张守海

个人信息Personal Information

教授

博士生导师

硕士生导师

性别:男

毕业院校:大连理工大学

学位:博士

所在单位:化工学院

学科:高分子材料. 高分子化学与物理. 膜科学与技术

联系方式:0411-84986107

电子邮箱:zhangshh@dlut.edu.cn

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Effects of sulfone/ketone in poly(phthalazinone ether sulfone ketone) on the gas permeation of their derived carbon membranes

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论文类型:期刊论文

发表时间:2009-03-20

发表刊物:JOURNAL OF MEMBRANE SCIENCE

收录刊物:SCIE、EI

卷号:330

期号:1-2

页面范围:319-325

ISSN号:0376-7388

关键字:Molecular sieving; Microporous carbon; Stabilization; Pyrolysis; Gas separation

摘要:A series of copolymer, poly(phthalazinone ether sulfone ketone)s (PPESKs) with the sulfone over ketone unit (S/K) ratio varying from 20/80, 50/50 to 80/20, were used as precursors to prepare carbon membranes. The effects of chemical structure as S/K ratio of PPESKs on the microstructure and gas separation performance of their derived carbon membranes were mainly investigated. The properties of PPESKs were detected in terms of density, fractional free volume, char yield, interlayer distance and glass transition temperature. During the formation process of carbon membranes (i.e., stabilization and pyrolysis), the changes in functional groups, microstructural parameters and gas permeation were monitored by FTIR, X-ray diffraction, TEM and single gas permeation techniques. The results have shown that the microstructure and gas permeation of obtained carbon membranes are significantly affected by the S/K ratio in precursor PPESKs. Carbon membranes exhibit higher selectivity and lower permeability when prepared at low pyrolytic temperature (i.e., 650 degrees C and 800 degrees C) and from PPESKs with S/K ratio equaling 50/50, followed with 20/80 and 80/20. As for carbon membranes prepared at high pyrolytic temperature (i.e., 950 degrees C), the selectivity order of them is well in accordance with S/K mole ratio in precursor PPESKs: 20/80>50/50>80/20, and vice versa for permeability. (C) 2009 Elsevier B.V. All rights reserved.