Molecule-based electrorheological material, electrorheological performance and molecule structure

Molecule-based electrorheological (ER) materials as a novel type of ER materials, a series of compounds using melamine (C₃N ₆H₆) as the substrate, have been synthesized using orthophosphoric acid (H₃PO₄), oxalic acid (H ₂C₂O₄), 4-toluenesulfonic acid (PTA, C ₇H₈O₃S) and 5-sulfosalicylic acid (SSA, C ₇H₆O₆S), respectively as starting materials. The ER performance and dielectric property of materials have been studied. The results show that these materials have ER activity. The unusual relationship between dielectric property and ER property of these materials was found and discussed. The composition and structure of molecule are the dominant factors, the function group plays an important role, in influencing ER performance of the molecule-based ER material.