Biofunctional Design and Scalable Preparation of Phytolith-Based Nanocomposites for Biomedical Engineering.

Area of Science:

• Biomaterials Science
• Nanotechnology
• Materials Chemistry

Background:

• Natural inorganic nanomaterials, especially silicon-based minerals, show promise as biofunctional carriers due to their properties.
• Challenges include limited biofunctional integration and scalability for practical applications.

Purpose of the Study:

• To develop a CeO2-ZnO/phytolith nanocomposite with enhanced biofunctions.
• To establish a scalable synthesis route for this nanocomposite.
• To evaluate its hemostatic, antibacterial, and antioxidant capabilities.

Main Methods:

• High-temperature pretreatment and controlled interfacial assembly were used to create the CeO2-ZnO/phytolith nanocomposite.
• The material's hemostatic, antibacterial (against E. coli and S. aureus), and antioxidant (H2O2 scavenging) functions were assessed.
• A scalable synthesis route was developed, achieving pilot-scale production.

Main Results:

• The nanocomposite synergistically integrates hemostatic (phytoliths), antibacterial (ZnO), and antioxidant (CeO2) functions.
• ZnO achieved >99.5% inhibition against E. coli and S. aureus.
• Pilot-scale production yielded ~370 g per batch with reproducible composition and performance.
• The resulting hemostatic gauze showed high fluid absorption (1000%) and effective in vivo hemostasis in a mouse model.

Conclusions:

• This work successfully overcomes challenges in biofunctional integration and scalability of silicon-based minerals.
• The CeO2-ZnO/phytolith nanocomposite offers a promising solution for advanced hemostatic applications.
• An integrated development strategy from material design to biomedical application is presented.