Details

Autor(en) / Beteiligte

• Zuo, Han
• Liu, Zenghe
• Zhang, Luzhi
• Liu, Gengxin
• Ouyang, Xikai
• Guan, Qingbao
• Wu, Qilin
• You, Zhengwei

Titel

Self-healing materials enable free-standing seamless large-scale 3D printing

Ist Teil von

• Science China materials, 2021-07, Vol.64 (7), p.1791-1800

Ort / Verlag

Beijing: Science China Press

Erscheinungsjahr

2021

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Three-dimensional (3D) printing has had a large impact on various fields, with fused deposition modeling (FDM) being the most versatile and cost-effective 3D printing technology. However, FDM often requires sacrificial support structures, which significantly complicates the processing and increases the cost. Furthermore, poor layer-to-layer adhesion greatly affects the mechanical stability of 3D-printed objects. Here, 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 ability. Objects with various shapes were printed using a simple compact 3D printer, and readily assembled into large sophisticated architectures via self-healing. Triple dynamic bonds induce strong binding between layers. Additionally, damaged printed objects can spontaneously heal, which significantly elongates their service life. This work paves a simple and powerful way to solve the key bottlenecks in FDM 3D printing, and will have diverse applications.