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<p>Gas separation using polymer membranes has become increasingly important in industrial processes because of their low energy requirements and ease of operation. Among these, poly(methyl methacrylate) (PMMA) membranes are attractive due to their stability and processability, but their separation efficiency is often limited. In this study, we explored the reinforcement of PMMA with graphene oxide/zinc oxide (GO/ZnO) nanocomposites to improve both transport and material properties. GO/ZnO nanofillers were synthesized and incorporated into PMMA thin films through solution casting followed by the wet phase inversion method with different loadings (1-10 wt.%). Characterization by FTIR, DSC, SEM-EDS, tensile testing, and contact angle measurements confirmed good compatibility between polymer and nanofillers, enhanced thermal resistance, improved mechanical strength, Contact angle shift from hydrophilic value 70 to the hydrophobic value119<sup>0</sup>, respectively. Gas permeation tests for H<sub>2</sub>, N<sub>2</sub>, CO<sub>2</sub>, and CH<sub>4</sub> demonstrated that the 10 wt.% GO/ZnO membrane provided the highest permeability, while also delivering superior H<sub>2</sub>/CH<sub>4</sub> selectivity compared to unmodified PMMA. These results suggest that combining GO with ZnO nanoparticles offers a simple and effective strategy to design PMMA-based membranes with improved separation performance, making them promising candidates for hydrogen purification and related gas separation technologies.</p> Graphical Abstract <p></p>

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Studies of PMMA Membrane Reinforced with GO/ZnO Nanoparticles for the Gas Separation

  • 期刊论文

  • 发表日期：

    2026年4月4日

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  • Harsh D. Patel,
  • Vishwajit Chavda,
  • Jigisha Patel,
  • N. K. Acharya,
  • Vaishali Suthar

摘要

Gas separation using polymer membranes has become increasingly important in industrial processes because of their low energy requirements and ease of operation. Among these, poly(methyl methacrylate) (PMMA) membranes are attractive due to their stability and processability, but their separation efficiency is often limited. In this study, we explored the reinforcement of PMMA with graphene oxide/zinc oxide (GO/ZnO) nanocomposites to improve both transport and material properties. GO/ZnO nanofillers were synthesized and incorporated into PMMA thin films through solution casting followed by the wet phase inversion method with different loadings (1-10 wt.%). Characterization by FTIR, DSC, SEM-EDS, tensile testing, and contact angle measurements confirmed good compatibility between polymer and nanofillers, enhanced thermal resistance, improved mechanical strength, Contact angle shift from hydrophilic value 70 to the hydrophobic value1190, respectively. Gas permeation tests for H2, N2, CO2, and CH4 demonstrated that the 10 wt.% GO/ZnO membrane provided the highest permeability, while also delivering superior H2/CH4 selectivity compared to unmodified PMMA. These results suggest that combining GO with ZnO nanoparticles offers a simple and effective strategy to design PMMA-based membranes with improved separation performance, making them promising candidates for hydrogen purification and related gas separation technologies.

Graphical Abstract