Self-Bondable and Stretchable Conductive CompositeFibers with Spatially Controlled Percolated Ag NanoparticleNetworks: Novel Integration Strategy for WearableElectronics
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작성자 최고관리자 작성일 24-09-02 13:36본문
- 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.