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Effects of membrane-formation substrate on the structure and gas separation performance of carbon membranes
Authors: ZHANG Bing 1, Dang Xiaolong 1, WU Yonghong 1, YU Zhixue 1, WANG Tonghua 2
Units: 1. School of Petrochemical Engineering, Shenyang University of Technology, Liaoyang, Liaoning 111003, China;
KeyWords: Membrane-formation substrate; Carbon membranes; Porous structure; Permeation
ClassificationCode:TQ028.8
year,volume(issue):pagination: 2014,34(6):17-21

Abstract:
Carbon membranes were prepared using resorcinol-formaldehyde as precursor and F127 as additives, through the processes of membrane-forming and carbonization. The thermal stability of precursors and their formation of carbon structure were analyzed by thermogravimetry analysis, Infrared spectroscopy, elemental analysis and transmittance electron microscopy at microscale level. The carbon structure and porous structure of carbon membranes were also measured by X-ray diffraction and N2 adsorption technique. The surface hydrophobicity of membrane-formation substrate was correlated with the shrinkage during membrane formation, carbon structure, porous structure and gas separation performance of resultant carbon membranes. Results have shown that membrane-formation substrate definitely has great effect on the microstructure and separation performance of carbon membranes. Compared with polytetrafluoroethylene and stainless steel, glass plate with higher hydrophobicity is beneficial for deceasing radial shrinkage during membrane formation, resulting into larger specific surface area and pore volume in carbon membranes. A satisfactory O2/N2 selectivity is attained above 10 for carbon membranes formed on glass plate.

Funds:
国家自然科学基金(20906063),辽宁省自然科学基金(20102170),辽宁省高校优秀人才项目(LJQ20120101)和精细化工国家重点实验室开放课题(KF1107)。

AuthorIntro:
张兵(1977-),男,博士,副教授,主要从事炭膜制备及应用研究;

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