Influence of metal ion on electrorheological properties of carboxyl-group-immobilized chitosan dispersed suspension under electric field

This paper focuses on the influence of metal ions on electrorheological and electric properties. The metal particle has not been used as an electrorheological suspension due to the high conductivity and the sedimentation in the suspension although it is expected good electrical properties. In this study, carboxyl group and metal ions were introduced to the surface of the chitosan particle to confirm the influence of the metal ion on the electrorheological property. Although the synthesized chitosan succinate showed good electrorheological property, its metal complex (chitosan succinate–metal complex formed with Al3+, Cu2+, Ni2+, Fe2+, or Zn2+) dispersed suspension showed the low electro-response property and high values of current density and conductivity.