Preparation of Organic/Inorganic Membrane by PDMS Low-temperature Pyrolysis

doi:10.3724/SP.J.1077.2014.13198

Journal of Inorganic Materials ›› 2014, Vol. 29 ›› Issue (2): 137-142.DOI: 10.3724/SP.J.1077.2014.13198

• Research Paper • Previous Articles Next Articles

Preparation of Organic/Inorganic Membrane by PDMS Low-temperature Pyrolysis

YU Jiao-Zhu, LI Lin, JIN Xin, DING Ling-Hua, WANG Tong-Hua

(State Key Laboratory of Fine Chemicals, Carbon Research Laboratory, R&D Center of Membrane Science, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China)

Received:2013-04-08 Revised:2013-05-24 Published:2014-02-20 Online:2014-01-17
About author:YU Jiao-Zhu. E-mail:yujiaozhu_111@163.com
Supported by:
National Natural Science Foundation of China (20836006, 20976021, 21176036, 21276035); National High Technology Research and Development Program of China (863 Program) (2009AA03Z215, 2012AA03A611)

Abstract

Abstract: The organic/inorganic membranes were prepared via low-temperature pyrolysis of polymers. Firstly, polymeric membranes were prepared by dip-coating method using PDMS as the precursor and stainless steel as the support. Then they were pyrolyzed at 350–480℃ under inert atmosphere. The effects of preparation conditions on the gas separation performance of the organic/inorganic membranes were investigated. Chemical structure changes of PDMS in the pyrolysis process were studied by TG and FT-IR. The morphology of organic/inorganic membrane was characterized by SEM. The results showed that the organic/inorganic membranes with good gas separation performance could be successfully prepared by low-temperature pyrolysis of PDMS. The membrane retains part flexibility of PDMS, and presents good thermostability and high gas permselectivity. The gas separation performance and membrane layer structure of organic/inorganic membranes are greatly affected by the preparation conditions such as the PDMS concentration, coating times, pyrolysis temperature and properties of support. The gas separation performances prepared under the optimum condition are that the O₂ permeation flux of 21.2 GPU(1 GPU=7.501×10^-12m³(STP)/(m²?s?Pa)) and O₂/N₂selectivity of 2.28.

Key words: low-temperature pyrolysis, polydimethylsiloxane, organic/inorganic membrane, gas separation

CLC Number:

TQ174

YU Jiao-Zhu, LI Lin, JIN Xin, DING Ling-Hua, WANG Tong-Hua. Preparation of Organic/Inorganic Membrane by PDMS Low-temperature Pyrolysis[J]. Journal of Inorganic Materials, 2014, 29(2): 137-142.

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Preparation of Organic/Inorganic Membrane by PDMS Low-temperature Pyrolysis

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