Affiliation:
1. School of Chemical Engineering Sungkyunkwan University (SKKU) Suwon Gyeonggi‐do Republic of Korea
2. Department of Chemical Engineering (Integrated Engineering Program) Kyung Hee University Yongin Gyeonggi Republic of Korea
3. Convergence Research Group for Meta‐Touch Korea Research Institute of Standards and Science Daejeon Republic of Korea
4. Department of Electronic Engineering Korea National University of Transportation Chungju‐si Chungbuk Republic of Korea
5. Samsung Advanced Institute for Health Sciences and Technology (SAIHST) Sungkyunkwan University Suwon Gyunggi‐do Republic of Korea
Abstract
AbstractAutonomously self‐healing, reversible, and soft adhesive microarchitectures and structured electric elements could be important features in stable and versatile bioelectronic devices adhere to complex surfaces of the human body (rough, dry, wet, and vulnerable). In this study, we propose an autonomous self‐healing multi‐layered adhesive patch inspired by the octopus, which possess self‐healing and robust adhesion properties in dry/underwater conditions. To implement autonomously self‐healing octopus‐inspired architectures, a dynamic polymer reflow model based on structural and material design suggests criteria for three‐dimensional patterning self‐healing elastomers. In addition, self‐healing multi‐layered microstructures with different moduli endows efficient self‐healing ability, human‐friendly reversible bio‐adhesion, and stable mechanical deformability. Through programmed molecular behavior of microlevel hybrid multiscale architectures, the bioinspired adhesive patch exhibited robust adhesion against rough skin surface under both dry and underwater conditions while enabling autonomous adhesion restoring performance after damaged (over 95% healing efficiency under both conditions for 24 h at 30°C). Finally, we developed a self‐healing skin‐mountable adhesive electronics with repeated attachment and minimal skin irritation by laminating thin gold electrodes on octopus‐like structures. Based on the robust adhesion and intimate contact with skin, we successfully obtained reliable measurements during dynamic motion under dry, wet, and damaged conditions.image
Funder
National Research Foundation of Korea
National Research Council of Science and Technology