Studies on the effect of dry-heat ageing on parchment deterioration by vibrational spectroscopy and micro hot table method

Cappa, Federica; Paganoni, Ilaria; Carsote, Cristina; Schreiner, Manfred; Badea, Elena

doi:10.1016/j.polymdegradstab.2020.109375

Cited by 23 publications

(19 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…From 500 up to 1050 nm, the samples show negligible values of absorbance. The spectral features observed in these ranges have been identified as due to the π→π* and n→π* electronic transition of C=O, NH and CONH groups in collagen molecules [49,56].…”

Section: Uv-vis-nir Reflectance Spectroscopymentioning

confidence: 99%

“…The presence of the last compound is attributable to radical reactions involving chlorine probably derived from calcination baths and/or bleaching, treatments performed during the parchment manufacturing process [54]. The intensities of these last bands due to oxidation are not X-ray irradiation dose dependent, as expected by the inner complexity of the oxidation processes involving also radical ions [55]. In accordance with LTA results presented below, FTIR spectra show independent trends for the two processes (oxidation and hydrolysis due to artificial aging) just described.…”

Section: Ftirmentioning

confidence: 99%

See 1 more Smart Citation

Effect of X-ray and artificial aging on parchment

et al. 2021

View full text Add to dashboard Cite

In this study, the employment of the X-ray irradiation as bioremediation method to treat parchment has been deeply investigated. In particular, the effect of the irradiation doses on the structural stability of collagen, the main constituent of parchment, has been evaluated on a series of modern parchment samples by means of different opto-thermal and spectroscopic techniques in order to obtain the dose-dependent effect of irradiation on collagen. Moreover, the long-term behavior of the irradiated parchment has been considered by analyzing the same series of samples after being hygrothermally artificially aged. Characterizations by light transmission analysis, Fourier transform infrared spectroscopy and the ultraviolet–visible–near infrared (UV–Vis–NIR) reflectance one have been performed for the identification of the radio-induced effect on the parchment structure even in a dose range much wider than the need for sterilization. The obtained results have proved the safeness of the method in the short and long term confirming the applicability of this emerging procedure.

show abstract

Section: Uv-vis-nir Reflectance Spectroscopymentioning

confidence: 99%

Section: Ftirmentioning

confidence: 99%

Effect of X-ray and artificial aging on parchment

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Six diferent replicates of each sample were measured and averaged before data preprocessing. Opus 7.0 software (Bruker Optics, Germany) was used for the acquisition and elaboration of the spectra, while their graphic presentation was done with Origin 7.5 software [39][40][41].…”

Section: Fourier Transform Infrared Spectroscopy In Attenuated Total Re Ection Mode (Ftir-atr)mentioning

confidence: 99%

“…They assigned the component near 1630 cm − 1 mainly to the carbonyl stretching of hydroxyproline and of the others amino acids involved in water mediated hydrogen bonds in the native state [52]. Recently, some of us reported an number of these carbonyl moieties in denatured α-chains for collagen (in parchment) exposed to dry-heat ageing, causing the component at 1632 cm − 1 to increase in intensity [40].…”

Section: Effects Of Leather Burial On Molecular Alteration Of Collagen-tannin Matrix By Ftir-atrmentioning

confidence: 99%

Burial-Induced Deterioration in Leather – A FTIR-ATR, DSC, TG/DTG, MHT and SEM study

Vyskočilová

Ševčík

Carsote

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

In this study we used an analytical approach based on complementary techniques that targets all structural levels of collagen to investigate the effects of burrial tests on vegetable-tanned lather. For the first time, a group of deterioration markers specific to molecular, fibrillar and and fibrous structure of collagen in leather was associated with the anaerobic condition of burried leather. Gelatin was identified both through the FTIR-ATR spectral markers (molecular alteration of collageneous triple helix structure) and SEM imaging (alteration of fibrils and fibres morphology). Loosening of collagen-tannin interaction and de-tanning were detected by the application of second derivative spectral analysis. Collagen denaturing profile was evidenced by DSC analysis and documented by SEM observations at high magnification, while TG/DTG analysis gave information on the leather thermo-oxidative deterioration. Our results confirmed that the shrinkage temperature measured by MHT method could be misleading. However, this method proved its usefulness in assessing the structural inhomogeneity of collagen in buried leather and identifying gelatin. The complementary FTIR-ATR, DSC, TG/DTG, MHT and SEM analytical protocol proved its high effectiveness and could thus be extended to the challenging study of archaeological leather.

show abstract

“…2,3 Besides the chemical attack, one should also consider the growth of biological species on the surface. 4 All these factors are enhanced if water is retained by the surface due to spreading/adsorption phenomena, which are typically present as a consequence of the hydrophilic nature of the natural stones and their porosity. The latter is actually a fundamental feature to ensure the stones breathability that is important to keep the material dry and, therefore, it should be kept even after a surface cover layer is applied for protection purposes.…”

Section: Introductionmentioning

confidence: 99%

Halloysite nanotubes-based nanocomposites for the hydrophobization of hydraulic mortar

et al. 2021

View full text Add to dashboard Cite

The treatment of stone surfaces for their protection from ageing caused by natural and anthropogenic effects is an open issue in materials development for Cultural Heritage. We thought interesting to verify the suitability of a modified cellulose biofilm filled with halloysite nanotubes as wax compatibilizers to design a protecting layer. A hydraulic mortar was selected as a stone prototype. To improve the physico-chemical properties of the covering layer, wax microparticles have been incorporated to control transport, consolidation and wettability features. In particular, different application protocols have been studied, namely brushing and spraying, to assess whether the proposed procedures can be scaled up. Colorimetric analysis has been carried out to evidence the applicability in terms of color alteration after the treatment. Water adhesion was investigated by measuring the contact angle values as a function of time to obtain information on spreading and adsorption phenomena. These physico-chemical properties have been correlated to the microstructure evidenced by both electron and optical microscopies. Graphic abstract

show abstract

Studies on the effect of dry-heat ageing on parchment deterioration by vibrational spectroscopy and micro hot table method

Cited by 23 publications

References 40 publications

Effect of X-ray and artificial aging on parchment

Effect of X-ray and artificial aging on parchment

Burial-Induced Deterioration in Leather – A FTIR-ATR, DSC, TG/DTG, MHT and SEM study

Halloysite nanotubes-based nanocomposites for the hydrophobization of hydraulic mortar

Contact Info

Product

Resources

About