A simple method for preparation of transparent hydrophobic silica-based coatings on different substrates

作者：Wang Fang; Wang Xiufang; Xie Anjian; Shen Yuhua^*; Duan Wei; Zhang Ye; Li Jialin

来源：Applied Physics A, 2012, 106(1): 229-235.

DOI：10.1007/s00339-011-6566-y

A facile, inexpensive, and general approach is explored for the fabrication of transparent silica/organic silicon hybrid sol, which could form transparent hydrophobic coatings on different substrates conveniently. The sol was prepared by using hexamethyldisilazane (HMDS) as a surface-modifying agent and the source of base catalyst required for the hydrolysis of tetraethoxysilane (TEOS). The resulting silica-based coatings on glass slide have shown an optical transmission over the visible range up to 89% (in reference to 100% transmission defined by a plain glass substrate) and high thermal stability. The water contact angle of the film reached 152(au <). Hydrophobic coatings with excellent optical transmittance were also successfully formed on writing paper and aluminum foils. The transparent hydrophobic silica-based hybrid sol will have potential applications in creating outdoor building glass, protecting paper files from moisture and preventing metals from corrosion.

• 出版日期2012-1
• 单位安徽大学