Wheat B-Starch: Application in Biodegradable Films

Autor:	Evzen Sarka, Zdenek Krulis, Michaela Ruzkova, Jaroslav Kolacek, Katerina Hruskova, Jiri Kotek, Lubomir Ruzek
Rok vydání:	2012
Předmět:	chemistry.chemical_classification Compost Starch food and beverages Ethylene-vinyl acetate Polymer engineering.material Food packaging chemistry.chemical_compound chemistry Chemical engineering Polycaprolactone engineering Copolymer Biodegradable plastic
Zdroj:	Journal of Agricultural Science and Applications. :45-48
ISSN:	2227-6483 2227-6475
DOI:	10.14511/jasa.2012.010202
Popis:	Compared to other cereal or tuber starches, wheat starch has mainly two different types of granules, the so-called “A-starch” and “B-starch”, which are refined into two parts during starch processing. The food application of wheat B-starch comprising small starch granules, as a result of lower quality, is problematic. B-starch or acetylated starch prepared from that material, with a degree of substitution (DS) of 1.5 – 2.0, was used in biodegradable films after blending with either poly-(ecaprolactone) (PCL) or ethylene vinyl acetate copolymer (EVA). End-use properties of PCL or EVA/B-starch and PCL or EVA/acetylated B-starch blends were suitable for film production. The films containing wheat B-starch became totally degraded in compost over a period of 2 months. Acetylation of starch molecules in the composites reduced the degradation rate. Chemical changes in the compost used for film exposition were measured. Keywords-B-Starch; Wheat Starch; Biodegradable Plastic; Polycaprolactone; EVA Copolymer
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::0f3a7f6ed8a0a53e7ad98240383c7a61 https://doi.org/10.14511/jasa.2012.010202 Zobrazit plný text záznamu