Interpenetrated polymer network with modified chitosan in composition and self-healing properties

Area of Science:

• Materials Science
• Biomedical Engineering
• Polymer Chemistry

Background:

• Developing advanced hydrogels with self-healing and environmental responsiveness is crucial for biomedical applications.
• Chitosan-based materials offer biocompatibility, but often require modification for enhanced functionality.
• Poly(2-dimethylaminoethyl methacrylate) (PDMAEMA) provides tunable properties and responsiveness.

Purpose of the Study:

• To synthesize and characterize novel smart hydrogels by interpenetrating crosslinked PDMAEMA with maleoyl-chitosan.
• To investigate the influence of the polysaccharide-to-homopolymer ratio on hydrogel morphology, swelling, and drug release.
• To evaluate the self-healing, responsiveness, and biocompatibility of the synthesized hydrogels for potential bio-applications.

Main Methods:

• Interpenetrating network (IPN) hydrogel synthesis using maleoyl-chitosan and crosslinked PDMAEMA.
• Scanning electron microscopy (SEM) for morphological analysis.
• Swelling measurements in simulated body fluids.
• In vitro drug release studies (procaine).
• Cytotoxicity assays on fibroblasts.

Main Results:

• Successful synthesis of interpenetrating hydrogels with tunable morphology and water uptake based on component ratio.
• Demonstrated self-healing capacity, dual pH/thermo-responsiveness, and controlled drug release (Fickian diffusion).
• Increased maleoyl-chitosan content enhanced fibroblast viability, indicating good biocompatibility.

Conclusions:

• The synthesized smart hydrogels exhibit promising self-healing, dual responsiveness, and biocompatibility.
• These materials are viable candidates for advanced drug delivery systems and other biomedical applications.
• The tunable nature of these hydrogels allows for optimization based on specific bio-application requirements.