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Updated: Mar 14, 2026
Fabrication of a Bioactive, PCL-based "Self-fitting" Shape Memory Polymer Scaffold
Published on: October 23, 2015
New Generation of Tunable Bioactive Shape Memory Mats Integrated with Genetically Engineered Proteins
Xiaowen Wu1,2, Suntharavathanan Mahalingam2, Sarah Kay VanOosten3
1Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, 29 Xueyuan Road, Beijing, 100083, China.
Researchers created advanced polymer fibers using a novel method. These fibers integrate bioactive peptides for self-assembling hydroxyapatite, enabling programmable shape memory properties and a soft-hard material transition.
Area of Science:
- Biomaterials Engineering
- Polymer Science
- Tissue Engineering
Background:
- Developing advanced biomaterials with tunable properties is crucial for regenerative medicine.
- Integrating bioactive components into polymer scaffolds can enhance their functionality.
- Controlling mineralization within scaffolds is key for mimicking natural tissue structures.
Purpose of the Study:
- To prepare aligned poly(l-lactide)/poly(methyl methacrylate) fibers and mats.
- To investigate the self-directed integration of hydroxyapatite nanoparticles using a bioactive peptide.
- To explore the effect of processing parameters on morphology and shape memory properties.
Main Methods:
- Pressurized gyration was used to fabricate aligned polymer blend fibers and mats.
- A chimeric green fluorescence protein with a hydroxyapatite-binding peptide was genetically engineered.
- Fluorescence microscopy, Fourier transform infrared spectroscopy (FTIR), and Raman spectroscopy were employed for analysis.
- Enzyme-based remineralization assays were conducted.
Main Results:
- Successful integration of hydroxyapatite nanoparticles into the fiber assembly was achieved through peptide-mediated self-assembly.
- Fluorescence microscopy and FTIR confirmed the successful incorporation of the chimeric protein.
- Spectral changes indicated a soft-hard material transition following peptide-mediated mineralization.
- Programmable shape memory properties were observed in the functionalized fibers.
Conclusions:
- Genetically engineered bioactive peptides can direct hydroxyapatite mineralization within polymer fibers.
- This approach enables the creation of advanced biomaterials with tunable mechanical and shape memory properties.
- The developed fibers show potential for applications in regenerative medicine and soft-hard tissue engineering.
