Antibacterial properties of chitosan-based coatings are affected by spacer-length and molecular weight
作者： Juliana M. Vaz , Thiago B. Taketa , Jacobo Hernandez-Montelongo , Pascale Chevallier , Monica A. Cotta
DOI: 10.1016/J.APSUSC.2018.03.110
关键词:
摘要: Abstract Chitosan is a biopolymer with antibacterial properties, which are dependent on its molecular weight (Mw) and degree of deacetylation (DDA). When grafted surfaces as coating, chitosan efficiency also the polymer chain conformation surface, amine groups, responsible effect, should be available for contact bacteria. To investigate this behavior, chitosans different Mw were onto plasma aminated through three spacers: glutaric anhydride (GA), poly(ethylene–glycol) bis(carboxymethyl) ether (PEGb), poly(ethylene-alt-maleic anhydride) (PA). The grafting was evaluated by X-ray Photoelectron Spectroscopy (XPS), angle Rose Bengal test, while morphological features assessed profilometry analyses. Results evidenced clear influence anchor arm length both behavior. PA CHIMW surface exhibited better response compared to GA PEGb, could correlated denser coating coverage seen XPS results. Further, displayed higher density, thus promoting interaction bacteria cell wall. Based these results, chitosan-based coatings can then extended wide range applications.
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