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Fabrication and characterization of chitosan-silk fibroin/hydroxyapatite composites via in situ precipitation for bone tissue engineering

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Abstract

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 μm to 200 μm 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.

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Authors and Affiliations

  1. Key Laboratory of Analytical Chemistry for Biology and Medicine, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China

    Jing-xiao Hu, Xuan Cai, Shao-bo Mo, Li Chen, Xin-yu Shen & Hua Tong  (童华)

Authors
  1. Jing-xiao Hu
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  2. Xuan Cai
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  3. Shao-bo Mo
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  4. Li Chen
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  5. Xin-yu Shen
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  6. Hua Tong  (童华)
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Corresponding author

Correspondence to Hua Tong  (童华).

Additional information

This work was financially supported by the National Natural Science Foundation of China (Nos. 31071265 and 30900297).

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Hu, Jx., Cai, X., Mo, Sb. et al. Fabrication and characterization of chitosan-silk fibroin/hydroxyapatite composites via in situ precipitation for bone tissue engineering. Chin J Polym Sci 33, 1661–1671 (2015). https://doi.org/10.1007/s10118-015-1710-3

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  • DOI: https://doi.org/10.1007/s10118-015-1710-3

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