| 초록 |
A surface modification, changing geometric structures or surface energy, is a main factor to develop liquid resistance/repellency properties on a solid surface. Predominantly, roughness from geometric structures offers void spaces that increase energy barriers in nanofibers. In this work, entrapping SiO2 in cellulose acetate (CA) nanofibers imparts nano or microscales protuberances and adds roughness on a surface through an electrospinning process. CA-SiO2 nanofibers with protuberances were developed by various sizes and concentrations of SiO2. Then extended Cassie-Baxter model was applied to predict and measure H*, which is characterized by the inverse relationship with Tnp. The prediction and measurement of the apparent contact angle of CA-SiO2 nanofibers showed good agreement. The result presents the role of imparting protuberances into nanofibers improve liquid resistance/repellence by modifying surface energy and geometric structure. |
