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Application of wheat B-starch in biodegradable plastic materials

Author

Listed:
  • Evžen Šárka

    (Department of Carbohydrate Chemistry and Technology, Faculty of Food and Biochemical Technology, Institute of Chemical Technology in Prague, Prague, Czech Republic)

  • Zdeněk Kruliš

    (Institute of Macromolecular Chemistry AS CR, Prague, Czech Republic)

  • Jiří Kotek

    (Institute of Macromolecular Chemistry AS CR, Prague, Czech Republic)

  • Lubomír Růžek

    (Department of Microbiology, Nutrition and Dietetics, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, Czech Republic)

  • Anna Korbářová

    (Department of Physics, Faculty of Chemical Engineering, Institute of Chemical Technology in Prague, Prague, Czech Republic)

  • Zdeněk Bubník

    (Department of Carbohydrate Chemistry and Technology, Faculty of Food and Biochemical Technology, Institute of Chemical Technology in Prague, Prague, Czech Republic)

  • Michaela Růžková

    (Central Institute for Supervising and Testing in Agriculture, Brno, Czech Republic)

Abstract

Food application of wheat B-starch comprising small starch granules as a result of lower quality is problematic. Accordingly, B-starch or acetylated starch prepared from it, with the degree of substitution (DS) of 1.5-2.3, was used in biodegradable films after blending with poly-(ε-caprolactone) (PCL). The following mechanical characteristics of the produced films were derived from the stress-strain curves: Young modulus, yield stress, stress-at-break, and strain-at-break. Water absorption of PCL/starch (60/40) films was determined according to European standard ISO 62. The measured data were compared with those of commercial A-starch. The films containing native starch degraded in compost totally during 2 months. Acetylation of starch molecules in the composites reduced the degradation rate. Optical microscopy, in combination with the image analysis system NIS-Elements vs. 2.10 completed with an Extended Depth of Focus (EDF) module, was used to study the surface morphology of PCL/starch films after 20-day and 42-day compost incubation. Chemical changes in the compost used for the film exposition were measured.

Suggested Citation

  • Evžen Šárka & Zdeněk Kruliš & Jiří Kotek & Lubomír Růžek & Anna Korbářová & Zdeněk Bubník & Michaela Růžková, 2011. "Application of wheat B-starch in biodegradable plastic materials," Czech Journal of Food Sciences, Czech Academy of Agricultural Sciences, vol. 29(3), pages 232-242.
    • Handle: RePEc:caa:jnlcjf:v:29:y:2011:i:3:id:292-2010-cjfs
    DOI: 10.17221/292/2010-CJFS
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    References listed on IDEAS

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    1. Daniela Mikulíková & Štefan Masár & Viera Horváthová & Ján Kraic, 2009. "Stability of quality traits in winter wheat cultivars," Czech Journal of Food Sciences, Czech Academy of Agricultural Sciences, vol. 27(6), pages 403-417.
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    Cited by:

    1. L. Růžek & M. Růžková & M. Koudela & L. Bečková & D. Bečka & Z. Kruliš & E. Šárka & K. Voříšek & Š. Ledvina & B. Šalounová & J. Venyercsanová, 2015. "Biodegradation of composites based on maltodextrin and wheat B-starch in compost," Horticultural Science, Czech Academy of Agricultural Sciences, vol. 42(4), pages 209-214.
    2. E. Šárka & Z. Kruliš & J. Kotek & L. Růžek & K. Voříšek & J. Koláček & K. Hrušková & M. Růžková & O. Ekrt, 2012. "Composites containing acetylated wheat B-starch for agriculture applications," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 58(8), pages 354-359.

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