Sustainable Gas Separation Membranes: Biopolymer and Green Solvent
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초록
내용
Membrane-based gas separation technology is attractive as a viable alternative to conventional energy-intensive separation processes due to its eco-friendly operation, energy efficiency. However, using petroleum-based polymers or toxic solvents adversely affects human health and the environment. Polysulfone (PSF), derived from petrochemistry, currently holds a significant share in the global gas separation membrane market due to its low material cost and moderate separation performance. However, bisphenol-A (BPA) in PSF can cause endocrine disruption in the human body. Isosorbide (ISB), derived from biomass, is a promising alternative to the BPA. In this study, we investigate the ISB-substituted poly(arylene ether) biopolymer membranes prepared by DMSO as a green solvent for gas separation. In particular, we establish the structure-performance relationship based on the analyses of positron annihilation lifetime spectra and transport characterization results.