Preparation and Physicochemical Characteristics of Thermo-Responsive Emamectin BenzoateMicrocapsules

文献类型： 外文期刊

第一作者： Shen, Yue

作者： Shen, Yue;Wang, Yan;Zhao, Xiang;Sun, Changjiao;Cui, Bo;Gao, Fei;Zeng, Zhanghua;Cui, Haixin

作者机构：

关键词： polydopamine;poly(N-isopropylacrylamide);thermo-responsive;microcapsule;controlled-release

期刊名称：POLYMERS （ 影响因子：4.329； 五年影响因子：4.493 ）

ISSN： 2073-4360

年卷期： 2017 年 9 卷 9 期

页码：

收录情况： SCI

摘要： Thermo-responsive release emamectin benzoate microcapsules were successfully prepared with a polydopamine (PDA)-g-poly(N-isopropylacrylamide) (PNIPAm) multifunctional layer. Preparation of emamectin benzoate microcapsules was first studied by emulsion interfacial-polymerization using PDA as a wall material. Then the amino-terminated PNIPAm was grafted on the PDA layer by its amino group in aqueous solution. Physicochemical characterization of microcapsules was obtained by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and dynamic light scattering (DLS). Kinetic study of emamectin benzoate release showed that the microcapsules exhibit sustained- and controlled-release properties. The multifunctional layer can release emamectin benzoate easily when the temperature was below the lower critical solution temperature (LCST). In contrast, when the temperature increased above the LCST, the release rate was reduced. The results indicated that these microcapsules with excellent thermo-sensitivity would be promising in the research field of pesticide microcapsules.

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