Papers by Keyword: Electromechanical Property

Abstract: In this study, we report for the first time the fabrication of poly(methyl methacrylate-co- acrylic acid) (PMMAA)-based IPMCs actuator. The PMMAA membranes were prepared by a solution casting method and the carbon nanotubes (CNTs) electrodes on both sides of the membrane. The physical properties were tested in terms of ion-exchange capacity, water uptake and linear expansion. The composition of PMMAA was analyzed using Fourier transform infrared (FT-IR) spectroscopy analysis. The results showed that the PMMAA20 ionic polymer–metal composite actuator had good blocking force harmonic and step responses as an electro-active polymer.

Abstract: A piezoelectric ceramic(lead niobium lithium zirconate titanate, P(LN)ZT), sulphoaluminate cement and polymer were used to fabricate polymer modified cement based piezoelectric composites by cut-filling technique. The influence of P(LN)ZT volume fraction on the electromechanical properties and acoustic impedance of composite was investigated. Comparing with P(LN)ZT Piezoelectric ceramic, the vibration at thickness mode of 1-3 type piezoelectric composite is strengthened, and the electromechanical quality factor is reduced. When P(LN)ZT volume fraction is 30.86%, the acoustic impedance value is 8.24 M rayl, which is close to that of the concrete (9.0 M rayl), and this is suitable for the non destructive inspection.