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- W4378192339 endingPage "121043" @default.
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- W4378192339 abstract "Oleic acid and 10-undecenoic acid were used to esterify corn, tapioca, potato and a waxy potato starch, with a maximum degree of substitution of 2.4 and 1.9 respectively. The thermal and mechanical properties were investigated as a function of the amylopectin content and Mw of starch, and by the fatty acid type. All starch esters had an improved degradation temperature regardless of their botanical origin. While the Tg did increase with increasing amylopectin content and Mw, it decreased with increasing fatty acid chain length. Moreover, films with different optical appearances were obtained by varying the casting temperature. SEM and polarized light microscopy showed that films cast at 20 °C had porous open structures with internal stress, which was absent when cast at higher temperatures. Tensile test measurements revealed that films had a higher Young's modulus when containing starch with a higher Mw and amylopectin content. Besides that, starch oleate films were more ductile than starch 10-undecenoate films. In addition, all films were resistant to water at least up to one month, while some light-induced crosslinking took place. Finally, starch oleate films showed antibacterial properties against Escherichia coli, whereas native starch and starch 10-undecenoate did not." @default.
- W4378192339 created "2023-05-26" @default.
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- W4378192339 date "2023-09-01" @default.
- W4378192339 modified "2023-09-30" @default.
- W4378192339 title "Starch ester film properties: The role of the casting temperature and starch its molecular weight and amylose content" @default.
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- W4378192339 doi "https://doi.org/10.1016/j.carbpol.2023.121043" @default.
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