Highly stretchable, anti-corrosive and wearable strain sensors based on the PDMS/CNTs decorated elastomer nanofiber composite
Highly stretchable, anti-corrosive and wearable strain sensors based on the PDMS/CNTs decorated elastomer nanofiber composite
复制标题
基于PDMS/CNTs装饰的弹性体纳米纤维复合材料的高拉伸、防腐和耐磨应变传感器
DOI：
10.1016/j.cej.2019.01.014
复制
发表时间：
2019-04-15
影响因子：
15.1
通讯作者：
Gao, Jiefeng
中科院分区：
文献类型：
--
作者：
Wang, Ling;Chen, Yang;Gao, Jiefeng
基于导电聚合物复合材料的应变传感器在人工皮肤、可穿戴医疗设备等领域具有广阔的应用前景，但如何制备具有良好拉伸性、耐腐蚀性、耐久性和可靠性的应变传感器仍是一个挑战。采用超声波诱导碳纳米管（CNTs）修饰电纺热塑性聚氨酯（TPU）纤维表面，再经聚二甲基硅氧烷（PDMS）修饰，制备了基于导电热塑性聚氨酯/碳纳米管/聚二甲基硅氧烷（TPU/CNTs/PDMS）的超疏水应变传感器。碳纳米管均匀地分散在具有分级结构的表面上，构成了导电网络。低表面能的聚二甲基硅氧烷层赋予了复合材料超疏水性，从而提高了复合材料的抗腐蚀性能。CNTs/PDMS的引入提高了杨氏模量、拉伸强度和断裂伸长率。超疏水性和导电性在循环拉伸-释放测试后仍能保持，显示出优异的耐久性。当用作可穿戴应变传感器时，该复合材料能够检测身体运动，甚至可以在恶劣条件下（潮湿，酸性和碱性环境）工作，在可穿戴电子产品中显示出良好的应用前景。
Conductive polymer composite based strain sensors have promising applications in the fields of artificial skin, wearable health-care device, etc. However, fabrication of strain sensors with good stretchability, anti-corrosion, excellent durability and reliability remains challenging. In this work, a superhydrophobic strain sensor based on conductive thermoplastic polyurethane/carbon nanotubes/polydimethylsiloxane (TPU/CNTs/PDMS) was prepared by ultrasonication induced CNTs decoration onto the electrospun TPU nanofiber surface, followed by the PDMS modification. Uniformly dispersed CNTs on the nanofiber surface with a hierarchical structure construct the conductive network. The PDMS layer with a low surface energy endows the nanofiber composite with superhydrophobicity thus anti-corrosion property. The introduction of CNTs/PDMS improves both the Young's modulus, tensile strength and the elongation at break. The superhydrophobicity and conductivity can be maintained after the cyclic stretching-releasing test, displaying excellent durability. When used as a wearable strain sensor, the nanofiber composite is capable of detecting body motion and could work even under harsh conditions (moisture, acid and alkaline environment), showing promising application in wearable electronics.