Surface Wettability Modification of Cyclic Olefin Polymer by Direct Femtosecond Laser Irradiation

Nanomaterials

Bing Wang¹  Xincai Wang¹  Hongyu Zheng¹  Yee Cheong Lam¹ 

[1] SIMTech-NTU Joint Laboratory (Precision Machining), Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore; E-Mails:

关键词: femtosecond pulsed laser;    laser power deposition rate (PDR);    cyclic olefin polymer (COP);    wettability;    surface modification;   

DOI  :  10.3390/nano5031442

来源: mdpi

【 摘 要 】

The effect of laser irradiation on surface wettability of cyclic olefin polymer (COP) was investigated. Under different laser parameters, a superhydrophilic or a superhydrophobic COP surface with a water contact angle (WCA) of almost 0° or 163°, respectively, could be achieved by direct femtosecond laser irradiation. The laser power deposition rate (PDR) was found to be a key factor on the wettability of the laser-treated COP surface. The surface roughness and surface chemistry of the laser-irradiated samples were characterized by surface profilometer and X-ray photoelectron spectroscopy, respectively; they were found to be responsible for the changes of the laser-induced surface wettability. The mechanisms involved in the laser surface wettability modification process were discussed.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.