Effect of air gap on gas permeance/selectivity performance of BTDA-TDI/MDI copolyimide hollow fiber membranes

E. P. Favvas, S. K. Papageorgiou, J. W. Nolan, K. L. Stefanopoulos, A. C. Mitropoulos, Journal of Applied Polymer Science (2013) 130, 4490-4499.