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Preparation and characterization of nano-hydroxyapatite/chitosan/konjac glucomannan composite
Gang Zhou1,2, Yubao Li1, Li Zhang1
1Research Center for Nano-Biomaterials, Analytical and Testing Center, Sichuan University, Chengdu 610064, China.
Journal of Biomedical Materials Research. Part A
|June 15, 2007
Summary
A novel nano-hydroxyapatite (n-HA)/chitosan (CS)/konjac glucomannan (KGM) composite shows promising potential for drug delivery systems. Its tunable degradation rate offers control over drug release, making it suitable for implants.
Area of Science:
- Biomaterials Science
- Nanotechnology
- Polymer Chemistry
Background:
- Biocompatible composite materials are crucial for advanced biomedical applications, including drug delivery.
- Controlling the degradation rate of implantable materials is essential for effective drug release profiles.
- Nano-hydroxyapatite (n-HA), chitosan (CS), and konjac glucomannan (KGM) are individually recognized for their biocompatibility and potential in biomedical fields.
Purpose of the Study:
- To synthesize and characterize a novel composite material using n-HA, CS, and KGM.
- To evaluate the in vitro degradation behavior and bioactivity of the n-HA/CS/KGM composite.
- To explore the potential of this composite as a carrier for implantable drug delivery systems.
Main Methods:
- Coprecipitation method was employed for composite synthesis.
- Material characterization included thermal analysis (TGA/DTA), FTIR, XRD, ICP, SEM, and EDX.
- In vitro degradation studies were performed in simulated body fluid (SBF).
Main Results:
- The n-HA, CS, and KGM phases were found to be closely integrated within the composite structure.
- In vitro immersion in SBF led to surface pore formation and the precipitation of calcium and phosphate-containing substances.
- Significant weight loss and high degradation rates were observed in SBF, indicating good biodegradability.
- Changes in SBF ion concentrations (Ca and P) confirmed material degradation.
Conclusions:
- The synthesized n-HA/CS/KGM composite exhibits excellent integration of its components and favorable in vitro degradation characteristics.
- The composite demonstrates potential as a carrier for implantable drug delivery systems.
- Adjusting the CS/KGM ratio offers a method to modulate the composite's biodegradation and drug release rates, providing a pathway for controlled therapeutic delivery.
