Different Molecular Interaction between Collagen and α- or β-Chitin in Mechanically Improved Electrospun Composite

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Materials Engineering

Background:

• Collagens are crucial for regenerative medicine but lack sufficient mechanical strength in scaffolds.
• Enhancing mechanical properties of collagen-based biomaterials is a key challenge.

Purpose of the Study:

• To develop electrospun collagen-chitin composites with improved mechanical strength.
• To investigate the molecular interactions responsible for mechanical enhancement using 2D correlation spectroscopy (2DCOS).

Main Methods:

• Preparation of electrospun collagen composites with α- and β-chitin polymorphs.
• Characterization of composite phases and mechanical properties (tensile strength).
• Investigation of molecular interactions using two-dimensional correlation spectroscopy (2DCOS).

Main Results:

• Beta-chitin composites exhibited significantly higher tensile strength (~41% over collagen, ~14% over α-chitin composites).
• Collagen/β-chitin composite formed a more homogeneous phase compared to collagen/α-chitin.
• Favorable intermolecular hydrogen bonds between β-chitin and collagen were identified as the cause of enhanced strength.

Conclusions:

• Electrospun collagen/β-chitin composites offer superior mechanical properties for biomedical applications.
• The formation of intermolecular hydrogen bonds is critical for enhancing the mechanical integrity of collagen-based scaffolds.
• Understanding chitin polymorphs' interactions with collagen provides insights for designing advanced biomaterials.