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Surface and mechanical properties of plasma-modified chitosan/polyvinyl alcohol composite films
Abstract
The surface and mechanical properties of chitosan/polyvinyl alcohol (CS/PVA) composite films modified with O2 and N2 plasma were investigated. The FT-IR method confirmed the presence of characteristic bands originating from both CS and PVA, the intensity of which significantly increased after plasma modification. Plasma treatment also increased the hydrophilicity of CS/PVA films, with a slight decrease in their surface smoothness. In addition, plasma modification reduced the adhesion of bovine serum albumin. The highest fracture toughness and the lowest adhesion of bovine serum albumin were obtained for CS/PVA films (1/3 wt%/wt%). The conducted studies confirmed the possibility of biomedical applications of chitosan/polyvinyl alcohol composite films.
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