School of Materials Science and Engineering, Key Lab of Guangdong Province for High Property and Functional Macromolecular Materials, South China University of Technology, Guangzhou, 510641, P. R. China.
School of Chemistry & Chemical Engineering, Anhui University, Hefei, Anhui, 230601, P. R. China.
Mater Horiz. 2024 Apr 22;11(8):1923-1933. doi: 10.1039/d3mh01975f.
Self-healing and self-adhesion capacities are essential for many modern applications such as skin-interfaced electronics for improving longevity and reliability. However, the self-healing efficiency and adhesive toughness of most synthetic polymers are limited to their original network, making reliability under dynamic deformation still challenging. Herein, inspired by the growth of living organisms, a highly stretchable supramolecular elastomer based on thermo-responsive ion clusters and a dynamic polysulfide backbone was developed. Attributed to the synergic growth of ion clusters and dynamic exchange of disulfide bonds, the elastomer exhibited unique healing strengthening (healing efficiency >200%) and thermo-enhanced tough adhesion (interfacial toughness >500 J m) performances. To prove its practical application in highly reliable skin electronics, we further composited the elastomer with a zwitterion to prepare a highly conductive ionic elastomer and applied it in wearable strain sensing and long-term electrophysiological detection. This work provides a new avenue to realize high reliability in skin interfaced electronics.
自修复和自粘附能力对于许多现代应用至关重要，例如用于提高耐用性和可靠性的皮肤界面电子设备。然而，大多数合成聚合物的自修复效率和粘附韧性都限于其原始网络，这使得在动态变形下的可靠性仍然具有挑战性。受生物体生长的启发，开发了一种基于热响应离子簇和动态多硫化物主链的高拉伸超分子弹性体。由于离子簇的协同生长和二硫键的动态交换，弹性体表现出独特的愈合强化（愈合效率>200%）和热增强韧性粘附（界面韧性>500J m）性能。为了证明其在高可靠性皮肤电子设备中的实际应用，我们进一步将弹性体与两性离子复合，制备了一种高导电性离子弹性体，并将其应用于可穿戴应变传感和长期生理电检测。这项工作为实现皮肤界面电子设备的高可靠性提供了新途径。
