Journal
DESALINATION
Volume 219, Issue 1-3, Pages 48-56Publisher
ELSEVIER
DOI: 10.1016/j.desal.2007.06.003
Keywords
TiO2; interfacial polymerization; nanocomposite; nanofiltration
Categories
Funding
- National Research Foundation of Korea [과C6A1905, 2005-005-J01401] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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We report on novel polyamide (PA) nanocomposite membranes containing high loading of TiO2 nanoparticles synthesized via in-situ interfacial polymerization. Interfacial reaction occurred from the aqueous phase of m-phenyl diamine (MPD) and the organic phase of trimesoyl chloride (TMC) in which TiO2 nanoparticles were homogeneously dispersed. This new method provides higher loading (similar to 5 w%) of TiO2 nanoparticles in the membranes and more robust structure of PA-TiO2 nanocomposite membranes. The in-situ polymerization and the incorporation of TiO2 nanoparticles were confirmed by field emission scanning electron microscope (FESEM), x-ray diffraction analyzer (XRD), x-ray photoelectron spectroscopy (XPS), and FT-IR spectroscopy. In addition, the effects of different preparation conditions such as curing temperature and curing time on membrane performance were investigated. The nanocomposite membrane, which was cured at 70 degrees C for 5 min, exhibited the high and stable rejection value of more than 95% with respect to MgSO4 and the penneation flux of 9.1 L/m(2)h. Elemental analysis by XPS demonstrated that substantial amounts of TiO2 nanoparticles remained on the surface of the membranes after nanofiltration operation for 2 days.
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