中国激光, 2014, 41 (9): 0903008, 网络出版: 2014-07-22
皮秒激光制备超疏水聚四氟乙烯表面及其水下全反射研究
Super-Hydrophobic Surface of Polytetrafluoroethylene Fabricated by Picosecond Laser and Phenomenon of Total Internal Reflection Underwater
激光技术 皮秒激光加工 聚四氟乙烯 超疏水性 水下全反射 laser technique picosecond laser processing polytetrafluoroethylene super-hydrophobicity total internal reflection underwater
摘要
在室温空气条件下，利用1064 nm皮秒激光加工系统在聚四氟乙烯(PTFE)表面加工出平均缝宽为25 μm、壁厚为25 μm、深度为75 μm的沟槽阵列和边长为30 μm、缝宽为25 μm、高度为43 μm的柱状阵列。加工后的聚四氟乙烯表面静态接触角达到167°，为超疏水表面。将制备出的超疏水聚四氟乙烯完全浸入纯净水中，通过玻璃器皿观察，其超疏水表面在水下出现金属光泽。实验发现，超疏水聚四氟乙烯表面在水下可使以一定角度斜入射的可见光反射光强增加。利用浸润性模型分析该现象出现的原因是超疏水表面在水下发生了全反射。
Abstract
A groove-shaped array with average 25 μm interval, 25 μm wall thickness, 75 μm depth and a columnar array with average 30 μm side length, 25 μm interval, 43 μm depth are processed by 1064 nm picosecond laser on polytetrafluoroethylene (PTFE) surface at room temperature. The water contact angle of the modified PTFE surface is 167° so that super hydrophobic surface of PTFE is prepared. It is observed that the super-hydrophobic surface reflects metal luster underwater through the glassware when the super-hydrophobic PTFE is entirely immersed in pure water. The experiment conducts that the super-hydrophobic surface can enhance reflection intensity of visible light due to total internal reflection of super-hydrophobic surface underwater.
曹文深, 赵艳, 吴燕, 蒋毅坚. 皮秒激光制备超疏水聚四氟乙烯表面及其水下全反射研究[J]. 中国激光, 2014, 41(9): 0903008. Cao Wenshen, Zhao Yan, Wu Yan, Jiang Yijian. Super-Hydrophobic Surface of Polytetrafluoroethylene Fabricated by Picosecond Laser and Phenomenon of Total Internal Reflection Underwater[J]. Chinese Journal of Lasers, 2014, 41(9): 0903008.
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