SWELLING KINETICS STUDY OF HYDROLYZED CARBOXYMETHYLCELLULOSE-POLY (SODIUM ACRYLATE-CO-ACRYLAMIDE) SUPERABSORBENT HYDROGEL WITH SALT-SENSITIVITY PROPERTIES

work, we have focused on study of swelling kinetics and salt-sensitivity behavior of a superabsorbing hydrogel based on carboxymethylcellulose (CMC) and polyacrylonitrile (PAN). The physical mixture of CMC and PAN was hydrolyzed by NaOH solution to yield hydrogel, CMC-poly (sodium acrylate-co-acrylamide). The swelling kinetics of the hydrogels with various particle sizes was preliminary investigated as well. The swelling of the hydrogel showed a second order kinetics of swelling in water. In addition, swelling measurements of the synthesized hydrogels in various chloride salt solutions was measured. Results indicated that a swelling-loss with an increase in the ionic strength of the salt solutions.