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    Amphiphilic Block Copolymer of Poly(dimethylsiloxane) and Methoxypolyethylene Glycols for High-Permeable Polysulfone Membrane Preparation

    Year: 2019

    Journal: ACS Omega, Volume 4, AUG, page 13052–13060

    Authors: Zhang, Lei; Zhou, Jin; Sun, Fei; Yu, Hai-Yin; Gu, Jia-Shan

    Organizations: National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [21371008]

    Poly(dimethylsiloxane)-block-methoxypolyethylene glycols (PDMS-b-mPEG) were synthesized by Steglich esterification. The high-permeable membrane (PSf/ PDMS-b-mPEG) was prepared by using PDMS-b-mPEG as additives. The successful synthesis of PDMS-b-mPEG was confirmed by nuclear magnetic resonance. Field emission scanning electron microscopy images show that the distribution of finger-like macroporous and sponge-like macroporous can be modulated by controlling the ratio of the hydrophilic/ hydrophobic components of additives. The distribution of additives and membrane wettability are validated with X-ray photoelectron spectroscopy and water contact angle test. The permeability of the blended membrane, especially for the membrane PSf/PDMSb- mPEG1900 (M3), was remarkably improved. The water permeability of M3 (239.4 L/ m2.h.bar) was 6.6 times that of the unblended membrane M0 (42.5 L/m(2).h.bar). The findings of protein BSA filtration show that the flux recovery ratio of M3 is 89.2% at a BSA retention rate of about 80%, which demonstrates that the polysulfone membranes blended with PDMS-b-mPEG have excellent antifouling performance and extraordinary permeability.
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