Incorporation of graphene oxide and reduced graphene oxide on the performance of hybrid polysulfone membranes for gas permeation
DOI:
https://doi.org/10.18226/23185279.e231105Keywords:
Additives, gas permeation, hybrid membranes, membrane separation process, permeabilityAbstract
Polymeric membranes with the addition of graphene and derivatives are being studied due to the impacts on the physical-chemical and separation properties of these membranes. In this study, polysulfone (PSU) membranes containing graphene oxide (PSU/GO) and reduced graphene oxide (PSU/RGO) were developed at a concentration of 0.5 wt.%, to compare their characteristics and physical-chemical properties. Membrane morphology was evaluated by SEM, thermal stability by TGA/DTG, functional groups and material structure by FTIR, and mechanical properties by pressure test and gas permeation test using synthetic air. Agglomeration of GO and RGO was verified, a factor that may have interfered with the performance of the membranes. There was no change in thermal stability of the membranes with the presence of GO/RGO nor the occurrence of new bands observed in FTIR spectra, indicating that the interactions between PSU and GO/RGO were physical. All membranes resisted the maximum system pressure (6 bar), and it was not possible to identify whether the addition of graphene-derived materials had a positive effect on the mechanical strength. PSU/GO membranes had a better performance regarding synthetic air permeability during the gas permeation test than PSU and PSU/RGO membranes, possibly due to the functional groups present in GO.
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Copyright (c) 2023 Laís Gilioli Tosin, Wendel Paulo Silvestre, Camila Baldasso (Author)
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