Partially Carbonized Polyimide Membranes with High Permeability for Air Separation.
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- Nishiyama Norikazu
- Division of Chemical Engineering, Graduate School of Engineering Science, Osaka University
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- Momose Wataru
- Division of Chemical Engineering, Graduate School of Engineering Science, Osaka University
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- Egashira Yasuyuki
- Division of Chemical Engineering, Graduate School of Engineering Science, Osaka University
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- Ueyama Korekazu
- Division of Chemical Engineering, Graduate School of Engineering Science, Osaka University
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Partially carbonized polyimide (CPI) membranes were prepared from a solution of 30 wt% polyamic acid in N, N-dimethylacetamide. The polymer membranes formed on an alumina support were thermally treated, involving imidization in air at 180°C and carbonization in N2 at relatively low temperature (400–500°C). The cross-sectional views of the supported CPI membranes show that the membranes consist of a top layer (thickness, 10 μm) on the support and a CPI/alumina thin layer in the support. The CPI membranes carbonized at 500°C showed high permeability for O2 of 1000–30000 barrer and permselectivity for O2/N2 of 3–6. The permeability of the CPI membranes was much higher than that of the reported polymer membranes and the carbon membranes. The pores formed under carbonization at 500°C and 400°C were effective for separating O2/N2 and CO2/CH4 mixtures, respectively. TG analysis indicated that the carbonization proceeds even at a constant temperature of 500°C. The successive generation of flexible pores before the formation of graphite structure with rigid pores seems to contribute to the higher permeability of the CPI membranes.
収録刊行物
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- JOURNAL OF CHEMICAL ENGINEERING OF JAPAN
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JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 36 (5), 603-608, 2003
公益社団法人 化学工学会
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詳細情報 詳細情報について
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- CRID
- 1390001204568658048
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- NII論文ID
- 10013413327
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- NII書誌ID
- AA00709658
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- COI
- 1:CAS:528:DC%2BD3sXkt1Kru7Y%3D
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- ISSN
- 18811299
- 00219592
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- NDL書誌ID
- 6534631
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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- 使用不可