期刊
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
卷 122, 期 1, 页码 315-322出版社
SPRINGER
DOI: 10.1007/s10973-015-4759-x
关键词
Rabbit skin glue; Azurite; Calcium carbonate; Hematite and red lead; Thermogravimetric analysis; Differential scanning calorimetry
资金
- Italian Ministry of University and Research [2008XXAMZT, 2010329WPF]
The thermal degradation of rabbit skin glue, a collagen-based proteinaceous material used as a paint binder in paintings, was investigated in this paper. Paint reconstructions of the glue on its own or mixed with azurite (Cu-3(CO3)(2)(OH)(2)), calcium carbonate (CaCO3), hematite (Fe2O3 center dot nH(2)O) and red lead (Pb3O4) were analysed using a thermoanalytical approach. This method enabled us to investigate the interactions between the glue and pigments before and after artificial indoor light ageing. The study was carried out using differential scanning calorimetry, thermogravimetry and thermogravimetry/FTIR analysis already successfully employed to characterize the paint binders. The results highlighted that all the inorganic pigments interact with rabbit skin glue, thus decreasing the thermal stability of the binder. Light ageing further decreased the thermal stability of pigmented paint replicas, suggesting a moderate increase in the rate of the degradation.
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