摘要：Three-dimensional(3 D)printing has had a large impact on various fields,with fused deposition modeling(FDM)being the most versatile and cost-effective 3 D printing ***,FDM often requires sacrificial support structures,which significantly complicates the processing and increases the ***,poor layer-to-layer adhesion greatly affects the mechanical stability of 3D-printed ***,we present a new Print-Healing strategy to address the aforementioned challenges.A polymer ink(Cu-DOU-CPU)with synergetic triple dynamic bonds was developed to have excellent printability and room-temperature self-healing *** with various shapes were printed using a simple compact 3D printer,and readily assembled into large sophisticated architectures via *** dynamic bonds induce strong binding between ***,damaged printed objects can spontaneously heal,which significantly elongates their service *** work paves a simple and powerful way to solve the key bottlenecks in FDM 3D printing,and will have diverse applications.