期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 103, 期 -, 页码 1257-1264出版社
ELSEVIER
DOI: 10.1016/j.ijbiomac.2017.05.188
关键词
Dialdehyde starch; Corn starch; Acid hydrolysis and oxidation; Sodium periodate; One-step method
资金
- China postdoctoral science foundation [2015M572276]
- Natural Science Foundation of Hunan Province, China [2016JJ3184]
- Youth Science Foundation of Central South University of Forestry and Technology
Dialdehyde starch was prepared by one-step synthesis of acid hydrolysis and oxidation, using corn starch as the raw material, sodium periodate (NaIO4) as the oxidant, and hydrochloric acid (HCl) as the acid solution. The prepared dialdehyde starch was characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), and gel permeation chromatography (GPC). The results confirmed that oxidation occurred between the starch and NaIO4. The acid hydrolysis reaction reduced the molecular weight of starch and effectively improved the aldehyde group contents (92.7%). Scanning electron microscope (SEM) analysis indicated that the average particle size decreased after acid hydrolysis and oxidation reaction. X-ray diffraction (XRD) and thermal gravimetric analyzer (TGA) analysis demonstrated that the crystallinity of the obtained dialdehyde starch showed a downward trend and a decelerated thermal decomposition rate. The starch after acid hydrolysis and oxidation exhibited lower hot paste viscosity and higher reactivity. (C) 2017 Published by Elsevier B.V.
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