Preparation of Superhydrophobic Coating Using Silica-PMMA Nanocomposite

摘要

Lotus leaf shows high water repellency due to its hierarchical rough structure and thin layer of low surface energy material on it.In this work,superhydrophobic coatings are prepared by silica-polymethylmethacrylate(PMMA)nanocomposite on a glass substrate using a cost effective and simple dip-coating method.The superhydrophobicity of the coatings is controlled by varying the concentration of PMMA in the nanocomposite.At optimum concentration of PMMA,coating shows water contact angle of 155 ± 3° with a rolling angle of 7° as a result of development of rough microstructure.The stability of the coatings is examined by finger wiping,water jet impact,and adhesive tape test.These superhydrophobic coatings can be used in various industrial applications.