莠灭净悬浮剂物理稳定性

通过颗粒平均粒径测定和形貌表征研究了分散剂种类和用量对莠灭净悬浮剂物理稳定性的影响.结果表明,相同条件下,双子型分散剂马来松香聚氧丙烯-氧乙烯醚磺酸盐( SC-3)可以在农药颗粒表面形成双层吸附,产生双层屏蔽结构,有效阻隔了颗粒与水的接触,抑制了颗粒团聚和奥氏熟化引起的结晶长大.其用量(质量分数)大于4.0％时,所制备的莠灭净悬浮剂热贮前后颗粒粒径及形貌基本不变,其结晶长大现象得到有效地抑制,体系物理稳定性较好.

Physical Stability of Ametryne Suspension Concentrate

Effects of dispersants and mass fraction on the physical stability of ametryne suspension concentrate were studied by the average particle size measurement and morphology characterization.The results showed that maleic rosin-polyoxypropylene-polyoxyethylene ether sulfonate(SC-3) formed double-layer adsorption on the surface layer of pesticide,resulting in two-layer static shield system.This system could effectively prevent the particles and water from contacting with each other,inhibiting particle agglomeration and crystal growth by Ostwald ripening.The average particle size and the particle morphology changed little after heat storage due to the restraint of crystal growth.The best physical stability was achieved when the dosage of SC-3 was over 4%.