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Surface Characterization and Antibacterial Evaluation of Poly(Ethylene Terephthalate) Modified by Chitosan-Immobilization

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Abstract:

Biomedical PET films were modified by the approach of chitosan-surface-grafting. Attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR) and X-ray photoelectron spectroscopy (XPS) revealed that chitosan molecules were successfully grafted on the PET surface. The bacterial adhesion on the modified surface was evaluated by bacteria plate counting in vitro and scanning electron microscopy (SEM). The results testified that chitosan did make the surface of PET become more antibacterial. The free energy of adhesion (∆Fadh) between the bacteria and the chitosan-immobilized surface of PET was calculated. The value of the ∆Fadh was positive, which suggests that the process of bacterial adhesion on the modified PET surface was not thermodynamically favorable, namely, not spontaneous.

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Advanced Biomaterials VI View Preview

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Periodical:

Key Engineering Materials (Volumes 288-289)

Pages:

331-334

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.288-289.331

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Online since:

June 2005

Authors:

Peng Li, Jin Wang, W.C. Lu, H. Sun, Nan Huang

Keywords:

Antibacterial, Chitosan (CS), PET, Surface Modification

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© 2005 Trans Tech Publications Ltd. All Rights Reserved

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