Preparation and characterization of dialdehyde starch by one-step acid hydrolysis and oxidation
[Display omitted] •Dialdehyde starch was prepared by a one-step method using NaIO4 and HCl.•XPS indicates the proportion of functional groups in the dialdehyde starch.•The molecular weight of starch decreased by a one-step method using NaIO4 and HCl.•The solid content of adhesive using ATDS increase...
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Veröffentlicht in: | International journal of biological macromolecules 2017-10, Vol.103, p.1257-1264 |
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Format: | Artikel |
Sprache: | eng |
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•Dialdehyde starch was prepared by a one-step method using NaIO4 and HCl.•XPS indicates the proportion of functional groups in the dialdehyde starch.•The molecular weight of starch decreased by a one-step method using NaIO4 and HCl.•The solid content of adhesive using ATDS increased about 30%.•The curing time of adhesive was shortened as the ATDS was added.
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. |
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ISSN: | 0141-8130 1879-0003 |
DOI: | 10.1016/j.ijbiomac.2017.05.188 |