壳聚糖
硒
化学
纳米颗粒
抗坏血酸
抗氧化剂
化学工程
分子质量
核化学
纳米技术
酶
材料科学
有机化学
食品科学
工程类
作者
Chunyue Zhang,Xiaona Zhai,Guanghua Zhao,Fazheng Ren,Xiaojing Leng
标识
DOI:10.1016/j.carbpol.2015.07.065
摘要
Chitosan-stabilized selenium nanoparticles (SeNPs) have been reported, but there is no information on the effect of the chitosan molecular weight on the structure, stability, and selenium release properties of the SeNPs. Herein, we compared the uniform Se(0) spherical nanoparticles prepared through the reduction of seleninic acid with ascorbic acid in the presence of chitosan with different molecular weights (Mws). We found that both low and high molecular weight chitosan-stabilized selenium nanoparticles exhibited core-shell microstructures with a size of about 103 nm after 30 days growing through the "bottom-up approach" and "top-down approach," respectively. Moreover, both chitosan SeNPs processed excellent stability towards pH and enzyme treatment. In contrast, selenium was easily released to different extents from these two chitosan SeNPs upon treatment with different free radicals. This makes these materials potentially useful as oral antioxidant supplements.
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