生物玻璃掺杂碳纳米纤维的制备及其形态演变规律研究

With the advantage of biological activity, bone conduction and inductivity, bioglass is widely used in various fields like tissue engineering medicine, as well as carbon nanofibers (CNFs) are also applied in these fields due to their high mechanical properties and excellent biocompatibility. In this study, the bioactive glass decorated carbon nanofibers (Bioglass@CNF) with uniform structure and stable performance have been successfully prepared by combining the process of sol-gel, electrostatic spinning and high temperature sintering. The evolution of morphology and crystal type of Bioglass@CNF under three carbonization temperatures of 800, 1000 and 1200 ℃ is systematically investigated. With carbonization temperature increasing, bioglass nanoparticles gradually migrate from inside to outside of CNFs, and the surface of the fiber transites from smoothness to roughness. At 800 ℃,bioglass remains inside CNFs along with the amorphous state, whereas almose all the bioglass migrates onto the surface of CNFs associated with wollastonite and pseudowollastonite type crystal at 1000 and 1200 ℃, respectively. Based on the LSW and Smoluchowski equations, the dynamic analysis indicates that the growth of bioglass nanoparticles conformes to the ripening mechanism at 800 ℃ and migration-coalescence mechanism at 1200 ℃, while that is predominated by both ripening and migration-coalescence mechanisms at 1000 ℃.