Polypropylene hollow fibre membranes treated with grafted‐aminated poly (glycidyl methacrylate) in the gas mixture separation

Abstract Bonding polymerization is a straightforward and efficient approach for enhancing the quality of adsorbents and improving the properties of polymers and their bonding chains. The objective of this research was to enhance the ability of polypropylene hollow fibres to adsorb CO 2 . The surface of the adsorbent was modified using gamma irradiation in combination with glycidyl methacrylate and different amines, such as ethanolamine, triethylamine, and diethylamine. The efficacy of the modification process was evaluated by altering the graft variables, such as monomer concentration and gamma dose rate to determine the grafting degree (GD, %). Similarly, the amination yield (DA, %) was controlled through changes in the amine parameters, including amine type and concentration. Scanning electron microscope (SEM) techniques were used to examine the morphology of the modified hollow fibre membrane, while Fourier transform infrared spectroscopy (FTIR) was utilized to analyze the chemical structures of the fibres. Subsequently, the impact of gas flow intensity at the CO 2 inlet, with flow rates of 50, 100, and 150 cm 3 /min, and concentrations of 5%, 10%, and 15%, was investigated. The adsorption rate decreased significantly with an increase in gas flow rate at the inlet due to the short contact time and quick saturation. Additionally, the adsorption rate decreases notably with the increment of CO 2 concentration. The findings of this study indicate that the utilization of radiation resulted in the creation of a unique adsorbent with exceptional adsorption capabilities. Furthermore, this adsorbent was effectively recognized during the process of carbon dioxide adsorption.