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Cohesion Gain Induced by Nanosilica Consolidants for Monumental Stone Restoration

Dziadkowiec, Joanna ; Cheng, Hsiu-Wei ; Ludwig, Michael ; Ban, Matea ; Tausendpfund, Timon Pascal ; von Klitzing, Regine ; Mezger, Markus ; Valtiner, Markus (2024)
Cohesion Gain Induced by Nanosilica Consolidants for Monumental Stone Restoration.
In: Langmuir, 2022, 38 (22)
doi: 10.26083/tuprints-00026634
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Item Type: Article
Type of entry: Secondary publication
Title: Cohesion Gain Induced by Nanosilica Consolidants for Monumental Stone Restoration
Language: English
Date: 10 September 2024
Place of Publication: Darmstadt
Year of primary publication: 2022
Place of primary publication: Washington, DC
Publisher: American Chemical Society
Journal or Publication Title: Langmuir
Volume of the journal: 38
Issue Number: 22
Collation: 10 Seiten
DOI: 10.26083/tuprints-00026634
Corresponding Links:
Origin: Secondary publication service
Abstract:

Mineral nanoparticle suspensions with consolidating properties have been successfully applied in the restoration of weathered architectural surfaces. However, the design of these consolidants is usually stone-specific and based on trial and error, which prevents their robust operation for a wide range of highly heterogeneous monumental stone materials. In this work, we develop a facile and versatile method to systematically study the consolidating mechanisms in action using a surface forces apparatus (SFA) with real-time force sensing and an X-ray surface forces apparatus (X-SFA). We directly assess the mechanical tensile strength of nanosilica-treated single mineral contacts and show a sharp increase in their cohesion. The smallest used nanoparticles provide an order of magnitude stronger contacts. We further resolve the microstructures and forces acting during evaporation-driven, capillary-force-induced nanoparticle aggregation processes, highlighting the importance of the interactions between the nanoparticles and the confining mineral walls. Our novel SFA-based approach offers insight into nano- and microscale mechanisms of consolidating silica treatments, and it can aid the design of nanomaterials used in stone consolidation.

Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-266345
Classification DDC: 500 Science and mathematics > 530 Physics
500 Science and mathematics > 540 Chemistry
600 Technology, medicine, applied sciences > 670 Manufacturing
Divisions: 05 Department of Physics > Institute for Condensed Matter Physics > Soft Matter at Interfaces (SMI)
Date Deposited: 10 Sep 2024 07:33
Last Modified: 10 Sep 2024 07:33
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/26634
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