Synthesis and electrorheological activity of a modified kaolinite/carboxymethyl starch hybrid nanocomposite

Xiaopeng Zhao, Baoxiang Wang, Jia Li

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26 Scopus citations

Abstract

According to physical and chemical designs, a novel modified kaolinite/carboxymethyl starch (CMS) nanocomposite was synthesized with a displacement method with dimethyl sulfoxide modified kaolinite as an intermediate. The material characterizations were carried out by X-ray diffraction, transmission electron microscopy, thermogravimetric analysis, and scanning electron microscopy. The analyses showed that kaolinite was dispersed at the nanometer-scale segments into the CMS matrix. The electrorheological behavior of the modified kaolinite/CMS hybrid nanocomposite dispersed in silicone oil was investigated. Under electric field strength (E) = 4 kV/ mm and shear rate (γ̇) = 105 s-1, the shear stress of the modified kaolinite/CMS nanocomposite electrorheological fluid could be up to 8380 Pa, which was 10.4 times that of the electrorheological fluid at zero field. The modified kaolinite/CMS nanocomposite electrorheological fluid also exhibited good sedimentation properties.

Original languageEnglish
Pages (from-to)2833-2839
Number of pages7
JournalJournal of Applied Polymer Science
Volume108
Issue number5
DOIs
StatePublished - 5 Jun 2008

Keywords

  • Clay
  • Colloids
  • Nanocomposites
  • Nanotechnology
  • Rheology

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