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
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).
引用
收藏
页码:13406 / 13411
页数:6
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