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A liquid-free cellulose-derived ionic conductive elastomer with high strain sensitivity and anti-freezing properties for multifunctional sensing and health monitoring
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DOI：10.1016/j.colsurfa.2026.141515.png)
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Abstract
En 中文
To address the issues of poor environmental stability and the difficulty in simultaneously improving mechanical strength and sensor sensitivity in traditional ion conductors, a double-crosslinked network was constructed through in situ free radical polymerization of polyethylene glycol (PEG) and hydroxyethyl methacrylate (HEMA) to form a PEG/PHEMA matrix, and further enhanced by the incorporation of polyaniline-modified carboxylated cellulose nanocrystals (C-CNC@PANI) and lithium chloride (LiCl). A multifunctional liquid-free ionic conductive elastomer (CHP) with high mechanical strength (0.578 MPa), ultra-high stretchability (817.4% strain), excellent strain resolution (δ = 0.2%), outstanding strain sensitivity coefficient (GF = 1.827), and superior linearity (R2 = 0.997) was successfully prepared. The material exhibits excellent antifreeze (conductivity retention rate > 62%, −20°C), self-healing (92%, 30 min), and self-adhesive (adhesion > 42 KPa) properties. Additionally, it demonstrates strain, temperature (TCR = −2.75%/°C, 25–55°C), and humidity (S = −3.51%/%RH, 55–70%RH) sensing capabilities. Experimental results demonstrate that the material could not only be used as a writing board for handwriting monitoring but also enable real-time monitoring of human motion, physiological signals, and environmental parameters through a wireless sensing system, achieving temperature and humidity alarm functions. This study offers an innovative solution for next-generation adaptive flexible electronics, promising broad application in e-skin, human-computer interaction, and health monitoring.
Keywords:
Cellulose nanocrystals
Liquid-free
Multifunctional sensing
Wireless sensing system
Human health monitoring
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153
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