Fabrication And Performances Of Epoxy/Multi-walled Carbon Nanotubes/Piezoelectric Ceramic Composites As Rigid Piezo-Damping Materials

There are various vibrations and noises in our daily life and production. With the industrializations and the development of society, the damage of vibrations and noise has been drawing people's highly attention. Traditional damping materials are polymeric materials. Converting mechanical energy into thermal energy through visco-elasticity is polymeric materials' damping mechanism. Thus, the damping efficiency of polymer is much dependent on temperature. Though some measures were taken to improve polymeric damping materials, polymer's damping efficiency is still not desirable.In this experiment, a new damping composite material composed by polymeric Epoxy, piezoelectric phase PZT and electro-conductive phase CNTs has been fabricated by means of blending-melting-compressing.Dynamic mechanical thermal analysis reveals the loss factor of the composites was improved by incorporation of the PZT and the CNT at above critical electrical percolation loading. Based on this new type rigid piezo-damping material, the PZT contributes to the transformation of mechanical noise and vibration energies into electric energy, while the CNT serve in the shorting of the generated electric current to the external circuit. Thermal stability and Mechanical properties were also improved by incorporating these two fillers. An optimum formulation for the rigid piezo-damping materials can be designed on the basis of the results of this study.