摘要
利用飞秒激光加工系统对PMMA表面制备微结构,调节激光的加工次数和微结构的尺寸参数,研究PMMA表面的润湿性机理。激光制备出光栅结构和方柱结构,采用超景深三维显微镜和接触角测量仪对微结构表面形貌和润湿性进行测量分析。研究了不同的激光加工次数和微结构尺寸对表面润湿性的影响,结果表明:PMMA表面微结构的接触角随光栅结构间距的增大而减小,随光栅结构的高度增大而增大,最大接触角达到120°;相较于光栅结构,制备出的方柱结构的接触角更大,与理论计算值比较接近;激光加工PMMA表面微结构可以将PMMA润湿性从亲水向疏水状态转变,微结构间距过小会导致激光加工时飞溅的熔融物堆积在结构通道。
The microstructure of PMMA was prepared by femtosecond laser processing system.The wettability mechanism of PMMA surface was studied by adjusting the number of laser processing and the size parameters of microstructure.Firstly,the grating structure and square column structure were fabricated by laser.The surface morphology and wettability of the microstructure were measured and analyzed by the super depth 3D microscope and contact angle measuring instrument.The influence of different laser processing times and microstructure size on the wettability of the surface was studied.The results show that the contact angle of the surface microstructure of PMMA decreases with the increase of the grating spacing,and increases with the increase of the grating height,and the maximum contact angle reach 120°.Compared with the grating structure,the contact angle of the square column structure is larger,which is close to the theoretical value.The wettability of PMMA can be changed from hydrophilic state to hydrophobic state by laser processing of the surface microstructure of PMMA.Too small spacing of the microstructure will lead to the accumulation of splashed melt in the structure channel during laser processing.
作者
李江澜
汪帮富
王中旺
宋娟
LI Jiang-lan;WANG Bang-fu;WANG Zhong-wang;SONG Juan(Tianping College of Suzhou University of Science and Technology,Suzhou 215009,China;Suzhou University of Science and Technology,Suzhou 215009,China)
出处
《激光与红外》
CAS
CSCD
北大核心
2021年第2期149-155,共7页
Laser & Infrared
基金
国家重点研发计划项目(No.2018YFB1107700)
广东省省级科技计划项目(No.2017B090911013)
江苏省科技计划项目(No.BA2018070)
苏州市科技计划项目(No.SYG201703)资助。
关键词
飞秒激光
疏水表面
表面改性
PMMA微结构
润湿性
femtosecond laser
hydrophobic surface
surface modification
PMMA microstructure
wettability
