Journal
JOURNAL OF MEMBRANE SCIENCE
Volume 444, Issue -, Pages 318-326Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.memsci.2013.05.024
Keywords
Ultrafiltration membrane; Polysulfone; PVP-g-silica nanoparticles; Hydrophilicity; Fouling resistance
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Funding
- National Research Foundation of Korea (NRF)
- Ministry of Education, Science and Technology [2012R1A1A2002945]
- National Research Foundation of Korea [2012R1A1A2002945] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Membranes for ultrafiltration were prepared from polysulfone (PSf) composites with poly(1-vinylpyrrolidone) grafted silica nanoparticles (PVP-g-silica). For the synthesis of PVP-g-silica, hydroxyl terminated silica nanoparticles were reacted with (3-methacryloxypropyl)trimethoxysilane (gamma-MPS) to form gamma-MPS terminated silica nanoparticles (silica-MPS), which were further reacted with VP monomer. Formation of PVP-g-silica was confirmed by FT-IR, XPS, TGA, FE-SEM, and HR-TEM. PSf/PVP-g-silica membranes exhibited higher water flux than PSf membranes without any loss in solute rejection for membranes containing less than or equal to 5 wt% of PVP-g-silica. The water flux of a membrane containing 1 wt% PVP-g-silica was 2.3 times higher than that of PSf membrane. The hydrophilicity of the PSf/PVP-g-silica membrane also increased with increasing PVP-g-silica content. The hydrophilicity of the PSf/PVP membrane decreased with increasing retention time in a water bath, while the hydrophilicity of the PSf/PVP-g-silica membrane did not change with retention time. PSf/PVP-g-silica membranes exhibited enhanced fouling resistance in fouling experiments using nonionic surfactants. (C) 2013 Elsevier B.V. All rights reserved.
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