Structure and pervaporation performance of novel quaternized poly(vinyl alcohol)/γ-aminopropyltriethoxysilane hybrid membranes

Authors

  • Qiu Gen Zhang,

    1. National Engineering Laboratory for Green Chemical Production of Alcohols, Ethers, and Esters, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, People's Republic of China
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  • Qing Lin Liu,

    Corresponding author
    1. National Engineering Laboratory for Green Chemical Production of Alcohols, Ethers, and Esters, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, People's Republic of China
    • National Engineering Laboratory for Green Chemical Production of Alcohols, Ethers, and Esters, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, People's Republic of China
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  • Xiao Juan Meng,

    1. National Engineering Laboratory for Green Chemical Production of Alcohols, Ethers, and Esters, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, People's Republic of China
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  • Ian Broadwell

    1. National Engineering Laboratory for Green Chemical Production of Alcohols, Ethers, and Esters, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, People's Republic of China
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Abstract

Novel hybrid organic–inorganic membranes were prepared via sol–gel reactions of quaternized poly(vinyl alcohol) (q-PVA) and γ-aminopropyltriethoxysilane (APTEOS) for pervaporation dehydration of an 85 wt % ethanol solution. The physicochemical structure of the hybrid membranes was characterized by FTIR, XRD, SEM, TG, and TEM. Nanofractal objects originated from self-assembly of ammonium groups on the q-PVA chains and amino groups in APTEOS can be observed on the surface of the hybrid membranes. When APTEOS/PVA ratio is 5% (wt/wt), the hybrid membrane has specific nervate networks on its surface and exhibits the highest separation factor. The hybrid membranes have better pervaporation performance than pristine q-PVA membrane, and their permeation flux was found to increase linearly with increasing APTEOS content. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010

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