Lau, Yen Theng and Chin, Oi Hoong and Lee, Hong Chun and Chiu, Wee Siong and Woo, Haw Jiunn (2022) Plasma surface treatment of polystyrene in a low power low frequency argon glow discharge. Applied Surface Science, 578. ISSN 0169-4332, DOI https://doi.org/10.1016/j.apsusc.2021.151963.
Full text not available from this repository.Abstract
A low power low frequency (50 Hz) argon plasma was used to treat the surface of polystyrene (PS) films. Plasma treatment for 3 min produced the best hydrophilic enhancement and it corresponded to doubling of the surface energy. At 45 Pa and flowrate of 44 sccm, a `saturation' region in terms of lowest water contact angle (WCA) attained (WCA = 21 degrees +/- 3 degrees), occurred at low discharge power of 0.15-0.25 W (applied power of 3-8 W). The induced hydrophilicity was attributed mainly to the oxygen-containing functional groups incorporated on the PS surface during the plasma treatment. Oxygen was speculated to be sourced from the dissociation of residual water vapour in the reactor chamber. Upon exposure to the laboratory environment, rapid hydrophobic recovery of the treated samples occurred but WCA stabilized after 72 h and remained at >30 degrees below its value at pristine condition.
| Item Type: | Article |
|---|---|
| Funders: | Universiti Malaya [Grant No: PG062-2016A], RU Grant-Faculty Program [Grant No: GPF042B-2018] |
| Uncontrolled Keywords: | 50 Hz glow discharge; Plasma treatment; Polystyrene; Hydrophilicity; Residual water vapour |
| Subjects: | Q Science > Q Science (General) Q Science > QC Physics Q Science > QD Chemistry |
| Divisions: | Faculty of Science |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 20 Jul 2022 08:30 |
| Last Modified: | 20 Jul 2022 08:30 |
| URI: | http://eprints.um.edu.my/id/eprint/33666 |
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