Study of an eco-friendly path to prepare effective alkoxysilane-based consolidants for stone conservation without organic solvents

IF 3.5 2区综合性期刊 0 ARCHAEOLOGY

Journal of Cultural Heritage Pub Date : 2025-02-24 DOI:10.1016/j.culher.2025.02.010

M. Rucha , B. Sena da Fonseca , A.P. Ferreira Pinto , S. Piçarra , M.F. Montemor

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引用次数: 0

Abstract

Finding a balance between technical performance and eco-friendliness in consolidants for stone conservation has proven to be challenging. This work explores the development of eco-friendly, organic solvent-free alkoxysilane consolidants for stone conservation. To eliminate the use of organic solvents, acid-catalysed pathways were investigated and compared with base-catalysed ones. Reaction parameters such as catalyst concentration, water content, and sonication time were varied to determine the optimal composition of the product mixtures.

Ultimately, mixtures with adequate penetration capability for porous stones, enabling effective in-depth consolidation, were successfully prepared. Additionally, these mixtures exhibited a reduced tendency for surface accumulation, minimizing potential adverse effects.

Among the concentrations investigated, the acid-catalysed mixtures demonstrated favorable gelling times and more suitable morphological and structural characteristics compared to those prepared under basic conditions. These improvements were attributed to the more thorough hydrolysis and condensation reactions achieved in acidic media.

The results confirmed that the addition of organic solvents is unnecessary, paving the way for a new generation of organic solvent-free alkoxysilanes for conservation purposes.

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来源期刊

Journal of Cultural Heritage 综合性期刊-材料科学：综合

CiteScore

6.80

自引率

9.70%

发文量

166

审稿时长

52 days

期刊介绍： The Journal of Cultural Heritage publishes original papers which comprise previously unpublished data and present innovative methods concerning all aspects of science and technology of cultural heritage as well as interpretation and theoretical issues related to preservation.