Aqueous polyacrylate latex nanodispersions used as consolidation agents to improve mechanical properties of Prague sandstone

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378297%3A_____%2F23%3A00573439" target="_blank" >RIV/68378297:_____/23:00573439 - isvavai.cz</a>

Alternative codes found

RIV/00216275:25310/23:39920619

Result on the web

<a href="https://doi.org/10.1016/j.culher.2023.06.021" target="_blank" >https://doi.org/10.1016/j.culher.2023.06.021</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.culher.2023.06.021" target="_blank" >10.1016/j.culher.2023.06.021</a>

Result language

angličtina

Original language name

Aqueous polyacrylate latex nanodispersions used as consolidation agents to improve mechanical properties of Prague sandstone

Original language description

This investigation aims at assessing the potential of polyacrylate latex nanodispersions as consolida- tion agents for sandstones. Four different latex types, implementing polymer fluorination and chemical crosslinking, have been synthesized at the scope and fully characterized. The Prague sandstone employed in this study has been selected as an example of highly porous stones used as building materials for many historical monuments. Two different concentration levels of nanodispersions have been adopted. The con- solidated stone samples have been tested using a combination of physical-mechanical tests and micro- scopic observations. Compared to the non-treated samples, significant increments of mechanical proper- ties ( e.g. up to 3.3 times higher bending strength) have been detected after the consolidation treatment with concentrated products. Moreover, when 10 times diluted latex nanodispersions have been applied, the improvement of mechanical properties has still been significant, while moisture transport properties, such as water absorption, have been found to be comparable with those of the untreated sample. Fluo- rinated polymers imparted better hydrophobic properties with a contact angle above 100 °. Observations using a scanning electron microscope revealed the good filling and bridging capacity of the applied con- solidation agents. As demonstrated, by acting on the polymer structure, that is, by tuning the degree of crosslinking, polymer fluorination and gel content, the properties of these novel polyacrylate latex nan- odispersions can be tailored to the specific stone and type of decay in order to improve the effectiveness of the treatments and obtain the desired final properties. The flexibility of their chemistry offers new opportunities for preserving objects of cultural heritage that are also at risk due to the ongoing climate change.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20501 - Materials engineering

Project

—

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

Name of the periodical

Journal of Cultural Heritage

ISSN

1296-2074

e-ISSN

1778-3674

Volume of the periodical

62

Issue of the periodical within the volume

July-August

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

10

Pages from-to

412-421

UT code for WoS article

001040776600001

EID of the result in the Scopus database

2-s2.0-85165281306