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Modulation, functionality, and cytocompatibility of three-dimensional printing materials made from chitosan-based
1Department of Chemical and Biochemical Engineering, Kao Yuan University, Kaohsiung County 82101, Taiwan, ROC.
Materials Science & Engineering. C, Materials for Biological Applications
|September 11, 2016
Summary
Researchers developed new 3D printing composite materials using polylactide (PLA) and chitosan (CS). Grafting maleic anhydride onto PLA significantly improved mechanical properties, water resistance, and antibacterial activity, while maintaining cytocompatibility.
Area of Science:
- Biomaterials Science
- Polymer Chemistry
- Additive Manufacturing
Background:
- Developing advanced composite materials for 3D printing requires optimizing mechanical properties, biocompatibility, and functionality.
- Polylactide (PLA) and chitosan (CS) are biocompatible polymers with potential for biomedical applications, but their direct composite properties can be limited.
- Surface modification of polymers can enhance interfacial compatibility and material performance.
Purpose of the Study:
- To evaluate the mechanical properties, cytocompatibility, and fabrication of 3D printed composite strips made from polylactide (PLA) and chitosan (CS).
- To investigate the effect of maleic anhydride grafting onto PLA (PLA-g-MA) on the characteristics of PLA/CS composites.
- To assess the antibacterial activity and water resistance of the developed composite materials.
Main Methods:
- Fabrication of 3D printing composite strips using PLA/CS and PLA-g-MA/CS formulations.
- Mechanical property testing (e.g., tensile strength, stiffness) of the composite strips.
- Cytocompatibility assessment using human foreskin fibroblasts (FBs).
- Evaluation of water resistance and antibacterial activity against relevant microorganisms.
Main Results:
- PLA-g-MA/CS composites demonstrated superior mechanical properties compared to unmodified PLA/CS composites, attributed to enhanced polymer compatibility.
- The water resistance of PLA-g-MA/CS composites was significantly improved over PLA/CS composites.
- Both PLA/CS and PLA-g-MA/CS composites exhibited non-toxic behavior towards human foreskin fibroblasts.
- Chitosan incorporation effectively enhanced the inherent antibacterial properties of both PLA and PLA-g-MA based composites.
Conclusions:
- Grafting maleic anhydride onto PLA is an effective strategy to improve the mechanical performance and water resistance of PLA/CS composites for 3D printing.
- The developed PLA-g-MA/CS composites are cytocompatible and possess enhanced antibacterial activity, indicating their potential for biomedical applications.
- These findings highlight the potential of modified biopolymer composites in advanced additive manufacturing for tissue engineering and regenerative medicine scaffolds.
