Synthesis, Characterization and Gas Separation Properties of Polyimides Containing Fluorene Units
- 10.2991/icadme-15.2015.14How to use a DOI?
- Polyimide; Flourene; Gas separation properties; Solubility; Structure and properties
The six kinds of polyimides(PIs) containing fluorene units were prepared from 9,9 -bis(4-aminophenyl)fluorene(BAF) with various dianhydrides including 2,2 -bis-(3,4-dicarboxyphenyl)hexafluoropropane dianhydride(6FDA), 3,3',4,4'-biphenyltetracarboxylic dianhydride(BPDA), 4,4'-oxydiphthalic anhydride(ODPA), 3,3',4,4'-biphenyltetracarboxylic dianhydride(BTDA), pyromellitic dianhydride(PMDA) and 1,2,3,4-cyclobutanetetracarboxylic dianhydride(CBDA) via chemical imidization. Wide-angle X-ray diffractograms revealed that the polymers were amorphous. Most of the polyimides exhibited good solubility and could be readily dissolved in various solvents such as N-Methyl-2-pyrrolidone(NMP), N,N-dimethylacetamide(DMAc), N,N-dimethylformamide(DMF), and so on. The polyimide was thermally treated at 300 , 420 and 550 for further carbonization. Gas permeation properties for O2 and N2 of the PI-BPDA and PI-CBDA membranes were investigated. The permeability coefficients and selectivity for O2 and N2 of polyimide were obtained. With the increase of thermal treatment temperature, the permeability for O2 and N2 of polyimides increased, but the selectivity decreased. The gas separation mechanism for O2 and N2 was mainly molecular sieving.
- © 2015, the Authors. Published by Atlantis Press.
- Open Access
- This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).
Cite this article
TY - CONF AU - Yunhua Lu AU - Mingyue Fei AU - Xin Jin AU - Guoyong Xiao AU - Zhizhi Hu AU - Tonghua Wang PY - 2015/10 DA - 2015/10 TI - Synthesis, Characterization and Gas Separation Properties of Polyimides Containing Fluorene Units BT - Proceedings of the 5th International Conference on Advanced Design and Manufacturing Engineering PB - Atlantis Press SP - 62 EP - 67 SN - 2352-5401 UR - https://doi.org/10.2991/icadme-15.2015.14 DO - 10.2991/icadme-15.2015.14 ID - Lu2015/10 ER -