In addition, the morphology of the swollen hydro-gel was characterized using FEI, Quanta 400 scanning electronmicroscopy. The hydrogels were soaked in distilled water and thenwere freeze dried to remove the water molecule before coated withgold. The thermal stability of CMSS-acid hydrogel was examinedusing Perkin Elmer TGA 7. The samples were heated from 35.00to 600.00◦C with the rate of 5◦C/min in the flow of inert nitrogengas