represents alkyl with 1-20 carbon atoms; R<3> represents alkyl or carbonyl with 1-10 carbon atoms; R<5> represents a hydrogen atom or alkyl with 1-20 carbon atoms; R<4>O is different, and represents oxyalkenyl with 2-18 carbon atoms; n represents the average addition mole number of the oxyalkenyl, and 5<=n<=300; and X, Y and Z are same or different, and represent -N, -O or H. By optimally designing the molecular structure, the high molecular weight unsaturated polyether macromonomer provided by the invention ensures the liquid state thereof at normal temperature while the molecular polymerization reaction activity is ensured. Besides, a preparation method of the high molecular weight unsaturated polyether macromonomer provided by the invention is simple, and the conditions are easy to control; and the product does not need slicing post-treatment, the production cost is low, and the economic benefits are increased.