文献类型： 外文期刊

作者： Cao, Lidong ¹ ; Zhou, Zhaolu ¹ ; Niu, Shujun ² ; Cao, Chong ¹ ; Li, Xiuhuan ¹ ; Shan, Yongpan ¹ ; Huang, Qiliang ¹ ;

作者机构： 1.Chinese Acad Agr Sci, Key Lab Integrated Pest Management Crops, Minist Agr, Inst Plant Protect, 2 Yuanmingyuan West Rd, Beijing 100193, Peoples R China

2.Gansu Acad Agr Sci, Inst Plant Protect, 1 Nongkeyuan New Village, Lanzhou 730070, Gansu, Peoples R China

关键词： mesoporous silica nanoparticles; 2,4-D sodium salt; electrostatic interaction; controlled release; soil leaching; bioactivity

期刊名称：JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY （ 影响因子：5.279； 五年影响因子：5.269 ）

ISSN： 0021-8561

年卷期： 2018 年 66 卷 26 期

页码：

收录情况： SCI

摘要： Because of its relatively high water solubility and mobility, 2,4-dichlorophenoxy acetic acid (2,4-D) has a high leaching potential threatening the surface water and groundwater. Controlled release formulations of 2,4-D could alleviate the adverse effects on the environment. In the present study, positive-charge functionalized mesoporous silica nanoparticles (MSNs) were facilely synthesized by incorporating trimethylammonium (TA) groups onto MSNs via a postgrafting method. 2,4-D sodium salt, the anionic form of 2,4-D, was effectively loaded into these positively charged MSN-TA nanoparticles. The loading content can be greatly improved to 21.7% compared to using bare MSNs as a single encapsulant (1.5%). Pesticide loading and release patterns were pH, ionic strength and temperature responsive, which were mainly dominated by the electrostatic interactions. Soil column experiments clearly demonstrated that MSN TA can decrease the soil leaching of 2, 4-D sodium salt. Moreover, this novel nanoformulation showed good bioactivity on target plant without adverse effects on the growth of nontarget plant. This strategy based on electrostatic interactions could be widely applied to charge carrying agrochemicals using carriers bearing opposite charges to alleviate the potential adverse effects on the environment.