Plasma pre-treatment and TiO2 coating of PMMA for the improvement of antibacterial properties |
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| Authors: | Wenyue Su Shichao Wang Xianzhi Fu Jingning Weng |
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| Affiliation: | a Research Institute of Photocatalysis, State Key Laboratory Breeding Base of Photocatalysis, Fuzhou University, Fuzhou 350002, PR Chinab Department of Ophthalmology, Union Hospital, Fujian Medical University, Fuzhou 350001, PR China |
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| Abstract: | The antibacterial properties of polymethyl methacrylate (PMMA) are enhanced by coating with TiO2 films. The transparent TiO2 films on plasma-treated PMMA are prepared by sol-gel dip coating. The modified surfaces are characterized by XRD, AFM, ATR-FTIR, SEM, UV-vis spectroscopy, and contact angle measurements. Finally, the antibacterial properties are evaluated using the method of plate-counting of Staphylococcus aureus (gram positive) and Escherichia coli (gram negative). It is found that the anatase-TiO2 film is well-conglutinated on PMMA surface with an average crystallite size of ca. 4 nm. The as-prepared TiO2/PMMA exhibits excellent photoinduced antibacterial effect for the sterilization of bacteria under indoor natural light, and about 100% of both bacteria are inactivated within 2 h illumation. Compared to PMMA without any treatment, the superior anti-adhesion capability of the TiO2/PMMA surface is also demonstrated. |
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| Keywords: | Antibacterial coating Polymethyl methacrylate (PMMA) Plasma pre-treatment TiO2 film Natural light sterilization |
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