In situ growth of biocidal AgCl crystals in the top layer of asymmetric polytriazole membranes

L.F. Villalobos, S. Chisca, H. Cheng, P.-Y.Hong, S.P. Nunes, K.-V. Peinemann
RSC Advances, Volume 6, Issue 52, pp. 46696-46701, (2016)

In situ growth of biocidal AgCl crystals in the top layer of asymmetric polytriazole membranes

Keywords

Silver, Silver halides, Commercial membranes, Fabrication strategies, In-situ growth, Molecular weight cutoff, Polytriazole, Silver chlorides, Silver concentration, Silver loading

Abstract

​Scalable fabrication strategies to concentrate biocidal materials in only the surface of membranes are highly desirable. In this letter, tight-UF polytriazole membranes with a high concentration of biocide silver chloride (AgCl) crystals dispersed in only their top layer are presented. They were made following a simple dual-bath process that is compatible with current commercial membrane casting facilities. These membranes can achieve a 150-fold increase in their antimicrobial character compared to their silver-free counterpart. Moreover, fine-tuning of their properties is straightforward. A change in the silver concentration in one of the baths is sufficient to tune the permeance, molecular weight cut-off (MWCO) and silver loading of the final membrane.

Code

DOI: 10.1039/C6RA08090A

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