High-performance membranes from polyimides with intrinsic microporosity

Abstract

Membranes with high permeability to gases are formed from polyimides with rigid backbones that incorporate a spiro-centre. A route to this new range of high-free-volume polyimides is demonstrated, and exceptional performance is obtained for a polymer containing a dimethyl binaphthyl unit.

Keywords: membranes; microporous materials; polyimides; polymers.