期刊
ULTRASONICS SONOCHEMISTRY
卷 41, 期 -, 页码 327-336出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ultsonch.2017.09.033
关键词
Starch; Nanoparticles; Ultrasonication
资金
- LabEx Tec 21 (Investissements d'Avenir) [ANR-11-LABX-0030]
- Labex Tec21 (Investissementd'Avenir) [ANR-11-LABX-0033]
- Polynat Carnot Institute (Investissement d'Avenir) [ANR-11-CARN-030-01]
- [ANR-15-IDEX-02]
In this paper, the disintegration of starch (waxy and standard starch) granules into nanosized particles under the sole effect of high power ultrasonication treatment in water/isopropanol is investigated, by using wide methods of analysis. The present work aims at a fully characterization of the starch nanoparticles produced by ultrasonication, in terms of size, morphology and structural properties, and the proposition of a possible mechanism explaining the top-down generation of starch nanoparticles (SNPs) via high intensity ultrasonication. Dynamic light scattering measurements have indicated a leveling of the particle size to about 40 nm after 75 min of ultrasonication. The WAXD, DSC and Raman have revealed the amorphous character of the SNPs. FE-SEM. AFM observations have confirmed the size measured by DLS and suggested that SNPs exhibited 2D morphology of platelet-like shapes. This morphology is further supported by SAXS. On the basis of data collected from the different characterization techniques, a possible mechanism explaining the disintegration process of starch granules into NPs is proposed.
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