49results about How to "Act as a surfactant" patented technology

The invention relates to a gold cluster / graphene compound catalytic membrane preparation method which comprises the steps: (1) adding deionized water into oxidized graphene to be dispersed evenly andultrasonically dispersing to obtain dispersion liquid; utilizing a hydrothermal reduction method to reduce the oxidized graphene into reduced oxidized graphene rGO and freeze drying to obtain rGO powder; (2) adding the rGO powder into a gold cluster solution protected by thiol ligand, then adding ultrapure water and ultrasonically dispersing to obtain mixed liquid; utilizing vacuum filtration to load the mixed liquid on a base membrane and washing to obtain a gold cluster / graphene compound catalytic membrane. The preparation method disclosed by the invention has the advantages of convenient technological operation, large gold cluster load amount, high catalytic activity, easiness in being recycled and utilized, ability in achieving high-efficiency catalytic membrane construction and good application prospect.

The invention relates to an epitaxial growth method of a high-resistance GaN thin film. The method is performed in MOCVD equipment and includes a substrate baking stage, a nucleation stage and an epitaxial growth stage. The method is characterized in that a metal organic matter trimethylindium is used as a C impurity doping source during the epitaxial growth stage. With the method adopted, the high resistance of the GaN thin film can be achieved; the TMIn is unlikely to form In-N bonds in crystal lattices under high temperature, and therefore, high growth temperature can assist in avoiding theformation of InGaN alloys and ensuring the integrity of the lattice structure of the GaN thin film; the concentration of C impurities in a GaN epitaxial layer can be effectively controlled by changing the flow rate of the dopant TMIn, and therefore, doping efficiency is high, and repeatability is stable; and a doping source pipeline is not required to be added into an MOCVD system, other C dopingsources are not required to be installed, and therefore, the resources of existing device can be fully utilized. The method is of simplicity and easy to operate. The epitaxial material has good performance. The high-quality and low-cost growth of the high-resistance GaN thin film can be realized.

The invention belongs to the technical field of commodity processing, and in particular relates to graphene nano silver transparent soap and a preparation method and application thereof. The graphene nano silver transparent soap prepared by the method not only has the decontamination capability of general transparent soap, but also has the bactericidal function because of the addition of graphene nano silver. In addition, the graphene nano silver transparent soap has effect of moisturizing and beautifying due to excess reducing agents such as glycerin, tea polyphenols and red dates extract. According to the preparation method of one-step reduction of graphene oxide and silver ions, the added reducing agents can not only reduce the graphene oxide and the silver ions, and the excess reducing agents also can bring special effects. In addition, the preparation method has the advantages of low production cost, little danger, cheap and easily-obtained raw materials, greenness and no pollution, and is suitable for large-scale industrial production.

The invention relates to an aluminum foil and copper foil no-clean oily cutting fluid and a preparation method thereof. The invention belongs to the field of lubricating oil for metal processing, and is suitable for cutting aluminum foils, copper foils, tabs and the like in lithium ion batteries, capacitors and other devices. The invention discloses a special no-clean oily cutting fluid for aluminum foils and copper foils, which uses light mineral oil as base oil and comprises long-chain olefin, alkanol, polyfatty acid ester and an antirust agent. According to the invention, the selected base oil is light mineral oil composed of isoparaffin containing side chains and produced by petroleum refining, and has the advantages of small viscosity, easy volatilization and good lubricity. A gas chromatography-mass spectrometry test verifies that the cutting fluid can be completely volatilized within 30 minutes at room temperature after being coated on an aluminum foil, and no residue is left, so that a cleaning process after the aluminum foil is cut is omitted, and the processing cost is greatly saved.

The invention discloses a carbon quantum dot-loaded nano material lubricating additive and a preparation method thereof. The preparation method comprises the following steps: step 1, preparing antioxidant carbon quantum dots by utilizing one-step hydrothermal synthesis; 2, nickel hydroxide powder is prepared through a chemical precipitation method; and 3, ultrasonically stripping nickel hydroxide in an NMP (N-Methyl Pyrrolidone) solvent by using the carbon quantum dots as an auxiliary stripping agent to form the nickel hydroxide composite material loaded with the carbon quantum dots. According to the method, the carbon quantum dots are creatively used as a stripping aid, the layered nickel hydroxide material is ultrasonically stripped in the NMP solvent by controlling the temperature, and the stripping efficiency of the layered nickel hydroxide is improved, so that the dispersion performance of the layered nickel hydroxide in an oil product is greatly improved. A diphenylamine functional group grafted on the surface of the carbon quantum dot can be used as an antioxidant for slowing down oxidative cracking of an oil product, and meanwhile, the carbon quantum dot loaded nickel hydroxide composite material prepared after ultrasonic exfoliation can effectively improve the lubricating property of the oil product when being used as a lubricating oil additive due to the friction synergistic effect of carbon sphere particles and a layered material. The preparation method of the material is simple to operate, wide in raw material source, safe, pollution-free and easy for large-scale production.

