期刊
FOOD CHEMISTRY
卷 212, 期 -, 页码 453-459出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2016.06.006
关键词
Octenylsuccinate starch; Potato starch; Reaction efficiency; Flowability; Granule size
资金
- National Natural Science Foundation of China [31130042]
- Natural Science Foundation of Guangdong Province, China [2014A030313236]
- Science and Technology Planning Project of Guangdong Province, China [2012NL016, 2013B090500090]
- Fundamental Research Funds for the Central Universities of China [2015ZZ107]
Native potato starch (PS) granules were separated into three size fractions: larger than 30 mu m (P-L), 15-30 mu m (P-M), and smaller than 15 mu m (P-S). The morphological and crystalline structure of fractionated potato starches were investigated by light and scanning electron microscopy (SEM), X-ray diffraction (XRD) and differential scanning calorimetry (DSC). The P-L fraction showed ellipsoidal shape and B-type X-ray pattern, whereas the P-S fraction had spherical shape and A-type pattern. The fluorophore-assisted capillary electrophoresis data showed that the P-L fraction had more B-2 chains and less short A and B-1 chains than the P-S counterparts. Smaller granules with larger specific surface area had higher degree of substitution when reacted with octenylsuccinic anhydride (OSA), and showed more uniform distribution of octenylsuccinate substituents. Both OSA modified and unmodified P-S samples showed higher flowability compared with the P-L counterparts. (C) 2016 Elsevier Ltd. All rights reserved.
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