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International Journal of Polymer Science
Volume 2017 (2017), Article ID 3476921, 6 pages
Research Article

Superabsorbent Polymer Based on Sodium Carboxymethyl Cellulose Grafted Polyacrylic Acid by Inverse Suspension Polymerization

Department of Science, Faculty of Science and Technology, Prince of Songkla University, Pattani 94000, Thailand

Correspondence should be addressed to Pairote Klinpituksa

Received 25 December 2016; Revised 1 February 2017; Accepted 12 February 2017; Published 27 March 2017

Academic Editor: Antje Potthast

Copyright © 2017 Pairote Klinpituksa and Patchareeya Kosaiyakanon. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A superabsorbent polymer (SAP) based on graft copolymerization of sodium carboxymethyl cellulose and acrylic acid was prepared by inverse suspension polymerization using potassium persulfate as an initiator and N,N′-methylenebisacrylamide as a cross-linker. Experiments were performed at 70°C for 90 min but varying the concentrations of sodium carboxymethyl cellulose (NaCMC), acrylic acid (AA), potassium persulfate (KPS), and N,N′-methylenebisacrylamide (MBA), and also varying % neutralization of AA. The maximum swelling capacity for SAP was 544.95 g/g in distilled water and 44.0 g/g in 0.9% w/v NaCl solution. This near optimal SAP was prepared using 2.0 g/100 mL NaCMC, 1.0 mol/L AA with 70% neutralization, 0.014 mol/L KPS, and 0.01 mol/L MBA.