Synthesis of graft copolymer of kappa-carrageenan using microwave energy and studies of swelling capacity, flocculation properties, and preliminary acute toxicity

Authors : Tapan Kumar GIRI, Minakshi PRADHAN, Dulal Krishna TRIPATHI

Pages : 283-295

View : 17 | Download : 7

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :Grafting of acrylamide insert ignore into journalissuearticles values(AAm); onto kappa-carrageenan insert ignore into journalissuearticles values(KC); was carried out using microwave irradiation in the presence of ammonium persulfate insert ignore into journalissuearticles values(APS); as initiator. The effect of reaction variables including the concentration of APS, AAm, and KC; time duration; and microwave power was studied. Fourier transform infrared spectroscopy insert ignore into journalissuearticles values(FT-IR);, X-ray diffraction insert ignore into journalissuearticles values(XRD);, differential scanning calorimetry insert ignore into journalissuearticles values(DSC);, and scanning electron microscopy insert ignore into journalissuearticles values(SEM); were carried out to characterize the graft copolymer. The graft copolymer possesses slightly sensitive activities to external pH and shows reversible on--off switching swelling characteristics. Flocculation efficacy of the graft copolymer was studied in coal fine suspension toward potential application as a flocculent. The acute oral toxicity study of the graft copolymer was evaluated as per OECD guidelines. Mice administered the graft copolymer did not show anomalous behavior during the 14-day study. No mortality was observed during the 14 days following treatment with the graft copolymer.
Keywords : Grafting, pH sensitive, biopolymer, grafting, swelling, toxicity