3. Application fields
Medical devices: used for catheters, dressings, etc. to reduce the risk of hospital infection.
Food packaging: preparation of antibacterial coatings to extend the shelf life of food.
Water treatment: as antibacterial filter material, remove bacteria and viruses in water.
Air purification: preparation of antibacterial filter screens to remove microorganisms in the air.

4. Research progress
Antibacterial efficiency: Studies have shown that the antibacterial rate of silver ion-loaded silica gel against Escherichia coli and Staphylococcus aureus can reach more than 99%.
Durability: through surface modification and cross-linking technology, the antibacterial performance can last for months or even years.
Biocompatibility: after optimizing the material formula, the cytotoxicity is significantly reduced, meeting the requirements of biomedical use.

5. Challenges and prospects
Antibacterial agent release control: further research is needed on the release kinetics of antibacterial agents to avoid toxicity caused by excessive release.
Cost and scale: reduce the cost of antibacterial agent loading and realize industrial production.
Multifunctionality: combine antibacterial, self-cleaning, anti-ultraviolet and other functions to expand the scope of application.

6. Conclusion
Silica gel composites can significantly improve their antibacterial properties through surface modification, antibacterial agent loading and doping modification, and have broad application prospects in the fields of medicine, food, and environmental protection. Future research should focus on the in-depth analysis of the antibacterial mechanism, the long-term stability of antibacterial properties, and the development of multifunctional composite materials.

Vinyl silicone oil, plz check MY273