Affiliation:
1. Southwest Jiaotong University
2. China Jiliang University
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.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science
Reference4 articles.
1. B. Gupta, J. G. Hilborn, I. Bisson and P. Frey: Journal of Applied Polymer Science, Vol. 81 (2001), pp.2993-3001.
2. Y. H. An, R. J. Friedman, R. A. Draughn, E. A. Smith and J. F. John: Human Biomaterials Applications, Humana Press Inc., Totowa, NJ.
3. M. R. Yang, K. S. Chen, J. C. Tsai, C. C. Tseng and S. F. Lin: Materials Science and Engineering C 20 (2002), pp.167-173.
4. H. J. Busscher, A.H. Weerkamp, H. C. Van Der Mei, A. W. J. Van Pelt, H. P. De Jong, contact angle surface energy components.
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