Abstract
Herein, we described novel biogenic preparation of the CuO nanorods and its surface modification with l-alanine amino acid accelerated by microwave irradiation. The effect of surface functionalized CuO nanorods on the physico-mechanical properties of polyvinyl alcohol/carboxymethyl cellulose films were investigated through various characterization techniques. The tensile strength was improved from 28.58 ± 0.73 to 43.40 ± 0.93 MPa, UV shielding ability and barrier to the water vapors were highly enhanced when PVA/CMC matrices filled with 8 wt% of CuO-l-alanine. In addition, the prepared films exhibited acceptable overall migration limit and readily undergoes soil burial degradation. Nevertheless, CuO-l-alanine incorporated films showed potent antioxidant activity against DPPH radicals and had high antibacterial activity against Staphylococcus aureus and Escherichia coli, and antifungal activity against Candida albicans and Candida tropicalis. Furthermore, the nanocomposite films showed negligible cytotoxic effect on HEK293 and Caco-2 cell lines. In these contexts, the developed nanocomposite films can be implementing as an active food packaging material.
Highlights
The environmental impact on the solid waste from petroleum-based packaging materials can be overcome by replacement of biodegradable polymer materials [1]
Several research teams have reported the great potential of CuO nanostructure for enhancing PVA/CMC blend performance in terms of mechanical, thermal, and barrier properties leading to the production of greener nanocomposites [16]
For the first time we have reported CuO nanorods required for the composite film preparation using novel greener route employing water extract of mango peel ash (WEMPA) is described
Summary
The environmental impact on the solid waste from petroleum-based packaging materials can be overcome by replacement of biodegradable polymer materials [1]. PVA (polyvinyl alcohol) is a highly biocompatible and nontoxic synthetic polymer with high water solubility due to the hydroxyl group, and it has been used in food, membrane, medicine, and other materials manufacturing These wider applications prompted material scientist to exploit further by designing novel composite materials [3]. PVA is flammable and quickly ignited, it is important to improve the PVA's flame retardancy as well as mechanical qualities for various application, including textiles, furniture, adhesives, and packaging materials[3] To overcome this limitation, researchers described alternative technique involving blending of PVA with other polymers derived from natural or synthetic such as chitosan [4], polycaprolactone [5], PLA [6], starch [7], PVA and CMC [8]. In vitro cytotoxicity, antibacterial, antifungal, and antioxidant properties were investigated
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