A polyimide-based ionogel with enhanced thermal robustness and self-healing properties for strain sensors
발표자
김재윤 (한국화학연구원)
연구책임자
이근형 (인하대학교)
조경국 (한국화학연구원)
초록
내용
The growing demand for wearable healthcare devices highlights the advantages of ionogel E-skin, particularly their skin-like mechanical properties, ionic conductivities, non- volatility. However, conventional polymer ionogels have a limited temperature range due to the restricted thermal stability of the polymer matrix. In this study, we designed a novel ionogel synthesized from thermostable polyimide backbone composed of 4,4’-(hexafluoroisopropylidene)diphthalic anhydride (6FDA), 2,2’-bis(trifuloromethyl)benzidine (TFMB) and 1-ethyl-3-methylimidazolium bis(trifluoromethyl sulfonyl)imide ([EMI][TFSI]). The resulting ionogel exhibits thermal stability over a wide temperature range. In addition, the ion-dipole interactions between the trifluoromethyl groups and the imidazolium cation impart skin-like self-healing functionality. A flexible strain sensor fabricated with this ionogel demonstrates accurate and reliable sensing performance under extreme temperature conditions.