Wearable PANI@CoFe2O4 organohydroges for strain sensing, EMI shielding and thermal insulation
- 1*Correspondence to: Prof. Daohai Zhang. School of Chemical Engineering of Guizhou Minzu University, Guiyang 550025, Guizhou, China. E-mail: [email protected]
Abstract
With the rapid escalation of electromagnetic pollution and electromagnetic interference, conventional EMI shielding materials can no longer satisfy the integrated requirements of next-generation flexible electronic devices and information terminals for mechanical deformability, wearable adaptability, and real-time signal monitoring. In this work, a multifunctional polyacrylamide/glycerol (PG)/P@CoFe (PAM/Gly/PANI@CoFe2O4) composite organohydrogel sensor with synergistic electromagnetic dissipation was fabricated through a hydrothermal-assisted one-pot strategy. CoFe2O4 magnetic nanoparticles were first synthesized via an ethylene glycol-assisted solvothermal route. Subsequently, the surface-active sites of CoFe2O4 were utilized to induce aniline polymerization, yielding conductive-magnetic polyaniline (PANI)@CoFe2O4 composite nanoparticles. Mechanical characterization demonstrated that the resulting organohydrogel exhibited excellent compressive properties, while the incorporation of glycerol effectively suppressed water evaporation and enhanced water-retention capability. Electromagnetic measurements revealed that, at a PANI@CoFe2O4 loading of 4 wt.%, the 4 mm-thick hydrogel achieved an electrical conductivity of 0.55 ± 0.01 S/m and an average electromagnetic interference shielding effectiveness (EMI SE) of 50.27 ± 2.51 dB in the X-band. In addition, the hydrogel exhibited excellent thermal iInsulation performance. More importantly, its outstanding adhesion and rapid stimuli-responsive behavior enabled favorable human–machine interactive strain-sensing performance with good compatibility. This work provides an effective strategy for the development of integrated, robust multifunctional materials that simultaneously combine flexible sensing, electromagnetic shielding, and thermal insulation.
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BibTeX
@article{lei2026wearable,
title = {{Wearable PANI@CoFe2O4 organohydroges for strain sensing, EMI shielding and thermal insulation}},
author = {Zhi Lei and Maoxia Lu and Daohai Zhang and Dongju Liu and Yupeng Hu and Anmin Song and Junlei Wang and Wei Gong},
journal = {Soft Science},
year = {2026},
month = may,
doi = {10.20517/ss.2026.22},
url = {https://doi.org/10.20517/ss.2026.22},
note = {CC BY},
}
RIS
TY - JOUR
TI - Wearable PANI@CoFe2O4 organohydroges for strain sensing, EMI shielding and thermal insulation
AU - Zhi Lei
AU - Maoxia Lu
AU - Daohai Zhang
AU - Dongju Liu
AU - Yupeng Hu
AU - Anmin Song
AU - Junlei Wang
AU - Wei Gong
PY - 2026
DA - 2026/05/20
JO - Soft Science
DO - 10.20517/ss.2026.22
UR - https://doi.org/10.20517/ss.2026.22
AB - With the rapid escalation of electromagnetic pollution and electromagnetic interference, conventional EMI shielding materials can no longer satisfy the integrated requirements of next-generation flexible electronic devices and information terminals for mechanical deformability, wearable adaptability, and real-time signal monitoring. In this work, a multifunctional polyacrylamide/glycerol (PG)/P@CoFe (PAM/Gly/PANI@CoFe2O4) composite organohydrogel sensor with synergistic electromagnetic dissipation was fabricated through a hydrothermal-assisted one-pot strategy. CoFe2O4 magnetic nanoparticles were first synthesized via an ethylene glycol-assisted solvothermal route. Subsequently, the surface-active sites of CoFe2O4 were utilized to induce aniline polymerization, yielding conductive-magnetic polyaniline (PANI)@CoFe2O4 composite nanoparticles. Mechanical characterization demonstrated that the resulting organohydrogel exhibited excellent compressive properties, while the incorporation of glycerol effectively suppressed water evaporation and enhanced water-retention capability. Electromagnetic measurements revealed that, at a PANI@CoFe2O4 loading of 4 wt.%, the 4 mm-thick hydrogel achieved an electrical conductivity of 0.55 ± 0.01 S/m and an average electromagnetic interference shielding effectiveness (EMI SE) of 50.27 ± 2.51 dB in the X-band. In addition, the hydrogel exhibited excellent thermal iInsulation performance. More importantly, its outstanding adhesion and rapid stimuli-responsive behavior enabled favorable human–machine interactive strain-sensing performance with good compatibility. This work provides an effective strategy for the development of integrated, robust multifunctional materials that simultaneously combine flexible sensing, electromagnetic shielding, and thermal insulation.
SN - 2769-5441
ER -