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Green and facile synthesis of carboxymethylcellulose/ZnO nanocomposite hydrogels crosslinked with Zn2+ ions
Ist Teil von
International journal of biological macromolecules, 2020-11, Vol.162, p.229-235
Ort / Verlag
Elsevier B.V
Erscheinungsjahr
2020
Link zum Volltext
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
A green method was used for the preparation of functional carboxymethyl cellulose (CMC) hydrogel crosslinked by divalent zinc ions and incorporated with zinc oxide nanoparticles (ZnO) without using alkaline reagents. In the process, sodium carboxymethyl cellulose was used not only as a hydrogel matrix but also for the release of free hydroxyl groups, which increases the pH of the reaction mixture, consequently leading to the formation of ZnO. The chemical structure and morphology of the hydrogels were characterized using FTIR and FE-SEM analysis, respectively. The water absorption capacity of the hydrogels was studied as a function of temperature and pH. The results of FE-SEM showed the formation of ZnO particles in the hydrogel, while the water absorption capacity results supported the formation of zinc ion cross-linking within the carboxymethylcellulose chains. The CMC/ZnO nanocomposite hydrogel exhibited strong antimicrobial activity against pathogenic bacteria E. coli and L. monocytogenes.
•Zn2+ ion cross-linked carboxymethyl cellulose/ZnO hydrogels were prepared.•Instead of NaOH, Na-CMC initiated the formation of ZnO nanoparticles in this novel method.•ZnO nanoparticles are distributed uniformly in the nanocomposite hydrogels.•The nanocomposite hydrogels show antimicrobial effect against pathogenic bacteria.•Hydrogels with improved properties are suitable for biomedical applications.