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Synthesis of nonylphenol polyoxyethylene oligomer and application as an effective dispersant in pyraclostrobin suspension concentrate

机译：壬基酚聚氧乙烯低聚物的合成及其在吡咯菌酯悬浮剂中的有效分散剂应用

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摘要

A versatile dispersant plays a critical role in suspension stability of pesticide aqueous suspension concentrate (SC), thus it is extremely important to design and synthesize an effective dispersant for SC. Herein, nonionic trimeric nonylphenol polyoxyethylene (10) (TNP10) was successfully synthesized using nonylphenol polyoxyethylene(10) ethers (NP10) as raw materials. The surface activities of TNP10 were evaluated according to critical micelle concentration (CMC), and the surface tension at CMC (γ_(CMC)). TNP10?showed higher surface activity due to its lower CMC value compared with that of NP10. In addition, the dispersing and stabilizing properties of TNP10 in 25?wt.% pyraclostrobin SC system were investigated. The results showed that TNP10 as a dispersant exhibited more excellent dispersion performance than NP10. Meanwhile, the obtained SC system exhibits shear thinning behavior under high-speed shearing showing typical features of pseudo-plastic non-Newtonian fluids, which conforms to the Herschel-Buckley model. The nonionic trimeric nonylphenol polyoxyethylene (10 can effectively improve the surface activities and the suspension rate and stability of SC compared with its monomer NP10.
机译：多功能分散剂在农药水悬浮浓缩物（SC）的悬浮稳定性中起着至关重要的作用，因此设计和合成有效的SC分散剂极为重要。本文以壬基酚聚氧乙烯（10）醚（NP10）为原料成功合成了非离子型三聚壬基酚聚氧乙烯（10）（TNP10）。根据临界胶束浓度（CMC）和CMC处的表面张力（γ_（CMC））评估TNP10的表面活性。由于TNP10？的CMC值比NP10低，因此具有较高的表面活性。此外，还研究了TNP10在25wt。％吡咯菌酯SC体系中的分散和稳定性能。结果表明，作为分散剂的TNP10表现出比NP10更优异的分散性能。同时，所得的SC体系在高速剪切下表现出剪切稀化行为，显示出假塑性非牛顿流体的典型特征，符合Herschel-Buckley模型。非离子型三聚壬基酚聚氧乙烯（10）与其单体NP10相比可有效改善SC的表面活性，悬浮速率和稳定性。

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