摘要
使用CO_2激光器对聚四氟乙烯(PTFE)表面进行微加工,通过设计需要加工的图案,对加工间距、功率和加工次数等参数的控制,能获得浸润性可控的超疏水表面。扫描电子显微镜和接触角测量用于表征表面形貌结构和润湿性。研究了激光不同加工间距、不同加工功率及不同加工次数对表面浸润性和表面形貌的影响。结果表明,制备的超疏水表面各向异性程度随着条纹间距的增大而增大,使用不同的功率加工5次可实现相同的各向同性结构,相同条件下加工4次可以实现各向异性向各向同性的转变。CO_2激光微加工技术可用于大规模加工制备超疏水表面,进而用于微流控器件、定向集水及减阻、实验室芯片系统等领域。
The superhydrophobic surface with controllable wettability was fabricated by CO2 laser micromaching polytetrafluoroethylene（PTFE） through designing pattern needed to be processed and controlling the parameters of processing spacing, power and number of times. The structure and wettability of the surface were characterized by scanning electron microscope（SEM） and contact angle measuring instrument. The effects of different stripes spacing, processing power and processing number of times on surface wettability and morphology were studied. The experimental results show that the degree of anisotropy of as-prepared superhydrophobic surface increases with the increase of stripe spacing, the similar isotropic structure can be achieved by processing five times at different processing power, processing four times can achieve a transformation from anisotropy to isotropy under the same conditions. CO2 laser micromaching technology can be used for large-scale preparation of superhydrophobic surface for microfluidic devices, directional water harvesting and drag-reduction, lab-on-chips system and other fields.
作者
占彦龙
李文
李宏
胡良云
Yanlong Zhan;Wen Li;Hong Li;Liangyun Hu(School of Physics and Electronic Science, Hubei Normal University, Huangshi 435002, China;Hubei Key Laboratory of Mine Environmental Pollution Control ＆ Remediation , Hubei Polytechnic University, Huangshi 435003, China)
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2018年第4期147-151,158,共6页
Polymer Materials Science & Engineering
基金
国家自然科学基金资助项目(51272082)
国家自然科学基金青年基金资助项目(21603070)
