PDMS低温热解制备有机/无机膜的研究

doi:10.3724/SP.J.1077.2014.13198

无机材料学报 ›› 2014, Vol. 29 ›› Issue (2): 137-142.DOI: 10.3724/SP.J.1077.2014.13198 CSTR: 32189.14.SP.J.1077.2014.13198

PDMS低温热解制备有机/无机膜的研究

郁蕉竹, 李琳, 金鑫, 丁玲华, 王同华

(大连理工大学化工学院, 精细化工国家重点实验室, 炭素材料研究室, 大连 116024)

收稿日期:2013-04-08 修回日期:2013-05-24 出版日期:2014-02-20 网络出版日期:2014-01-17
作者简介:郁蕉竹(1989–), 女, 硕士研究生. E-mail:yujiaozhu_111@163.com
基金资助:
国家自然科学基金(20836006, 20976021, 21176036, 21276035); 国家 863 项目(2009AA03Z215, 2012AA03A611)

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)

摘要/Abstract

摘要： 以聚二甲基硅氧烷(PDMS)为前驱体聚合物, 采用浸渍法在支撑体上涂覆制备PDMS支撑膜, 将其在惰性气氛下350~480℃低温热解, 制备有机/无机膜。考察了制膜工艺条件对膜气体分离性能的影响; 并借助于TG和FT-IR测试手段探讨了PDMS 的热解过程及化学结构的变化; 采用SEM对有机/无机膜的微观形貌进行表征。研究表明, 采用低温热解法可以成功制备出气体分离性能良好的有机/无机膜。该膜既保留了有机膜的柔韧性, 又具有无机膜的热稳定性好的优点, 并表现出良好的气体渗透性能和选择性。PDMS制膜液的浓度、浸渍次数、复合膜的热解温度及基体孔径和性质等因素对有机/无机膜的气体分离性能以及膜层结构有较大的影响。在最佳工艺条件下制备的有机/无机膜其O₂渗透通量为21.2 GPU(1 GPU=7.501×10^-12 m³(STP)/(m²?s?Pa)), O₂/N₂分离系数为2.28。

关键词: 低温热解, 聚二甲基硅氧烷, 有机/无机膜, 气体分离

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

中图分类号:

TQ174

郁蕉竹, 李琳, 金鑫, 丁玲华, 王同华. PDMS低温热解制备有机/无机膜的研究[J]. 无机材料学报, 2014, 29(2): 137-142.

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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PDMS低温热解制备有机/无机膜的研究

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

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