Improvement of chitosan adsorption onto cellulosic fabrics by plasma treatment.
Oxygen plasma treatment was applied in order to improve the adsorption of chitosan onto viscose fabric. Modification of the surface and adsorption of chitosan was monitored by determination of XPS spectra, determination of contact angles from rates of water imbibition, and conductometric titration. The plasma treatment resulted in hydrophilization of the surfaces through oxidation. The hydrophilic surfaces were stable for at least 24 h. The treatment also yielded binding sites that resulted in over 20% increase of the amount of chitosan adsorbed over that adsorbed on nontreated fabric. Layers of chitosan adsorbed after plasma treatment were substantially more active as antimicrobial agents than those on nontreated surfaces.
Fras Zemljic
Lidija
L
Laboratory for Characterization and Processing of Polymers, Faculty of Mechanical Engineering, University of Maribor, Smetanova 17, 2000 Maribor, Slovenia. lidija.fras@uni-mb.si
Persin
Zdenka
Z
Stenius
Per
P
D000327:Adsorption; D001665:Binding Sites; D001672:Biocompatible Materials / Q000737:chemistry*; D002482:Cellulose / Q000737:chemistry*; D048271:Chitosan / Q000737:chemistry*; D010100:Oxygen / Q000737:chemistry*; D013499:Surface Properties; D013784:Textiles
D001672:Biocompatible Materials; D002482:Cellulose; D048271:Chitosan; D010100:Oxygen