Radiation-induced grafting ofN,N?-dimethylaminoethylmethacrylate onto chitosan films

Abstract

Chitosan films were grafted with N,N-dimethylaminoethylmethacrylate using the 60 Co gamma irradiation method. The effect of solvent composition, monomer concentration, dose rate, and total dose on grafting was studied. The solvent composition has a marked effect on the degree of grafting. Maximum yield was obtained in the water-methanol (1 : 1) system. The percent grafting increased with monomer concentration and was found to be higher at a lower dose rate for a constant total dose of 0.216 Mrad. The tensile strength, crystallinity, and degree of swelling of grafted films decreased on increasing graft level. However, the graft copolymers showed improved thermal stability.

Chitosan derivatives obtained by chemical modifications for biomedical and environmental applications

“…It was found that the grafting yield increased with the increase in the adsorbed dose. Singh and Roy have also reported radiation grafting of chitosan with N,N -dimethylaminoethylmethacrylate (DMAEMA) [39]. Parameters such as solvent composition, monomer concentration, radiation dose rate, and total dose/time were found to affect the rate of grafting and homopolymerization.…”

Chitosan: The Most Valuable Derivative of Chitin

“…The study showed that permeation control can be achieved by varying the amount of cross-linking agent [181]. Hirano et al [182,183] prepared a series of membranes from chitosan and its derivatives, and the membranes showed improved dialysis properties. They observed that permeability properties of N-acetyl chitosan membranes were similar to those of an Amicon Diaflo membrane UM-10 (Amicon Ltd., England).…”

Adsorption of Cr(VI) using silica-based adsorbent prepared by radiation-induced grafting

“…What's more, the adsorbents with different grafting yield (GY) can be easily prepared by controlling the irradiation conditions. Dimethylaminoethyl methacrylate (DMAEMA) has been grafted onto various matrix materials by radiation technique [20][21][22][23][24]. As tertiary and quaternary amino groups can be easily incorporated into matrix materials, the DMAEMA grafted materials have also been utilized for adsorption and separation of heavy metal ions [21,22,25].…”