Method for preparing lipophilic nano SiO2 powder

Abstract

The invention relates to a preparation method for a lipophilic nanometer powder SiO2. The procedure of the preparation method comprises: (1) the nanometer powder SiO2 is acted as an initial raw material, an activated surface treatment is applied with a hydrogen peroxide solution; (2) the surface of the nanometer powder SiO2 is modified and processed in an aqueous and oil phase mixed liquid with a Gamma -(methacryloyldoxy) propyltrimethoxysilane modifying agent, a dispersion liquid of the lipophilic nanometer powder SiO2 is produced; (3) the lipophilic nanometer powder SiO2 is made after the processing of liquid separating, distilling, and drying. The lipophilic nanometer powder SiO2 has the advantages of simple process, easy industrial production, and good compatibility of the lipophilic nanometer powder SiO2 with the organic solvent and even dispersion.

Description

technical field

[0001] The invention belongs to nano SiO 2 The field of preparation, especially involving a kind of lipophilic nano-SiO 2 Powder preparation method. Background technique

[0002] nano-SiO 2 It has optical properties such as ultraviolet light absorption and infrared reflection. A large number of unsaturated residual bonds and hydroxyl groups in different states in its molecular structure can bond with some groups in the coating to improve the thermal and chemical stability of the coating. sex. In addition, nano-SiO 2 When the coating film is dry, it can form a network structure, which has a significant effect on improving the aging resistance, smoothness, strength and anti-corrosion performance of the coating. Although nano-SiO 2 Modified coatings have many excellent properties, but nano-SiO 2 A large number of hydroxyl groups on the surface make it hydrophilic, easy to agglomerate, and poor storage stability. The uniform dispersion of nanoparticles in...

Images