Intercalated chitosan/hydroxyapatite nanocomposites: Promising materials for bone tissue engineering applications

Area of Science:

• Biomaterials Science
• Nanotechnology
• Materials Chemistry

Background:

• Chitosan (CS) and hydroxyapatite (HA) are widely studied for biomedical applications.
• Developing advanced nanocomposites with controlled structures is crucial for tissue engineering.

Purpose of the Study:

• To prepare and characterize chitosan/hydroxyapatite (CS/HA) nanocomposites with an intercalated structure.
• To evaluate the potential of these CS/HA nanocomposites for bone tissue engineering applications.

Main Methods:

• Hydroxyapatite (HA) synthesized via sol-gel process; formic acid used as a solvent for stable nano-HA dispersions.
• CS/HA nanocomposite films prepared with varying HA content (5-20 wt%) using solvent casting.
• Characterization using SEM, AFM, EDX, FTIR, XRD, and TGA.

Main Results:

• Homogeneous CS/HA nanocomposites with uniformly distributed nano-HA particles formed via self-assembly.
• XRD and SEM confirmed a layered nanocomposite structure.
• TGA revealed complete chitosan degradation, yielding nanoporous 3D scaffolds containing HA and other calcium phosphates.

Conclusions:

• CS/HA nanocomposites with an intercalated structure were successfully prepared.
• The developed materials show potential as scaffolds for bone tissue engineering due to their composition and porous structure.