为研究铂-全氟磺酸(Pt-PFSA)复合材料的传感特性,首先,测试了在阶跃激励和正弦激励下,Pt-PFSA 复合材料的响应输出电压;然后,采用化学镀方法,将铂原子沉积在由Nafion溶液制备的0.4 mm厚的Nafion阳离子交换膜的两个表面上;最后,考察了含水量对Pt-PFSA复合材料输出电压的影响,预测了正弦激励下PtPFSA复合材料的传感性能,进行了不同频率的正弦激励实验.结果表明:采取保湿措施后,含水量变化导致的输出电压降低幅度低于5％;在阶跃激励信号下,当Pt-PFSA复合材料的应变为0.1％时,输出电压具有时延;给出了Pt-PFSA复合材料的灵敏系数表达式,当正弦激励信号频率为5.9 Hz时,复合材料的灵敏系数为3.555 8 mV/0.2％,得到的实验结果与预测吻合较好.研究为Pt-PFSA复合材料传感性能模型的建立奠定了基础.
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