The LIGNICOAT project team is pleased to announce the publication of a new open-access article titled “Antimicrobial Activity of Lignin-Based Alkyd Coatings Containing Soft Hop Resins and Thymol” in the journal Coatings (Impact Factor: 2.9).
This study, led by researchers from TECNALIA and partners, explores the development of sustainable antimicrobial coatings using lignin-based alkyd resins enriched with natural bioadditives—thymol and soft hop resins. The research addresses the urgent need for eco-friendly alternatives to traditional metal-based antimicrobial coatings, particularly in high-risk environments like healthcare facilities and public spaces.
Key Findings & Industrial Relevance:
- Effective Antimicrobial Performance: The coatings demonstrated significant activity against Escherichia coli, Staphylococcus aureus, and the Influenza A (H3N2) virus, meeting ISO standards (ISO 22196:2007 and ISO 21702:2019).
- Sustainable Materials: Thymol (a by-product of the cosmetic industry) and hop resins (a waste product from beer production) were repurposed as antimicrobial agents, aligning with circular economy principles.
- Enhanced Properties: The lignin-based alkyd coatings exhibited excellent adhesion, durability, and gloss, with potential applications in healthcare, public infrastructure, and beyond.
- Reduced Environmental Impact: The study highlights a viable alternative to conventional coatings reliant on environmentally harmful metals like silver and copper.
This innovative approach not only contributes to reducing pathogen transmission but also supports the transition toward bio-based, sustainable coating technologies. Future research may focus on optimizing formulations for broader antimicrobial efficacy and commercial scalability.
Read the full open-access article here.
