Protective behaviour monitoring on wood photo-degradation by spectroscopic techniques coupled with chemometrics

Capobianco, Giuseppe; Calienno, Luca; Pelosi, Claudia; Scacchi, Martina; Bonifazi, Giuseppe; Agresti, Giorgia; Picchio, Rodolfo; Santamaria, Ulderico; Serranti, Silvia; Monaco, Angela Lo

doi:10.1016/j.saa.2016.05.050

Cited by 30 publications

(29 citation statements)

References 41 publications

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“…Additionally, hydrophobic coatings prevent wet conditions, which create a very favorable environment for the growth of various wood degrading biological organisms (e.g., diverse fungi, bacteria, and insects) [9]. Common surface hydrophobization methods include, but are not limited to, treatments based on silicone [11][12][13] and surface impregnation with various waxes, oils, or acrylate coatings [9,[14][15][16][17]. In other studies, wood surfaces were also treated by heat [18] or plasma [19] to improve water resistance.…”

Section: Introductionmentioning

confidence: 99%

Effectiveness of Two Different Hydrophobic Topcoats for Increasing of Durability of Exterior Coating Systems on Oak Wood

Pánek¹,

Dvořák²,

Oberhofnerová³

et al. 2019

Coatings

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A top hydrophobic layer can increase the durability of exterior coatings applied on wood. Two hydrophobic topcoats - synthetics and waterborne acrylate resin with wax additives, were tested as top layers on twenty-four different coating systems applied on oak wood in this experiment. Artificial accelerated weathering lasted for six weeks. Changes of color, gloss, surface wetting were evaluated, and microscopic analyses of coated surfaces were done during weathering. The results have shown that a top hydrophobic layer increases the durability of tested coating systems in most cases. However, the effectiveness of the two tested hydrophobic topcoats turned out to be different depending on the specific coating systems used.

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Section: Introductionmentioning

confidence: 99%

Effectiveness of Two Different Hydrophobic Topcoats for Increasing of Durability of Exterior Coating Systems on Oak Wood

Pánek¹,

Dvořák²,

Oberhofnerová³

et al. 2019

Coatings

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show abstract

“…A pale yellow fluorescence is clearly visible on the flesh areas probably due to the painting binder [43,44]. In some areas of the collar and of the base, a light orange fluorescence is observed which can be associated to a natural resin such as shellac, widely used in surface treatment of wooden sculptures [9,[45][46][47][48][49]. An intense orange fluorescence is concentrated in four points of the front and back sides of the Saint Rodonio bust.…”

Section: Discussionmentioning

confidence: 99%

A New Practical Approach for 3D Documentation in Ultraviolet Fluorescence and Infrared Reflectography of Polychromatic Sculptures as Fundamental Step in Restoration

2019

Self Cite

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The aim of this work is to present a new practical approach to digital photogrammetry to obtain 3D models of polychromatic sculptures under ultraviolet fluorescence and near-infrared by starting from photographic images. This digital photogrammetry was applied recently to a 17th-century reliquary bust representing St. Rodonio, a saint particularly venerated by the Orthodox Church, presently under restoration in the Laboratories of University of Tuscia and belonging to the Museum of Colle del Duomo of Viterbo (Italy). The acquisitions of ultraviolet fluorescence and infrared frames were performed using a Nikon D5300 digital SLR camera and a modified low-cost digital camera (Samsung Model NX3300), respectively. The three-dimensional UV and IR models were obtained using Agisoft PhotoScan ® software. The generated ultraviolet 3D model of the bust makes visible, in a single file, the fluorescence induced by UV radiation on the entire sculpture, highlighting surface abrasions, organic dyes, and ancient protective features. The infrared 3D model allowed for better definition of the details of the drawing used for eyes, nose and mouth definition. In conclusion, the ultraviolet fluorescence and IR 3D models of Saint Rodonio were particularly useful as documentation tools for the conservation status and for the painting construction, allowing us to perfectly map the original and restoration materials and to detect the drawing in single dynamic 3D files following a totally non-invasive, cost-effective, and rapid approach.

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“…361 Monitoring the progress of the photooxidative reactions is critical in the development of protective coatings for wood. 362 However, the spectroscopic methods used are tedious. The rate of yellowing was shown to be well correlated with changes due to oxidation as visualised by infra-red and novel hyperspectral imaging for photodegradation of chestnut wood under simulated solar UV radiation.…”

Section: Surface Yellowing Of Wood On Exposure To Uv Radiation Is Correlated With the Extent Of Chemical Modification Allowing Simpler Momentioning

confidence: 99%

Environmental effects of ozone depletion and its interactions with climate change: Progress report, 2016

Panel¹

2017

Photochem Photobiol Sci

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The Parties to the Montreal Protocol are informed by three Panels of experts. One of these is the Environmental Effects Assessment Panel (EEAP), which deals with two focal issues. The first focus is the effects of UV radiation on human health, animals, plants, biogeochemistry, air quality, and materials. The second focus is on interactions between UV radiation and global climate change and how these may affect humans and the environment. When considering the effects of climate change, it has become clear that processes resulting in changes in stratospheric ozone are more complex than previously believed. As a result of this, human health and environmental issues will be longer-lasting and more regionally variable. Like the other Panels, the EEAP produces a detailed report every four years; the most recent was published as a series of seven papers in 2015 (Photochem. Photobiol. Sci., 2015, 14, 1-184). In the years in between, the EEAP produces less detailed and shorter Progress Reports of the relevant scientific findings. The most recent of these was for 2015 (Photochem. Photobiol. Sci., 2016, 15, 141-147). The present Progress Report for 2016 assesses some of the highlights and new insights with regard to the interactive nature of the direct and indirect effects of UV radiation, atmospheric processes, and climate change. The more detailed Quadrennial Assessment will be made available in 2018.

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Protective behaviour monitoring on wood photo-degradation by spectroscopic techniques coupled with chemometrics

Cited by 30 publications

References 41 publications

Effectiveness of Two Different Hydrophobic Topcoats for Increasing of Durability of Exterior Coating Systems on Oak Wood

Effectiveness of Two Different Hydrophobic Topcoats for Increasing of Durability of Exterior Coating Systems on Oak Wood

A New Practical Approach for 3D Documentation in Ultraviolet Fluorescence and Infrared Reflectography of Polychromatic Sculptures as Fundamental Step in Restoration

Environmental effects of ozone depletion and its interactions with climate change: Progress report, 2016

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