The invention provides a method for preparing activated rubber powder by catalytic reaction and activating reaction, and relates to a method for comprehensive utilization of waste and scrap rubber. Compared with the production of regenerated rubber, the method reduces processes of desulfurizing, kneading and refining, thereby avoiding secondary pollution to the environment. The prepared activatedrubber powder has excellent compatibility with matrix rubber, and improves the physical and mechanical properties of the product. The formulation comprises the following compositions in weight portion: 100 portions of 30 to 40 meshes of waste rubber powder, 8 to 17 portions of plasticizer-dipentene, 5 to 8 portions of dusting agent-pottery clay, 0.2 to 0.5 portion of catalyst-cuprous chloride, 7 to 1.0 portion of promoting agent-polyalkylphenol disulfide, and 1 to 2.5 portions of dispersing agent-ethanol. The method comprises the following steps: placing the 30 to 40 meshes of waste rubber powder into a high-speed stirring reactor, and heating the waste rubber powder to the temperature of between 80 and 100 DEG C; adding the plasticizer, the dusting agent, the catalyst, the promoting agent and the dispersing agent into the reactor sequentially for reacting for 10 to 20 minutes at a temperature of between 80 and 120 DEG C, and cooling and discharging to produce the activated rubber powder. The prepared activated rubber powder can be used in rubber industry and building industry.

The invention provides modified nano ceramic particles, a preparation method thereof, ceramic diaphragm slurry, a preparation method thereof, a diaphragm and a lithium ion battery. The modified nano ceramic particles contain polar groups; the polar groups comprise acetyls. The preparation method of the modified nano-ceramic particles comprises the following steps of: mixing nano-ceramic particleswith amino groups, an acetylating agent and a catalyst according to a formula ratio, and performing a reaction to obtain the modified nano-ceramic particles. The ceramic diaphragm slurry provided by the invention is non-toxic and harmless to the environment; and the diaphragm prepared by using the ceramic diaphragm slurry provided by the invention can greatly improve the cycle performance and ratecapability of a battery.

The invention belongs to the technical field of coatings, and particularly relates to a modified polyurethane coating and a preparation method thereof. The modified polyurethane coating comprises thefollowing raw materials: a polyester resin component, an amino resin component, an isocyanate component, a thermal insulation agent component and an auxiliary agent component, wherein the thermal insulation agent component is composed of organic sepiolite, styrene, butyl acrylate, deionized water and oleic acid. According to the invention, styrene and butyl acrylate monomers generate styrene-butylacrylate under the action of an initiator, and styrene and butyl acrylate enter the space between organic sepiolite layers, so the thermal insulation agent component is obtained; oleic acid is unsaturated fatty acid and is environmentally friendly and harmless, and the addition of oleic acid is beneficial for polymerization between the styrene and butyl acrylate monomers, enables the styrene andbutyl acrylate monomers to react under lower preset conditions and functions as a surfactant for the styrene and butyl acrylate monomers, thereby realizing more thorough polymerization of the styreneand butyl acrylate monomers; and due to the addition of the thermal insulation agent component, the original performance of the polyurethane coating is improved, and the polyurethane coating has relatively strong thermal insulation performance.

The invention provides a microparticle enhanced special high temperature wear-resisting brazing bar. The brazing bar comprises a microparticle enhanced hollow copper brazing filler metal inner core, Co-coated Cr2O3 composite particles filled into the microparticle enhanced hollow copper brazing filler metal inner core, and a copper brazing flux coating adhering to the outer surface of the microparticle enhanced hollow copper brazing filler metal inner core. The microparticle enhanced hollow copper brazing filler metal inner core comprises a metal phase and micrometer SiC particles. The metal phase is composed of metal elements including, by mass percent, 1.1-1.4% of Ag, 0.6-0.9% of Mn, 0.4-0.5% of La, 1.3-2.93% of Sn, 1.6-1.8% of Nd and the balance Cu. The invention further provides a method for manufacturing the microparticle enhanced special high temperature wear-resisting brazing bar. The microparticle enhanced special high temperature wear-resisting brazing bar can improve wear-resisting performance and tensile strength of the brazing layer.

