Continuous manufacture of stretchable and integratable thermoelectric nanofiber yarn for human body energy harvesting and self-powered motion detection

被引:115
作者
He, Xinyang [1 ]
Gu, Jiatai [1 ]
Hao, Yunna [1 ]
Zheng, Maorong [1 ]
Wang, Liming [1 ]
Yu, Jianyong [2 ]
Qin, Xiaohong [1 ]
机构
[1] Donghua Univ, Coll Text, Key Lab Text Sci & Technol, Minist Educ, Shanghai 201620, Peoples R China
[2] Donghua Univ, Innovat Ctr Text Sci & Technol, Shanghai 201620, Peoples R China
基金
中国国家自然科学基金;
关键词
Stretchable thermoelectrics; Coagulation-bath electrospinning; Self-assembly strategies; Nanofiber yarn; Self-powered sensors; COMPOSITE FIBERS; POLYURETHANE; HYBRIDS;
D O I
10.1016/j.cej.2022.137937
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Thermoelectric conversion technology provides a new method for directly collecting and converting the heat released by the human body to electrical energy, which has attracted extensive attention in the field of smart wearable electronics. However, current thermoelectric materials for wearable thermoelectric devices often face problems such as air impermeability, large volume, poor integration, and limited stretchability. Herein, an advanced fabrication approach combining coagulation-bath electrospinning and self-assembly strategies is proposed to efficiently and continuously fabricate CNT/PEDOT:PSS thermoelectric nanofiber yarns with high stretchability (similar to 350%) and seamability. During the spinning process, the nonsolvent induced phase separation and self-assembly effect result in a large amount of CNT/PEDOT:PSS loaded on each individual nanofiber. Since the thermoelectric material is loaded inside the yarn rather than simply coated on the surface, it exhibits excellent mechanical stability. In addition, based on the thermoelectric effect and seamability of the yarns, they can be integrated into gloves and masks for cold/heat source identification and human respiration monitoring in self-powered mode. Moreover, the self-powered strain sensor composed of the yarn shows corresponding thermovoltage changes for different strains, which can be used to optimize basketball players' shooting percentage. These unique features make the thermoelectric nanofiber yarn show broad prospects in smart wearable fields such as wearable generators, breathing monitoring, and exercise optimization.
引用
收藏
页数:10
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