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[目的]优化壁材与芯材质量比m(S/C),以制备包封率与形貌优良的乙草胺微囊悬浮剂。[方法]以原位聚合法制备脲醛树脂基乙草胺微囊悬浮剂,并利用UV-2450、激光粒度仪、FT-IR及SEM等研究m(S/C)对产品包封率及形貌的影响。[结果]当m(S/C)≤0.75时,包封率与其呈正相关,并且随着m(S/C)的增加,微囊平均粒径逐渐增大;当m(S/C)≥0.75,微囊表面逐渐由光滑向粗糙转变。[结论]选择m(S/C)=0.75,有助于制备包封率较高、形貌良好的乙草胺微囊悬浮剂。
[Objective] The purpose was to optimize mass ratio m (S / C) between wall material and core material to prepare acetochlor microcapsule suspension with good encapsulation efficiency and morphology. [Method] The urea-formaldehyde resin-based acetochlor microcapsule suspension was prepared by in-situ polymerization. The effects of m (S / C) on the encapsulation efficiency and the shape of the product were studied by UV-2450, laser particle size analyzer, FT- Appearance effect. [Result] The entrapment efficiency was positively correlated with m (S / C) ≤ 0.75, and the average diameter of microcapsules increased with the increase of m (S / C) 0.75, the microcapsule surface gradually changes from smooth to rough. [Conclusion] The selection of m (S / C) = 0.75 could be helpful to prepare acetochlor microcapsule suspensions with high encapsulation efficiency and good morphology.