十二烷基磺酸插层类水滑石的制备及其对烟嘧磺隆油悬浮剂流变性的影响

以Mg-Al类水滑石为前体，制备了疏水的十二烷基磺酸插层类水滑石（DSO-LDHs），对其结构进行了光学显微镜、XRD和红外光谱表征。 结果表明，十二烷基磺酸钠成功插入到Mg-Al类水滑石层间。 DSO-LDHs作为触变材料应用于4%烟嘧磺隆油悬浮剂时，流变学研究结果表明，农药颗粒通过静电作用附着在DSO-LDHs特殊的薄片层结构中。 随着DSO-LDHs添加量的增加，油悬浮体系呈正触变性，且体系的屈服值增大，而析油率下降。

Preparation of Dodecyl Sulfonate-Layered Double Hydroxides and Influence on Nicosulfuron Oil Flowable Concentrate Rheological Property

Hydrophobic dodecyl sulfonate-layered double hydroxides（DSO-LDHs） were prepared with Mg-Al-LDHs as the precursors, and its structure was characterized by XRD, optical microscope and FTIR. The results indicate that DSO anions are intercalated into LDHs interlayer successfully. In this paper, DSO-LDHs were applied as thixotropic materials in 4% nicosulfuron oil flowable suspension. The rheological results indicate that pesticide particles are attached to DSO-LDHs through electrostatic interaction since DSO-LDHs has a special structure of hydrotalcite laminated layers. As the concentration of DSO-LDHs increases, the oil suspension shows a positive thixotropy, and the yield value is also increased, whereas the oil separation ratio is decreased.