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Complex Impedance and Modulus Analysis on Porous and Non-Porous Scaffold Composites Due to Effect of
Chong You Beh1, Ee Meng Cheng2,3, Xiao Jian Tan4,5,6
1Department of Engineering and Built Environment, Tunku Abdul Rahman University of Management and Technology, Penang Branch, Pulau Pinang 11200, Malaysia.
Polymers
|January 21, 2023
Summary
This study reveals that higher starch content and porous structures in hydroxyapatite/starch bone scaffolds significantly improve electrical responses. These findings offer insights into tailoring scaffold properties for enhanced functionality.
Area of Science:
- Biomaterials Science
- Materials Science
- Electrical Engineering
Background:
- Hydroxyapatite/starch composites are explored for bone scaffold applications.
- Understanding their electrical properties is crucial for functional applications.
Purpose of the Study:
- To investigate the electrical responses (complex modulus, impedance) of hydroxyapatite/starch bone scaffolds.
- To correlate electrical properties with varying hydroxyapatite/starch proportions and microstructural features.
Main Methods:
- Fabrication of non-porous and porous hydroxyapatite/starch composites with diverse wt/wt% ratios.
- Microstructural analysis using scanning electron microscopy (SEM).
- Dielectric spectroscopy (5 MHz to 12 GHz) for electrical response analysis.
Main Results:
- High starch proportions promote hierarchical porous microstructures with increased porosity.
- Electrical responses are frequency, proportion, and microstructure-dependent.
- Enhanced electrical responses observed with higher starch content and porosity.
Conclusions:
- Material proportion and microstructure significantly influence the electrical conduction mechanism.
- The electrical properties of hydroxyapatite/starch composites can be tuned by adjusting composition and microstructure.
- Equivalent electrical circuit models can indirectly reflect material and microstructural characteristics.
