Adsorption Properties of MOTAS Dispersant on the Interface of Hexaflumuron Particles

Chem. J. Chinese Universities

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Adsorption Properties of MOTAS Dispersant on the Interface of Hexaflumuron Particles

ZHUANG Zhan-Xing^1,2, LU Fu-Sui^1*, CHEN Tian-Tian¹, LIU Yue¹, LUO Wan-Chun¹

1. College of Chemistry and Materials Science, Shandong Agricultural University, Tai’an 271018, China;
2. Shandong Province Pesticides Research Institute, Jinan 250100, China

Received:2008-05-25 Revised:1900-01-01 Online:2009-02-10 Published:2009-02-10
Contact: LU Fu-Sui

Abstract

Abstract: The adsorption properties of styrene-aerylic copolymer dispersant(MOTAS) dispersant on the interface of hexaflumuron particles, such as adsorbed amounts, adsorption state, ζ potential, adsorption force, absorption layer thickness and so on, were studied with the methods of remnant mass concentration, ζ potential instrument, IR and XPS. The results show that the adsorption of MOTAS dispersant on the interface of hexaflumuron particles is correspond with Langmuir equilibrium. The saturated adsorbed amounts, adsorption equilibrium constant k, ζ potential and the absorption layer thickness increase with the dispersant molecular weight increasing. The adsorption of MOTAS dispersant on the interface of hexaflumuron particles is multipoint adsorption, and the hydrogen bond is important force in the combination. The interactions of MOTAS dispersants and hexaflumuron are electrostatic exclusion and stereo-hindrance double effect. This is very important to maintain the stability of hexaflumuron suspension concentrate.

Key words: Hexaflumuron, MOTAS Dispersant, Absorption, ζ potential, Absorption layer thickness, Stability of dispersion

CLC Number:

O648

TrendMD:

ZHUANG Zhan-Xing^1,2, LU Fu-Sui^1*, CHEN Tian-Tian¹, LIU Yue¹, LUO Wan-Chun¹. Adsorption Properties of MOTAS Dispersant on the Interface of Hexaflumuron Particles[J]. Chem. J. Chinese Universities, doi: .

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Adsorption Properties of MOTAS Dispersant on the Interface of Hexaflumuron Particles

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