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Novel superabsorbent cellulose‐based hydrogels crosslinked with citric acid
Author(s) -
Demitri Christian,
Del Sole Roberta,
Scalera Francesca,
Sannino Alessandro,
Vasapollo Giuseppe,
Maffezzoli Alfonso,
Ambrosio Luigi,
Nicolais Luigi
Publication year - 2008
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.28660
Subject(s) - self healing hydrogels , citric acid , superabsorbent polymer , swelling , cellulose , fourier transform infrared spectroscopy , chemistry , polymer chemistry , differential scanning calorimetry , chemical engineering , reagent , hydroxyethyl cellulose , hydroxypropyl cellulose , polymer , swelling capacity , nuclear chemistry , materials science , organic chemistry , engineering , physics , thermodynamics
Abstract This work is focused on the preparation of new environmentally friendly hydrogels derived from cellulose and hence originating from renewable resources and characterized by biodegradable properties. Two cellulose derivatives, sodium carboxymethylcellulose (CMCNa) and hydroxyethylcellulose (HEC), were used for superabsorbent hydrogel preparation. Citric acid (CA), a crosslinking agent able to overcome toxicity and costs associated with other crosslinking reagents, was selected in a heat activated reaction. Differential scanning calorimeter (DSC), fourier transform infrared spectroscopy (FTIR), and swelling measurements were performed during the reaction progress to investigate the CA reactivity with each of the polymers. Also, CMCNa/HEC polymer mixtures (3/1 w/w) crosslinked with CA were investigated and compared with previous results. Finally, a possible reaction mechanism was proposed. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008