Modelling methacrylated chitosan hydrogel properties through an experimental design approach: from composition to...

Area of Science:

• Biomaterials Science
• Polymer Chemistry
• Tissue Engineering

Background:

• Biopolymeric hydrogels are preferred over synthetic ones in tissue engineering but lack standardization due to material variability and reversible crosslinking.
• Developing standardized, tunable biopolymeric hydrogels is crucial for reliable tissue engineering applications.

Purpose of the Study:

• To synthesize a photocrosslinkable chitosan derivative (CsMA) for creating standardized hydrogels.
• To systematically investigate the relationship between CsMA hydrogel preparation parameters and material properties.
• To develop empirical models for predicting and controlling hydrogel properties for specific applications.

Main Methods:

• Synthesis of methacrylated chitosan (CsMA).
• Rheological characterization of CsMA solutions (viscosity vs. concentration, temperature, shear rate).
• Characterization of CsMA hydrogels (compression modulus, morphology, degradation, solubilization) using response surface methodology.
• UV-initiated radical polymerization for hydrogel formation.

Main Results:

• CsMA solutions exhibit shear-thinning behavior, suitable for 3D printing.
• CsMA hydrogels demonstrate tunable stiffness (12-64 kPa) and long-term stability (up to 60 days).
• Empirical models were established to predict and control hydrogel properties based on preparation parameters.

Conclusions:

• Methacrylated chitosan (CsMA) provides a standardized, photocrosslinkable platform for tunable hydrogel development.
• The developed empirical models enable precise control over hydrogel mechanical properties for tissue engineering.
• CsMA hydrogels show significant potential for various tissue engineering applications due to their tunable and stable characteristics.