The invention discloses a polybutadiene rubber modified waterborne polyurethane adhesive and a preparation method thereof, which belong to the field of waterborne polyurethane adhesives and are used for solving the problems that an existing polybutadiene rubber modified waterborne polyurethane adhesive is high in thermal activation temperature, low in solid content and poor in primary viscosity and peeling strength. In order to solve the problems, the adhesive disclosed by the invention comprises the following components in parts by weight: 75-100 parts of polybutadiene rubber modified waterborne polyurethane, 3-5 parts of white carbon black, 0.2-0.5 part of 3-amino propyl triethoxysilane, 0.15-0.3 part of waterborne thickening agent, 8-15 parts of plasticizer and 3-7 parts of waterborne curing agent. The invention further provides a preparation method of the polybutadiene rubber modified waterborne polyurethane adhesive. After the adhesive disclosed by the invention is adhered with a sample and impacted for 5 cycles at a high-low temperature between -65 DEG C and 120 DEG C, the peeling strength is reduced by not more than 5%, the elongation at break is as high as 380%-510%, and the tensile strength is as high as 2.8 MPa-4.2MPa.

The invention relates to an environmentally friendly phosphorus-free pretreatment solution suitable for water-based paints and its preparation and application. The treatment solution is prepared from the following components and raw materials in mass percentage: modified water-based resin grafted with nano-cellulose 16-25%, compound complexing agent 0.8-1.8%, corrosion inhibitor 0.1-0.3%, sodium nitrate 0.4-0.6%, and the balance is deionized water. Compared with the prior art, the preparation of the pretreatment solution of the present invention is simple, and the substances used do not contain harmful substances such as phosphorus and chromium, and the environmental protection and economy are good, the film forming stability is good, and the bonding force with the water-based paint film is strong. And it has excellent corrosion protection performance, can effectively solve the technical problems such as poor film-forming property and poor bonding force with water-based paint film existing in the existing pretreatment liquid, and has a good application prospect.

The invention relates to the technical field of liquid crystal display and discloses a polymer-dispersed liquid crystal as well as a preparation method and application thereof. The polymer-dispersed liquid crystal comprises liquid crystal and polyacrylate and further comprises sodium polyacrylate. The preparation method of the polymer-dispersed liquid crystal comprises the following steps: preferentially taking distilled water, sodium polyacrylate and a mixed solution at the weight ratio of 40:10:50, wherein the weight ratio of the liquid crystal and the acrylate in the mixed solution is 60:40; mixing the distilled water, the sodium polyacrylate and the mixed solution; and irradiating the mixture with ultraviolet light to solidify to form the polymer-dispersed liquid crystal. The invention also relates to the application of the polymer-dispersed liquid crystal to a liquid crystal display. The preparation method of the polymer-dispersed liquid crystal is easy to operate, the adopted raw materials are easily available, the preparation process is simple, and the prepared polymer-dispersed liquid crystal has high contrast.

The invention discloses a preparation method and an application of medicinal composite plant fatty acid calcium, and belongs to the technical field of biological medicine preparation. The medicinal composite plant fatty acid calcium comprises the following raw materials: linseed oil, mulberry oil, coconut oil, citric acid, water-soluble starch and micron-sized hydroxyl calcium phosphate, and is formed through steps of saponification, filtration, concentration, acidification and calcification. By adopting the method disclosed by the invention, the content and the yield of the polyunsaturated fatty acid are obviously improved. The composite plant fatty acid calcium prepared by the invention can be applied to pharmaceutical adjuvants or auxiliary materials or pharmaceutical products for supplementing calcium for old people.

The invention provides a new production process of titanium white powder and low-sulfur titanium white powderfor a denitrification catalyst. The production process comprises the following steps: after obtaining competently washed metatitanic acid, neutralizing with ammonia water, heating materials to 70-75 DEG C, and curing for 1 hour while keeping the temperature; dry-pressing slurry through a filter press, removing filter cakes, crushing the filter cakes, and drying and calcining in a rotary kiln; and then, discharging, cooling, conveying to a storage bin, and pulverizing through a micron pulverizer to obtain the pure titanium powder finished product for a nano catalyst. Preferably, after completing the step of curing while keeping the temperature, the low-sulfur catalytic titanium white powder can be obtained by adding a step of washing with deionized water and keeping the subsequent process flow unchanged, and the sulfur content is less than 0.4%.