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莠灭净悬浮剂物理稳定性

李慧,路福绥*,王祜英,翟利利,李秀丽   

  1. (山东农业大学化学与材料科学学院 泰安 271018)
  • 收稿日期:2011-04-18 修回日期:2011-07-18 出版日期:2012-03-10 发布日期:2012-03-10
  • 通讯作者: 路福绥，教授; Tel:0538-8213980; Fax:0538-8242251; E-mail:lfs@sdau.edu.cn; 研究方向：应用胶体化学
  • 作者简介:
  • 基金资助:
    山东省自然科学基金资助项目（ZR2009DM032）

Physical Stability of Ametryne Suspension Concentrate

LI Hui, LU Fusui*, WANG Huying, ZHAI Lili, LI Xiuli   

  1. (College of Chemistry and Materials Science,Shandong Agricultural University,Tai′an 271018)
  • Received:2011-04-18 Revised:2011-07-18 Published:2012-03-10 Online:2012-03-10
  • Contact: LU Fusui

PDF

11328

被引次数

12 | 2

摘要： 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。

关键词: 莠灭净, 悬浮剂, 平均粒径, 奥氏熟化, 稳定性

Abstract: 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%.

Key words: ametryne, suspension concentrate, average particle size, Ostwald ripening, Stability

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