Multifunctional electronic textiles by direct 3D printing of stretchable conductive fibers

The integration of functional fibers into wearable devices by traditional methods is commonly completed in weaving. A new post-weaving method of integrating fiber devices into textiles is needed to address the challenge of incorporating functional fiber into ready-made garments without tearing down...

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Bibliographic Details
Main Authors: Wang, Yuntian, Wang, Zhixun, Wang, Zhe, Xiong, Ting, Shum, Perry Ping, Wei, Lei
Other Authors: School of Electrical and Electronic Engineering
Format: Article
Language:English
Published: 2023
Subjects:
Online Access:https://hdl.handle.net/10356/166267
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Institution: Nanyang Technological University
Language: English
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Summary:The integration of functional fibers into wearable devices by traditional methods is commonly completed in weaving. A new post-weaving method of integrating fiber devices into textiles is needed to address the challenge of incorporating functional fiber into ready-made garments without tearing down the clothing and re-weaving. A 3D printing method to simultaneously fabricate and integrate highly stretchable conductive fiber into ready-made garments with designed patterns is presented. The fabricated sheath–core fiber consists of a styrene–ethylene–butylene–styrene (SEBS) shell and a Ga–In–Sn alloy liquid metal core. The SEBS shell guarantees the high stretchability (up to 600%) and flexibility, while the liquid metal core offers a high conductivity maintained at large deformation. It is shown that sophisticated patterns, which have millimeter-level-resolution that are difficult to be integrated into textiles by weaving, and even more laborious to be incorporated into ready-made garments, can now be easily modified and implemented into both textiles and ready-made garments by a time-saving and low-cost 3D printing method. Utilizing the electrical characteristics of the fiber in pre-designed patterns, on-clothing soft electronics can be printed directly. A printed on-clothing strain sensor, bending sensor, wireless charging coil, and a touch-sensing network are demonstrated to show the potential applications in wearable electronics.