Carbonized sunflower core based strain sensor for monitoring human motion. Issue 4 (5th February 2022)

• Record Type: Journal Article
• Authors: Liu, Liang; Li, Siyu; Zhao, Chunxia; Chen, Yunxin; Han, Jin; Li, Yuntao; Xiang, Dong; Li, Hui; Guo, Min
• Is Part Of: Polymer engineering & science. Volume 62:Issue 4(2022)
• Page Start: 1061
• Page End: 1069
• Publication Date: 2022-02-05
• Subjects: biomaterials -- carbon materials -- electrical properties -- sensors; Polymer engineering -- Periodicals; Polymers -- Periodicals; 668.9
• DOI: 10.1002/pen.25906
• Languages: English
• ISSNs: 0032-3888

Abstract

Abstract: Strain sensors with high flexibility and sensitivity have gained significant research attention for wide applications in real‐time monitoring, human‐machine interactions and robot arms. Herein, the carbonized natural sunflower core (SFC) was encapsulated by polydimethylsiloxane (PDMS) to fabricate a highly flexible strain sensor. In addition to the low‐cost and facile synthesis, the as‐prepared strain sensor demonstrated large sensitivity (maximum GF value of 48.1 at 40%–50% strain), excellent response range (0.5%–100%), and high stability and durability (more than 1000 cycles under repeated loading/releasing of 0.1% tensile strain). The excellent sensing performance could be realized under both compression and stress/strain format. Moreover, the as‐prepared flexible strain sensor could measure human movements, including tiny expression and vigorous joint motions, displaying great potential and promising applications in wearable devices. Abstract : A facile, environmental‐friendly and flexible strain sensor was prepared by using carbonized SFC combining with PDMS. It could measure vigorous joint movements, such as wrist movement and human tiny expressions, that is, smiling and blinking. The prepared senor hold great potential applications in the field of smart wearable devices and human‐machine interfaces.