Paper Title:

Influence of Lignosulfonates on the Stability of Dimethomorph Water Based Suspension

Periodical Advanced Materials Research (Volumes 550 - 553)
Main Theme Advances in Chemical Engineering II
Edited by Zili Liu, Feng Peng and Xiaoguo Liu
Pages 51-56
DOI 10.4028/www.scientific.net/AMR.550-553.51
Citation Yu Xia Pang et al., 2012, Advanced Materials Research, 550-553, 51
Online since July, 2012
Authors Yu Xia Pang, Ting Zhou, Hong Ming Lou, Ming Song Zhou
Keywords Dimethomorph, Lignosulfonate, Stability, Suspension
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Abstract

The dispersive effect of four lignosulfonates (Kinsperse126, sodium lignosulfonate, magnesium lignosulfonate and a modified lignosulfonate GCL4-1) on the stability of Dimethomorph (DMM) water based suspension with different particle sizes was investigated. DMM suspension without dispersant was unstable owing to the strong aggregation of particles, while the stability was increased after the addition of lignosulfonate (LS), which can be adsorbed on the particle surface and weaken the aggregation of particles. Moreover, the higher sulfonated degree of LS, the better the dispersible ability was. Compared with LS of high sulfonated degree which could improve the zeta potential of DMM, LS with high molecular weight had larger adsorption capacity and steric effect on the pesticide particles. Associated with the dispersive behavior of DMM suspension, the electrostatic repulsion was found to be the more important factor impacting the stability of DMM suspension by comparison with the steric effect.