biostudies-literatureLian HGuangdong Basic and Applied Basic Research FoundationNational Natural Science Foundation of ChinaScience and Technology Planning Project of ZhanjiangSpecial Fund for Science and Technology Innovation Strategy of Guangdong Province1247https://www.ebi.ac.uk/biostudies/studies/S-EPMC9416005biostudies-literatureUnknown13(8)High-performance flexible strain sensors with a low cost, simple structure, and large-scale fabrication methods have a high demand in soft robotics, wearable devices, and health monitoring. Here, a direct-ink-writing-based 3D printing method, which fabricates structural layers in an efficient, layered manner, was developed to fabricate a stretchable and flexible strain sensor composed of carbon black/silicone elastomer (CB/PDMS) composites as the strain-sensing elements and electrodes. As the sensing element, the CB/PDMS composite had a sensitivity of 5.696 in the linear strain detection range of 0 to 60%, with good stability and low hysteresis. The flexible strain sensor demonstrates potential in monitoring various human motions, including large deformation motions of the human body, and muscle motions with facial micro-expressions.MicromachinesThree-Dimensional Printed Carbon Black/PDMS Composite Flexible Strain Sensor for Human Motion Monitoring.PMC9416005pdjh2022b0316Nos.2021A05235, 2020A01044Nos.2022A1515011108, 2019A1515110637 and 2020A151501116452005239Mo DLian HCui ZXue MMa KChen XWang LfalseThree-Dimensional Printed Carbon Black/PDMS Composite Flexible Strain Sensor for Human Motion Monitoring.High-performance flexible strain sensors with a low cost, simple structure, and large-scale fabrication methods have a high demand in soft robotics, wearable devices, and health monitoring. Here, a direct-ink-writing-based 3D printing method, which fabricates structural layers in an efficient, layered manner, was developed to fabricate a stretchable and flexible strain sensor composed of carbon black/silicone elastomer (CB/PDMS) composites as the strain-sensing elements and electrodes. As the sensing element, the CB/PDMS composite had a sensitivity of 5.696 in the linear strain detection range of 0 to 60%, with good stability and low hysteresis. The flexible strain sensor demonstrates potential in monitoring various human motions, including large deformation motions of the human body, and muscle motions with facial micro-expressions.2022-01-01T00:00:00Z2022 Aug2025-04-04T19:27:46.326Z2025-04-04T19:27:46.326ZS-EPMC94160053601416910.3390/mi13081247