Reloadable broad-spectrum antimicrobial paint
A novel, reloadable waterborne antimicrobial paint that provides long-lasting, broad-spectrum protection against bacteria and viruses. Designed for high-touch, healthcare, and food-production environments, this innovative coating remains effective through 90 wash cycles and features a simple, spray-on maintenance protocol to restore antimicrobial performance once it declines.
Overview
This technology provides a sustainable and repairable approach to antimicrobial surface protection. Researchers have developed a waterborne latex paint that incorporates quaternary ammonium compounds (QACs) at the particle surface through supramolecular electrostatic interactions. Unlike conventional antimicrobial coatings that lose effectiveness over time, this formulation allows for a measurable maintenance protocol where antimicrobial activity can be easily restored once it declines. This solution is particularly suited for high-touch environments, healthcare facilities, and food-production settings where consistent, long-term pathogen control is critical.
Technical specifications
- Broad-spectrum antimicrobial efficacy: Demonstrated effectiveness against four types of bacteria and four types of viruses, including SARS-CoV-2.
- High durability: The coating maintains efficacy for at least 90 wash cycles, simulating three months of daily cleaning.
- Reloadable mechanism: When performance decreases, antimicrobial activity can be fully restored by spraying a dilute aqueous solution of the quaternary ammonium compound (e.g., cetyltrimethylammonium) onto the surface.
- Material compatibility: The paint can be applied to diverse surfaces, including polymers, glass, and metals.
- Sustainable design: Uses Generally Regarded As Safe (GRAS) molecules commonly found in consumer care products, facilitating a practical and scalable maintenance workflow.
Technology readiness level
The technology has reached a level of laboratory validation and prototype demonstration, characterized by successful formulation, multi-wash performance testing, and verified broad-spectrum antimicrobial activity against both bacteria and viruses. It is currently at TRL 4-5.
About Politecnico di Torino
Politecnico di Torino is a major public, STEM-focused polytechnic university in Italy known for applied research and deep industry partnership. Companies engage on campus through co-located labs, shared facilities, and corporate-access research space, with options from sponsored projects to multi-year agreements. Being in Turin embeds the university in a dense mobility and manufacturing ecosystem, enabling rapid prototyping, pilot testing, and links to OEM supply chains. Research is supported by competitive European Commission programs alongside national and regional funding, often in collaboration with industry. A dedicated technology transfer office and an on-campus startup incubator streamline IP, licensing, and spinout creation.
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