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http://dx.doi.org/10.5757/JKVS.2009.18.1.001

Surface Modification of Polystyrene (PS) by Atmospheric Pressure Plasma  

Lee, Jong-Su (Research & Development Center, P&I Corp)
Shin, Hyun-Seok (Research & Development Center, P&I Corp)
Seok, Jin-Woo (Research & Development Center, P&I Corp)
Jang, Gyu-Wan (Research & Development Center, P&I Corp)
Beag, Yeong-Hwan (Research & Development Center, P&I Corp)
Publication Information
Journal of the Korean Vacuum Society / v.18, no.1, 2009 , pp. 1-8 More about this Journal
Abstract
Hydrophilic Surface modification of Polysarene (PS) was performed by Atmospheric Pressure Plasma (APP). Air or 0, gases were used for carrier gases and RF power was changed from 150 to 350 W. We controlled the treatment time as 1 time to 4 time passing through the plasma region. when the carrier gas was air, the water contact angle on the PS surface was decreased from $91^{\circ}$ to $20^{\circ}$. And the surface energy increased from 45.74 dyne/cm to 68.48 dyne/cm. In case of the $O_2$ plasma treatment, at 300 W of RF power and 4 times treatment, the water contact angle on the PS. Surface was decreased from $91^{\circ}$ to $17^{\circ}$ and the surface energy was increased from 45.74 dyne/cm to 69.73 dyne/cm. The surface energy was increased by polar force not by dispersion force. Improvement of surface properties can be explained by the formation of new hydrophilic groups which is identified as C-O, C=O by XPS analysis. The contact angle of APP treated PS surface kept in air was increased with time elapse, but maintained same value when it was kept in water. We treated the PS surface by APP and deposited Cu as $4,000\;{\AA}$ and $8,000\;{\AA}$ by thermal evaporation. The adhesion between sample and Cu thin film improvement of treated PS surface against untreated sample. could be verifiable by Tape test (ASTM D3359)
Keywords
Atmospheric pressure plasma; APP; Surface modification; Polystyrene; PS;
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