Super Hydrophobic Biomimetic Preparation and Properties Research Based on Cherry Blossom Leaves Veins

Abstract

According to some scientific evidence, cherry blossom leaves have natural super hydrophobic properties, and there may be micron-sized stomata or nano-scale waxy protrusions on their surface, and such structures can trap air and form an air cushion (Cassie-Baxter state) to help improve hydrophobicity. The skin of cherry blossom leaves with a waxy layer is covered with hydrophobic wax (the main components are long-chain alkanes, fatty acid esters, etc.), which can reduce the surface energy and make the water’s contact angle reach 100˚ - 140˚ (close to but not up to the super hydrophobic standard > 150˚). We adopted the method of coating the surface of cherry blossom leaves silica silicone model with a low-surface-energy fluorinated polymer, and their surface energy can be further reduced, and also increase the water contact angle. This fluorination treatment enhances hydrophobicity without damaging the original microstructure. Since water droplets form spherical shapes on the leaf surface and roll off easily, the model achieve a super hydrophobic effect. Additionally, using micro-nano fabrication techniques can create more micrometer or nano meter-scale structures on the leaf surface of Cherry blossom leaves, further enhancing hydrophobicity and achieving a super hydrophobic surface. Inspired by this property, this essay will use cherry blossom leaves to make a super hydrophobic structure and fluorinate it to satisfy the super hydrophobic standard.