33results about How to "With hydrophobic function" patented technology

The invention provides a hydrophobic silicon dioxide / polyimide aerogel composite material. The hydrophobic silicon dioxide / polyimide aerogel composite material comprises hydrophobic modified silicon dioxide aerogel and polyimide aerogel, wherein the polyimide aerogel is used as a substrate of the composite material, and hydrophobic modified silicon dioxide aerogel fillers are embedded into pores of the polyimide aerogel. According to the hydrophobic silicon dioxide / polyimide aerogel composite material, the silicon dioxide aerogel is added to the polyimide aerogel; the polyimide aerogel is usedas the substrate and a framework of a composite heat insulation material to realize the supporting reinforcing effect, so that the mechanical strength of the composite heat insulation material is improved; and the silicon dioxide aerogel is used as the filler and has the hydrophobic function and outstanding heat insulation performance, so that the heat insulation effect is realized in the composite material. The hydrophobic silicon dioxide / polyimide aerogel composite material comprehensively considers the physical performance and the mechanical performance of the composite heat insulation material and has the advantages of being high in strength, high in high temperature resistance, low in volume weight, low in heat conductivity, and high in waterproofing performance, and meets the requirements on performances of the heat insulation material in actual application.

The invention discloses a preparation method of a composite membrane with a hydrophobization function. The preparation method comprises the following steps: performing membrane scraping for multiple times on a glass plate by a mixed polytetrafluoroethylene liquid and curing for forming a membrane in a gelling bath to obtain a base membrane layer; dissolving poly-perfluoroalkyl ethyl acrylic ester granules in a mixed solution of monofluoride dichloroethane (HCFC-141b) and fluorosilane and stirring; adding epoxy resin and a phenolic aldehyde amine epoxy hardener to obtain a new mixed solution; mixing the new mixed solution with E type epoxy resin to obtain a mixture and applying the mixture onto the base membrane layer; and performing drying to obtain the composite membrane with the hydrophobization function. In the way, the preparation method of the composite membrane with the hydrophobization function has the advantages that the raw materials are extensive in source and easy to obtain, the preparation process is simple, and the preparation method is easy to operate without over-high requirements on the operation technique of operators and can effectively save cost; the obtained composite membrane with the hydrophobization function has certain hardness and strength and is excellent in hydrophobization performance.

The invention discloses a high-temperature-resistant drag-reducing energy-saving heavy-duty anti-corrosion coating for thermal pipeline inner walls. The coating contains two components of A and B, wherein the weigth percentages of the component A comprise: phenolic epoxy resin 20%-30%, organosilicone epoxy hybrid resin 20%-30%, silicone-free polymer defoamer 0.3%-0.5%, pigment-affine-group-containing polymer interpolymer dispersant 0.5%-0.7%, hydrophobic fumed silica 0.35%-0.5%, castor oil modified derivative rheological additive 0.35%-0.8%, modified zinc phosphate 3.0% to 5.0%, aluminum tripolyphosphate 2.0%-4.0%, mica powder 10.0%-20.0%, talcum powder 10.0%-15.0%, titanium dioxide 5.0%-10.0%, polytetrafluoroethylene powder 2.0%-5.0%, xylene 2.0%-7.0%, and n-butanol 1.0%-3.0%; and the weight percentages of the component B comprise: modified alicyclic amine 72.5%-75.5%, and aminoalkoxysilane 24.5%-27.5%. The coating can effectively protect thermal pipelines, and reduce maintenance andpipe cleaning frequency, and has a positive effect on urban central heating.