Electrorheological properties of aminated chitosans

This paper focused on effects of amine and π-orbital for enhancing electrorheological properties. Various aminated chitosans were synthesized by coupling of diethylenetriamine, melamine, and Bismarck brown R onto chitosan in this study. After comparing the shear stress of all prepared ER fluids, melamine and Bismarck brown R coupled chitosans showed higher shear stress than other ER chitosan derivatives. Because amine group is cation, cation–π interaction could be expected for enhancing shear stress together with π–π stacking. And these aminated chitosans showed low current density and conductivity due to the cation–π interaction not to the π–π stacking.