共 25 条
Facile preparation of corn starch nanoparticles by alkali-freezing treatment
被引:14
作者:
Zhang, Zhe
[1
]
Shan, Hongling
[1
]
Sun, Jingru
[2
]
Weng, Yun
[1
]
Wang, Xiu
[1
]
Xiong, Jie
[1
]
Chen, Li
[1
]
Chen, Xuesi
[2
]
机构:
[1] NE Normal Univ, Dept Chem, Changchun 130024, Peoples R China
[2] Chinese Acad Sci, Changchun Inst Appl Chem, Changchun 130022, Peoples R China
来源:
基金:
中国国家自然科学基金;
关键词:
NANOCRYSTALS;
CELLULOSE;
FABRICATION;
SOLUBILITY;
D O I:
10.1039/c3ra41610k
中图分类号:
O6 [化学];
学科分类号:
0703 ;
摘要:
In this article a facile way of producing starch-based nanoparticles (SNPs) with high yields and predictable size by an alkali-freezing treatment is presented. A new mix solvent, sodium hydroxide-urea aqueous solution, has been developed to disperse corn starch. After refreezing, thawing, stirring at room temperature and dialysis, resultant aqueous suspensions of SNPs are obtained and characterized using a scanning electron microscope (SEM) and dynamic light scattering (DLS) to learn the particle morphology, mean size and size distribution. By adjusting parameters such as the sodium hydroxide : urea ratio and temperature, the size of particles can be controlled from micro-to nanometer. Furthermore, this process that leads to the nanoparticles causes no changes in the structures of the starch granules as characterized by IR or H-1-NMR. Freeze-dried SNPs were found to be amorphous as revealed by wide-angle X-ray diffraction (WAXD).
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页码:13406 / 13411
页数:6
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