Properties of low methoxyl pectin-carboxymethyl cellulose based on montmorillonite nanocomposite films

Authors

  • Wen-Xi Yu,

    1. Department of Packaging Engineering, Jiangnan University, Wuxi, China
    2. Key Laboratory of Product Packaging and Logistics of Guangdong Higher Education Institutes, Jinan University, Zhuhai, China
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  • Zhi-Wei Wang,

    Corresponding author
    1. Department of Packaging Engineering, Jiangnan University, Wuxi, China
    2. Key Laboratory of Product Packaging and Logistics of Guangdong Higher Education Institutes, Jinan University, Zhuhai, China
    3. Packaging Engineering Institute, Jinan University, Zhuhai, China
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  • Chang-Ying Hu,

    1. Key Laboratory of Product Packaging and Logistics of Guangdong Higher Education Institutes, Jinan University, Zhuhai, China
    2. Department of Food Science and Engineering, Jinan University, Guangzhou, China
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  • Lei Wang

    1. Key Laboratory of Product Packaging and Logistics of Guangdong Higher Education Institutes, Jinan University, Zhuhai, China
    2. Packaging Engineering Institute, Jinan University, Zhuhai, China
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Summary

In this study, the low methoxyl pectin-carboxymethyl cellulose-based montmorillonite (LMP-CMC-MMT, LCM) nanocomposite films with nine ratios of LMP:CMC (from 10:0 to 0:10) and different MMT contents (1–8 wt%) were prepared. The mechanical properties, colour, opacity and water vapour permeability (WVP) of composite films were investigated. The maximum of tensile strength (TS) of composite films was 39.85 ± 2.51 MPa at LMP:CMC ratio of 4:6 and 4 wt% MMT (LCM47), which indicated the formation of hydrogen bonds between MMT and LMP-CMC. The reduction of WVP of the LCM47 composite film was 333% of that of the CMC film due to the tortuous path caused by MMT incorporation. LCM composite films had the higher b*- and ΔE*-values and lower L*-values in comparison with LMP-CMC (LC) composite films. The LCM composite films showed a decrease in transparency as MMT content increased.

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