Modification of Chitosan Using Glycidyl Methacrylate-grafted Cellulose (GMA-g-Cell/Chi) for Methylene Blue Adsorption

Abstract

In this study, a glycidyl methacrylate-grafted cellulose/chitosan (GMA-g-Cell/Chi) film was successfully prepared and characterized. GMA-g-Cell was obtained from the grafting process of cellulose derived from sugarcane bagasse using glycidyl methacrylate (GMA). The cellulose grafting process was obtained using 20% GMA for 4 h at 60 _C. The percentage of grafting (PG) and grafting efficiency (GE) values for these parameters were 516 and 60.28%, respectively. Chitosan was modified with GMA-g-Cell and has higher adsorption capacity and tensile strength than chitosan. The adsorption kinetics tend to follow the pseudo-first-order adsorption kinetics model, with Qe and k1 being 7 mg/g and 0.067 g/mg minute. The maximum adsorption capacity (Qmax) as a consequence was 182.37 mg/g. Thermodynamic data showed that the methylene blue adsorption process occurred physically and spontaneously.