Preparation method for super-hydrophobic silica particle and super-hydrophobic coating

Abstract

The invention provides a preparation method for super-hydrophobic silica particles and super-hydrophobic coatings. The method includes the following steps that in step S1, nanometer silica particles and silane modifiers are dispersed in a solvent to form a mixed solution, wherein weight ratio for nanometer silica particles and silane modifiers and the solvent is 1:0.05-0.5:3-20; the PH value of the mixed solution is adjusted to 2.0-5.0 by hydrochloric acid, and then the mixed solution is stirred for 2 to 24 hours at the temperature from 0 DEG C to 50 DEG C; the PH value of the mixed solution is adjusted to 6.0-7.5 by ammonia water, and then the mixed solution is stirred for 0.5 to 3 hours; a dispersion solution of modified nanometer silica particles is achieved; in step S2 the dispersion solution is dispersed into droplets by an ultrasonic nebulization technology and is dried at the temperature from 80 DEG C to 120 DEG C; the super-hydrophobic silica particles are achieved. With the preparation method for super-hydrophobic silica particles and super-hydrophobic coatings, the super-hydrophobic silica particles and the super-hydrophobic coatings are achieved, and have the advantages of being good in super-hydrophobic effect and simple in manufacturing process. 本发明提出了一种超疏水二氧化硅粒子的制备方法，包括以下步骤：步骤S1、将纳米二氧化硅粒子和硅烷改性剂分散在溶剂中以形成混合溶液，其中，纳米二氧化硅粒子、硅烷改性剂和溶剂的质量比为1：0.05～0.5：3～20；再用盐酸将混合溶液的pH值调节到2.0～5.0，并在0℃～50℃下搅拌2h～24h；再用氨水将该混合溶液的pH值调节至6.0-7.5，并搅拌0.5h～3h，从而得到改性二氧化硅纳米粒子的分散液；步骤S2、将分散液超声雾化成液滴，并在80℃～120℃下干燥，得到超疏水二氧化硅粒子。采用本发明的超疏水二氧化硅粒子及超疏水涂层的制备方法可以制备出超疏水二氧化硅粒子及超疏水涂层，具有良好的超疏水效果，生产过程简单实用。