The application of the mixed system of polyoxyethylene ether and polycarboxylate in 430 g·L^-1 tebuconazole suspension concentrate

• Main Authors: ZHU Hong, WENG Yujia, REN Tianrui, ZHANG Bo
• Format: Article
• Language: English
• Published: Academic Journals Center of Shanghai Normal University 2020-04-01
• Series: Journal of Shanghai Normal University (Natural Sciences)
• Subjects: tebuconazole; suspension concentrate(sc); polyoxyethylene ether; polycarboxylate; suspension stability
• Online Access: http://qktg.shnu.edu.cn/zrb/shsfqkszrb/ch/reader/view_abstract.aspx?file_no=20200205
• ISSN: 1000-5137; 1000-5137

The mixed surfactant system is helpful to improve suspension stability of pesticide suspension concentrate(SC). Herein, the effect of the mixed system of polysacchanate dispersant SD-840 and polyoxyethylene ether dispersant 601P on the stability of 430 g·L^-1 tebuconazole SC was studied.The changes of the particle size, zeta potential, viscosity, and suspension rate of 430 g·L^-1 tebuconazole SC before and after the thermal storage were carefully investigated.The results showed that the suspension stability of 430 g·L^-1 tebuconazole SC obtained by the mixed system was superior to that of SC prepared by only SD-840 or 601P, respectively. Especially, the SC obtained by the mixed system with a 0.75 mass ratio between SD-840 and 601P exhibited the superior suspension stability and minimum variation of particle size and suspension rate before and after thermal storage.The suspension rates and <i>D</i>₉₀ particle diameters before and after thermal storage were 99.47%, 96.58% and 2.35 μm, 2.50 μm, respectively.