Plasma deposition of silver nanoparticles on ultrafiltration membranes: Antibacterial and anti-biofouling properties

被引:43
作者
Cecilia Cruz, Mercedes [1 ,2 ]
Ruano, Gustavo [3 ]
Wolf, Marcus [4 ]
Hecker, Dominic [4 ,5 ]
Castro Vidaurre, Elza [1 ,2 ]
Schmittgens, Ralph [4 ]
Beatriz Rajal, Veronica [1 ,2 ,6 ]
机构
[1] Univ Nacl Salta, Inst Invest Ind Quim, Consejo Nacl Invest Cient & Tecn, Salta Capital, Argentina
[2] Univ Nacl Salta, Fac Ingn, Salta Capital, Argentina
[3] CNEA, Ctr Atom Bariloche, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina
[4] Tech Univ Dresden, Inst Festkorperelekt, D-01062 Dresden, Germany
[5] Fraunhofer Inst Elektronenstrahl & Plasmatech, D-01277 Dresden, Germany
[6] Univ Calif Davis, Fogarty Int Ctr, Davis, CA 95616 USA
关键词
Ultrafiltration; Biofouling; Silver nanoparticles; Plasma; Gas flow sputtering; XPS; SURFACE MODIFICATION; POLYPROPYLENE MEMBRANE; STAPHYLOCOCCUS-AUREUS; ESCHERICHIA-COLI; WASTE-WATER; POLYETHERSULFONE; NANOFILTRATION; NANOMATERIALS; PERFORMANCE; POLYMERIZATION;
D O I
10.1016/j.cherd.2014.09.014
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
A novel and versatile plasma reactor was used to modify polyethersulphone commercial membranes. The equipment was applied to: (i) functionalize the membranes with low-temperature plasmas, (ii) deposit a film of poly(methyl methacrylate) (PMMA) by Plasma Enhanced Chemical Vapor Deposition (PECVD) and, (iii) deposit silver nanoparticles (SNP) by gas flow sputtering. Each modification process was performed in the same reactor consecutively, without exposure of the membranes to atmospheric air. Scanning electron microscopy and transmission electron microscopy were used to characterize the particles and modified membranes. SNP are evenly distributed on the membrane surface. Particle fixation and transport inside membranes were assessed before- and after-washing assays by X-ray photoelectron spectroscopy depth profiling analysis. PMMA addition improved SNP fixation. Plasma-treated membranes showed higher hydrophilicity. Anti-biofouling activity was successfully achieved against Gram-positive (Enterococcus faecalis) and -negative (Salmonella) Typhimurium bacteria. Therefore, disinfection by ultrafiltration showed substantial resistance to biofouling. The post-synthesis functionalization process developed provides a more efficient fabrication route for anti-biofouling and anti-bacterial membranes used in the water treatment field. To the best of our knowledge, this is the first report of a gas phase condensation process combined with a PECVD procedure in order to deposit SNP on commercial membranes to inhibit biofouling formation. (C) 2014 The Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
引用
收藏
页码:524 / 537
页数:14
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