48results about How to "Meet friendly request" patented technology

The invention discloses a conformal coating for protecting a printed circuit board, a preparation method and a curing method thereof, belonging to the field of printed circuit board protection materials. The conformal coating comprises the following components in percentage by weight: 31-63 percent of polyurethane-acrylic ester resin, 30-60 percent of active diluent, 4-8 percent of photoinitiator and o.55-1.55 percent of auxiliary agent. The conformal coating contains no solvent, cannot cause pollution due to solvent volatilization and is environmentally-friendly. Moreover, after the conformal coating is irradiated and quickly cured through ultraviolet light, the conformal coating can be continuously subjected to moisture curing, thus the optimal property of the conformal coating can be ensured even if the conformal coating is in a place with a shadow.

The invention relates to a preparation method and applications of an aqueous reflective radiation type composite heat insulation paint. The aqueous reflective radiation type composite heat insulationpaint is of a double layer paint layer structure composed of a radiation thermal-insulation paint and a reflective thermal-insulation paint; the radiation thermal-insulation paint is sprayed onto a lower layer; the reflective thermal-insulation paint is sprayed onto an upper layer; the high radiation performance of convenience carbon nanotube and the reflective performance of rutile type titaniumdioxide are combined, reflective thermal insulation effect is achieved by the titanium dioxide at the upper layer; the radiation thermal insulation effect is achieved by the carbon nanotube at the bottom layer. Compared with simple blended single-layer structures, the double-layer structure possesses a following advantage: the reflective effect of rutile type titanium dioxide can be ensured effectively. The aqueous reflective radiation type composite heat insulation paint is low in VOC, is friendly to the environment. The aqueous reflective radiation type composite heat insulation paint possesses excellent reflective performance on visible light and near infrared light, is high in hemispherical emissivity, and excellent in thermal insulation effect, is green, and is friendly to the environment; the preparation method is simple and controllable; construction is convenient; and the aqueous reflective radiation type composite heat insulation paint can be applied on building exterior wallsand petroleum chemical storage tanks based on different requirements.

The invention provides graphene waterborne super-wear-resisting floor paint and a preparation method thereof. The floor paint is prepared from the following components in parts by weight: 60 to 75 parts of polyurethane resin, 8 to 11 parts of modified graphene, 7 to 11 parts of hydroxyethyl cellulose, 15 to 20 parts of dimethylaminoethyl acrylate, 5 to 9 parts of nano zinc oxide, 9 to 17 parts ofnano silicon dioxide, 15 to 26 parts of curing agent, 0.5 to 1.5 part of dispersant, 0.9 to 1.8 parts of flatting agent, 0.4 to 0.8 part of de-foaming agent, 3 to 5 parts of active diluting agent, 30to 60 parts of pigment and filler and 15 to 30 parts of water. According to the graphene waterborne super-wear-resisting floor paint provided by the invention, the wear-resisting performance and mechanical performance of a coating paint film are enhanced; a preparation technology is simple and a prepared product meets the environment-friendly requirements; the graphene waterborne super-wear-resisting floor paint is safe and environmentally friendly and has a wide applicable range.

The invention discloses Bacillus subtilis capable of producing broad spectrum and efficient antibacterial peptide and an application of the Bacillus subtilis and belongs to the technical field of microorganisms, wherein the Bacillus subtilis is Bacillus subtilis BRT39 concretely with the preservation number of CGMCC NO. 5702. Antibacterial peptide in metabolic products of a BRT39 bacterial strain has stronger anti-bacterial effect, a fermentation liquor can inhibit gram positive bacteria and also has stronger inhibiting effect on multiple gram negative bacteria and fungi, and the antibacterial peptide in the fermentation liquor has strong acid-base stability, good thermal stability, strong light stability and high organic solvent tolerance. The antibacterial peptide produced by the BRT39 bacterial strain belongs to a natural antibacterial agent, has no side or toxic effect, can be used as a food preservative, a feed additive, an agricultural biological control agent and an animal disease prevention agent and has the advantages of no toxicity, no residue, no drug resistance and high safety.

