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This study explores the upcycling of polyethylene terephthalate (PET) plastic bottles into functional metal–organic frameworks (MOFs) for CO2 adsorption application, aiming to address environmental problem of plastic waste accumulation. Specifically, it focuses on synthesizing MIL-88B(Fe) MOF derived from PET chemical depolymerization. MIL-88B(Fe) was further functionalized with hexamethylenediamine (HMD) obtained from nylon 6,6 digestion. Using microwave-assisted acidic hydrolysis, PET and nylon 6,6 were rapidly depolymerized into their constituent monomers, terephthalic acid (TPA) and HMD, respectively. MIL-88B(Fe) MOF was synthesized from reaction between TPA and ferric chloride and was then further functionalized with HMD. The obtained MOFs were characterized via XRD, FTIR, FE-SEM, and elemental analysis. The results reveal that the crystal structure of MIL-88B(Fe) undergoes significant changes post-functionalization with HMD. The CO2 adsorption capacity of the synthesized MOFs was also assessed, showing a marked difference between MIL-88B(Fe) and MIL-88B(Fe)-HMD. This research demonstrates the potential of converting waste into high-value MOFs, addressing environmental concerns and contributing to sustainable waste management and the development of advanced materials for gas storage, particularly CO2.

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Upcycling PET Plastic Bottle and Nylon 6,6 to Functional Metal Organic Frameworks for CO2 Adsorption

  • 会议论文

  • 发表日期：

    2025年

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  • Chawala Jermkuntod,
  • Thilina Rajeendre Katugampalage,
  • Preeti Waribam,
  • Wanida Chooaksorn,
  • Chalita Ratanatawanate,
  • Pakorn Opaprakasit,
  • Paiboon Sreearunothai

摘要

This study explores the upcycling of polyethylene terephthalate (PET) plastic bottles into functional metal–organic frameworks (MOFs) for CO2 adsorption application, aiming to address environmental problem of plastic waste accumulation. Specifically, it focuses on synthesizing MIL-88B(Fe) MOF derived from PET chemical depolymerization. MIL-88B(Fe) was further functionalized with hexamethylenediamine (HMD) obtained from nylon 6,6 digestion. Using microwave-assisted acidic hydrolysis, PET and nylon 6,6 were rapidly depolymerized into their constituent monomers, terephthalic acid (TPA) and HMD, respectively. MIL-88B(Fe) MOF was synthesized from reaction between TPA and ferric chloride and was then further functionalized with HMD. The obtained MOFs were characterized via XRD, FTIR, FE-SEM, and elemental analysis. The results reveal that the crystal structure of MIL-88B(Fe) undergoes significant changes post-functionalization with HMD. The CO2 adsorption capacity of the synthesized MOFs was also assessed, showing a marked difference between MIL-88B(Fe) and MIL-88B(Fe)-HMD. This research demonstrates the potential of converting waste into high-value MOFs, addressing environmental concerns and contributing to sustainable waste management and the development of advanced materials for gas storage, particularly CO2.