@article{Liu2025, 
author = {Jinming Liu and Ling Weng and Xiaorui Zhang and Xiaoming Wang and Zijian Wu},
title = {Intrinsic fiber reinforced polyimide aerogel flexible strain sensor applied in high-temperature environment},
year = {2025},
journal = {Nano Research},
volume = {18},
number = {5},
pages = {94907302},
keywords = {flexible strain sensors, polyimide aerogel composite, polyimide nanofiber, sensing performance},
url = {https://www.sciopen.com/article/10.26599/NR.2025.94907302},
doi = {10.26599/NR.2025.94907302},
abstract = {Flexible strain sensors have garnered significant attention for their potential applications in advanced flexible electronics and wearable technologies. However, achieving stable signal transmission at high temperatures remains a major challenge. In this study, we developed a novel polyimide (PI) aerogel composite, reinforced with intrinsically short-cut polyimide nanofibers (PINF) that are surface-coated with silver nanoparticles to enhance both conductivity and mechanical strength. Carbon nanotubes (CNTs) are used as the main filler in synergistic effect with Ag@PINF particles to further improve the conductivity and sensing performance of the composite material. This synergistic design results in a flexible PI aerogel composite material with rapid response time (116 ms), high sensitivity (GF = 3.12), and long-term cycling stability (> 1000 cycles). Additionally, the sensing materials were tested at high temperatures and after high-temperature aging, demonstrating good flexible sensing performance. Experimental results demonstrate that the composite sensor maintains stable strain-sensing performance across a range of environmental temperatures, showing consistent strain response under the same deformation conditions. This work provides a promising approach for fabricating high-performance, temperature-resistant flexible strain sensors, with broad applications in flexible electronics and wearable technologies.}
}