Preparation of polymers of intrinsic microporosity composite membranes incorporated with modified nano‐fumed silica for butanol separation

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Abstract
In this work, the modified nano‐fumed silica particles (MNFS) as fillers were incorporated into the polymer of intrinsic microporosity (PIM‐1) matrix to fabricate composite membranes for removing butanol from water. A range of characterization techniques was employed to analyze the properties and pervaporation (PV) performances of the composite membranes. It was found that the addition of MNFS into the PIM‐1 matrix dramatically decreased the swelling degree as compared to pure PIM‐1, implying an increment of the stability of separation performances. Moreover, the PV performances of the composite membranes were significantly enhanced, and the superior PV performances were on account of the following reasons: there was a good compatibility between PIM‐1 and MNFS; and the incorporation of MNFS improved the hydrophobicity of the membranes and disrupted the packing of polymer chains, therefore providing special channels for rapid transport of butanol molecules.
Funding Information
  • Education Scientific Research Project of Youth Teacher in the Education Department of Fujian Province (JAT170550, B201725, JAT170551, B201726)
  • Foundation of Science and Technology on Sanming Institute of Fluorochemical Industry (FCIT20171213)
  • Scientific Research Foundation for Introducing Talent of Sanming University (17YG04, 17YG07)
  • Cleaner Production Technology of University Engineering Research Center of Fujian Province
  • Mine Ecological Restoration of Engineering Technology Research Center of Fujian Province

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