Grafting Vinyl Monomers onto Chitosan:IV:Graft Copolymerized of Acrylicacid onto Chitosan Using Ceric Ammonium Nitrate as the Initiator— Characterization and Antimicrobial Activities

Abstract

Acrylicacid was grafted onto chitosan by using the ceric ammonium nitrate as the initiator. The effect of initiator concentration, monomer concentration, time & temperature on % G and % GE were studied. The grafted samples were characterized using FTIR, TGA, SEM and XRD methods. From the FTIR data it was ascertained that grafting has occurred considerably. The morphology of the grafted polymer was observed from the SEM picture. The thermal analysis indicated the different stages of degradation of the grafted copolymer. Evidence of grafting was obtained from comparison of SEM, XRD, and FTIR of the grafted and nongrafted chitosan as well as solubility characteristics of the products. The antibacterial and antifungal activities of the grafted polymer have also been investigated.

Characterization of Microwave-Controlled Polyacrylamide Graft Copolymer of Tamarind Seed Polysaccharide

“…The grafting reaches its optimum level when both of these parameters have been optimized; similarly, the grafting is worse when these two parameters are at their lowest values. Pati et al also reported in their study that the percentage of grafting was found to increase linearly with time, and then to remain approximately constant [39].…”

“…These results on the effect of the initiator on grafting were also supported by Pati et al, who showed that a further increase in initiator concentration leads to a decrease in the grafting percentage of the monomer. They reported that ceric ion at higher concentrations causes the termination of grafted polymeric chain growth, since ceric ion is a very good terminator [39].…”

A Review on the Modification of Polysaccharide Through Graft Copolymerization for Various Potential Applications

“…Pati et al , synthesized graft copolymerization of methyl methacrylate onto chitosan was investigated using ceric ammonium nitrate as the initiator. The effects of initiator concentration, monomer concentration, time and temperature on %G and %GE were studied [ 30 ]. Dincer et al , investigated the polymerization of acrylamide, initiated by a cerium (IV) ammonium nitrate-methionine redox initiator system was carried out in an aqueous solution at different reaction conditions [ 31 ].…”

Hydrogel-integrated optical fiber sensors and their applications: a comprehensive review

“…147 HPMC is a hydrophilic hydrogel polymeric material with excellent hygroscopic properties, enabling it to be a superior material for fiber optic humidity sensors. 254 Even though several hydrogel-integrated humidity sensing materials have been reported, namely, chitosan, 255 agarose, 256 CA, 257 and PVA, 258 HPMC demonstrates superior biocompatibility. 259 The proposed sensor comprised of three parts – 100 μm HCF fused with SMF through a fiber fusion splicer and a 10 μm HPMC hydrogel covering at the end face of HCF (Fig.…”