Alginate-based nanocomposite films reinforced with halloysite nanotubes functionalized by alkali treatment and zinc oxide nanoparticles

International Journal of Biological Macromolecules
Shiv ShankarJong-Whan Rhim

Abstract

Functionalized halloysite nanotubes were prepared by surface activation of halloysite (Hal) with sodium hydroxide and deposition of zinc oxide nanoparticles (ZnONP). The surface charge of Hal was changed from 0.18 ± 0.6 mV to -35.2 ± 2.8 mV after alkali treatment. The functionalized Hal (AT-Hal/ZnONP) was incorporated into alginate biopolymer as a reinforcing filler with different concentration of AT-Hal/ZnONP (1, 3, 5, and 7 wt% of alginate). Alginate films with AT-Hal/ZnONP exhibited a significant increase in the mechanical, water vapor barrier, and UV light barrier properties. The thermal stability of composite films has not changed after AT-Hal/ZnONP incorporation. The AT-Hal/ZnONP incorporated alginate films demonstrated strong antibacterial activity against food-borne pathogenic bacteria, Escherichia coli and Listeria monocytogenes. The nanocomposite film with 7 wt% of AT-Hal/ZnONP exhibited complete sterilization of E. coli and L. monocytogenes after 3 and 9 h of treatment, respectively.

Citations

May 10, 2019·Nanomaterials·Anna StavitskayaRawil Fakhrullin
Mar 12, 2020·International Journal of Biological Macromolecules·Fatima ZiaMohammad Zuber
Feb 20, 2021·International Journal of Biological Macromolecules·Muhammad BilalSarmad Ahmad Qamar
Aug 11, 2019·Journal of Colloid and Interface Science·Marina MassaroMarco d'Ischia
Mar 17, 2020·Carbohydrate Polymers·Kokkarachedu VaraprasadEmmanuel Rotimi Sadiku
Nov 18, 2018·International Journal of Biological Macromolecules·Atefeh AmaniMahnaz Mahmoudirad

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