College of Food Science and Engineering , Qingdao Agricultural University , Qingdao , Shandong Province 266109 , China.
Zhucheng Xingmao Corn Developing Co., Ltd , Weifang , Shandong Province 262200 , China.
J Agric Food Chem. 2019 Mar 13;67(10):2906-2915. doi: 10.1021/acs.jafc.8b05045. Epub 2019 Feb 27.
The functional modifications of debranched starch (DBS) has been attracting the interest of researchers. This study marks the first time that DBS was modified by cationization through the use of (3-chloro-2-hydroxypropyl) trimethylammonium chloride with the introduction of cationic functional groups. The physicochemical properties and structural characteristics of cationized debranched starch (CDBS) were systematically assessed. The results demonstrate that the maximum degree of substitution (DS) value obtained was as high as 1.14, and the corresponding CDBS exhibited significantly higher zeta potential values: approximately +35 mV. The minimal inhibitory concentration values of the CDBS of DS 1.14 against Escherichia coli and Staphylococcus aureus were 6 and 8 mg mL, respectively. In addition, nanoparticles were successfully prepared with a combination of CDBS and low methoxyl pectin (LMP) and a combination of CDBS and κ-carrageenan (CRG). The maximum encapsulation efficiency of nanoparticles for (-)-epigallocatechingallate can reach 87.8%.
支链淀粉（DBS）的功能修饰一直吸引着研究人员的兴趣。本研究首次通过使用（3-氯-2-羟丙基）三甲基氯化铵将支链淀粉阳离子化，引入了阳离子官能团。系统评估了阳离子化支链淀粉（CDBS）的物理化学性质和结构特征。结果表明，获得的最大取代度（DS）值高达 1.14，相应的 CDBS 表现出明显更高的 Zeta 电位值：约+35 mV。DS 为 1.14 的 CDBS 对大肠杆菌和金黄色葡萄球菌的最小抑菌浓度值分别为 6 和 8 mg/mL。此外，成功地制备了由 CDBS 和低甲氧基果胶（LMP）以及 CDBS 和 κ-卡拉胶（CRG）组成的纳米颗粒。（-）-表没食子儿茶素没食子酸酯纳米颗粒的最大包封效率可达到 87.8%。
