聚羧酸盐和聚氧乙烯醚磷酸酯分散剂复配体系对戊唑醇水悬浮剂分散稳定性的影响
投稿时间:2019-01-02      点此下载全文 HTML
引用本文:翁雨佳,朱红,张博,等.聚羧酸盐和聚氧乙烯醚磷酸酯分散剂复配体系对戊唑醇水悬浮剂分散稳定性的影响[J].农药学学报,2019,21(4):523-530.
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翁雨佳 上海师范大学 化学与材料科学学院 教育部资源化学重点实验室, 上海绿色能源化工工程技术研究中心, 上海 200234  
朱红 上海师范大学 化学与材料科学学院 教育部资源化学重点实验室, 上海绿色能源化工工程技术研究中心, 上海 200234  
张博 上海师范大学 化学与材料科学学院 教育部资源化学重点实验室, 上海绿色能源化工工程技术研究中心, 上海 200234 zb830216@shnu.edu.cn 
任天瑞 上海师范大学 化学与材料科学学院 教育部资源化学重点实验室, 上海绿色能源化工工程技术研究中心, 上海 200234 trren@shnu.edu.cn 
基金项目:上海市科技兴农重点攻关项目(沪农科创字(2018)第3-3号)
中文摘要:聚羧酸盐和聚氧乙烯醚磷酸酯分散剂复配体系有利于提高农药水悬浮剂的物理稳定性。本研究选用430 g/L戊唑醇水悬浮剂(SC)作为研究对象,研究了聚羧酸盐分散剂850和聚氧乙烯醚磷酸酯分散剂601p复配体系的胶束流体动力学直径以及对戊唑醇SC黏度、Zeta电势、比吸光度和流变性质的影响。结果显示:单独用601p制备的戊唑醇SC的分散稳定性要高于单独用850制备的,而用两者复配体系制备的戊唑醇SC的稳定性明显高于用单一分散剂制备的。进一步研究发现,分散剂的复配比例对戊唑醇SC的物理稳定性也有不同影响,其中当m(850):m(601p)= 1:1时,复配分散剂的胶束动力学直径不再变化,制得的戊唑醇SC分散稳定性最好,表现为黏度相对较小,Zeta电势为 –40.8 mV。
中文关键词:聚羧酸盐分散剂  聚氧乙烯醚磷酸酯分散剂  复配分散剂  戊唑醇  水悬浮剂  分散稳定性
 
Effect of the composite system derived from polycarboxylate and polyoxyethylene ether phosphate dispersant on the dispersion stability of tebuconazole aqueous suspension concentrate
Abstract:The polycarboxylate and polyoxyethylene ether phosphate composite system is beneficial to improve the physical stability of pesticide aqueous suspensions. In this study, tebuconazole 430 g/L suspension concentrate (SC) was selected as the research object. The micelle hydrodynamic diameter of the polycarboxylate dispersant 850 and the polyoxyethylene ether phosphate dispersant 601p composite system and their effects on the viscosity, zeta potential, specific absorbance and rheological properties of tebuconazole were studied in detail. The results showed that the dispersion stability of tebuconazole SC prepared using 601p alone was higher than that using 850. And the stabilities of tebuconazole SC prepared by the above mentioned two composite systems were significantly higher than that of the single dispersant. Further studies demonstrated that the proportion of dispersant system also had influence on the physical stability of tebuconazole SC. When m(850):m(601p)=1:1, the micelle dynamic diameter of the composite dispersant is stable, and the prepared tebuconazole SC has the best dispersion stability. Specifically it exhibited a relatively small viscosity, and the zeta potential is -40.8 mV.
Key words:polycarboxylate dispersant  polyoxyethylene ether phosphate dispersant  composite dispersant  tebuconazole  aqueous suspension  dispersion stability
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