Application of wheat B-starch in biodegradable plastic materials

0360781 - ÚMCH 2012 RIV CZ eng J - Článek v odborném periodiku
Šárka, E. - Kruliš, Zdeněk - Kotek, Jiří - Růžek, L. - Korbářová, A. - Bubník, Z. - Růžková, M.
Application of wheat B-starch in biodegradable plastic materials.
Czech Journal of Food Sciences. Roč. 29, č. 3 (2011), s. 232-242. ISSN 1212-1800. E-ISSN 1805-9317
Grant CEP: GA ČR GA525/09/0607
Výzkumný záměr: CEZ:AV0Z40500505
Klíčová slova: biodegradable plastic * polycaprolactone * B-starch
Kód oboru RIV: JI - Kompozitní materiály
Impakt faktor: 0.522, rok: 2011
http://www.agriculturejournals.cz/publicFiles/39918.pdf

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). Mechanical characteristics (Young modulus, yield stress, stress-at-break) were determined on the produced films. Water absorption of PCL/starch (60/40) films was determined according to standard ISO 62. 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.
Trvalý link: http://hdl.handle.net/11104/0198250