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

Chem. J. Chinese Universities ›› 2010, Vol. 31 ›› Issue (7): 1386.

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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.

Abstract

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

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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[J]. Chem. J. Chinese Universities, 2010, 31(7): 1386.

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

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