Input of solid‐state 13C NMR to study permeation of wet archaeological bones by dicarboxylic fatty diacid‐based chemicals

Conservation treatment of degraded archaeological osseous materials is still an open challenge, since no specific conservation protocol is currently available for restorers or museum curators. This work aims to test the efficiency of two original consolidant solutions in consolidating archaeological...

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Vydáno v:Magnetic resonance in chemistry Ročník 58; číslo 9; s. 820 - 829
Hlavní autoři: Chaumat, Gilles, Duval, Florent, Blinder, Rémi, Bayle, Pierre‐Alain, Bardet, Michel
Médium: Journal Article
Jazyk:angličtina
Vydáno: Bognor Regis Wiley Subscription Services, Inc 01.09.2020
Témata:
archaeological materials
Archaeology
bone
Bones
disodium sebacate
Esterification
Infrared spectroscopy
NMR
Nuclear magnetic resonance
Optimization
Penetration
solid‐state NMR
succinic diacid
ISSN:0749-1581, 1097-458X
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Shrnutí:Conservation treatment of degraded archaeological osseous materials is still an open challenge, since no specific conservation protocol is currently available for restorers or museum curators. This work aims to test the efficiency of two original consolidant solutions in consolidating archaeological material. Archaeological osseous materials remain rare and sparsely available, it is a real drawback for optimization of conservation treatments, therefore in the present work a set of representative samples was chosen. The consolidants tested were a solution of disodium sebacate and a novel polyalcohol (SG1.2) obtained by esterification of 5 succinic diacids with 6 molecules of glycerol at 150°C. Characterization studies of archaeological bones, combining SEM microscopy, IR spectroscopy and high‐resolution solid‐state 13C NMR investigations, have been carried out to assess the effective permeation of bone by the consolidant solutions and to determine their chemical interactions with the residual components of archaeological bones. Although both water solutions significantly impregnate bone, we show that, the solution with disodium sebacate leads to chemical attack on the mineral component due to preferential precipitation of endogenous calcium by the sebacate ions. Such deleterious behaviour is not observed at all with the SG1,2 chemicals. The added value of the polyalcohol treatment as strengthening agent suitable for archaeological bony materials should be further demonstrated by mechanical and ageing tests. The efficiency of two original resin formulations in consolidating archaeological osseous materials are studied by combining SEM microscopy, IR spectroscopy and high‐resolution solid‐state 13C NMR investigations.
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ISSN:0749-1581
1097-458X
DOI:10.1002/mrc.5015