| 激光诱导前向转移水中制备聚二甲基硅氧烷微粒 |
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| 引用本文： | 麦文豪,邓宇,郭钟宁,洪文生. 激光诱导前向转移水中制备聚二甲基硅氧烷微粒[J]. 中国机械工程, 2018, 29(8): 979 |
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| 作者姓名： | 麦文豪 邓宇 郭钟宁 洪文生 |
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| 作者单位： | 广东工业大学机电工程学院，广州，510006 |
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| 基金项目： | 国家自然科学基金资助项目(51175091)；广东省青年创新人才(自然)项目(2015KQNCX027)National Natural Science Foundation of China（No. 51175091） |
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| 摘 要： | 聚二甲基硅氧烷（PDMS）的表面能低、黏度大，难以在空气中制备微型球粒。利用激光诱导前向转移技术在水中制备PDMS微粒，深入研究了激光能量、光斑直径对PDMS粒径的影响，发现微粒平均直径为20～100μm，并随光斑直径增大而增大，随激光能量增大而减小，且微球表面光滑。同时，利用高速摄像机对水中激光诱导前向转移工艺进行研究，结果表明，激光诱导钛层形成空化泡，溃灭时形成的射流将PDMS脱离形成微滴，固化后成为微球粒。
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| 关 键 词： | 激光诱导前向转移 聚二甲基硅氧烷微粒 高速摄像机 空化射流 |
PDMS Particle Fabrications by Laser-induced Forward Transfer within Water |
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| MAI Wenhao,DENG Yu,GUO Zhongning,HONG Wensheng. PDMS Particle Fabrications by Laser-induced Forward Transfer within Water[J]. China Mechanical Engineering, 2018, 29(8): 979 |
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| Authors: | MAI Wenhao DENG Yu GUO Zhongning HONG Wensheng |
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| Affiliation: | School of Mechanical and Electrical Engineering,Guangdong University of Technology,Guangzhou,510006 |
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| Abstract: | PDWS was characterized with low surface energy and high viscosity, which made it difficult to form a sphere particles in air. PDMS particles were fabricated within water by laser-induced forward transfer processes. The effects of laser energy and spot sizes on mean diameters of PDMS particles were experimentally investigated, and it turned out that the spot size plays a positive role on enlarge the particles while the pulse energy influences it negatively, and the fabricated PDMS particles have diameter range of 20～100μm and great surface quality. With high speed camera, the particle formation processes were observed, and it resulted from a jet generated by laser induced thermal cavitation. |
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| Keywords: | laser-induced forward transfer Polydimethylsiloxane (PDMS) particle high-speed camera cavitating jet |
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