Polymeric materials used in the preservation of historical stone buildings

Terlikowski, W.; Wasilewski, Kacper; Gregoriou-Szczepaniak, Martyna; Kędzierski, Michał; Sobczyńska, Ewa

doi:10.14314/polimery.2020.4.5

Cited by 3 publications

(2 citation statements)

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“…Siloxane coating may play a significant role in heritage conservation, in terms of salt resistance and high hydrophobicity. The biggest shortcoming is that the siloxane forms a silica gel during the drying process, producing strong stress damage to the micropores of the sandstone [22,23]. In addition, siloxane consolidation agents are usually not effective for building materials that are rich in calcium carbonate, because the combination of the consolidation agent and the calcite substrate is only a mechanical action.…”

Section: Introductionmentioning

confidence: 99%

“…However, acrylic resins with low permeability, which tend to form crusts on the rock surface, are often used in combination with different concentrations of nanoparticles to improve the high hydrophobicity and salt resistance of the rock [12,24]. In past decades, the protection of commercial acrylic resins obtained through acrylic and methacrylic monomers has been satisfactory [22,25,26], which makes such acrylic resins very suitable as a reference when testing or researching new products.…”

Section: Introductionmentioning

confidence: 99%

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Application of SiON Coatings in Sandstone Artifacts Conservation

2022

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For a long time, a large number of sandstone cultural relics have been exposed to the outdoors, and they are facing unprecedented threats. Curing perhydropolysilazane at varied pyrolysis times results in a series of SiON solids. Fourier transform infrared absorption spectroscopy (FTIR) results show that the Si−H bond disappears at 2163 cm−1, and that the Si−O peaks at 460 cm−1, becoming stronger during the pyrolysis of Perhydropolysilazane (PHPS) to SiON solids. X-ray photoelectron spectroscopy (XPS) results indicate a decrease in the proportion of N atoms from 22.71% to 3.38% and an increase in the proportion of O atoms from 59.74% to 69.1%, indicating a gradual production of SiO2 from perhydropolysilazane. To protect the sandstone, the SiON protective layer and the commonly used protective materials—acrylic resin and polydimethylsiloxane—are applied. When compared to sandstone treated with acrylic resin B72 and polydimethylsiloxane coatings, SiON-coated sandstone effectively reduces porosity and water absorption. Ageing tests have shown that the SiON-coated sandstone is effective in resisting crystalline damage from sodium sulfate. These thenardites can change shape during formation, allowing their widespread distribution in different locations in the sandstone. The surface thenardite of the SiON-treated samples was smaller than that of the polydimethylsiloxane and acrylic resin B72-treated samples, while the untreated samples were flaky with obvious dehydration characteristics.

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Section: Introductionmentioning

confidence: 99%