Slippery lubricant-infused porous PTFE surfaces for anti-icing
摘要
In recent years, slippery lubricant-infused porous surfaces (SLIPSs) are of great interest in the fields of anti-icing and anti-frosting because of their exceptional liquid-repellency. However, most of the current research about the preparation of SLIPSs has focused on high-strength metal materials with high surface energy. For vulnerable polymer materials with low surface energy, which present a stronger repulsion towards liquid and are applied widely in daily life such as the liquid container or the silo surface of ice cleaning equipment, there was no relevant report yet. Herein, we prepared a SLIPS on PTFE substrate by CO2 laser processing, surface energy modification and lubricating silicone oil infusion. The filamentous fiber structures distributed crisscross in the ablated regions provided a strong adhesion to lubricating oil, thus endowing the SLIPS with excellent sliding performance. In addition, the silicone oil locked by surface rough structure acts as an efficient isolation layer between the droplet and the substrate, resulting in a superior property of anti-freezing rain, delayed icing and easy de-icing. The proposed technology is simple and high-efficient, providing thoughts for the preparation of SLIPSs while expanding the applications of the slippery surfaces.