Self-Bondable and Stretchable Conductive Composite Fibers with Spatially Controlled Percolated Ag Nanoparticle Networks: Novel Integration Strategy for Wearable Electronics

Chaebeen Kwon, Duhwan Seong, Jeongdae Ha, Dongwon Chun, Jee Hwan Bae, Kukro Yoon, Minkyu Lee, Janghoon Woo, Chihyeong Won, Seungmin Lee, Yongfeng Mei, Kyung In Jang, Donghee Son, Taeyoon Lee

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Advances in electronic textiles (E-textiles) for next-generation wearable electronics have originated from making a balance between electrical and mechanical properties of stretchy conductive fibers. Despite such progress, the trade-off issue is still a challenge when individual fibers are woven and/or stretched undesirably. Time-consuming fiber weaving has limited practical uses in scalable E-textiles. Here, a facile method is presented to fabricate ultra-stretchable Ag nanoparticles (AgNPs)/polyurethane (PU) hybrid conductive fibers by modulating solvent diffusion accompanied by in situ chemical reduction and adopting a tough self-healing polymer (T-SHP) as an encapsulation layer. First, the controlled diffusivity determines how formation of AgNPs is spatially distributed inside the fiber. Specifically, when a solvent with large molecular weight is used, the percolated AgNP networks exhibit the highest conductivity (30 485 S cm−1) even at 300% tensile strain and durable stretching cyclic performance without severe cracks by virtue of the efficient strain energy dissipation of T-SHP encapsulation layers. The self-bondable properties of T-SHP encapsulated fibers enables self-weavable interconnects. Using the new integration, mechanical and electrical durability of the self-bonded fiber interconnects are demonstrated while stretching biaxially. Furthermore, the self-bonding assembly is further visualized via fabrication of a complex structured E-textile.

Original languageEnglish
Article number2005447
JournalAdvanced Functional Materials
Volume30
Issue number49
DOIs
Publication statusPublished - 2020 Dec 1

Bibliographical note

Funding Information:
C.K. and D.S. contributed equally to this work. This research was supported by the National Research Foundation of Korea (NRF) funded by Ministry of Science and ICT (NRF-2017M3A7B4049466, NRF-2020R1C1C1005567), Priority Research Centers Program through the National Research Foundation of Korea (NRF-2019R1A6A1A11055660), and Yonsei-KIST Convergence Research Program (NRF-2019R1A6A1A11055660). D.S. provided informed consent prior to mounting the textile tattoo onto his skin.

Funding Information:
C.K. and D.S. contributed equally to this work. This research was supported by the National Research Foundation of Korea (NRF) funded by Ministry of Science and ICT (NRF‐2017M3A7B4049466, NRF‐2020R1C1C1005567), Priority Research Centers Program through the National Research Foundation of Korea (NRF‐2019R1A6A1A11055660), and Yonsei‐KIST Convergence Research Program (NRF‐2019R1A6A1A11055660). D.S. provided informed consent prior to mounting the textile tattoo onto his skin.

Publisher Copyright:
© 2020 Wiley-VCH GmbH

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Fingerprint

Dive into the research topics of 'Self-Bondable and Stretchable Conductive Composite Fibers with Spatially Controlled Percolated Ag Nanoparticle Networks: Novel Integration Strategy for Wearable Electronics'. Together they form a unique fingerprint.

Cite this