With advantages of exceptional mechanical properties, larger surface and prominent surface effect, etc, carbon fibers (CNFs) have been increasingly proposed in the fields of bone repairing and bone scaffold materials [1-2]. Initially, CNFs were proved to promote the proliferation and adhesion of osteoblast by Webster TJ et al. [3], and were considered as potential materials in bone regeneration. However, CNFs could not be discharged from human body due to their bio-inert characteristics. Our previous works showed that CNFs decorated with bioactive inorganic components like (3-TCP were degradable and the aggregation behavior of the inorganic particles during carbonization was strongly related with the bioactivity of hybrid fibers [4,5]. Specifically, bioactive glass (BG) was extensively applied as inorganic bone repairing materials with excellent bioactivity [6], implying the great biological potential of BG decorated CNFs. Therefore, it is highly desirable to study the crystallization and coarsening of bioactive glass during carbonization, which was the prerequisites of enhancing bioactivity of the hybrid fibers.
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