期刊
JOURNAL OF CULTURAL HERITAGE
卷 15, 期 2, 页码 151-158出版社
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.culher.2013.03.002
关键词
Nanoscience; Nanotechnologies; Wall paintings conservation; Nanolime; Consolidation; Porous materials
类别
资金
- Consorzio Interuniversitario per lo sviluppo dei Sistemi a Grande Interfase (CSGI)
- Ministero dell'Universita e della Ricerca Scientifica (Fondi Prin)
- University of Florence (Fondi d'Ateneo ex-60%)
- Tuscany Region POR-FESR TeCon@BC
- PAR-FAS SICAMOR Projects
Nanolime dispersed in 2-propanol was extensively used for the consolidation of wall paintings. The knowledge of the advances of this methodology dealing with all the possible effects associated with the nanolime new material in conservation is fundamental to assess and improve the technique. In this paper, four different dispersions of Ca(OH)(2) nanoparticles were characterised by Small Angle X-rays Scattering technique (SAXS) and Transmission Electron Microscopy (TEM) in order to achieve information on size, shape, polydispersity, agglomeration, and crystal structure (by SAED patterns) of the particles. Once characterised, the dispersions were tested in two different case studies, the Carceri dello Steri in Palermo with their graffiti and the 18th century lunettes at the SS. Giuda e Simone Cloister, Corniola (Empoli) with their lime-based mural paintings. The treated samples were characterised in relationship to either their morphology and surface chemical composition by Scanning Electron Microscopy coupled with Energy Dispersive X-rays spectroscopy (SEM-EDX), or their water absorption and mechanical properties (resistance to material abrasion). The results obtained showed that all the dispersions were nanometrically structured and their application succeeded in recovering the mechanical properties of the painting or graffito layers, not altering their permeability to water and keeping perfectly the wall transpiration. However, the dispersions constituted of the nanoparticles obtained via a synthesis able to control size and shape of the Ca(OH)(2) particles resulted in a better performance in situ, even if the differences found by SAXS and TEM were slight. (C) 2013 Elsevier Masson SAS. All rights reserved.
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