Effect of ZnO on Properties of Gels for Heritage Objects Conservation
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Institute of Physical Chemistry Ilie Murgulescu of the Romanian Academy—ICF, 202 Splaiul Independenţei, 060021 Bucharest, Romania
2
National Research & Development Institute for Non-Ferrous and Rare Metals—IMNR, 102 Biruinţei Blvd., 077145 Pantelimon, Romania
3
Institute of Biology Bucharest of Romanian Academy—IBB, 296 Splaiul Independenţei, P.O. Box 56–53, 060031 Bucharest, Romania
*
Authors to whom correspondence should be addressed.
Gels 2021, 7(4), 251; https://doi.org/10.3390/gels7040251
Received: 25 October 2021
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Revised: 24 November 2021
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Accepted: 5 December 2021
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Published: 7 December 2021
One of the current research objectives is the development of new films for the conservation of glass heritage objects. The value of historical glass objects is given by the technology and raw materials used in production as well as their transparency and color. Their colors are correlated with oxide composition rich in transitional metals, which decrease resistance of corrosive agents from the atmosphere. In this paper, SiO2-ZnO gels have been designed to protect historical glass objects. The sol–gel method used to obtain gels is a powerful tool for functionalizing different materials. An important functionalization is the antibacterial activity. By applying a gel, the coated material is able to decrease the growth of bacteria. After deposition, some gels must be strengthened by heat treatment. The effect of ZnO content (10 mol% and 20 mol%) on the properties of the studied gels was investigated by Differential scanning calorimetry (DSC), Fourier transform infrared (FTIR), X-ray diffraction (XRD), Scanning electron microscopy (SEM), and antibacterial tests. Escherichia coli ATCC 25922, Staphylococcus aureus ATCC 25923, and the halotolerant bacterium, Virgibacillus halodenitrificans, isolated from a salt crystal from Unirea mine, Slănic Prahova, Romania, were used. The gel Gel 2 (SiO2-ZnO (20 mol%)) showed the best properties.
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Keywords:
SiO2-ZnO gels; historical glasses; sol–gel method; FTIR; antibacterial tests
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MDPI and ACS Style
Mocioiu, O.-C.; Atkinson, I.; Mocioiu, A.-M.; Neagu, S.; Ruginescu, R.; Mitran, R.-A.; Enache, M. Effect of ZnO on Properties of Gels for Heritage Objects Conservation. Gels 2021, 7, 251. https://doi.org/10.3390/gels7040251
AMA Style
Mocioiu O-C, Atkinson I, Mocioiu A-M, Neagu S, Ruginescu R, Mitran R-A, Enache M. Effect of ZnO on Properties of Gels for Heritage Objects Conservation. Gels. 2021; 7(4):251. https://doi.org/10.3390/gels7040251
Chicago/Turabian StyleMocioiu, Oana-Cătălina, Irina Atkinson, Ana-Maria Mocioiu, Simona Neagu, Robert Ruginescu, Raul-Augustin Mitran, and Mădălin Enache. 2021. "Effect of ZnO on Properties of Gels for Heritage Objects Conservation" Gels 7, no. 4: 251. https://doi.org/10.3390/gels7040251
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