Abstract
This study conducts a comprehensive assessment of shape memory polyurethane (SMPU) composite foams with isocyanate-modified hydroxyapatite (imHA) nanoparticles in terms of their pore structures, mechanical properties, shape memory effects and biocompatibility in vitro. The results obtained in the research reveal the effectiveness of imHA nanoparticles in SMPU foams as inorganic cross-linking fillers, which contribute to the enhancement of mechanical properties and shape memory performance. Pore structures and compressive properties are simultaneously optimized when imHA content increases. The imHA enhanced SMPU foam could be adopted as a promising alternative for overcoming the disadvantages of traditional polymer scaffolds, such as insufficient mechanical properties, inadequate pore structure, low bioactivity and inconvenience in operation for bone regeneration.
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