Surface treatment of biopolymer films Polylactic acid and Polyhydroxybutyrat with angular changing oxygen plasma ‒ More than just gradual purification
Surfaces and Interfaces（2022）
Abstract
•WVTR of PLA decreases more with indirect O2 plasma than with direct.•Contact angle of PHB decreases with increasing treatment angle.•Roughness of PLA surfaces is angle-dependent – PHB shows statistical behavior.•Polar component of the SFE is angle-dependent with indirect O2 plasma.•Mobility and contact angle hysteresis increase for both polymers angle-dependent.
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Key words
plasma enhanced CVD,Wettability,AFM,Surface free energy,Contact angle hysteresis,Water vapor transmission
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