Layered co-continuous structure in bone scaffold fabricated by laser additive manufacturing for enhancing electro-responsive shape memory properties

• DOI: 10.1016/j.jmrt.2024.03.050
• Publication Date: 2024-03-11T01:25:20Z
• Authors: Cijun Shuai; Wentao Xu; Haofan He; Feng Yang; Jinglin Liu; Pei Feng
• Keywords: Selective Laser Melting

Porous scaffold based on electro-responsive shape memory polymers (ESMPs) possesses great potential applications in minimally invasive surgery for bone defect repair because it provides the ability remote control and internal heating. However, it's difficult to obtain co-continuous structure achieving excellent properties. In this study, layered with thermoplastic polyurethane (TPU) loaded multi-walled carbon nanotubes (MWCNTs) (referred as cTPU) layer l-polylactic acid (PLLA) alternate stacking was obtained via layer-by-layer fabrication technology, porous fabricated selective laser sintering (SLS). The thermal electrical properties of scaffolds different contents MWCNT were evaluated by dynamic mechanical analysis (DMA) U-bending experiments. results indicated that improved phase continuity confined MWCNTs one side, enhancing electrically driven 1.5 wt% achieved fixed recovery rates 95.6% 90.2%, respectively. With further increasing content, decreased due agglomeration cTPU phase, which affected cTPU. DMA confirmed good scaffold, cell culture experiment demonstrated cytocompatibility attachment growth. This work a feasible method fabricate structure, exhibits repair.