Absorption characterization of Ca2+, Na+, and K+ on irradiation crosslinked carboxymethyl sago pulp hydrogel. Issue 3 (1st August 2012)

• Record Type: Journal Article
• Authors: Pushpamalar, Vengidesh; Langford, Steven James; Ahmad, Mansor; Hashim, Kamaruddin; Lim, Yau Yan
• Is Part Of: Journal of applied polymer science. Volume 128:Issue 3(2013:May 05)
• Page Start: 1828
• Page End: 1833
• Publication Date: 2012-08-01
• Subjects: absorption -- crosslinking -- electron beam irradiation -- hydrogels -- hydrophilic polymers; Polymers -- Periodicals; Polymerization -- Periodicals; 668.9
• DOI: 10.1002/app.38342
• Languages: English
• ISSNs: 0021-8995

Abstract

Abstract: Hydrogel of carboxymethyl sago pulp (CMSP) of various degree of substitution (DS) was prepared by electron beam irradiation of various radiation doses. The CMSP hydrogels were subjected to swelling in different ionic strength solutions of KCl, NaCl, and CaCl2 . The CMSP hydrogels, due to its polyelectrolyte nature, were found to be highly sensitive to ionic strength of the medium. All the CMSP hydrogels showed the absorption of K + and Ca 2+ increases with the increase in the concentrations of the respective cation solutions. The cation absorption also decreases with DS and % gel fraction (%GF) of the CMSP hydrogels. Subjecting the CMSP hydrogels in NaCl results in deswelling and releases Na + to swelling medium where the Na + release increases with the increase of DS and %GF. The sorption capacity depends on the extent of crosslinking and decreases with the increase in the extent of crosslinking. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013 Abstract :