Solution-Processed, Organophilic Membrane Derived from a Polymer of Intrinsic Microporosity


  • We acknowledge the financial support of the Engineering and Physical Sciences Research Council (EPSRC). We are grateful to Prof. John L. Stanford and Paula J. Crook of the Manchester Materials Science Centre for DMTA measurements.


A polymer with a rigid, randomly contorted molecular structure (see Figure), incorporating fused rings connected by spiro-centres, may be precipitated or cast from solution to give microporous powders and membranes stable up to temperatures of 350 °C, with apparent surface areas > 600 m2 g–1. Organophilic membranes may be formed, as demonstrated by the separation of phenol from water by pervaporation.