Surface Characterization of Plasma Modified Chitosan Film Using Surface-wave Plasma

摘要

Surface-wave plasma has been used to modify chitosan film surfaces. Chitosan is a nontoxic,biocompatible and biodegradable polymer, which promotes the scarless healing of skin. It is thoughtthat an increase in amino groups included in chitosan molecules will improve its blood clottingproperties. In this study, we focus on the surface modification of chitosan by Ar, O2, NH3 andNH3-He mixed gas plasmas. The experimental results of X-ray photoelectron spectroscopymeasurements showed that N/C atomic ratio increased from 0.069 to 0.147 after NH3 plasmatreatment. The surface roughness for O2 plasma-treated chitosan film surface was strongly changedfrom 1.96 nm to 14.6 nm. The blood clotting property for the plasma-treated chitosan was improved.The blood clotting times treated by NH3 with and without O2 pretreatment were 71.4% and 55.2% compared to untreated one, respectively.