Abstract
Mixed matrix membranes derived from a spirobifluorene polymer of intrinsic microporosity and polyphenylene networks for the separation of toluene from dimethyl sulfoxide
Highlights
The first solution-processable polymers of intrinsic microporosity (PIMs), which possess high free volume in the glassy state due to inefficient packing of their rigid, contorted macromolecular backbones, were reported in 2004.1 PIMs have since been the focus of much research activity, especially for applications as membrane materials.[2,3] The prototypical PIM-1 (1, Figure 1) is synthesised by a step-growth polymerization involving double aromatic nucleophilic substitution reactions between 5,5′,6,6′-tetrahydroxy-3,3,3′,3′-tetramethyl-1,1′spirobisindane and tetrafluoroterephthalonitrile
The resulting PIM-SBF polymer is freely soluble in chloroform, showing number-average molecular weight (Mn) of 66,500 g mol-1 and weight-average molecular weight (Mw) of 170,000 g mol-1, relative to polystyrene standard samples, measured by gel permeation chromatography (GPC)
A spirobifluorene polymer of intrinsic microporosity forms membranes that are stable in a mixture of toluene and dimethyl sulfoxide (DMSO) without further crosslinking
Summary
Budd*a aDepartment of Chemistry, University of Manchester, Manchester M13 9PL, UK bEastChem, School of Chemistry, University of Edinburgh, David Brewster Road, Edinburgh EH9 3FJ, UK cA.V. Topchiev Institute of Petrochemical Synthesis, 29 Leninsky Av., Moscow 119991, Russian Federation. Dedicated to Professor Philip Hodge, recognising his contributions to polymer chemistry over 45 years
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