Titanium dioxide (TiO₂) Nanocoatings In Food Contact Materials

Titanium dioxide (TiO₂) nanocoatings have garnered interest for their antimicrobial properties, UV protection, and potential for use in food applications. However, the approval of specific TiO₂ nanocoatings for food use can vary by region and regulatory body. Here’s an overview of some TiO₂ nanocoatings that are approved or commonly used in food applications, along with information on their manufacturers:

Approved Titanium Dioxide Nanocoatings for Food Use

1. E171 (Titanium Dioxide)
   • Usage: E171 is a commonly used food additive that includes TiO₂ and is used as a colorant and opacity agent in various food products.
   • Regulatory Status: In the European Union, as of 2021, E171 is no longer considered safe for use in food due to concerns about its safety in nanoparticle form. The situation may vary in other regions (e.g., the US).
2. Antimicrobial TiO₂ Coatings
   • Applications: Some TiO₂ coatings have been developed with antimicrobial properties and are used for food packaging, surfaces, and equipment to enhance food safety.
   • Regulatory Approval: Specific formulations must meet local food safety regulations. Products using TiO₂ coatings often undergo evaluations for safety before they can be marketed for food applications.

Manufacturers of TiO₂ Nanocoatings for Food Applications

1. Kraton Corporation
   • Products: They offer coatings that incorporate TiO₂ for food packaging and surface applications.
   • Website: Kraton
2. P2i
   • Products: Specializes in nanocoating technologies, including TiO₂-based coatings for various applications, including food safety.
   • Website: P2i
3. Nanogate AG
   • Products: They produce various nanotechnology-based coatings, including TiO₂ coatings for food-related surfaces and packaging.
   • Website: Nanogate
4. STG (Sustainable Technologies Group)
   • Products: Develops various coatings for food contact surfaces, including those with antimicrobial properties.
   • Website: Sustainable Technologies Group
5. Innovative Chemical Technologies, Inc. (ICT)
   • Products: Develops antimicrobial and protective coatings, including those containing TiO₂.
   • Website: ICT

Clear and Transparent TiO₂ Coatings for Optical Sensors

• Optical Coatings: Some TiO₂ nanocoatings are designed to be clear and transparent, making them suitable for optical applications such as sensors. These coatings can provide protective and functional properties without compromising optical clarity.
• Applications in Sensors: TiO₂ coatings can enhance the durability and antimicrobial properties of optical sensors, especially in environments where cleanliness is paramount, such as food processing.
• Examples of Clear Coatings:
  • NanoClear: Some products are marketed as clear, hydrophobic TiO₂ coatings that provide scratch resistance and self-cleaning properties. These are often used in optical applications, including sensors.
  • Commercial Examples: Manufacturers like P2i and Nanogate may offer products specifically formulated to maintain optical clarity while providing protective properties.

While there are titanium dioxide nanocoatings available for food use, their approval can vary by region and application. When considering TiO₂ coatings for optical sensors, ensure that the specific product is explicitly designed for such applications and is compliant with food safety regulations. Always consult with manufacturers for detailed specifications, safety data, and regulatory status for their products.