阅读说明：本技术 一种大管径内覆复合疏水涂层及制备工艺 (Large-pipe-diameter inner-covering composite hydrophobic coating and preparation process thereof ) 是由 谢炜 邵万福 杨添悦 曹太山 王鹏宇 罗奕兵 余小峰 于 2020-11-30 设计创作，主要内容包括：一种大管径内覆复合疏水涂层及制备工艺,涂料由聚四氟乙烯、其它水性氟碳树脂、无机纳米粒子、助剂、添加剂、水组成；涂层制备工艺包含：(1)制备多维度复合涂料：(2)过滤；(3)涂料在使用前,在25-50℃下保温0.2-1.5h,然后采用涂刷、或辊涂、或喷涂于大管径管件内壁；(4)在后续热处理装置内,将大管径内覆复合疏水涂层管件在60-150℃条件下、保温10-60 min。其工艺简单、疏水性能好,尤其适合于大管径内覆疏水涂层的现场施工。(A large-diameter inner-coated composite hydrophobic coating and a preparation process thereof, wherein the coating consists of polytetrafluoroethylene, other aqueous fluorocarbon resin, inorganic nano particles, an auxiliary agent, an additive and water; the preparation process of the coating comprises the following steps: (1) preparing a multi-dimensional composite coating: (2) filtering; (3) before use, the coating is insulated for 0.2 to 1.5 hours at the temperature of between 25 and 50 ℃, and then is coated on the inner wall of a large-diameter pipe fitting by brushing, roller coating or spraying; (4) in a subsequent heat treatment device, the pipe fitting coated with the composite hydrophobic coating in the large-diameter pipe is subjected to heat preservation for 10-60 min at the temperature of 60-150 ℃. The method has simple process and good hydrophobic property, and is particularly suitable for the field construction of large-diameter inner-coated hydrophobic coatings.)