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Synthesis of Graphene-Hydroxyapatite Nanocomposites for Potential Use in Bone Tissue Engineering
Published on: July 27, 2022
Novel poly(hydroxyalkanoates)-based composites containing Bioglass® and calcium sulfate for bone tissue engineering
J M García-García1, L Garrido, I Quijada-Garrido
1Department of Materials Science and Engineering, Institute of Biomaterials, University of Erlangen-Nuremberg, Cauerstraße 6, D-91058 Erlangen, Germany.
Biomedical Materials (Bristol, England)
|September 14, 2012
Summary
New biodegradable composites were created using poly(hydroxyalkanoates) (PHAs) and bioactive fillers. These materials show tunable mechanical properties and enhanced bioactivity for potential biomedical applications.
Area of Science:
- Biomaterials Science
- Polymer Chemistry
- Biotechnology
Background:
- Poly(hydroxyalkanoates) (PHAs) are biodegradable polymers with potential for biomedical applications.
- Developing PHAs with tailored properties and bioactivity is crucial for advanced material design.
- Combining PHAs with bioactive fillers can enhance their performance and biocompatibility.
Purpose of the Study:
- To fabricate and characterize novel PHA-based composites using bioactive glass and calcium sulfate dihydrate.
- To investigate the influence of filler type and content on the physical properties and bioactivity of the composites.
- To assess the hydroxyapatite formation and bioactivity of the developed materials in simulated body fluid.
Main Methods:
- Polymer synthesis and composite fabrication.
- Differential scanning calorimetry (DSC) for thermal analysis.
- Dynamic mechanical thermal analysis (DMTA) and tensile testing for mechanical properties.
- Scanning electron microscopy (SEM) for particle distribution analysis.
- Contact angle measurements and Raman spectroscopy for surface characterization.
- Immersion in simulated body fluid (SBF) to assess hydroxyapatite (HA) formation.
Main Results:
- Addition of fillers significantly affected the thermal and mechanical properties of the PHA composites.
- Particle distribution within the polymer matrix correlated directly with mechanical performance.
- Surface hydrophilicity increased with filler incorporation, enhancing bioactivity.
- Hydroxyapatite (HA) formation in SBF was dependent on PHA type, filler content, and immersion time.
- PHBHHx composites demonstrated controllable HA formation over time.
Conclusions:
- The developed PHA composites exhibit promising tunable mechanical properties and enhanced bioactivity.
- The choice of PHA copolymer and filler combination influences material characteristics and bioactivity.
- These composites hold potential for applications requiring bioactive and biodegradable materials.
- Controlled hydroxyapatite formation suggests suitability for bone regeneration or tissue engineering scaffolds.
