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

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 F...

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Bibliographic Details
Published in:Journal of applied polymer science 2010-10, Vol.118 (2), p.1121-1126
Main Authors: Zhang, Qiu Gen, Liu, Qing Lin, Meng, Xiao Juan, Broadwell, Ian
Format: Article
Language:English
Subjects:
Applied sciences
Composites
Exact sciences and technology
Exchange resins and membranes
Forms of application and semi-finished materials
hybrid membranes
pervaporation
Polymer industry, paints, wood
self-assembly
Technology of polymers
γ-aminopropyltriethoxysilane
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Summary: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.
ISSN:0021-8995
1097-4628
DOI:10.1002/app.32504