Journal
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
Volume 156, Issue -, Pages 1174-1182Publisher
ELSEVIER
DOI: 10.1016/j.ijbiomac.2019.11.153
Keywords
Nanocellulose; Titanium dioxide nanoparticle; Food packaging; Intestinal bacteria; Human colon cell; Toxicity
Funding
- Robert T. Marshall Scholarship
- Nanotechnology Program of USDA National Institute of Food and Agriculture [2016-67021-24994]
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The aims of this work were to synthesize cellulose nanofibril/titanium dioxide nanoparticle (CNF/TiO2NP) nanocomposites, evaluate the use of CNF/TiO2NP nanocomposites in PVA-based films, and investigate the intestinal toxicity of the nanocomposites. Via a mixing method, CNF/TiO2NP nanocomposites were synthesized. The addition of the nanocomposites significantly enhanced the tensile strength, Young's modulus, and light barrier capacity of PVA films. Moreover, a high concentration of CNF/TiO2NP nanocomposites (10 mg/mL) had no appreciable effect on the growth of Escherichia colt P-24, Lactobacillus acidophilus ADEL and Bifidobacterium animalis Bif-6 cells. The nanocomposites did not exhibit significant toxicity to cancerous and normal colon cells even when their concentrations increased to a high level of 1000 mu g/mL. The results indicate that CNF/TiO2NP nanocomposites can potentially be used as functional fillers for a PVA-based packaging system. (C) 2019 Elsevier B.V. All rights reserved.
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