In this work, the multifunctional elastomer foam with robust mechanical properties, highly piezoresistive sensitivity, special temperature-sensitive characteristic and excellent EMI shielding property were successfully fabricated by directly introducing thermos-expandable microspheres (EM) into polydimethylsiloxane/multi-walled carbon nanotube (PDMS/CNT). It was found that the addition of EM enhanced the piezoresistivity, integrating the properties of quick response (60 ms), excellent reliability and extraordinary stability. For example, the value of I/I₀ in the PDMS/EM/CNT composites with 30 wt% EM and 1.0 wt% CNT achieved 1800% enhancement compared to the composites without EM. Besides, the self-reinforced PDMS/EM/CNT elastomer with unique softening behavior showed great potential in strain alerting device. Moreover, the special temperature-sensitive sensing in the unfoamed PDMS/EM/CNT sample was studied in detail, exhibiting the NTC effect first, and then PTC effect, finally NTC again. Furthermore, the EMI shielding performance got incredible improvement due to the introduction of multiple interfaces and the enhancement of conductivity. For example, by incorporating 10, 30 and 50 vol.% EM into the PDMS/CNT composites, the improved EMI SE of ∼32, ∼36 and ∼43 dB were gained, respectively.

在这项工作中，通过将热膨胀性微球（EM）直接引入聚二甲基硅氧烷/多壁碳纳米管（PDMS）中，成功制造了具有强大机械性能，高压阻灵敏度，特殊温度敏感特性和出色EMI屏蔽性能的多功能弹性体泡沫。 / CNT）。发现添加EM增强了压阻性，并具有快速响应（60 ms），出色的可靠性和非凡稳定性的特性。例如I / I的值₀与没有EM的复合材料相比，具有30wt％的EM和1.0wt％的CNT的PDMS / EM / CNT复合材料中的α-丁二烯获得了1800％的增强。此外，具有独特软化性能的自增强PDMS / EM / CNT弹性体在应变警报装置中显示出巨大潜力。此外，还对未发泡的PDMS / EM / CNT样品中的特殊温度敏感传感进行了详细研究，首先显示出NTC效应，然后展现出PTC效应，最后展现出NTC。此外，由于引入了多个接口并增强了电导率，EMI屏蔽性能得到了惊人的提高。例如，通过将10％，30％和50％（体积）的EM掺入PDMS / CNT复合材料中，可分别获得〜32，〜36和〜43 dB的改进EMI SE。