KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Republic of Korea.
George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA.
Sci Adv. 2024 Sep 6;10(36):eadp9818. doi: 10.1126/sciadv.adp9818. Epub 2024 Sep 4.
As the regenerative mechanisms of biological organisms, self-healing provides useful functions for soft electronics or associated systems. However, there have been few examples of soft electronics where all components have self-healing properties while also ensuring compatibility between components to achieve multifunctional and resilient bio-integrated electronics. Here, we introduce a stretchable, biodegradable, self-healing conductor constructed by combination of two layers: (i) synthetic self-healing elastomer and (ii) self-healing conductive composite with additives. Abundant dynamic disulfide and hydrogen bonds of the elastomer and conductive composite enable rapid and complete recovery of electrical conductivity (1000 siemens per centimeter) and stretchability (500%) in response to repetitive damages, and chemical interactions of interpenetrated polymer chains of these components facilitate robust adhesion strength, even under extreme mechanical stress. System-level demonstration of soft, self-healing electronics with diagnostic/therapeutic functions for the urinary bladder validates the possibility for versatile, practical uses in biomedical research areas.
作为生物机体的再生机制，自修复为软电子产品或相关系统提供了有用的功能。然而，在软电子产品中，很少有所有组件都具有自修复特性的例子，同时还要确保组件之间的兼容性，以实现多功能和有弹性的生物集成电子产品。在这里，我们介绍了一种由两层组成的可拉伸、可生物降解、自修复导体：（i）合成自修复弹性体和（ii）具有添加剂的自修复导电复合材料。弹性体和导电复合材料中的丰富动态二硫键和氢键使电导率（每厘米约 1000 西门子）和拉伸性（500%）能够快速且完全恢复，以应对反复的损坏，并且这些组件的互穿聚合物链的化学相互作用有助于即使在极端机械应力下也能实现强大的粘附强度。用于膀胱的具有诊断/治疗功能的软、自修复电子系统的系统级演示验证了在生物医学研究领域中具有多功能、实际用途的可能性。
