Speaker
Description
There is a growing demand for cultural heritage conservation systems that also meet ambitious environmental sustainability targets. In this context, the evolution of the controlled release of anticorrosive agents for metal substrates from mesoporous silica nanoparticles (MSN) have been recently explored1. The main advantage of this approach from the environment point of view consists of the reduction of maintenance and the use of eco-friendly materials. In this work, MSN were obtained by a high-throughput synthesis, were loaded with benzotriazole/silver complex2 or grafted with benzoyl chloride3 to obtain pH-responsive nanocarriers able to release on-demand anticorrosion agents, and were embedded in acrylic coatings. This approach permitted to tailor the release of active agents and to maximize the protective effect on metals and concrete structures. Thus a passive barrier layer was designed, associated to an active protection mechanism induced by the pH-dependent release of corrosion inhibitors. Further research activities are currently focused on the development of bio-based anticorrosive agents, such as L-arginine, and protective polymers, such as bio-acrylates, with the aim to improve the sustainability of materials used for the protection of cultural heritage.
Acknowledgments. This work was supported “Green Endeavor in Art Restoration – GREENART - Grant Agreement n. 101060941” CUP: CUP B63C22001410006
References
Olivieri, F. et al. Nanoscale, 13(20), 9091-9111.
Olivieri, F. et al. ACS Applied Materials & Interfaces, 13(40), 48141-48152.
Olivieri, F. et al. ACS Applied Polymer Materials, 5(8), 5917-5925.
Keywords: nanocarriers, mesoporous silica nanoparticles, corrosion protection, smart materials, functional coatings
| Scientific Sections | Green Engineering |
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