Nanocomposite membranes containing positively polarized gold nanoparticles for facilitated olefin transport |
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| Authors: | Sang Wook Kang Jinkee Hong Jong Hyuk Park Sung Hyun Mun Jong Hak Kim Jinhan Cho Kookheon Char Yong Soo Kang |
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| Institution: | 1. School of Chemical & Biological Engineering and NANO Systems Institute-National Core Research Center, Seoul National University, Seoul 151-744, South Korea;2. Hybrid Materials Research Center, Korea Institute of Science & Technology, Seoul 136-791, South Korea;3. Department of Chemical Engineering, Hanyang University, Seungdong-ku, Seoul 133-791, South Korea;4. Department of Chemical Engineering, Yonsei University, Seoul 120-749, South Korea;5. School of Advanced Materials Engineering, Kookmin University, Seoul 136-702, South Korea |
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| Abstract: | Positively polarized gold nanoparticles have been demonstrated for use as stable olefin carriers for facilitated olefin transport membranes. The formation and size of gold nanoparticles stabilized by 4-dimethylaminopyridine (DMAP) were monitored using X-ray diffraction (XRD), transmission electron microscopy (TEM) and UV–visible spectroscopy. Nanocomposite membranes that deliver high separation performance for olefin/paraffin mixtures were prepared by dispersing gold nanoparticles stabilized by DMAP in a polymer matrix, poly(vinyl pyrrolidone) (PVP). X-ray photoelectron spectroscopy (XPS) and zeta potential measurements revealed that gold nanoparticles stabilized by DMAP exhibited a high positive polarity, which is responsible for the reversible interaction between the gold nanoparticles and olefin molecules. Compared to neat PVP membranes, the composite membranes consisting of PVP and the polarized gold nanoparticles showed stable and enhanced separation of olefin/paraffin mixtures. |
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| Keywords: | Au nanoparticle Membrane Facilitated transport Olefin |
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