Thermally Drawn Multi‑material Fibers Based on Polymer Nanocomposite for Continuous Temperature Sensing  

作　　者：Woo Mi Ryu Yunheum Lee Yeonzu Son Geonho Park Seongjun Park 

机构地区：[1]Department of Bio and Brain Engineering,Korea Advanced Institute of Science and Technology(KAIST),Daejeon 34141,South Korea [2]Program of Brain and Cognitive Engineering,Korea Advanced Institute of Science and Technology(KAIST),Daejeon 34141,South Korea [3]Department of Chemical and Biomolecular Engineering,Korea Advanced Institute of Science and Technology(KAIST),Daejeon 34141,South Korea [4]KAIST Institute for NanoCentury,Korea Advanced Institute of Science and Technology(KAIST),Daejeon 34141,South Korea [5]KAIST Institute for Health Science and Technology,Korea Advanced Institute of Science and Technology(KAIST),Daejeon 34141,South Korea

出　　处：《Advanced Fiber Materials》2023年第5期1712-1724,共13页先进纤维材料（英文）

基　　金：supported by National Research Foundation of Korea(NRF)funded by the Ministry of Science and ICT(2021M3F3A2A01037365,RS-2023-00207970);KAINEET Institute Seed Money Project,Post-AI Research Institute.

摘　　要：With increasing personalized healthcare,fiber-based wearable temperature sensors that can be incorporated into textiles have attracted more attention in the field of wearable electronics.Here,we present a flexible,well-passivated,polymer–nanocomposite–based fiber temperature sensor fabricated by a thermal drawing process of multiple materials.We engineered a preform to optimize material processability and sensor performance by considering the rheological and functional properties of the preform materials.The fiber temperature sensor consisted of a temperature-sensing core made from a conductive polymer composite of thermoplastic polylactic acid,a conductive carbon filler,reduced graphene oxide,and a highly flexible linear low-density polyethylene passivation layer.Our fiber temperature sensor exhibited adequate sensitivity(−0.285%/℃)within a temperature range of 25–45℃with rapid response and recovery times of 11.6 and 14.8 s,respectively.In addition,it demonstrated a consistent and reliable temperature response under repeated mechanical and chemical stresses,which satisfied the requirements for the long-term application of wearable fiber sensors.Furthermore,the fiber temperature sensor sewn onto a daily cloth and hand glove exhibited a highly stable performance in response to body temperature changes and temperature detection by touch.These results indicate the great potential of this sensor for applications in wearable,electronic skin,and other biomedical devices.

关 键 词：Fiber temperature sensor Wearable device Thermal drawing process Multi-material thermal drawing conductive polymer composite 

分 类 号：TB33[一般工业技术—材料科学与工程]