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    Title: Choice of Apposite Dispersing Medium for Silica Nanoparticles Leading to Their Effective Embedment in Nanocomposite Nanofiltration Membranes
    Authors: De Guzman, Manuel Reyes
    Ang, Micah Belle Marie Yap
    Lai, Cheng-Lee
    Trilles, Calvin A.
    Pereira, John Marseline
    Aquino, Ruth R.
    Huang, Shu-Hsien
    Cheng-Lee Lai(賴振立)
    Contributors: Sichuan Univ Sci & Engn, Coll Mat Sci & Engn, Mat Corros & Protect Key Lab Sichuan Prov
    Chung Yuan Christian Univ, R&D Ctr Membrane Technol
    Chung Yuan Christian Univ, Dept Chem Engn
    Chia Nan Univ Pharm & Sci, Dept Environm Engn & Sci
    Mapua Univ, Sch Chem Biol & Mat Engn & Sci
    Natl Ilan Univ, Dept Chem & Mat Engn
    Date: 2019-09
    Issue Date: 2020-07-29 13:54:51 (UTC+8)
    Publisher: AMER CHEMICAL SOC
    Abstract: Thin-film nanocomposite (TFN) membranes enjoy advantages over the traditional membranes for water purification purposes. TFN membranes are fabricated primarily through interfacial polymerization: diamines are reacted with acyl chlorides. Nanoparticles are added either to aqueous or organic solutions. A polyamide layer forms at the interface of two immiscible phases. In this present study, silica nanoparticles were dispersed in water or n-hexane medium. Scanning electron microscopy-energy dispersive X-ray spectroscopy revealed that dispersing the nanoparticles in n-hexane led to the embedment of more silica in the polyamide layer. A cross-flow nanofiltration setup was used to evaluate the membrane performance, with pure water and different feed salt solutions as feed. The results demonstrated that dispersing the nanoparticles in water led to the formation of a defective polyamide layer. However, dispersion in n-hexane resulted in a TFN membrane with a high separation performance. Moreover, the membrane exhibited stability for 62 h.
    Relation: Industrial & Engineering Chemistry Research, v.58, n.38, pp.17937-17944
    Appears in Collections:[Dept. of Environmental Engineering and Science (including master's program)] Periodical Articles

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