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以20%茚虫威悬浮剂为研究对象,通过研究粒径(D50)、zeta电位及稳定性指数(Turbiscan Stability Index,TSI)与悬浮剂热贮后物理稳定性之间的相关性,筛选出可快速预测悬浮剂热贮稳定性的评价指标。结果表明:热贮过程中D50、zeta电位绝对值的变化与热贮后的析水率无相关性,与悬浮率的变化存在定性关系,但无定量关系;用稳定性分析仪在54℃恒温下短时间扫描的结果显示,TSI能与稳定动力学曲线一起较好地预测悬浮剂热贮前后的外观变化及析水情况,悬浮剂在热贮后发生絮凝与析水之间存在临界Delta BS曲线,TSI(54℃,1~5 h)与热贮前后悬浮率的差值呈线性相关。因此,短时间内由D50和zeta电位的变化不能预测悬浮剂的热贮物理稳定性,而利用悬浮剂在54℃下短时间内TSI的测试值能快速准确地预测悬浮剂热贮后的物理稳定性。
A 20% indoxacarb suspending agent was selected as the research object to study the correlation between the particle size (D50), zeta potential and the stability index (TSI) of the suspension and the thermal stability after suspension storage Can quickly predict the thermal stability of suspending agent evaluation index. The results showed that there was no relationship between the change of absolute value of D50 and zeta potential during hot storage and the water storage rate after heat storage, The results of short-time scanning showed that TSI could predict the change of appearance and water distribution of suspending agent before and after heat storage together with the steady kinetic curve. There was a critical Delta BS between flocculation and water precipitation after suspension storage Curve, TSI (54 ℃, 1 ~ 5 h) and the difference before and after storage of the suspension rate was linearly correlated. Therefore, the change of D50 and zeta potential in a short period of time can not predict the thermal storage physical stability of the suspending agent. However, the test value of TSI at a short time of 54 ° C by the suspending agent can rapidly and accurately predict the physical property of the suspending agent after thermal storage stability.