N., Chik and Salwani, Md Zain and Ahmad Johari, Mohamad and Mohd Zaidi, Sidek and Wan Hanisah, Wan Ibrahim and Reif, Alexandra and Rakebrandt, J.H. and Pfleging, W. and Liu, X. (2018) Bacterial adhesion on the titanium and stainless-steel surfaces undergone two different treatment methods: polishing and ultrafast laser treatment. In: 3rd International Conference on Global Sustainability and Chemical Engineering, ICGSCE 2017 , 15-16 February 2017 , Marriot Hotel, Putrajaya; Malaysia. pp. 1-7., 358 (1). ISSN 1757-8981 (Print); 1757-899X (Online)
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Abstract
Bacterial adhesion has become a significant problem in many industries causing billions of dollars for its complicated removal treatment and maintenance. In this study, metal surfaces undergone treatment with ultrafast laser with varies power. The microstructure produced on its original surfaces were expected to prevent the adhesion of Escherichia coli (E. coli) ATCC 8739 and Staphylococcus aureus (S. aureus) ATCC 6838. The laser treatment was performed at 380 fs pulse duration, 515 µm central wavelength and a repetition rate of 200 kHz. Stainless steel AISI 316L was treated with an average laser power of 0.04 W (SS-0.04) and 0.11 W (SS-0.11), while Grade 5 titanium alloy was tested with high laser power 0.11 W (T-0.11). The adhesion was observed after 16 hours and the number of adhering bacteria was counted per cm2. The result achieved shows that, increasing the average laser power is leading to an enhanced S. aureus adhesion while E. coli adhesion is reduced which is due to the hydrophobicity interaction and difference in surface texture. Meanwhile, the laser treatment showed significant reduction of the bacterial adhesion on its surface compared to the polished surfaces. Thus, ultrafast laser texturing can be suggested as a promising method to reduce the bacterial adhesion, which reduced the adhesion of >80% for E. coli and >20% for S. aureus.
| Item Type: | Conference or Workshop Item (Lecture) |
|---|---|
| Additional Information: | Indexed by SCOPUS |
| Uncontrolled Keywords: | Bacterial adhesion; Titanium and stainless-steel; Polishing and ultrafast laser treatment |
| Subjects: | T Technology > TJ Mechanical engineering and machinery T Technology > TK Electrical engineering. Electronics Nuclear engineering T Technology > TP Chemical technology |
| Faculty/Division: | Faculty of Chemical & Natural Resources Engineering Faculty of Electrical & Electronic Engineering Faculty of Mechanical Engineering |
| Depositing User: | Mrs. Neng Sury Sulaiman |
| Date Deposited: | 11 Jun 2019 03:21 |
| Last Modified: | 11 Jun 2019 03:21 |
| URI: | http://umpir.ump.edu.my/id/eprint/22115 |
| Download Statistic: | View Download Statistics |
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