In-situ Growth of Biocidal AgCl Crystals in the Top Layer of Asymmetric Polytriazole Membranes

Luis Francisco Villalobos, Stefan Chisca, Hong Cheng, Pei-Ying Hong, Suzana Pereira Nunes, Klaus-Viktor Peinemann

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


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 enough to tune the permeance, molecular weight cut-off (MWCO) and silver loading of the final membrane.
Original languageEnglish (US)
Pages (from-to)46696-46701
Number of pages6
JournalRSC Adv.
Issue number52
StatePublished - 2016

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: This 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.


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