Robust chitin films with good biocompatibility and breathable properties

Area of Science:

• Materials Science
• Polymer Chemistry
• Biomaterials Engineering

Background:

• Chitin, a highly abundant natural polysaccharide, offers significant potential for various applications.
• Developing mechanically robust and functional chitin-based materials remains an active area of research.

Purpose of the Study:

• To fabricate mechanically strong and breathable chitin films.
• To investigate the properties and potential applications of chemically crosslinked chitin films.

Main Methods:

• Chitin solutions were prepared in a NaOH/urea aqueous system.
• Chemical crosslinking was achieved using epichlorohydrin (ECH).
• Mechanical properties, non-toxicity, and water vapor transmittance were evaluated.

Main Results:

• Chitin films exhibited significantly enhanced tensile strength (139 MPa) and elongation at break (43%).
• The fabricated chitin films demonstrated non-toxicity through cell assays.
• The films displayed superior breathability compared to commercial products.

Conclusions:

• Chemically crosslinked chitin films possess exceptional mechanical strength, biocompatibility, and breathability.
• These robust chitin films are promising for diverse applications including biomedical uses, food packaging, and wound healing.