聚苯胺改性0-3 型PZT/ 聚氨酯复合材料的极化与电性能

以聚苯胺( PANI) 原位聚合改性聚氨酯( PU) 树脂为基体, 锆钛酸铅( PZT) 陶瓷为功能相, 制备了0-3 型压电复合材料, 研究了复合材料极化和电性能。结果表明: 适量PANI 能够有效地提高0-3 型复合材料的极化和压电性能。随着PANI 含量增加, 复合材料的压电系数d33和机电耦合系数kp 迅速增大。当PANI 体积分数为4 %时, 复合材料的d33 = 34 pC/ N , kp = 0.25 , 均达到最大值。复合材料的介电常数和介电损耗随PANI含量的增加而上升。

Polarization and electrical properties of 0-3 PZT/ polyurethanecomposites doped with polyanil ine

The 0-3 piezoelect ric composites were fabricated with the polyurethane ( PU) doped with polyaniline( PANI) by in si tu polymerization as mat rix and lead zirconate titanate ( PZT) as function phase. The polarizationand elect rical properties of the composites were studied. The result s show that the polarization and piezoelect ricproperties of 0-3 composites can effectively increase with an appropriate volume f raction of PANI. The piezoelect ricconstant ( d33 ) and elect romechanical coupling coefficient ( kp ) rapidly increase with increasing the PANI content . Atthe PANI volume f raction of 4 % the d33 and kp of the composite are 34 pC/ N and 0.25 , respectively , and show themaximum values. The dielect ric constant and dielect ric loss of the composites rise with increasing the content ofPANI.