Photocurable and 3D Printable Functional Polyesters to Engineer Elastomeric Scaffolds for Biomedical Applications.

Area of Science:

• Polymer Chemistry
• Biomaterials Science
• Tissue Engineering

Background:

• Elastomeric scaffolds are crucial for biomedical applications, requiring precise control over mechanical properties and degradation.
• Existing materials often lack the ability to simultaneously tune multiple properties effectively.
• Functional block copolyesters offer a promising route to engineer advanced scaffold materials.

Purpose of the Study:

• To develop photocurable functional block copolyesters for creating advanced elastomeric scaffolds.
• To investigate the role of dual crosslinking (chemical and crystal-domain) in tuning material properties.
• To assess the printability and cytocompatibility of the developed elastomers for biomedical applications.

Main Methods:

• Synthesis of functional block copolyesters with soft and stiff segments.
• Crosslinking via thiol-yne click chemistry under UV light with a photo-initiator.
• Characterization of mechanical properties, degradation rates, and scaffold architecture using digital light processing (DLP).
• In vitro cell culture studies using human umbilical vein endothelial cells (HUVECs).

Main Results:

• The functional prepolymer was successfully crosslinked into a robust elastomer using UV light and thiol-yne chemistry.
• Dual crosslinking significantly enhanced the tunability of mechanical properties and degradation rates compared to chemical crosslinking alone.
• The material demonstrated excellent photo-printability via DLP, enabling precise control over scaffold pore sizes.
• Hydroxyl groups on the polymer backbone promoted favorable endothelial cell adhesion and growth.

Conclusions:

• Photocurable functional block copolyesters provide a versatile platform for engineering advanced elastomeric scaffolds.
• Dual crosslinking offers superior control over material properties for tailored biomedical applications.
• The photo-printable nature and cell-friendly surface make these materials highly suitable for constructing complex medical devices.
• These functional photo-polyesters hold significant potential for future bioengineering research and medical device development.