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Study on Biodegradable Starch/OMMT Nanocomposites for Packaging Applications

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Abstract

The thermoplastic starch (TPS) and nanocomposite(TPS/OMMT) was prepared with 15% carbamide, 15% ethanolamine and different contents of organic activated montmorillonite (OMMT) by twin-screw extruder with a 130 °C barrel temperature. Fourier transforms infrared spectroscopy and wide angle X-ray diffraction shown that the alkylamine in dodecyl benzyl dimethyl ammonium bromide could react with MMT via cation exchange reaction. After treated, the d(001)space distance of MMT increased from 1.5 to 1.7 nm. Scanning electron microscope revealed that the lower contents of OMMT could disperse well in the matrixes of TPS. The carbamide, ethanolamine and the OMMT could destroy the crystallization behavior of starch, but only the OMMT restrained this behavior for long-term storing. Mechanical properties investigation indicated that the tensile strength and modulus of TPS/OMMT nanocomposites were better than those of TPS, while the elongation at break was descended with the increasing of OMMT contents. When the content of OMMT was 4%, the tensile strength and modulus of TPS was improved from 4.2 and 42 MPa to 6.0 and 76 MPa, respectively.

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Acknowledgements

This work was supported by department of education of Shaanxi province, China (07JK343).

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Authors and Affiliations

  1. Institute of Printing and Packaging Engineering, Xi’an University of Technology, Xi’an, Shaanxi, 710048, People’s Republic of China

    Penggang Ren, Tingting Shen, Fang Wang, Xing Wang & Zhengwei Zhang

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  1. Penggang Ren
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  2. Tingting Shen
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  3. Fang Wang
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  4. Xing Wang
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  5. Zhengwei Zhang
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Correspondence to Penggang Ren.

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Ren, P., Shen, T., Wang, F. et al. Study on Biodegradable Starch/OMMT Nanocomposites for Packaging Applications. J Polym Environ 17, 203–207 (2009). https://doi.org/10.1007/s10924-009-0139-6

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  • DOI: https://doi.org/10.1007/s10924-009-0139-6

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