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Benefits of Polydopamine as Particle/Matrix Interface in Polylactide/PD-BaSO4 Scaffolds
Naroa Sadaba1, Aitor Larrañaga1,2, Gemma Orpella-Aceret2
1Department of Mining-Metallurgy Engineering and Materials Science, School of Engineering EIB 1, University of the Basque Country (UPV/EHU) and Polymat, 48013 Bilbao, Spain.
International Journal of Molecular Sciences
|August 6, 2020
Summary
This study shows polydopamine (PD) coating on barium sulfate particles enhances polylactide (PLA) composites. These biocompatible, 3D-printable materials offer improved strength and drug delivery for bone fixation devices.
Area of Science:
- Biomaterials Science
- Polymer Chemistry
- Nanotechnology
Background:
- Polylactide (PLA) is a biodegradable polymer with potential in biomedical applications.
- Enhancing the mechanical properties and functionality of PLA composites is crucial for advanced medical devices.
- Polydopamine (PD) is a versatile coating known for its adhesive and functional properties.
Purpose of the Study:
- To investigate the use of polydopamine (PD) as a coating for barium sulfate (BaSO4) particles within a polylactide (PLA) matrix.
- To develop a biodegradable, X-ray opaque composite material with improved mechanical strength and drug delivery capabilities.
- To assess the biocompatibility and 3D printability of the developed composite for potential bone fixation devices.
Main Methods:
- Functionalization of barium sulfate particles with polydopamine.
- Integration of PD-functionalized BaSO4 particles into a polylactide matrix to form composite materials.
- Characterization of material properties, including mechanical strength, X-ray opacity, drug adsorption/release, and in vitro biocompatibility (cytotoxicity, cell proliferation).
- Evaluation of the material's suitability for 3D printing complex structures.
Main Results:
- Polydopamine coating significantly increased the particle-matrix interface strength in the PLA composite.
- The functionalized BaSO4 particles facilitated the adsorption and release of the antibiotic levofloxacin.
- The resulting biodegradable composite was X-ray opaque, exhibited enhanced mechanical properties, and was non-cytotoxic to human dermal fibroblasts in vitro.
- The material demonstrated successful 3D printing for fabricating complex shapes.
Conclusions:
- Polydopamine-functionalized barium sulfate particles are effective in enhancing polylactide composites.
- These novel composites offer a promising combination of biodegradability, X-ray opacity, mechanical integrity, and drug delivery capabilities.
- The developed materials are suitable for 3D printing and show potential for use in biocompatible bone fixation devices.
