皮秒激光制备大面积荷叶结构及其硅橡胶超疏水性压印研究  

Picosecond Laser Fabrication of Large-Area Surface Micro-Nano Lotus-Leaf Structures and Replication of Superhydrophobic Silicone Rubber Surfaces

作　　者：林澄[1] 钟敏霖[1] 范培迅[1] 龙江游[1] 龚鼎为 张红军[1] 

机构地区：[1]清华大学材料学院激光材料加工研究中心先进成形制造教育部重点实验室,北京100084

出　　处：《中国激光》2014年第9期109-116,共8页Chinese Journal of Lasers

基　　金：国家自然科学基金重大国际(地区)合作研究项目(51210009)

摘　　要：超疏水自清洁荷叶结构表面有重要应用潜力。运用高功率皮秒激光结合高速扫描振镜,在H13模具钢表面高效制备了密排六方点阵微米级凹坑,其中含有丰富的纳米级亚结构,获得了面积为25mm×25mm的反荷叶结构。将该结构用于超疏水微纳米压印模板,在165℃、6MPa、大气环境中进行硅橡胶压印,获得大面积微米级突起阵列,表面分布着纳米级亚结构,与荷叶结构十分相似。压印后硅橡胶表面接触角达到153.3°,接触角滞后值为3.2°,实现了超疏水性。皮秒激光制备的模板能进行连续压印,具有一定的耐久性和连续压印能力。The self-cleaning lotus-leaf-like superhydrophobic surfaces are of great importance for various potential applications.Micro craters in hexagonal matrix with nano substructures are effectively fabricated on mold steel（H13）with an area of 25 mm×25 mm by means of a high-power picosecond laser in cooperated with a high-speed galvo scanner.This kind of micro-nano structured H13 surface is used as a micro-nano imprinting master for replicating superhydrophobic silicone rubber surfaces under 165℃,6 MPa in ambient air.Micro protuberances decorated by nano substructures,similar to those of lotus leaf,are formed onto the printed surfaces of silicone rubber,transforming the rubber surfaces to be superhydrophobic with a contact angle of 153.3°and a contact angle hysteresis of 3.2°.The picosecond laser fabricated micro-nano template is capable for repeated imprinting with good durability.

关 键 词：激光光学 皮秒激光 微纳米复合结构 微纳米压印 硅橡胶 超疏水性 

分 类 号：TN249[电子电信—物理电子学]