Volume 43, Issue 3 pp. 574-581
Research Article

Poly(vinyl alcohol)/Carboxyl Graphene Membranes for Ethanol Dehydration by Pervaporation

Guanglu Han

Corresponding Author

Guanglu Han

Zhengzhou University of Light Industry, School of Material and Chemical Engineering, Kexue Avenue, 450001 Zhengzhou, China

Correspondence: Guanglu Han ([email protected]), Yonghui Zhang ([email protected]), Zhengzhou University of Light Industry, School of Material and Chemical Engineering, Kexue Avenue, Zhengzhou 450001, China.Search for more papers by this author
Zhe Chen

Zhe Chen

Zhengzhou University of Light Industry, School of Material and Chemical Engineering, Kexue Avenue, 450001 Zhengzhou, China

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Lifang Cai

Lifang Cai

Zhengzhou University of Light Industry, School of Material and Chemical Engineering, Kexue Avenue, 450001 Zhengzhou, China

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Yonghui Zhang

Corresponding Author

Yonghui Zhang

Zhengzhou University of Light Industry, School of Material and Chemical Engineering, Kexue Avenue, 450001 Zhengzhou, China

Correspondence: Guanglu Han ([email protected]), Yonghui Zhang ([email protected]), Zhengzhou University of Light Industry, School of Material and Chemical Engineering, Kexue Avenue, Zhengzhou 450001, China.Search for more papers by this author
Junfeng Tian

Junfeng Tian

Zhengzhou University of Light Industry, School of Material and Chemical Engineering, Kexue Avenue, 450001 Zhengzhou, China

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Huanhuan Ma

Huanhuan Ma

Zhengzhou University of Light Industry, School of Material and Chemical Engineering, Kexue Avenue, 450001 Zhengzhou, China

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Shaoming Fang

Shaoming Fang

Zhengzhou University of Light Industry, School of Material and Chemical Engineering, Kexue Avenue, 450001 Zhengzhou, China

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First published: 13 January 2020
Citations: 14

Abstract

Carboxyl graphene (CG) with two functions of hybridization and crosslinking was incorporated into poly(vinyl alcohol) (PVA) matrix to form PVA/CG mixed-matrix membranes (MMMs). The membranes demonstrated excellent mechanical properties and thermal stability. The improved hydrophilicity and formed crosslinking structure led to moderate swelling. The membrane crystallinity decreased and the free volume was promoted with increasing CG loading amount. The pervaporation (PV) separation performance for ethanol dehydration indicated that both permeation flux and separation factor were enhanced simultaneously at the optimum CG loading. Subsequently, the permeation flux continued to increase while the separation factor declined at higher CG loadings.

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