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Preparation and properties of poly(vinyl alcohol)/chitosan blend bionanocomposites reinforced with cellulose nanocrystals/ZnO-Ag multifunctional nanosized filler

Authors Azizi S, Ahmad MB, Hussein MZ, Ibrahim NA, Namvar F

Received 8 January 2014

Accepted for publication 21 January 2014

Published 23 April 2014 Volume 2014:9(1) Pages 1909—1917

DOI https://doi.org/10.2147/IJN.S60274

Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 4

Susan Azizi,1 Mansor Bin Ahmad,1 Mohd Zobir Hussein,1 Nor Azowa Ibrahim,1 Farideh Namvar2,3

1
Department of Chemistry, Faculty of Science, 2Institute of Tropical Forestry and Forest Products, University Putra Malaysia, Selangor, Malaysia; 3Mashhad Branch, Islamic Azad University, Mashhad, Iran

Abstract: A series of novel bionanocomposites were cast using different contents of zinc oxide-silver nanoparticles (ZnO-AgNPs) stabilized by cellulose nanocrystals (CNC) as multifunctional nanosized fillers in poly(vinyl alcohol)/chitosan (PVA/Cs) matrices. The morphological structure, mechanical properties, ultraviolet-visible absorption, and antimicrobial properties of the prepared films were investigated as a function of their CNC/ZnO-AgNP content and compared with PVA/chitosan/CNC bionanocomposite films. X-ray diffraction and field emission scanning electron microscopic analyses showed that the CNC/ZnO-AgNPs were homogeneously dispersed in the PVA/Cs matrix and the crystallinity increased with increasing nanosized filler content. Compared with pure PVA/Cs, the tensile strength and modulus in the films increased from 0.055 to 0.205 GPa and from 0.395 to 1.20 GPa, respectively. Ultraviolet and visible light can be efficiently absorbed by incorporating ZnO-AgNPs into a PVA/Cs matrix, suggesting that these bionanocomposite films show good visibility and ultraviolet-shielding effects. The bionanocomposite films had excellent antimicrobial properties, killing both Gram-negative Salmonella choleraesuis and Gram-positive Staphylococcus aureus. The enhanced physical properties achieved by incorporating CNC/ZnO-AgNPs could be beneficial in various applications.

Keywords: multifunctional nanofiller, bionanocomposite, cellulose nanocrystals, antimicrobial properties, poly(vinyl alcohol)/chitosan blend

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