Abstract： The acetochlor capsule suspensions were prepared by in-situ polymerization of urea-formaldehyde resin. The effect of shear speed， core viscosity and agitation speed on particle size and size distribution was characterized by laser particle size analyzer， optical microscope and scanning electron microscope respectively. The results show that during the emulsion process, the addition of toluene with mass fraction of 6.25% can reduce the mean diameter of emulsion effectively by controlling constant shear speed. During the curing stage, the phenomenon of coalescence and rupture of microcapsules can be inhibited effectively by controlling the stirring speed at 600 r/min.

Keywords: acetochlor; capsule suspension; particle size distribution

中图分类号：TQ450.6         文献标志码：A

文章编号：1008-5548（2015）01-0074-04

DOI:10.13732/j.issn.1008-5548.2015.01.016

收稿日期：2014-03-06， 修回日期：2014-03-17，在线出版时间：2015-03-02。

第一作者简介：白文营（1987—），男，硕士研究生，研究方向为缓释农药制剂。 E-mail：baijinlei@126.com

通信作者简介：王岩（1962—），男，副教授，研究方向为新农药创制。E-mail：wy62@163.com。