Silver-enhanced block copolymer membranes with biocidal activity

Poornima Madhavan, Pei-Ying Hong, Rachid Sougrat, Suzana Pereira Nunes

Research output: Contribution to journalArticlepeer-review

47 Scopus citations

Abstract

Silver nanoparticles were deposited on the surface and pore walls of block copolymer membranes with highly ordered pore structure. Pyridine blocks constitute the pore surfaces, complexing silver ions and promoting a homogeneous distribution. Nanoparticles were then formed by reduction with sodium borohydride. The morphology varied with the preparation conditions (pH and silver ion concentration), as confirmed by field emission scanning and transmission electron microscopy. Silver has a strong biocide activity, which for membranes can bring the advantage of minimizing the growth of bacteria and formation of biofilm. The membranes with nanoparticles prepared under different pH values and ion concentrations were incubated with Pseudomonas aeruginosa and compared with the control. The strongest biocidal activity was achieved with membranes containing membranes prepared under pH 9. Under these conditions, the best distribution with small particle size was observed by microscopy.
Original languageEnglish (US)
Pages (from-to)18497-18501
Number of pages5
JournalACS Applied Materials & Interfaces
Volume6
Issue number21
DOIs
StatePublished - Oct 15 2014

ASJC Scopus subject areas

  • Materials Science(all)

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