TY - JOUR
T1 - Preparation and properties of polybenzoxazole-based gas separation membranes
T2 - a comparative study between thermal rearrangement (TR) of poly(hydroxyimide) and thermal cyclodehydration of poly(hydroxyamide)
AU - Kushwaha, Ashish
AU - Dose, Michelle E.
AU - Smith, Zachary P.
AU - Luo, Shuangjiang
AU - Freeman, Benny D.
AU - Guo, Ruilan
N1 - Funding Information:
The authors would like to acknowledge financial support from the University of Notre Dame .
Funding Information:
Shuangjiang Luo would like to thank the partial financial support from the Center of Sustainable Energy at Notre Dame via the ND Energy Postdoctoral Fellowship Program.
Publisher Copyright:
© 2015 Elsevier Ltd.
Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2015/11/5
Y1 - 2015/11/5
N2 - This comparative study focuses on the cyclodehydration reaction of poly(hydroxyamide)s (PHAs) and the thermal rearrangement (TR) reaction of aromatic poly(hydroxyimide)s (APIs) to produce polybenzoxazoles (PBOs) for application as gas separation membranes. Systematic comparisons between the two routes showed that PHA cyclodehydration can produce fully converted PBO membranes at a temperature more than 100°C lower than the API-TR route. Gas separation performance of PHA-PBOs is comparable to API-TR polymers, and PHA-PBOs are considerably more mechanically robust. More importantly, PBO films can be produced equally well in both air and inert atmospheres via the PHA cyclodehydration route. The PHA-PBOs formed in air have statistically the same physical and transport properties as those formed in N2. The present study provides fundamental information regarding the PHA-to-PBO cyclodehydration process.
AB - This comparative study focuses on the cyclodehydration reaction of poly(hydroxyamide)s (PHAs) and the thermal rearrangement (TR) reaction of aromatic poly(hydroxyimide)s (APIs) to produce polybenzoxazoles (PBOs) for application as gas separation membranes. Systematic comparisons between the two routes showed that PHA cyclodehydration can produce fully converted PBO membranes at a temperature more than 100°C lower than the API-TR route. Gas separation performance of PHA-PBOs is comparable to API-TR polymers, and PHA-PBOs are considerably more mechanically robust. More importantly, PBO films can be produced equally well in both air and inert atmospheres via the PHA cyclodehydration route. The PHA-PBOs formed in air have statistically the same physical and transport properties as those formed in N2. The present study provides fundamental information regarding the PHA-to-PBO cyclodehydration process.
KW - Gas separation membrane
KW - Poly(hydroxyamide) cyclodehydration
KW - Polybenzoxazole (PBO)
UR - http://www.scopus.com/inward/record.url?scp=84943338678&partnerID=8YFLogxK
U2 - 10.1016/j.polymer.2015.09.045
DO - 10.1016/j.polymer.2015.09.045
M3 - Article
AN - SCOPUS:84943338678
SN - 0032-3861
VL - 78
SP - 81
EP - 93
JO - Polymer
JF - Polymer
ER -