为提高柔性可穿戴传感器的电信号输出能力, 设计并制备了以聚二甲基硅氧烷(PDMS)为基体, 锆钛酸铅(PZT)为压电相的0-3型压电复合材料。探究了不同固相含量对浆料流变性能的影响。结果表明, 浆料的粘度与剪切模量随银修饰PZT质量分数(w(PZT))的增加而增加, w(PZT)=38%时浆料屈服点为398.1 Pa, 具有最优的可打印性。在电信号测试中, 经银修饰样品最大电压峰-峰可达20.54 V, 约为未经银修饰样品最大电压峰-峰值的5倍。弯曲测试中, 在长度之差ΔL=7 cm时, 样品电压峰-峰值为55 mV, 证明样品具备柔性传感性能。

To improve the electrical signal output capability of the flexible and wearable sensors, a 0-3 type piezoelectric composite with polydimethylsiloxane(PDMS) as the substrate and lead zirconate titanate (PZT) as the piezoelectric phase is designed and fabricated. The influence of different solid contents on the rheological property of the slurry is investigated. The results show that the viscosity and shear modulus of the slurry increase with the increase of the mass fraction of the Ag-coated PZT. The yield point of the slurry with w(PZT)=38% is 398.1 Pa, which has the best printability. In the electrical signal test, the highest peak-to-peak voltage of the Ag-coated sample is nearly 5 times larger than that of the sample without Ag-coated. Under the bending test conditions, the sample withΔL=7 cm shows a peak-to-peak voltage of 55 mV, which proves that the sample has flexible sensing performance.