SYNTHESIS AND CHARACTERIZATION OF SUPERABSORBENTCOMPOSITE BASED ON NATURAL POLYSACCHARIDEM. Khan and S. Loonker
In this work, Superabsorbent composite was synthesized based on guar gum and acrylic acid by free radicalgraft copolymerization reaction using N,N-methylene bisacrylamide as a cross linking agent and potassiumpersulphate as an initiator in complete aqueous solution to make it environmental friendly. The compositewas synthesized to be used as superabsorbent for the purpose of water absorption. Fourier transforminfrared analysis was carried out to confirm grafting of acrylic acid onto guar gum. The Thermal gravimetricanalysis confirms the stability of composite. The composite was characterized by X-ray diffraction to studyits crystalline nature. The Scanning electron microscopy analysis was used to study the morphology ofcomposite. The water absorption capacity of superabsorbent was measured in distilled water by free swellingmethod as a function of percentage swelling and found to be 4600%. The effect of reaction parameters suchas guar gum concentration, monomer concentration, initiator concentration, cross-linker concentration andpH on percentage swelling was also studied.