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<p>In this study, acetone-assisted interfacial polymerization (IP) was employed to fabricate thin-film composite (TFC) membrane with enhanced pervaporation performance. The selective polyamide layer was formed by the reaction of meta-phenylenediamine (MPD) and trimesoyl chloride (TMC) on hydrolyzed polyacrylonitrile (PAN) support. Acetone was introduced into the aqueous MPD phase at varying concentrations to regulate monomer diffusion and reaction kinetics at the interface of water and n-hexane. The influence of acetone content on polyamide membrane structure and intrinsic pervaporation separation performance was systematically investigated. Among the fabricated membranes, the TFC–A<sub><i>75</i></sub> membrane, prepared with 75 wt% acetone in the aqueous phase, exhibited superior separation properties. When tested with a 70 wt% isopropanol/water mixture at 25&#xa0;°C, the membrane delivered a high permeation flux of 1199.5 ± 135.9&#xa0;g·m⁻<sup>2</sup>·h⁻<sup>1</sup> and an outstanding water content of 99.42 ± 0.67 wt% in the permeate. Furthermore, the membrane maintained excellent separation efficiency across a wide range of feed temperatures and concentrations, confirming both its robustness and applicability for isopropanol dehydration.</p>

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Acetone-modulated interfacial polymerization of thin-film composite polyamide membrane for improved pervaporation dehydration of isopropanol

  • 期刊论文

  • 发表日期：

    2026年1月17日

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  • Hsi Chen,
  • Marwin R. Gallardo,
  • Chi-Lan Li,
  • Hui-An Tsai,
  • Yung Chang,
  • Shu-Hsien Huang,
  • Kueir-Rarn Lee

摘要

In this study, acetone-assisted interfacial polymerization (IP) was employed to fabricate thin-film composite (TFC) membrane with enhanced pervaporation performance. The selective polyamide layer was formed by the reaction of meta-phenylenediamine (MPD) and trimesoyl chloride (TMC) on hydrolyzed polyacrylonitrile (PAN) support. Acetone was introduced into the aqueous MPD phase at varying concentrations to regulate monomer diffusion and reaction kinetics at the interface of water and n-hexane. The influence of acetone content on polyamide membrane structure and intrinsic pervaporation separation performance was systematically investigated. Among the fabricated membranes, the TFC–A75 membrane, prepared with 75 wt% acetone in the aqueous phase, exhibited superior separation properties. When tested with a 70 wt% isopropanol/water mixture at 25 °C, the membrane delivered a high permeation flux of 1199.5 ± 135.9 g·m⁻2·h⁻1 and an outstanding water content of 99.42 ± 0.67 wt% in the permeate. Furthermore, the membrane maintained excellent separation efficiency across a wide range of feed temperatures and concentrations, confirming both its robustness and applicability for isopropanol dehydration.