All-organic dielectric-percolative three-component composite materials with high electromechanical response

Cheng Huang; Zhang, Q. M.; deBotton, Gal; Bhattacharya, Kaushik
May 2004
Applied Physics Letters;5/31/2004, Vol. 84 Issue 22, p4391
Academic Journal
By combining the high-dielectric copper phthalocyanine oligomer (PolyCuPc) and conductive polyanline (PANI) within polyurethane (PU) matrix an all-organic three-component dielectric-percolative composite with high dielectric constant is demonstrated. In this three-component composite system, the high-dielectric-constant PolyCuPc particulates enhance the dielectric constant of the PU matrix and this combined two-component dielectric matrix in turn serves as the high-dielectric-constant host for the PANI to realize percolative phenomenon and further enhance the dielectric response. As a result, an electromechanical strain of 9.3% and elastic energy density of 0.4 J/cm3 under an electric field of 20 V/μm can be induced. © 2004 American Institute of Physics.


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