Antibacterial characteristics of electroless plating Ni-P-TiO₂ coatings

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• 作者：Qi Zhao^a ; ^{Q.Zhao@dundee.ac.uk} ; Chen Liu^a ; Xueju Su^a ; Shuai Zhang^a ; Wei Song^a ; Su Wang^a ; Guiling Ning^b ; ^{ninggl@dlut.edu.cn} ; Junwei Ye^b ; Yuan Lin^b ; Weitao Gong^b
• 关键词：Ni&ndash ; P&ndash ; TiO2 ; Nano-composite coatings ; Surface energy ; Bacterial adhesion
• 刊名：Applied Surface Science
• 出版年：2013
• 出版时间：1 June, 2013
• 年：2013
• 卷：274
• 期：Complete
• 页码：101-104
• 全文大小：568 K

文摘

Electroless Ni-P coatings have been widely used in the chemical, mechanical and electronic industries due to their excellent corrosion and wear resistance. Many studies reported that the incorporation of nano-sized particles TiO₂ into Ni-P matrix greatly improved their anti-corrosion and anti-wear resistance. However no studies have been reported on their anti-bacterial property. In this paper, the Ni-P-TiO₂ nano-composite coatings were prepared on stainless steel 316L using electroless plating technique. The experimental results showed that the Ni-P-TiO₂ coatings reduced the adhesion of three bacterial strains (Pseudomonas fluorescens, Cobetia and Vibrio) by up to 75 % and 70 % respectively, as compared with stainless steel and Ni-P coatings. The electron donor surface energy of the Ni-P-TiO₂ coatings increased significantly with increasing TiO₂ content after UV irradiation. The number of adhered bacteria decreased with increasing electron donor surface energy of the coatings.