| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1528856 | Materials Science and Engineering: B | 2013 | 8 Pages |
•Synthesis of nanocomposites with noble metals having high antibacterial efficiency.•Silver nanoparticles antibacterial activity for monumental stone conservation.•A high antibacterial activity while assuring good stone protection.
The present paper reports on the evaluation of two silsesquioxane-based hybrid nanocomposites with methacrylate units containing titania and/or silver nanoparticles aimed as antibacterial coatings for monumental stones. Sol–gel reaction of titanium isopropoxide and/or 3-(trimethoxysilyl)propyl methacrylate, in the presence of silver nitrate and a primary amine surfactant, yielded new types of hybrid nanocomposites with high antibacterial/antifungal efficacy. Different polymer behaviours regarding a frequently used monumental stone originating from Romania were evidenced through Fourier-transform infrared (FTIR) spectroscopy and powder X-ray diffraction (PXRD) technique. Conclusions regarding the stones acid-resistant character and lower influence of salt weathering on its durability, as well as a better protective coating containing titania units were revealed.
