Plant Soil Environ., 2012, 58(8):354-359 | DOI: 10.17221/287/2012-PSE

Composites containing acetylated wheat B-starch for agriculture applications

E. Šárka1, Z. Kruliš2, J. Kotek2, L. Růžek3, K. Voříšek3, J. Koláček1, K. Hrušková1, M. Růžková4, O. Ekrt5
1 Department of Carbohydrates and Cereals, Faculty of Food and Biochemical Technology, Institute of Chemical Technology Prague, Prague, Czech Republic
2 Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Prague, Czech Republic
3 Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, Czech Republic
4 Central Institute for Supervising and Testing in Agriculture, Brno, Czech Republic
5 Department of Physics and Measurements, Faculty of Chemical Engineering, Institute of Chemical Technology Prague, Prague, Czech Republic

Native and acetylated B-starch was used in biodegradable films after blending with either poly-(ε-caprolactone) (PCL) or ethylene vinyl acetate copolymer (EVA). The following mechanical characteristics of prepared films were derived from the stress-strain curves: Young modulus, yield stress, stress-at-break and strain-at-break. Acetylation of starch molecules in the composites reduced the degradation rate in compost. Optical microscopy, combined with the image analysis system NIS-Elements completed with extended depth of focus (EDF) module, was used to study the PCL/starch and EVA/starch films surface morphology during composting. Parameters of the compost used for film exposition were measured.

Keywords: biodegradable plastic; polycaprolactone; ethylene vinyl acetate copolymer; image analysis; green waste compost

Published: August 31, 2012  Show citation

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Šárka E, Kruliš Z, Kotek J, Růžek L, Voříšek K, Koláček J, et al.. Composites containing acetylated wheat B-starch for agriculture applications. Plant Soil Environ. 2012;58(8):354-359. doi: 10.17221/287/2012-PSE.
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