TY - JOUR
T1 - Enhanced electromechanical properties in SWCNT/GO-based flexible composites with preliminary healing capability for human motion detection
AU - Vo, Thi Sinh
AU - Park, Yunjeong
AU - Kim, Kyunghoon
N1 - Publisher Copyright:
© 2025 The Authors
PY - 2025/8
Y1 - 2025/8
N2 - In this study, we report the fabrication and characterization of flexible composites with enhanced electromechanical properties and preliminary healing capability for next-generation wearable sensors. Single-walled carbon nanotubes (SWCNTs) and graphene oxide (GO) were synergistically incorporated into melamine sponge (MS) frameworks, forming conductive carbon nanohybrid bridges. These functional sponges were embedded in a polydimethylsiloxane (PDMS) matrix to yield stretchable composites (SWCNT/GO@MS-PDMS) with high structural integrity and stable electrical pathways. Among the samples, the composite with an optimized SWCNT/GO ratio (FC3) exhibited the best balance of conductivity (3.58 ± 0.42 kΩ), tensile strength (1.68 ± 0.21 MPa), Young's modulus (0.56 ± 0.22 MPa), and elongation at break (92.6 ± 25.2 %). Electromechanical analysis revealed excellent sensitivity with a gauge factor (GF) reaching 7.12 in the high-strain regime and outstanding cyclic stability under repeated strain loading. A novel SWCNT/C-ink (SWCNT/Ci)-based adhesive, integrated with a curing agent, enabled preliminary healing of fractured composites, recovering both mechanical and electrical functionalities. SEM and spectroscopy confirmed successful nanohybrid dispersion, chemical bonding, and structural integration. These results underscore the potential of the developed SWCNT/GO@MS-PDMS and SWCNT/Ci-based adhesive composites for use in human motion detection, health monitoring, and stretchable electronics.
AB - In this study, we report the fabrication and characterization of flexible composites with enhanced electromechanical properties and preliminary healing capability for next-generation wearable sensors. Single-walled carbon nanotubes (SWCNTs) and graphene oxide (GO) were synergistically incorporated into melamine sponge (MS) frameworks, forming conductive carbon nanohybrid bridges. These functional sponges were embedded in a polydimethylsiloxane (PDMS) matrix to yield stretchable composites (SWCNT/GO@MS-PDMS) with high structural integrity and stable electrical pathways. Among the samples, the composite with an optimized SWCNT/GO ratio (FC3) exhibited the best balance of conductivity (3.58 ± 0.42 kΩ), tensile strength (1.68 ± 0.21 MPa), Young's modulus (0.56 ± 0.22 MPa), and elongation at break (92.6 ± 25.2 %). Electromechanical analysis revealed excellent sensitivity with a gauge factor (GF) reaching 7.12 in the high-strain regime and outstanding cyclic stability under repeated strain loading. A novel SWCNT/C-ink (SWCNT/Ci)-based adhesive, integrated with a curing agent, enabled preliminary healing of fractured composites, recovering both mechanical and electrical functionalities. SEM and spectroscopy confirmed successful nanohybrid dispersion, chemical bonding, and structural integration. These results underscore the potential of the developed SWCNT/GO@MS-PDMS and SWCNT/Ci-based adhesive composites for use in human motion detection, health monitoring, and stretchable electronics.
KW - Adhesive
KW - Carbon nanohybrid
KW - Electromechanical sensor
KW - Flexible composite
KW - Functional sponge
UR - https://www.scopus.com/pages/publications/105012772290
U2 - 10.1016/j.mtadv.2025.100605
DO - 10.1016/j.mtadv.2025.100605
M3 - Article
AN - SCOPUS:105012772290
SN - 2590-0498
VL - 27
JO - Materials Today Advances
JF - Materials Today Advances
M1 - 100605
ER -