کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1528856 | 995716 | 2013 | 8 صفحه PDF | دانلود رایگان |
• 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.
Journal: Materials Science and Engineering: B - Volume 178, Issue 19, 20 November 2013, Pages 1339–1346