Graphene‐Coated Spandex Sensors Embedded into Silicone Sheath for Composites Health Monitoring and Wearable Applications

摘要: This study presents a low-cost, tunable, and stretchable sensor fabricated based on spandex (SpX) yarns coated with graphene nanoplatelets (GnP) through dip-coating process. The SpX/GnP is wrapped into silicone rubber (SR) sheath to protect the conductive layer against harsh conditions, which allows for fabricating washable wearable sensors. Dip-coating parameters are optimized obtain maximum GnP coating rate. covering tailored achieve high stretchability beyond sensing limit of 104% SpX/GnP/SR Adjustable sensitivity attained by manipulating SpX immersion times broadening its application wide range strains: Gauge factors as two orders magnitude achieved at tensile strains greater than ≈40%. sensors tested applications: First, integrated composite fabrics (with no negative impact structural integrity part) screening yarn displacements, resin flow, solidification during hot press forming process, health monitoring under mechanical loads minimal cross-sensitivity temperature/humidity. Second, capability SpX/GnP/SP in detection bodily motions (from joint motion arterial blood pressure) demonstrated.