45results about How to "The steps are simple and controllable" patented technology

The invention discloses a method for preparing nanometer silver halide colloids. The method comprises the following steps: placing solid paraffin into de-ionized water with temperature of 70-100 DEG C for stirring to obtain paraffin / water microemulsion; adding metal halide salts with the molar concentration of 0.01-0.1 mol / L and AgNO3 aqueous solution to the paraffin / water microemulsion by using a double-dipping method, keeping the temperature and stirring to obtain uniformly dispersed mixed microemulsion; standing and naturally cooling to the room temperature, taking out a paraffin mass condensed on a water surface after oil-water separation occurs in the mixed microemulsion , adding a small amount of dispersing agent to the remaining microemulsion, and continuously stirring to obtain a silver halide colloid with stable dispersion. In the invention, the whole reaction process by using the solidification and melting of paraffin, is simple and easy to control, green and environmental friendly, and the paraffin can be recycled, thereby the invention is particularly suitable for industrial production. The microcosmic shape and appearance of nano particle in the prepared product has the characteristics of uniform size, excellent dispersing stability and non-decomposition when exposing to light.

The invention discloses a metal fiber brush and a preparation method thereof. The brush comprises conductive metal fibers and filling metal fibers. The length of the filling metal fibers is shorter than the length of the conductive metal fibers, one end of each filling metal fiber is flush with one end of each conductive metal fiber, the conductive metal fibers and the filling metal fibers are uniformly arranged along a length direction, and after compacting molding, the filling metal fibers and the conductive metal fibers are integrally wrapped by a metal wrapping sleeve. The preparation method comprises: winding the conductive metal fibers and the filling metal fibers together on a wire reel to form a metal fiber ring; and cutting the metal fiber ring, after the compacting molding, immersing one end of the metal fiber ring in an acid solution or aqueous alkali, and dissolving the filling metal fibers to obtain the metal fiber brush. The metal fiber brush is compact and reasonable in structure, high in fiber bonding strength, simple in preparation process, large in current carrying capability, small in contact resistance, long in service life, fast in sliding speed, small in heat productivity and small in debris amount, is suitable for industrial production, can replace a conventional carbon brush or a conventional metal fiber brush, and can satisfy the application demand for a large-power high-precision conductive slip ring.

The invention discloses a visible light degradation agent for dyeing wastewater treatment and a preparation method of the visible light degradation agent and belongs to the field of preparation of inorganic nano-composite materials. Hydrolyzable titanium salt is adopted as a main raw material, soluble tin salt and silver salt are adopted as doping agents of tin and silver elements, and eventually Sn and An co-doped TiO2 is obtained through the processes of hydrolysis, grinding, calcination and the like; and the TiO2 has an excellent degradation property for methylene blue under visible light. The nano powder prepared by the invention has the characteristics of small granularity, regular appearance, uniformity in distribution, good dispersivity and the like; and the technology has an industrial popularization value due to high synthesis speed, low cost, high productivity and zero contamination.

The invention relates to a preparation method of thermosensitive liposome with a whitening effect. The preparation method is characterized by comprising the following steps: A, weighing a whitening composition, liposome, a membrane stabilizer, ethyl alcohol, glycerol and deionized water; B, adding the liposome and the membrane stabilizer into the ethyl alcohol, stirring under the condition that the temperature is 20 to 25 DEG C and the rotating speed is 300 to 800 rpm till a mixture is completely dissolved; adding the glycerol and continuously stirring till the liquid becomes clear and transparent to obtain a lipid membrane mixed solution; C, adding the whitening composition into the lipid membrane mixed solution and stirring under the condition that the temperature is 20 to 25 DEG C and the rotating speed is 300 to 800 rpm till the liquid becomes clear and transparent to obtain a whitening agent and lipid membrane pre-mixed solution; D, adding the whitening agent and lipid membrane pre-mixed solution into the deionized water, stirring for 10 minutes under the condition that the temperature is 20 to 25 DEG C and the rotating speed is 300 to 800 rpm, putting into a refrigerator andreducing the temperature to 2 to 5 DEG C; then at the pressure of 1500 bar, homogenizing for 1 to 3 times by using a high pressure homogenizer, thus obtaining the thermosensitive liposome with the whitening effect. The thermosensitive liposome with the whitening effect, disclosed by the invention, has the beneficial effects of simultaneous loading of three whitening active substances, good whitening effect and thermosensitive characteristic after transdermal absorption.

The invention provides a flame-retardant scraping-resistant photodiffusion PP material and a preparation method thereof. The flame-retardant scraping-resistant photodiffusion PP material comprises the following components in parts by weight: 75-95 parts of PP, 2-10 parts of a brominated flame retardant, 0.5-5 parts of nano antimonous oxide, 0.2-5 parts of an organosilicon polymer, 0.2-1 part of flame-retardant oil, 0.1-0.5 part of an antioxidant, 0.1-0.5 part of a photostabilizer, 0.1-0.5 part of a transparent nucleating agent, 0.1-0.5 part of a lubricant, and 0.1-0.5 part of an acid absorbent. By selecting specific type of functional additives and under synergistic mechanism of all raw materials, the PP material finally has the advantages of high transparency and haze, flame retardance, scraping resistance, low cost, excellent toughness, light density, excellent yellowing resistance, high thermal deformation temperature, no toxicity and the like and is recyclable, and the usage performance of the PP material can be greatly promoted.

The invention discloses a preparation method of a carbon aerogel material with ultra-high specific surface area. The method comprises four steps: wet ball milling of biomass fibers, TEMPO oxidation of the ball-milled biomass fibers, preparation of oxidized biomass fiber aerogels, Pyrolytic carbonization. The cellulose carbon aerogel prepared by the invention has a unique three-dimensional sheet-like stacking structure, which provides great potential for its application as a material such as a catalyst, an adsorbent and an electrode capacitor.