Related Experiment Video
Updated: Jul 16, 2026
09:37
Fabrication of a Bioactive, PCL-based "Self-fitting" Shape Memory Polymer Scaffold
Published on: October 23, 2015
Biodegradable poly(ε-caprolactone)/poly(silyl fumarate) shape memory scaffolds.
Jenlyan Negrón Hernández1, Kaley Beach2, Paola Chavarria3
1Department of Chemistry, Texas A&M University, College Station, TX, 77843, United States.
Polymer
|July 15, 2026
Summary
New biodegradable scaffolds using poly(silyl fumarate) (PSF) enhance healing of craniomaxillofacial defects. These shape memory polymer scaffolds offer improved degradation rates for better tissue regeneration.
Area of Science:
- Biomaterials Science
- Polymer Chemistry
- Tissue Engineering
Background:
- Biodegradable shape memory scaffolds are crucial for craniomaxillofacial (CMF) defect repair.
- Poly(ε-caprolactone) diacrylate (PCL-DA) scaffolds exhibit slow degradation, limiting neotissue formation.
- Previous attempts using siloxane macromers (PDMS-DMA, PMHS-DMA) improved degradation but lacked hydrolytic instability.
Purpose of the Study:
- To synthesize and evaluate poly(silyl fumarate) (PSF) as a novel, hydrolytically unstable siloxane macromer for biodegradable scaffolds.
- To create and characterize PCL/PSF co-network scaffolds for CMF defect healing.
- To assess the impact of PSF incorporation on scaffold degradation, mechanical properties, and shape memory behavior.
Main Methods:
- Poly(silyl fumarate) (PSF) was synthesized with a hydrolytically unstable backbone.
- PCL/PSF co-network scaffolds were fabricated using solvent-casting particulate leaching (SCPL) with varying PCL-DA to PSF weight ratios (90:10, 75:25, 60:40, 50:50).
- Scaffold properties including shape memory behavior, mechanical modulus, and in vitro degradation were evaluated.
Main Results:
- All PCL/PSF scaffolds maintained excellent shape memory properties.
- Scaffolds with 10% and 25% PSF retained the modulus of PCL-only and PCL/siloxane scaffolds.
- In vitro degradation increased with PSF content, with 25% PSF degrading faster than PCL/PDMS scaffolds, attributed to PSF's hydrolytic instability rather than phase separation.
Conclusions:
- PSF is a promising biodegradable siloxane macromer for developing advanced shape memory scaffolds.
- PCL/PSF scaffolds demonstrate tunable degradation rates and maintained mechanical integrity and shape memory function.
- The hydrolytic instability of PSF offers a novel strategy for accelerating scaffold degradation and promoting neotissue formation in CMF defect repair.
