Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
11026962 | Applied Surface Science | 2019 | 22 Pages |
Abstract
In this work, a multilayer antibacterial and antifungal superhydrophilic film was prepared on the 316L stainless steel surface by mussel-inspired depositions of polydopamine (PDA) and silver nanoparticles (Ag NPs) followed by modification with methoxy-polyethylene-glycol thiol (mPEG-SH, MW5000). The results of the scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) indicated that the critical hierarchical micro/nanostructures were mainly constructed by the combination of PDA and Ag NPs. After modified with mPEG-SH, the resulting surface showed excellent superhydrophilicity with a water contact angle of 0°. Further, the as-prepared superhydrophilic surfaces exhibited enhanced and more durable antibacterial performances against the Gram-negative Escherichia coli and the Gram-positive Staphylococcus aureus under immersed environments. More importantly, the superhydrophilic surfaces also showed excellent antifungal activities against the fungi Penicillium F2-1 under atmospheric environments. The enhanced antimicrobial properties were resulted from the synergistic effects of anti-adhesion property of absorbed water layers, bactericidal property of Ag NPs and stereo hindrance effect of mPEG-SH molecular chains.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
Hongchang Qian, Jingzhi Yang, Yuntian Lou, Obaid ur Rahman, Ziyu Li, Xuan Ding, Jin Gao, Cuiwei Du, Dawei Zhang,