Amine‐Functionalized Radiation‐Induced Glycidyl Methacrylate–Grafted Polyamide 6 for CO ₂ Capture Using Pressure Swing Adsorption

Abstract

ABSTRACT This study presents a method for the preparation of polymeric adsorbents which involves the simultaneous radiation‐induced grafting of glycidyl methacrylate onto Polyamide 6 fibres (GMA‐g‐PA6), followed by the functionalization of the grafted fibres with ethanolamine. The factors, like monomer concentration and radiation dose, which affect the degree of grafting are studied. The prepared polymeric adsorbents were characterized using Fourier‐transform infrared (FTIR), field emission scanning electron microscopy (FE‐SEM), thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The adsorbents were evaluated for CO 2 adsorption from a gas mixture of N 2 and CO 2 containing 5%–15% CO 2 , using pressure swing adsorption at four different (1, 3, 5 and 7 bar) pressures. The sample with the highest degree of amination has shown maximum adsorption capacity 1.64 mmol g −1 at 7 bar for 15% CO 2 concentration at 20°C. The CO 2 adsorption on the prepared adsorbents followed a fractional‐order kinetic model. The experimental data aligned effectively with the Freundlich model, reflecting the non‐uniform nature of the adsorbent surface. The regeneration ability of the adsorbent was evaluated over five adsorption–desorption cycles, demonstrating good stability with minimal loss in adsorption capacity. 2025 Society of Chemical Industry and John Wiley & Sons, Ltd.

Affiliated Institutions

• Thapar Institute of Engineering & Technology IN
• Bhabha Atomic Research Centre IN

Related Publications