Non-supercritical drying sol-gel preparation of superhydrophobic aerogel ORMOSIL thin films with controlled refractive index

作者：Zhang, Xinxiang^*; Su, Wenmu; Lin, Mingyue; Miao, Xia; Ye, Longqiang; Yang, Wenbin; Jiang, Bo

来源：Journal of Sol-Gel Science and Technology, 2015, 74(3): 594-602.

DOI：10.1007/s10971-015-3638-z

• Sol-gel process
• ORMOSIL
• Superhydrophobic
• Aerogel
• Thin film

Superhydrophobic aerogel ORMOSIL (organically modified silicate) thin films with controlled refractive index were prepared by a one-pot sol-gel process without supercritical drying. The method involved the preparation of ORMOSIL particles by co-condensation of tetramethylorthosilicate (TEOS) and dimethyldiethoxysilane (DDS) and a further surface modification of ORMOSIL particles with hexamethylsilazane. The particle growth process of ORMOSIL sols and the drying process of aerogel ORMOSIL thin film are discussed in detail. The co-condensation of TEOS and DDS and the surface modification significantly improved the hydrophobicity and hence the environmental resistance of the thin films; the water contact angles of the thin films increased from 23A degrees to 151A degrees. A superhydrophobic aerogel ORMOSIL thin film with refractive index as low as 1.10 was obtained. In addition, the refractive indices can be tailored in the range of 1.10-1.23. @@@ Superhydrophobic aerogel ORMOSIL (organically modified silicate) thin films with controlled refractive index were prepared by sol-gel process without supercritical drying.

• 出版日期2015-6
• 单位福建农林大学