Because of the weak interfacial bonding between the substrates and active materials, most stretchable electronics often face the problem of performance destabilization and functional failure, especially under large strains. Herein, a super‐elastic, high conductive and core‐shell nanofibrous helix based on polyurethane (PU), silk fibroin (SF) and liquid metal (LM) is fabricated. Compared with traditional membrane, that the LM@PU/SF fibrous helix shows a wider range of workable strain (1500%) and reversible elasticity (600%) accompany with high conductivity is found. SF is acted as “glue” to strengthen the interfacial bonding between the PU and LM. The good elasticity of the helical structure and PU polymer as well as the fluidity of LM improve the stretchability, reversible elasticity and conductivity of the fibrous helix conductor. Furthermore, an alarming and monitoring apparatus using LM@PU/SF helix as the conductive unit based on multiscale fracture is engineered. This composite nanofibrous helix with ultra‐high conductivity and elasticity, making it a promising candidate for stretchable electronic devices.

中文翻译：

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具有界面键合、宽范围弹性和高导电性的可持续仿生螺旋纤维电子器件

由于基板和活性材料之间的界面结合较弱，大多数可拉伸电子产品经常面临性能不稳定和功能失效的问题，特别是在大应变下。在此，制备了一种基于聚氨酯（PU）、丝素蛋白（SF）和液态金属（LM）的超弹性、高导电性核壳纳米纤维螺旋。与传统膜相比，LM@PU/SF纤维螺旋表现出更宽的工作应变范围（1500%）和可逆弹性（600%），同时具有高电导率。 SF起到“胶水”的作用，加强PU和LM之间的界面结合。螺旋结构和PU聚合物的良好弹性以及LM的流动性提高了纤维螺旋导体的拉伸性、可逆弹性和导电性。此外，还设计了一种以LM@PU/SF螺旋为导电单元的基于多尺度断裂的报警监测装置。这种复合纳米纤维螺旋具有超高的导电性和弹性，使其成为可拉伸电子设备的有前途的候选者。