Fe3+coordination-enhanced polyvinyl alcohol-sodium carboxymethyl cellulose multi-network hydrogel for flexible sensing and electrocardiogram monitoring
ZHAO Xianglei
WU Yue
LI Xinyi
GUO Xin
JIANG Xubao
GU Xiangling
Abstract：In order to achieve the synergistic optimization of the mechanical properties and electrical conductivity of polyvinyl alco-hol(PVA)hydrogels,we used PVA and sodium carboxymethyl cellulose(CMC)as hydrophilic matrices and combined with Fe3+ions to construct a multiple cross-linked network.Through ion complexing method,the PVA-CMC/Fe3+multi-network hydrogel was pre-pared.Systematic characterization confirmed that Fe3+could not only enhance the mechanical strength,as a cross-linker but also signifi-cantly improve the electrical conductivity.The test results showed that the optimized PVA-CMC-0.2Fe3+hydrogel exhibited a tensile strength of 112.66 kPa and an electrical conductivity of 3.03 S/m.This hydrogel has high sensitivity and stability,can be assembled as flexible sensors for monitoring human joint movements and electrocardiogram(ECG)signals.
Keywords：HydrogelIonic coordinationFlexible sensorHealth monitoringElectrocardiogram monitoring
Publication Date：2026-02-28
Online Publishing Date：2026-09-11(First online date of this platform, not the publication date of the document)
Pages：8( 28-35 )