科研之友
微信
新浪微博
Facebook
分享链接
摘要
Homogeneous chitosan-silk fibroin/hydroxyapatite (CS-SF/HA) composites were prepared by in situ precipitation method driven by a multiple-order template. The morphology of the composites was investigated by scanning electron microscope (SEM) and transmission electron microscope (TEM). The compositional analysis was carried out by X-ray diffraction analysis (XRD) and Fourier transformed infrared spectroscopy (FTIR). The mechanical properties and biocompatibility of the composites were also determined. The results indicated that the inorganic particles of uniform size (50 nm) were well-dispersed among the CS-SF matrices. The compressive modulus of the CS-SF/HA composites was enhanced with the increasing amount of SF. The in vitro results suggested that the MC3T3-E1 osteoblast-like cells on CS-SF/HA composite disks displayed strong bonding and spreading, and the cell proliferation cultured on each composite disk increased throughout the culture period for up to 7 days. Especially, the samples with higher content of SF had much better biological properties. The evidences proved that the CS-SF/HA composites possessed excellent biocompatibility. By using the freeze-drying technique, hierarchical porous scaffolds with pores ranging from 50 mu m to 200 mu m were obtained. This work presented the advantages of in situ precipitation method to prepare the organic/inorganic composites, and a multiple-order template was introduced in the system to improve the properties of the composites by combining the merits of each organic template.
- 出版日期2015-12
- 单位武汉大学
