Aqueous polyacrylate latex nanodispersions used as consolidation agents to improve mechanical and water transport properties of treated Prague sandstone

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378297%3A_____%2F23%3A00574136" target="_blank" >RIV/68378297:_____/23:00574136 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Aqueous polyacrylate latex nanodispersions used as consolidation agents to improve mechanical and water transport properties of treated Prague sandstone

Original language description

The use of polyacrylate latex nanodispersions as potential consolidation agents for weak stone materials has been investigated. Four different dispersions have been prepared at the scope. The effect of polymer fluorination and chemical crosslinking was tested on the Prague sandstone, an example of natural stone exhibiting high susceptibility to weathering and employed in the past as construction material and to realize monuments. The treatments have been employed using two concentration levels of nanodispersions (around 30 and 3 wt. %) and then tested for physical-mechanical properties and microstructural modifications. Significant improvement in water transport properties and mechanical properties has been obtained as a consequence of the consolidation treatment. Positive effects were observed even with highly diluted nanodispersions. The consolidation agent revealed good filling and bridging capacity within the matrix (Fig. 1). Taking advantage of the possibility of acting on the polymer structure – by tuning crosslinking capability, polymer fluorination and gel content, allowed for optimizing the obtained properties of the consolidated material in the function of the specific characteristics of the stone and the type of decay. Therefore, the flexibility of their chemistry offers new opportunities for the preservation of objects of cultural heritage.

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

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OECD FORD branch

20501 - Materials engineering

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2023

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů