Poly(Hydroxybutyrate-<i>co</i>-9% Hydroxyvalerate) Film Surface Modification by Ar, O₂, H₂,O/O₂, H_2O, and H₂O₂Plasma Treatment

Abstract

Abstract We modified poly(hydroxybutyrate-co-9% hydroxyvalerate) film surfaces with Ar, O2, H2O/O2, H2O, and H2O2 vapor plasma treatments. We measured the grafted oxygen concentration by XPS analyses and the wettability by a θH2O contact angle method. Comparison between these various plasma treatments seems to indicate a better surface wettability correlated to C-OH bonds obtained with H2O and H2O2 plasma than with Ar and O2 plasma which incorporate oxygen atoms in C˭O bonds more easily.