1. 🧬 Biomedicine
• Tissue engineering scaffolds: Used for repairing bones, cartilage, skin, etc.
• Wound dressings: Made into sponges, films, and hydrogels for hemostasis, antibacterial purposes, and promoting healing.
• Medical materials: Used for surgical sutures, artificial skin, etc. Biocompatible, biodegradable, hemostatic, antibacterial, and promotes cell growth.

2. 💊 Pharmaceuticals and Drug Delivery
• Drug carriers: Encapsulate small molecule drugs, proteins, and nucleic acids (DNA/RNA) for controlled release.
• Pharmaceutical excipients: Used as disintegrants, thickeners, etc.

3. 🌾 Agriculture and Food
• Agricultural applications: Seed coating, soil improvement, fruit preservation, feed additives.
• Food industry: Health foods (chitosan oligosaccharides), natural preservatives, food packaging films.
• Plant protection: Stimulates plant disease resistance and controls nematodes.
Antibacterial, antifungal, film-forming, and induces plant self-defense.

4. ⚗️ Daily Chemicals and Light Industry
• Cosmetics: Used for moisturizing, film formation, and antibacterial purposes.
• Textiles: Used for fabric finishing and manufacturing health underwear.
• Papermaking: Used as an additive to enhance paper performance. Film-forming, hydrophilic, and antibacterial.

5. 🌍 Environmental Protection and Water Treatment
• Water treatment: Used as a natural flocculant and adsorbent for wastewater treatment, protein recovery, and heavy metal ion adsorption.
• Functional materials: Preparation of adsorbents, membrane materials, etc.