The invention provides a conformal coating for protection of a printed circuit board, and a preparation method and a usage method thereof. The conformal coating comprises the following components by weight: 12-30% of organosilicon modified acrylate resin, 10-30% of polyurethane acrylate resin, 20-40% of a fluorine-containing reactive diluent, 10-20% of a fluoride-free reactive diluent, 4-7% of a photoinitiator and 0.1-5.5% of an assistant. The paint film formed by the conformal coating provided by the invention has good water resistance, oil resistance, self-cleaning performance, scratch resistant performance, high glossiness and good adhesion.

The invention belongs to the field of nanomaterial synthesis, in particular to a mesoporous CoCO 3 / g‑C 3 N 4 Methods for the preparation of composite materials. The present invention utilizes a one-step hydrothermal method in CoCO 3 Surface modification of hexahedral nanomaterials g‑C 3 N 4 Construction of 3D / 2D Structured Mesoporous CoCO 3 / g‑C 3 N 4 Composite material, mesoporous CoCO 3 Hexahedral nanomaterial pair g‑C 3 N 4 The modification significantly improves the separation effect of the photogenerated charge carriers in the composite material, which significantly enhances the light-harvesting ability of the composite material and reduces the monomer g‑C 3 N 4 bandgap width, exhibits excellent photocatalytic hydrogen production performance under visible light conditions; the present invention uses CoCO 3 3D materials on monomer g‑C 3 N 4 The surface is modified, the manufacturing process is simple, the controllability is strong, the mass production is convenient, the energy consumption is reduced, the material is easy to obtain, the cost is low, and there is no pollution, which meets the requirements of environmental friendliness. Open up a new way for the sustainable development of energy.

Preparation of Nano-MoS by Polymerization of Dopamine 2 ‑Al 2 O 3 The method for composite rolling lubricant belongs to the technical field of lubrication. The self-polymerization of dopamine into polydopamine is used to modify the surface of molybdenum disulfide nanosheets to obtain polydopamine-modified molybdenum disulfide nanosheets; then aluminum chloride hexahydrate, poly Ethylene glycol 200, sodium acetate, the resulting solution was centrifuged, washed and dried to obtain nano-MoS 2 ‑Al 2 O 3 Composite powder; finally, disperse the prepared composite nano powder into deionized water, add glycerol, triethanolamine, sodium hexametaphosphate, sodium dodecylbenzenesulfonate, aqueous borate ester and trace defoamer, namely The desired compound rolling lubricant can be obtained. The preparation process of the invention is simple, the reproducibility is good, the cost is low and the efficiency is high, and it is beneficial to mass production, and can replace the traditional rolling lubricating oil which pollutes the environment more seriously to a certain extent, and is used for process lubrication in the hot rolling process of plate and strip steel , to promote energy saving and emission reduction and environmental protection production in the strip rolling process.

The invention belongs to synthesis and an application of water-soluble dibasic acid ester, relating to the technical field of organic chemical synthesis methods, overcoming the defect that the traditional lubricating agent such as polyethylene glycol can not meet high load processing requirement and has no rust-proof function. Polyethylene glycol and long carbon chain binary acid are subjected to esterification under the action of a catalyst, a reaction mol ratio of the polyethylene glycol to the long carbon chain binary acid is 2.0-2.5, addition amount of the catalyst is 0.2-0.6%, reaction temperature is 110-130 DEG C, reaction is carried out for 4-6 hours at normal pressure, the polyethylene glycol is esterified, and carbon chain length of a lubricating material is increased, thus lubricating property of the synthesized ester is far better than that of the original polyethylene glycol; and meanwhile, reaction conditions can be controlled, thus the synthesized ester is monoester mainly, the synthesized monoester or diester is biodegradable and meets the requirement of being environmentally-friendly, and the synthesized ester has better lubricating property compared with the original polyethylene glycol and also has a certain rust-proof function.