Chitin Nanofibrils Enabled Core-Shell Microcapsules of Alginate Hydrogel

Area of Science:

• Biomaterials Engineering
• Tissue Engineering
• Cell Encapsulation Technology

Background:

• Biopolymeric hydrogels can mimic native cell environments, promoting cell infiltration and growth.
• Core-shell microcapsules offer potential for cell encapsulation, supporting cell growth and metabolite transport.

Purpose of the Study:

• To develop and optimize core-shell microcapsules for cell encapsulation using a co-axial electrostatic method.
• To evaluate the physicochemical properties and in vitro cellular responses of these novel microcapsules.

Main Methods:

• Co-axial electrostatic encapsulation strategy to create chitin nanofibril-integrated alginate hydrogel microcapsules.
• Optimization of hydrogel composition, flow rate, and voltage during encapsulation.
• Physicochemical characterization using scanning electron microscopy (SEM), FTIR, and mechanical testing.
• In vitro cell studies with NIH/3T3 fibroblast cells to assess cellular responses.

Main Results:

• Successfully fabricated core-shell microcapsules with optimized parameters.
• Characterization confirmed the structure, size, and stability of the microcapsules.
• NIH/3T3 fibroblast cells encapsulated within the microcapsules exhibited excellent viability for over two weeks.

Conclusions:

• The developed core-shell microcapsules provide a promising 3D hydrogel network for biomedical applications.
• Potential applications include in vitro tissue models for toxicity studies, wound healing, and tissue repair.