Thickness Effect on Permeance of CO2/CH4 Gases in CA Coated PVDF Composite Membranes

IF 1.5 4区材料科学 Q3 MATERIALS SCIENCE, CERAMICS

Transactions of the Indian Ceramic Society Pub Date : 2021-04-03 DOI:10.1080/0371750X.2021.1880969

Ayesha Raza, Muhammad Fahad Yousaf, S. Farrukh, A. Hussain

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引用次数: 1

Abstract

The aim of this work is to study the effect of membrane thickness with respect to gas permeance and tensile strength. The influence of membrane thickness on gas permeation has received little attention to date. Single layer flat sheet membrane with average thickness of 25 μm and dual layer composite membranes with variable thickness of skin layer were fabricated by coating CA/ PEG selective layer on the polyvinylidene fluoride porous support. Permeation experiments were performed with CO2 and CH4 which revealed that permeance of CO2 was pronounced compared to CH4. Highest permeance of 0.87 gas permeation unit (GPU) was obtained at 4 bar with 19.4 μm skin layer. Fourier transform infra-red spectroscopy was used to study the existence of different functional groups in the membranes. Strength of the membranes was analyzed using tensile testing machine. Scanning electron microscopy was used to study the surface structure and morphology. It was found that by reducing the membrane thickness, the permeance of CO2 and CH4 increased without compromising on membrane strength. GRAPHICAL ABSTRACT

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厚度对CO2/CH4气体在CA涂层PVDF复合膜中渗透性的影响

本工作的目的是研究膜厚度对透气性和抗拉强度的影响。到目前为止，膜厚度对气体渗透的影响很少受到关注。通过在聚偏二氟乙烯多孔载体上涂覆CA/PEG选择层，制备了平均厚度为25μm的单层平板膜和变表皮厚度的双层复合膜。用CO2和CH4进行渗透实验，结果表明与CH4相比，CO2的渗透性显著。0.87气体渗透单元（GPU）的最高渗透率在4巴下获得，表皮层为19.4μm。傅立叶变换红外光谱用于研究膜中不同官能团的存在。使用拉伸试验机对膜的强度进行了分析。采用扫描电子显微镜对其表面结构和形貌进行了研究。研究发现，通过减小膜厚度，CO2和CH4的渗透率增加，而不影响膜强度。图形摘要

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来源期刊

Transactions of the Indian Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

2.40

自引率

8.30%

发文量

审稿时长

2.3 months

期刊介绍： Transactions of the Indian Ceramic Society is a quarterly Journal devoted to current scientific research, technology and industry-related news on glass and ceramics. The Journal covers subjects such as the chemical, mechanical, optical, electronic and spectroscopic properties of glass and ceramics, and characterization of materials belonging to this family. The Editor invites original research papers, topical reviews, opinions and achievements, as well as industry profiles for publication. The contributions should be accompanied by abstracts, keywords and other details, as outlined in the Instructions for Authors section. News, views and other comments on activities of specific industries and organizations, and also analyses of industrial scenarios are also welcome.