New crosslinking method of polyamide–imide membranes for potential application in harsh polar aprotic solvents

► Crosslinking of polyamide–imide (Torlon®) based membranes using di-isocyanates. ► Crosslinked membranes are resistant to N-methyl pyrrolidone. ► Transport characteristics of the new membranes can be tailored via the crosslinking process. We report for the first time successful crosslinking of poly...

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Bibliographic Details
Published in:Separation and purification technology 2013-01, Vol.102 (4), p.142-146
Main Authors: Dutczak, S.M., Cuperus, F.P., Wessling, M., Stamatialis, D.F.
Format: Article
Language:English
Subjects:
Aprotic solvents
Covalent bonds
Crosslinking
Cut off
mechanical properties
Membranes
Molecular weight
Polyamide-imides
Polyamide–imide
Purification
pyrrolidones
Solvents
temperature
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Summary:► Crosslinking of polyamide–imide (Torlon®) based membranes using di-isocyanates. ► Crosslinked membranes are resistant to N-methyl pyrrolidone. ► Transport characteristics of the new membranes can be tailored via the crosslinking process. We report for the first time successful crosslinking of polyamide–imide (Torlon®) based membranes using di-isocyanates. The crosslinked membranes are resistant to N-methyl pyrrolidone (which is solvent of the non-crosslinked membranes) and have very good mechanical properties. In contrast to the state-of-the-art polyimide crosslinked membranes, the created covalent bond is expected to be thermally stable enabling applications at elevated temperatures. The transport characteristics (permeance and molecular weight cut off – MWCO) of the crosslinked membranes are changed in comparison to non-crosslinked ones. This suggests that the crosslinking process could be used to tailor these characteristics.
ISSN:1383-5866
1873-3794
DOI:10.1016/j.seppur.2012.10.018