Study on the biodeterioration of alkyd ah resin used as a binding medium for modern paintings by pyrolysis-gas chromatography-mass spectrometry and ftir spectroscopy
- María Teresa Doménech-Carbó 1
- Giovana Bitossi 1
- Juana de la Cruz-Cañizares 1
- Fernando Bolívar-Galiano 2
- Maria del Mar López-Miras 2
- Julio Romero-Noguera 2
- Inés Martín-Sánchez 2
- José Vicente Gimeno-Adelantado 3
- Antonio Doménech-Carbó 3
- 1 Universitat Politècnica de València, España
- 2 Universidad de Granada, España
- 3 Universitat de València, España
ISSN: 2445-1150, 1887-3960
Year of publication: 2008
Issue: 3
Pages: 191-196
Type: Article
More publications in: Arché
Abstract
Evaluation of the alteration produced by microbiological attack on alkyd resins has been carried out by FTIR spectroscopy and Pyrolysis-Gas Chromatography/Mass Spectrometry (Py-GC/MS). The latter included the online derivatisation of alkyd resins using hexamethyldisilazane during pyrolysis. Specimens consisting of thin films of resins formed on glass slides were used. Analyses performed on the specimens in which different genera of bacteria and fungi were inoculated and allowed to grow, indicate that the attack of microorganisms encourages the scissioning of the polymeric resins and the appearance of short-chain fatty acids. IR bands ascribed to carboxylic acids appearing in samples from inoculated specimens, as well as an increase in the content of short-chain fatty acids detected by Py-GC/MS from specimens inoculated with fungi, confirm these results and suggest that the effects of metabolic processes in these microorganisms are more significant than those of bacteria.