Influence of Nano Titanium Dioxide and Clove Oil on Chitosan-Starch Film Characteristics.

Wei Li,Kewang Zheng,Caiqin Qin,Wei Wang,Hujian Chen,Shirong Feng

doi:10.3390/polym11091418

Wei Li, Kewang Zheng + Show 4 more

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https://doi.org/10.3390/polym11091418

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Journal: Polymers	Publication Date: Aug 29, 2019
Citations: 43	License type: CC BY 4.0

Affiliation: Hubei Engineering University, Wuhan University

Abstract

The combined effects of nano titanium dioxide (TiO2-N) and clove oil (CO) on the physico-chemical, biological and structural properties of chitosan (CH)/starch (ST) films were investigated by using a solvent casting method. Results indicated that the incorporation of TiO2-N could improve the compactness of the film, increase the tensile strength (TS) and antioxidant activity, and decrease the water vapour permeability (WVP). As may be expected, the incorporation of CO into the film matrix decreased TS but increased the hydrophobicity as well as water vapour barrier antimicrobial and antioxidant properties. Fourier-transform infrared spectroscopy (FTIR) data supported intermolecular interactions between TiO2-N, CO and the film matrix. Use of a scanning electron microscope (SEM) showed that TiO2-N and CO were well dispersed and emulsified in the film network. Thermogravimetric (TG) and derivative thermogravimetric (DTG) curves demonstrated that TiO2-N and CO were well embedded in the film matrix, hence this blend film system could provide new formulation options for food packaging materials in the future.

Highlights

In the past decades, the use of synthetic packaging materials, such as polyethylene terephthalate (PET), polyethylene (PE) and polypropylene (PP), has become increasingly popular worldwide.Despite synthetic packaging materials having good physico-chemical properties and a low cost, they have caused significant environmental pollution due to their non-biodegradable and unrecyclable nature
With the addition of TiO22-N, the2 physico-chemical and antimicrobial properties of the sample sample increased, but the transparency decreased which suggested that the density of the film had increased, but the transparency decreased which suggested that the density of the film had been increased
Results of this work indicated that a good compatibility could be obtained between TiO22-N, Clove oil (CO) and the film matrix

Summary

Introduction

The use of synthetic packaging materials, such as polyethylene terephthalate (PET), polyethylene (PE) and polypropylene (PP), has become increasingly popular worldwide. Despite synthetic packaging materials having good physico-chemical properties and a low cost, they have caused significant environmental pollution due to their non-biodegradable and unrecyclable nature. The development of eco-friendly packaging materials is necessary [1,2]. Eco-friendly packaging materials usually include biodegradable films and coatings, which are based on bio-polymers (carbohydrates, proteins and lipids), additives and functional ingredients [3,4]. Among bio-polymers, chitosan and starch have been the focus of current research due to their biodegradability, good film-forming capacity, edibility and natural availability [5,6,7,8,9]

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