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In light of the current energy demand, our reliance on fossil fuels has increased exponentially. The environmental impact associated with this practice has led many to seek approaches that enable the capture of carbon emissions. Conventional carbon capture techniques, such as amine absorption, are employed to address the resulting carbon footprints. However, these methods have drawbacks in terms of operational and environmental efficacy, as well as concerns regarding toxicity and operational expenditures. To address these constraints, numerous researchers have directed their efforts toward identifying alternate approaches, with Ionic Liquids [IL] emerging as one of the most viable contenders. Due to their characteristics such as low vapor pressure, high thermal stability, customizable structure, low flammability, and high affinity for CO2, ionic liquids (ILs) offer an excellent alternative to conventional carbon capture systems. Recent studies have shown that nanoconfinement of ionic liquids (ILs) within polymeric domains has increased their CO2 solubility. This suggests that ILs can be stabilized within the macromolecular matrix of the polymers and their non-ideal features can be utilized. It is crucial to comprehend the fundamental phenomena that drive the non-ideal behavior of ionic liquids (ILs) when they are integrated into polymeric domains. This study delves into assessing the influence of polymer molecular weight (MW) on the CO2 sorption capacity of supported ionic liquid membranes (SILM). Quasi-solid-state films were produced by combining 1-Ethyl-3-Methylimidazolium bis(trifluoromethyl sulfonyl)imide and Polyvinylidene Fluoride (PVDF) with various MWs (180,000, 275,000, 352,000, 534,000, 1,000,000 g/mol) and Kynar. The CO2 solubilities in these films were determined using the gravimetry method. The adsorption isotherms were measured concurrently with the heat of adsorption. The findings of our study demonstrate that the MW of PVDF plays a crucial role in determining the solubility of CO2 in SILMs. This emphasizes the significance of the intermolecular interactions, polymer swelling, and PVDF polymorphism in influencing the absorption of CO2 in SILM. Our research indicates that the mixture of PVDF(180K) and IL formed using a 1:1 ratio shows the highest potential for synthesizing SILMs. This mixture is capable of absorbing 3.1 moles of CO2 per kg of IL. The value is threefold greater than the CO2 sorption capacity of IL tested under the same conditions.