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Durable MOF-based antimicrobial sealant combats microbial contamination in buildings
Researchers have developed an innovative elastomeric sealant featuring ZIF-8 composites that deliver long-term antimicrobial protection. The material achieves superior antifungal resistance and outperforms commercial sealants in real-world tests.
Microbial contamination is a common issue with elastomeric sealants in the construction industry, compromising indoor air quality and building integrity, especially in damp environments such as bathrooms. To address the limited long-term efficacy of conventional antimicrobial sealants, researchers have developed a novel material incorporating ZIF-8-based composites into a silicone matrix.
The ZIF-8 composite employs a dual-action antimicrobial mechanism: controlled release of encapsulated propiconazole and in-situ generation of reactive oxygen species (ROS). An optimised dispersion protocol using stearic acid ensures homogeneous mixing with the silicone matrix. The sealant achieved the highest antifungal rating (Grade 0, no fungal growth) under a modified ASTM G21 standard.
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Proven long-term performance in real-world tests
The sealant’s efficacy was validated in a two-month field test conducted in an office building shower room. The material reduced bacterial colony-forming units (CFU) by over 97 % (from 143 CFU to 4 CFU) and completely eliminated fungal growth. Compared to a commercial sealant, the ZIF-8-based material demonstrated superior antimicrobial performance and durability.
This research offers a promising strategy for developing durable antimicrobial building materials that enhance indoor hygiene and prolong building lifespan.
Source: Nam, J., Yeon, K.-M., & Kim, J. (2025). Development of durable MOF-based antimicrobial elastomeric sealant for effective microbial decontamination in building environments. Progress in Organic Coatings, 109768. https://doi.org/10.1016/j.porgcoat.2025.109768
