Emulsion templating of PCL:PGS methacrylate blends for soft tissue engineering

Area of Science:

• Biomaterials Science
• Polymer Chemistry
• Tissue Engineering

Background:

• Polycaprolactone (PCL) and poly (glycerol sebacate) (PGS) are biodegradable polymers used for porous structures via high internal phase emulsion (HIPE) templating.
• PCL requires surface treatment for cell infiltration, challenging for complex geometries.
• PGS's soft nature causes porous structure collapse during processing.

Purpose of the Study:

• To develop methacrylated PCL (PCL-M) and PGS (PGS-M) blends for tailorable porous scaffolds.
• To overcome individual PCL and PGS limitations in tissue engineering applications.
• To create materials supporting cell growth and extracellular matrix deposition.

Main Methods:

• Methacrylated PCL (PCL-M) and PGS (PGS-M) were blended in various ratios.
• High internal phase emulsion (HIPE) templating was used to create porous PolyHIPEs.
• Material properties were characterized using mechanical testing, SEM imaging, resazurin assay, and fluorescent staining.

Main Results:

• PCL-M:PGS-M blends exhibited uniform mixing and predictable mechanical properties.
• PolyHIPEs demonstrated stable, highly interconnected porosity with tunable pore sizes (10-69 μm).
• Blend-based scaffolds were cell-compatible, promoted extracellular matrix adhesion, and did not require surface treatment for cell adhesion.

Conclusions:

• Blending PCL-M and PGS-M creates versatile porous materials for tissue engineering.
• The composite scaffolds offer tunable properties and improved cell interaction compared to individual polymers.
• This approach provides a promising strategy for developing advanced tissue engineering scaffolds.