Chinese Journal of Applied Chemistry

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

ZHAI Lili1, LU Fusui2*, XIA Hui1, LIAO Kechao1   

  1. (1.College of Plant Protection;2.College of Chemistry and Materials Science,
    Shandong Agricultural University,Tai′an 271018,China)
  • Received:2012-12-03 Revised:2013-01-17 Published:2013-10-10 Online:2013-10-10
  • Contact: LU Fusui

Abstract: 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.

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