聚合物分散剂对氟虫脲水悬浮剂分散稳定性的影响

高等学校化学学报 ›› 2010, Vol. 31 ›› Issue (7): 1386.

聚合物分散剂对氟虫脲水悬浮剂分散稳定性的影响

冯建国, 路福绥, 陈甜甜, 张树芹, 李慧

山东农业大学化学与材料科学学院, 泰安 271018

收稿日期:2010-01-27 出版日期:2010-07-10 发布日期:2010-07-10
通讯作者: 路福绥, 男, 教授, 博士生导师, 主要从事物理化学及其应用研究. E-mail: lfs@sdau.edu.cn
基金资助:
山东省自然科学基金(批准号： ZR2009DM032)资助.

Effect of Copolymer Dispersant on the Dispersion Stability of Flufenoxuron Suspension Concentrate

FENG Jian-Guo, LU Fu-Sui*, CHEN Tian-Tian, ZHANG Shu-Qin, LI Hui

College of Chemistry and Materials Science of Shandong Agricultural University, Taian 271018, China

Received:2010-01-27 Online:2010-07-10 Published:2010-07-10
Contact: LU Fu-Sui. E-mail: lfs@sdau.edu.cn
Supported by:
山东省自然科学基金(批准号： ZR2009DM032)资助.

摘要/Abstract

摘要：

通过测定药物颗粒界面Zeta电位和平均粒径, 研究了聚合物分散剂苯乙烯磺酸聚合物钠盐(GY-D08)用量、pH和盐离子对氟虫脲水悬浮剂分散稳定性的影响, 研究结果表明, 分散剂GY-D08的加入量与水悬浮剂分散效果密切相关, 制备质量分数为5%氟虫脲水悬浮剂的GY-D08最佳用量为2%, GY-D08用量过多或过少都会使分散效果下降; pH影响分散剂GY-D08在水中的电离能力, 当pH=9时, GY-D08分子完全电离, 能为颗粒提供较大的静电位阻, 水悬浮剂分散稳定性最好; Mg²⁺或Ca²⁺压缩颗粒界面的双电层, 降低Zeta电位, 使颗粒因带电量减少而聚结, 导致水悬浮剂分散稳定性变差, 且Mg²⁺或Ca²⁺浓度愈大, 其分散稳定性愈差; 当离子浓度相同时, Ca²⁺压缩双电层的能力比Mg²⁺强, 添加Ca²⁺后的水悬浮剂的分散稳定性更差.

关键词: 氟虫脲; 水悬浮剂; 聚合物分散剂; Zeta电位; 平均粒径; 分散稳定性

Abstract:

The effects of the mass fraction of GY-D08, pH value and inorganic ions on the dispersion stability of flufenoxuron suspension concentrate were studied by means of measuring zeta potential and average size analysis. The dispersion stability of suspension concentrate was closely related to the mass fraction of GY-D08; the optimum mass fraction of GY-D08 was 2%(mass fraction) when preparing 5%(mass fraction) flufenoxuron suspension concentrate with GY-D08; the dispersion stability would be worse on condition that GY-D08 was overfull or lacking. pH affected the ionization of GY-D08 in water, at the pH value of 9 the dispersion stability of suspension concentrate was best on account of strong electrostatic exclusion and steric hindrance which was provided by completely ionizing of the molecules. Mg²⁺ or Ca²⁺ was able to decrease Zeta potential by compressing the electronic double layer thickness of particles surface, which could lead to particles aggregation due to the reduction of electric quantity and ultimately make the dispersive effect of suspension concentrate worse, then the higher the content of Mg²⁺ or Ca²⁺ was, the worse the dispersion stability of flufenoxuron suspension concentrate was. If the ions concentration were the same, the capacity of compressing the electronic double layer thickness of particles surface by Ca²⁺ was stronger than Mg²⁺, the dispersion stability of suspension were worse after adding Ca²⁺.

Key words: Flufenoxuron; Suspension concentrate; Copolymer dispersant; Zeta potential; Average size; Dispersion stability

TrendMD:

冯建国, 路福绥, 陈甜甜, 张树芹, 李慧. 聚合物分散剂对氟虫脲水悬浮剂分散稳定性的影响. 高等学校化学学报, 2010, 31(7): 1386.

FENG Jian-Guo, LU Fu-Sui*, CHEN Tian-Tian, ZHANG Shu-Qin, LI Hui. Effect of Copolymer Dispersant on the Dispersion Stability of Flufenoxuron Suspension Concentrate. Chem. J. Chinese Universities, 2010, 31(7): 1386.

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