采用湿法介质研磨技术构建吡虫啉纳米棒提高叶面利用率

Construction of Imidacloprid Nanorods by Wet Milling for Improving Pesticide Foliar Utilization

[目的]制备一种具有高叶面利用率的吡虫啉纳米棒。[方法]采用湿法介质研磨结合正交试验设计制备吡虫啉纳米棒,通过粒径、Zeta电位以及扫描电镜对吡虫啉纳米棒进行表征观察,并通过测定表面张力、接触角以及滞留量对吡虫啉纳米棒进行润湿性评价。[结果]吡虫啉纳米剂型呈棒状结构,平均尺寸为289 nm,Zeta电势为-39.3 mV。纳米棒的表面张力和接触角远低于市售水分散粒剂,且滞留量较高。[结论]与市售剂型相比,吡虫啉纳米棒具有更好的润湿性、滞留性和叶面利用率。

[Aims] This study aims to prepare imidacloprid nanorods with high foliar utilization. [Methods] Imidacloprid nanorods were prepared by wet milling method combined with orthogonal experiment design. The size, Zeta potential and scanning electron microscopy were used to characterize and observe the imidacloprid nanorods. The wettability of the imidacloprid nanorods was evaluated by measuring the surface tension, contact angle and retention. [Results] The imidacloprid nanorods showed rod structure with an average size of 289 nm and the Zeta potential of -39.3 mV. The surface tension and contact angles of nanorods were much lower than that of commercial water dispersible granules,and the retention was higher. [Conclusions] Compared with commercial formulations, imidacloprid nanorods had better wettability, retention and foliar utilization.