TY - JOUR
T1 - Immobilization of silver nanoparticle-decorated silica particles on polyamide thin film composite membranes for antibacterial properties
AU - Park, Sang Hee
AU - Ko, Young Seon
AU - Park, Sung Joon
AU - Lee, Jong Suk
AU - Cho, Jinhan
AU - Baek, Kyung Youl
AU - Kim, Il Tae
AU - Woo, Kyoungja
AU - Lee, Jung Hyun
N1 - Funding Information:
This research was supported by Basic Science Research Program ( NRF-2014R1A1A1003197 ) and the Future-based Technology Development Program (Grant no. 2014-060222 ) through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning and the Korea Research Institute of Chemical Technology (KRICT) institutional program (Project no. KK 1502-C00 ). We are also grateful to Taek-Seung Kim and Prof. Hee-Deung Park for help to acquire CLSM images.
Publisher Copyright:
© 2015 Elsevier B.V.
Copyright:
Copyright 2015 Elsevier B.V., All rights reserved.
PY - 2016/2/1
Y1 - 2016/2/1
N2 - We present a new strategy to strongly and effectively immobilize silver nanoparticles (AgNPs) on polyamide thin film composite membranes to endow antibacterial activity. This method relies on the immobilization of relatively large silica particles (SiO2, ~400nm in diameter), where AgNPs of ~30nm in diameter are tightly and densely bound (AgNP@SiO2), on the membrane surface using cysteamine as a covalent linker. The formation of multiple Ag-S chemical bonds between a "bumpy AgNP@SiO2 and the rough membrane surface provides a great leaching stability of AgNPs and AgNP@SiO2. AgNP@SiO2 particles were well distributed over the entire membrane surface without severe aggregation. The surface coverage of the membrane by AgNP@SiO2 was tuned by adjusting the deposition time and AgNP@SiO2 particle concentration. The AgNP@SiO2-immobilized membrane showed excellent antibacterial properties against Escherichia coli, Pseudomonas aeruginosa and Staphylococcus aureus, even with a relatively low particle coverage. Importantly, the separation performance (water flux and salt rejection) of the membrane was not impaired by particle immobilization. These beneficial effects are attributed mainly to the sparse and good distribution of AgNP@SiO2, which can reinforce the antibacterial activity of AgNPs while having a negligible impact on the hydraulic resistance.
AB - We present a new strategy to strongly and effectively immobilize silver nanoparticles (AgNPs) on polyamide thin film composite membranes to endow antibacterial activity. This method relies on the immobilization of relatively large silica particles (SiO2, ~400nm in diameter), where AgNPs of ~30nm in diameter are tightly and densely bound (AgNP@SiO2), on the membrane surface using cysteamine as a covalent linker. The formation of multiple Ag-S chemical bonds between a "bumpy AgNP@SiO2 and the rough membrane surface provides a great leaching stability of AgNPs and AgNP@SiO2. AgNP@SiO2 particles were well distributed over the entire membrane surface without severe aggregation. The surface coverage of the membrane by AgNP@SiO2 was tuned by adjusting the deposition time and AgNP@SiO2 particle concentration. The AgNP@SiO2-immobilized membrane showed excellent antibacterial properties against Escherichia coli, Pseudomonas aeruginosa and Staphylococcus aureus, even with a relatively low particle coverage. Importantly, the separation performance (water flux and salt rejection) of the membrane was not impaired by particle immobilization. These beneficial effects are attributed mainly to the sparse and good distribution of AgNP@SiO2, which can reinforce the antibacterial activity of AgNPs while having a negligible impact on the hydraulic resistance.
KW - Antibacterial property
KW - Particle immobilization
KW - Polyamide thin film composite membrane
KW - Reverse osmosis
KW - Silver nanoparticle
UR - http://www.scopus.com/inward/record.url?scp=84946426770&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84946426770&partnerID=8YFLogxK
U2 - 10.1016/j.memsci.2015.09.060
DO - 10.1016/j.memsci.2015.09.060
M3 - Article
AN - SCOPUS:84946426770
VL - 499
SP - 80
EP - 91
JO - Jornal of Membrane Science
JF - Jornal of Membrane Science
SN - 0376-7388
ER -