PUBLICATION

Bio-integrated Electronics Lab.

Cover

Self-Bondable and Stretchable Conductive CompositeFibers with Spatially Controlled Percolated Ag NanoparticleNetworks: Novel Integration Strategy for WearableElectronics

페이지 정보

작성자 최고관리자 작성일 24-09-02 13:36

본문

Author
Chaebeen Kwon, Duhwan Seong, Jeongdae Ha, Dongwon Chun, Jee-Hwan Bae,Kukro Yoon, Minkyu Lee, ... ,Kyung-In Jang, Donghee Son, and Taeyoon Lee
Journal
Advanced functional materials
Vol
30(49)
Page
2005447

Advances in electronic textiles (E-textiles) for next-generation wearableelectronics have originated from making a balance between electrical andmechanical properties of stretchy conductive fibers. Despite such progress,the trade-off issue is still a challenge when individual fibers are wovenand/or stretched undesirably. Time-consuming fiber weaving has limitedpractical uses in scalable E-textiles. Here, a facile method is presented tofabricate ultra-stretchable Ag nanoparticles (AgNPs)/polyurethane (PU)hybrid conductive fibers by modulating solvent diffusion accompanied by insitu chemical reduction and adopting a tough self-healing polymer (T-SHP)as an encapsulation layer. First, the controlled diffusivity determines howformation of AgNPs is spatially distributed inside the fiber. Specifically,when a solvent with large molecular weight is used, the percolatedAgNP networks exhibit the highest conductivity (30 485 S cm−1 ) even at300% tensile strain and durable stretching cyclic performance withoutsevere cracks by virtue of the efficient strain energy dissipation of T-SHPencapsulation layers. The self-bondable properties of T-SHP encapsulatedfibers enables self-weavable interconnects. Using the new integration,mechanical and electrical durability of the self-bonded fiber interconnectsare demonstrated while stretching biaxially. Furthermore, the self-bondingassembly is further visualized via fabrication of a complex structuredE-textile.