Journal
JOURNAL OF MEMBRANE SCIENCE
Volume 504, Issue -, Pages 55-65Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.memsci.2015.12.057
Keywords
Troger's Base (TB); Polyimides; Gas separation; High-strength; Membranes
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Funding
- Korea-Italy Cooperation Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT & Future Planning
- Hunan Provincial Natural Science Foundation of China [14JJ2126]
- Scientific Research Fund of Hunan Provincial Education Department [13C618]
- Tianjin University
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Three soluble and processable polyimides (PIs) were prepared in high yield from imide-containing diamines via Troger's Base (TB) polymerization reactions using dimethoxymethane (DMM). The three novel imide-containing diamines were easily synthesized from a commercial diamine precursor, 2,6-diaminotoluene and three commercially available dianhydrides. The corresponding membranes had fractional free volume (FFV) values in the range of 0.170-0.200, good mechanical, thermal and gas transport properties, which were correlated with the polymer chain structures. The incorporation of TB units into the PI backbone improved the gas transport performance. The TB-based polyimide membrane from BTDA had a CO2 permeability of 19.6 Barrer, an elongation at break of 9.0%, and a tensile strength of 114.2 MPa, suggesting better properties as gas separation membranes than Matrimid (R) polyimide from the same BTDA. (C) 2016 Elsevier B.V. All rights reserved.
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