Bacterial Adhesion on the Titanium and Stainless-Steel Surfaces Undergone Two Different Treatment Methods: Polishing and Ultrafast Laser Treatment

3rd International Conference on Global Sustainability and Chemical Engineering

工业技术;化学工业

Chik, N.^1 ; Wan Md Zain, W.S.^1 ; Mohamad, A.J.^2 ; Sidek, M.Z.^3 ; Wan Ibrahim, W.H.^1 ; Reif, A.^4 ; Rakebrandt, J.H.^4 ; Pfleging, W.^4 ; Liu, X.^5

Faculty of Chemical and Natural Resources Engineering, Universiti Malaysia Pahang, Pahang, Malaysia^1

Faculty of Electrical and Electronics Engineering, Universiti Malaysia Pahang, Pahang, Malaysia^2

Faculty of Mechanical Engineering, Universiti Malaysia Pahang, Pahang, Malaysia^3

Institute for Applied Materials, Karlsruhe Institute Technology, EggensteinLeopoldshafen

76344, Germany^4

School of Engineering, University of Warwick, Coventry

CV4 7AL, United Kingdom^5

关键词: Bacterial adhesion;    Central wavelength;    Different treatments;    Escherichia coli (E. coli);    Removal treatments;    Stainless steel AISI 316L;    Stainless steel surface;    Staphylococcus aureus;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/358/1/012034/pdf
DOI  :  10.1088/1757-899X/358/1/012034

学科分类：工业工程学

来源: IOP

【 摘 要 】

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.