In-situ Growth of Biocidal AgCl Crystals in the Top Layer of Asymmetric Polytriazole Membranes
AuthorsVillalobos, Luis Francisco
Nunes, Suzana Pereira
KAUST DepartmentPhysical Sciences and Engineering (PSE) Division
Chemical and Biological Engineering Program
Water Desalination and Reuse Research Center (WDRC)
Biological and Environmental Sciences and Engineering (BESE) Division
Environmental Science and Engineering Program
Advanced Membranes and Porous Materials Research Center
Advanced Membranes and Porous Materials Center (AMPMC)
Water Desalination & Reuse Research Cntr
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AbstractScalable 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 enough to tune the permeance, molecular weight cut-off (MWCO) and silver loading of the final membrane.
CitationIn-situ Growth of Biocidal AgCl Crystals in the Top Layer of Asymmetric Polytriazole Membranes 2016 RSC Adv.
SponsorsThis research was supported by King Abdullah University of Science and Technology (KAUST). The authors thank Mohamed Nejib Hedhili for his assistance with the XPS analysis and Maria Peredo Silva for the illustrations in Figure 1.
PublisherRoyal Society of Chemistry (RSC)