激光诱导前向转移水中制备聚二甲基硅氧烷微粒  

PDMS Particle Fabrications by Laser-induced Forward Transfer within Water

作　　者：麦文豪 邓宇[1] 郭钟宁[1] 洪文生[1] MAI Wenhao;DENG Yu;GUO Zhongning;HONG Wensheng(School of Mechanical and Electrical Engineering,Guangdong University of Technology, Guangzhou,510006)

机构地区：[1]广东工业大学机电工程学院,广州510006

出　　处：《中国机械工程》2018年第8期979-982,共4页China Mechanical Engineering

基　　金：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)

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。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.

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 

分 类 号：TN249[电子电信—物理电子学]