高效氟氯氰菊酯水乳剂剪切流变性质的影响因素及其与稳定性的关系  

Influence Factors on the Shear Rheological Properties of Beta-cyfluthrin EW and Its Relationship to Stability

作　　者：高越[1] 赵劲宇 王振[1] 张鹏九[1] 刘中芳[1] 史高川 范仁俊[1] GAO Yue;ZHAO Jin-yu;WANG Zhen;ZHANG Peng-jiu;LIU Zhong-fang;SHI Gao-chuan;FAN Ren-jun(Shanxi Academy of Agricultural Sciences Shanxi Key Laboratory of Integrated Pest Management in Agriculture/Institute of Plant Protection, Shanxi Academy of Agricultural Sciences, Taiyuan 030031, China;Shanxi Academy of Agricultural Sciences Institute of Cotton Research, Yuncheng 044000, Shanxi, China)

机构地区：[1]山西省农业科学院农业有害生物综合治理山西省重点实验室/植物保护研究所,太原030031 [2]山西省农业科学院棉花研究所,山西运城044000

出　　处：《农药》2019年第3期183-188,共6页Agrochemicals

基　　金：国家重点研发计划项目(2017YFD020030502);山西省重点研发计划项目(2015-TN-03-09);山西省农科院农业科技成果转化与示范推广项目(2018CGZH-42)

摘　　要：[目的]探索不同因素对高效氟氯氰菊酯水乳剂剪切流变性质的影响,以及剪切流变性质与稳定性2者之间的关系。[方法]通过测试不同乳化剂组合及其不同配比、黄原胶的不同用量、外加不同的存储时间下高效氟氯氰菊酯水乳剂黏度曲线和流变曲线,研究其对高效氟氯氰菊酯水乳剂流变特性的影响。[结果]高效氟氯氰菊酯水乳剂为假塑性流体,其中黄原胶用量对该水乳剂的剪切流变性质影响最大,假塑性特征随着其浓度的升高而加强,黄原胶含量越高对应的黏度和剪切应力也越高;乳化剂组合和存储时间影响次之,不同的乳化剂和存储时间对应的剪切流变性质差异明显,4号乳化剂配方幅度变化最大,剪切应力和黏度最高;随着存储时间变长,对应的剪切应力减小;而乳化剂用量则影响不大,流变特征的差异度不明显。[结论]高效氟氯氰菊酯水乳剂流变性质与体系稳定性具有一定的关联性,从整体上看,屈服值越大,体系越稳定。[Aims] The aims were to explored the effects of different factors on the shear rheological properties of beta-cyfluthrin EW, and the relationship between shear rheological properties and stability.[Methods] By testing different emulsifier combinations, different dosage of xanthan gum, viscosity curves and rheological curves of beta-cyfluthrin EW under different storage time, study its effect on the rheological properties of beta-cyfluthrin EW.[Results] Beta-cyfluthrin EW was a pseudoplastic fluid, the dosage of xanthan gum had the greatest influence on the shear rheological properties of the water emulsion, pseudoplastic characteristics were enhanced as their concentration increases, the higher the content of xanthan gum, the higher corresponding viscosity and shear stress, the influence of emulsifier combination and storage time comes second, different emulsifiers and storage time correspond to different shear rheological properties, No. 4 emulsifier formula had the largest change in amplitude, shear stress and viscosity were the highest. As the storage time becomes longer, the corresponding shear stress decreases. But the dosage of emulsifier had little influence, and the difference in rheological characteristics was not obvious.[Conclusions] Rheological properties of beta-cyfluthrin aqueous emulsions have a certain correlation with the stability of the system. Overall, the greater the yield value, the more stable the system.

关 键 词：高效氟氯氰菊酯水乳剂 黏度 剪切流变 乳化剂 

分 类 号：TQ450.7[化学工程—农药化工]