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<p>Conventional polymeric membrane manufacturing faces significant limitations, including reliance on harsh chemicals, limited geometrical shapes (primarily flat sheets and hollow fibers), low resolution, and slow production speeds. This study introduces an innovative approach for 3D printing complex-shaped membranes with tailored properties, utilizing polymerization-induced phase separation (PIPS) and masked stereolithography (MSLA). The influence of processing parameters, including resin volume, irradiation duration, and temperature, on membrane characteristics—such as pore size, porosity, thickness, surface morphology, water permeability, and rejection rate— is systematically investigated. The findings indicate that this method can fabricate membranes with a wide range of pore sizes and porosities. The membrane architecture comprises interconnected nodules, the dimensions of which are contingent upon the processing conditions. Furthermore, the study demonstrates that PIPS facilitates the phase inversion of thermosets and the incorporation of environmentally friendly biobased solvents, thereby broadening the scope of membrane fabrication with novel polymers.</p>

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Masked stereolithography and polymerization induced phase separation for 3D printing of membranes

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年5月29日

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  • Bastian Stiem Kirkebæk,
  • Aamer Ali,
  • Cejna Anna Quist-Jensen

摘要

Conventional polymeric membrane manufacturing faces significant limitations, including reliance on harsh chemicals, limited geometrical shapes (primarily flat sheets and hollow fibers), low resolution, and slow production speeds. This study introduces an innovative approach for 3D printing complex-shaped membranes with tailored properties, utilizing polymerization-induced phase separation (PIPS) and masked stereolithography (MSLA). The influence of processing parameters, including resin volume, irradiation duration, and temperature, on membrane characteristics—such as pore size, porosity, thickness, surface morphology, water permeability, and rejection rate— is systematically investigated. The findings indicate that this method can fabricate membranes with a wide range of pore sizes and porosities. The membrane architecture comprises interconnected nodules, the dimensions of which are contingent upon the processing conditions. Furthermore, the study demonstrates that PIPS facilitates the phase inversion of thermosets and the incorporation of environmentally friendly biobased solvents, thereby broadening the scope of membrane fabrication with novel polymers.