New and artificially aged calf parchments by heat stress were investigated through the application of micro-DSC on samples of finely minced parchment suspensions in buffered environments. Criteria were assessed to define a unique normalized damage index (D.I.) parameter that aims at ranking, in a range from 0 to 1, the heat damage experienced by parchment collagen at a molecular level, and that is suitable for a direct application to historical parchments. The results indicate that such a calorimetric methodology is more sensitive in revealing damages deriving from mild heat stress than the analogous damage index previously proposed by the use of a DSC-TGA approach on parchments as-is. Synthetizing the overall injury extent in a unique numerical parameter represents a useful tool for ranking parchment conditions through simple calorimetric methods to help screening procedures and preservation strategies of such cultural heritage handcrafts.

Thermal analysis on parchments II: Micro-DSC approach to assess and rank heat damages at a molecular level / F. Saitta, M. Signorelli, D. Fessas. - In: THERMOCHIMICA ACTA. - ISSN 0040-6031. - 724:(2023), pp. 179490.1-179490.8. [10.1016/j.tca.2023.179490]

Thermal analysis on parchments II: Micro-DSC approach to assess and rank heat damages at a molecular level

F. Saitta
Primo
;
M. Signorelli
Secondo
;
D. Fessas
Ultimo
2023

Abstract

New and artificially aged calf parchments by heat stress were investigated through the application of micro-DSC on samples of finely minced parchment suspensions in buffered environments. Criteria were assessed to define a unique normalized damage index (D.I.) parameter that aims at ranking, in a range from 0 to 1, the heat damage experienced by parchment collagen at a molecular level, and that is suitable for a direct application to historical parchments. The results indicate that such a calorimetric methodology is more sensitive in revealing damages deriving from mild heat stress than the analogous damage index previously proposed by the use of a DSC-TGA approach on parchments as-is. Synthetizing the overall injury extent in a unique numerical parameter represents a useful tool for ranking parchment conditions through simple calorimetric methods to help screening procedures and preservation strategies of such cultural heritage handcrafts.
Parchment; micro-DSC; Damage Index; Heat injury; Collagen
Settore CHIM/02 - Chimica Fisica
2023
21-mar-2023
https://www.sciencedirect.com/science/article/pii/S004060312300059X?via=ihub#keys0001
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/963259
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