Del Bosque Antonio, Calderón-Villajos Rocío, Sánchez María, Ureña Alejandro
Materials Science and Engineering Area, Escuela Superior de Ciencias Experimentales y Tecnología, Universidad Rey Juan Carlos, C/Tulipán s/n, 28933 Madrid, Spain.
Nanomaterials (Basel). 2022 Aug 21;12(16):2878. doi: 10.3390/nano12162878.
Multifunctional nanocomposites based on carbon nanotubes (CNT)-reinforced Surlyn, which is a commercial ionomeric polymer, are manufactured by micro-compounding and hot-press processes. Multifunctionality is studied in terms of electromechanical response and self-healing abilities. The strain sensing analysis under tensile conditions shows ultra-high gauge factor (GF) values from 10 to 20 at low strain levels up to 10 at high strain levels, and a decreasing sensitivity as CNT content increases because of the reduction in the tunneling distance between neighboring nanoparticles. The electromechanical response under consecutive tensile cycles demonstrated the robustness of the proposed materials due to the repeatability of both responses. With regard to mechanical properties, the addition of CNT induces a clear increase in Young's modulus because the nanoparticles enable uniform load distributions. Moreover, self-healing capabilities are improved when 4 and 5 wt.% CNT are introduced because of the synergistic effect of the high thermal conductivity of CNT and their homogeneous distribution, promoting an increase in the thermal conductivity of bulk nanocomposites. Thus, by comparing the measured functionalities, 4 and 5 wt.% CNT-reinforced Surlyn nanocomposites showed a high potential for various applications due to their high degree of multifunctionality.
基于碳纳米管（CNT）增强的沙林（Surlyn，一种商业离聚物聚合物）的多功能纳米复合材料，是通过微复合和热压工艺制造的。从机电响应和自愈能力方面对多功能性进行了研究。拉伸条件下的应变传感分析表明，在低应变水平下，超高应变片系数（GF）值为10至20，在高应变水平下高达10，并且随着CNT含量的增加，由于相邻纳米颗粒之间隧穿距离的减小，灵敏度降低。连续拉伸循环下的机电响应表明，由于两种响应的可重复性，所提出的材料具有稳健性。关于机械性能，添加CNT会使杨氏模量明显增加，因为纳米颗粒能够实现均匀的载荷分布。此外，由于CNT的高导热性及其均匀分布的协同效应，当引入4 wt.%和5 wt.%的CNT时，自愈能力得到改善，促进了块状纳米复合材料热导率的增加。因此，通过比较所测量的功能，4 wt.%和5 wt.% CNT增强的沙林纳米复合材料由于其高度的多功能性而在各种应用中显示出很高的潜力。
