Anti-bacterial performance evaluation of hydrophobic poly (dimethylsiloxane)-ZnO coating using Pseudomonas aeruginosa
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ORIGINAL PAPER
Anti‑bacterial performance evaluation of hydrophobic poly (dimethylsiloxane)‑ZnO coating using Pseudomonas aeruginosa Innocent O. Arukalam1,2,3 · Dake Xu4 · Ying Li1 Received: 14 January 2020 / Accepted: 16 May 2020 © Institute of Chemistry, Slovak Academy of Sciences 2020
Abstract Pseudomonas aeruginosa (P. aeruginosa) has been implicated in the attachment and formation of marine biofilms which initiate biofouling and biocorrosion. To this end, several hydrophobic and superhydrophobic coatings have been suggested for anti-bacterial application, but some possess toxic substances which affect useful aquatic lives. Thus, the aim of this study was to appraise the anti-bacterial and anti-corrosion performance of hydrophobic perfluorodecyltrichlorosilane (FDTS)-modified poly (dimethylsiloxane) (PDMS)-ZnO coating using P. aeruginosa. The surface analytical, physico-chemical and electrochemical techniques were used to investigate the properties of the coatings. Results show that FDTS-modified PDMS-ZnO coating displayed higher resistance to adhesion of P. aeruginosa biofilm and better corrosion resistance performance than the unmodified coating. The outstanding performance of FDTS-modified coating was attributed to the low surface activity of FDTS which increased the kinetic barrier between the coating surface and biofilm. It is therefore anticipated that these results would provide insight in the design of future anti-bacterial coatings for marine application. Keywords Anti-bacterial · Corrosion · Hydrophobic coating · Poly (dimethylsiloxane) · Pseudomonas aeruginosa
Introduction Engineering structures deployed for marine operations are usually confronted with the challenges of biofouling and biocorrosion. Because these marine-based structures are required to operate maximally for a long period of time, a lot of strategies are being experimented to prolong the service
* Innocent O. Arukalam [email protected]; [email protected] * Ying Li [email protected] 1
Shenyang National Laboratory for Materials Science, Corrosion and Protection Division, Institute of Metal Research, Chinese Academy of Science, 62 Wencui Road, Shenyang 110016, People’s Republic of China
2
Department of Polymer and Textile Engineering, Federal University of Technology, P.M.B. 1526 Owerri, Nigeria
3
Advanced Functional Materials/Corrosion Research Group, Africa Centre of Excellence in Future Energies and Electrochemical Systems (ACE‑FUELS), Federal University of Technology Owerri (FUTO), Owerri, Nigeria
4
School of Materials Science and Engineering, Northeastern University, Shenyang 110819, People’s Republic of China
lifetime of these facilities. Among the strategies is the use of protective organic coatings which have been acknowledged to be one of the best strategies to achieve durability. However, some of the conventional coatings have shown to be inherently hydrophilic and thus possess less capability to resist adhesion of marine foulants (Sun et al. 2020; Wang et al. 2019). Even where some of the
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