Photochemical Reactions in Dialdehyde Starch

被引：32

作者：

Ziegler-Borowska, Marta ^{[1
]}

Wegrzynowska-Drzymalska, Katarzyna ^{[1
]}

Chelminiak-Dudkiewicz, Dorota ^{[1
]}

Kowalonek, Jolanta ^{[1
]}

Kaczmarek, Halina ^{[1
]}

机构：

[1] Nicolaus Copernicus Univ Torun, Fac Chem, Gagarina 7, PL-87100 Torun, Poland

来源：

MOLECULES | 2018年 / 23卷 / 12期

关键词：

starch modification; dialdehyde starch (DAS); cross-linkers; UV-irradiation; surface properties; PHYSICOCHEMICAL PROPERTIES; SURFACE; RADIATION; CASSAVA; FILMS;

D O I：

10.3390/molecules23123358

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

In this study potato and corn starch were subjected to oxidation, using sodium periodate, to obtain dialdehyde starch (DAS) containing different amount of aldehyde groups. The obtained modified starch samples have been characterized with chemical analysis, scanning electron microscopy (SEM) and ATR-FTIR spectroscopy. Then, the samples were exposed to polychromatic UV radiation and the course of photochemical reaction has been monitored with ATR-FTIR spectroscopy. The surface properties of the native and dialdehyde starch before and after UV-irradiation have been determined by contact angle measurements and calculation of surface free energy. The crystallinity of the samples has been estimated with X-ray diffraction (XRD). It has been proved that the dialdehyded corn starch contained a higher amount of functional groups was more photostable than the oxidized potato starch. Sodium iodide(V), firmly bound to DAS macromolecules, has been found to have a significant effect on the photooxidative degradation of the tested systems. In addition, the mechanism of photoinduced reactions in the dialdehyde starch has been proposed.

引用

页数：20

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