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Published on: October 10, 2025
Lotus-leaf-inspired nanocellulose composite foam for multifunctional wearable wide-temperature sensors with thermal
Yuhang Sun1, Jinkai Han1, Yanyi Xue1
1Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, College of Materials Science and Technology, Beijing, 100083, China.
Abstract:
As biomass-based composites are increasingly applied in wearable technology, integrated sensing and thermal management are key to wide temperature range applications. Inspired by the hierarchical vein architecture of lotus leaves, a multifunctional cellulose nanofiber (CNF)-based composite foam (PCARG) was fabricated, where CNF and aramid nanofibers (ANF) form a load-bearing framework, while reduced graphene oxide (rGO) provides conductive pathways. Polydimethylsiloxane (PDMS) modification and phytic acid incorporation further enable synergistic regulation of interfacial and surface properties. The foam exhibits excellent superelasticity, maintaining 83.28 ± 2.50% stress retention over 1000 cycles at 70% strain. As a wearable sensor, it demonstrates high sensitivity (GF = 275.3) and reliable sensing responses at -56.6 °C and 200 °C. Additionally, it shows low thermal conductivity (38.53 ± 1.62 mW/mK), flame retardancy (LOI = 28.83 ± 0.58%), and superhydrophobicity (water contact angle 155.05 ± 2.65°). This integrated design offers a promising strategy for advanced wearable devices in extreme conditions.
