Application of spectroscopic techniques for the study of the surface changes in poplar wood and possible implications in conservation of wooden artefacts

Pelosi, Claudia; Agresti, Giorgia; Calienno, Luca; Monaco, Angela Lo; Picchio, Rodolfo; Santamaria, Ulderico; Vinciguerra, Vittorio

doi:10.1117/12.2020418

Cited by 17 publications

(18 citation statements)

References 23 publications

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“…When the treatment duration increases, the mechanical strengths could decrease from 15 to 58% of the initial strength, depending on each treatment Sustainability 2017, 9, 1444 3 of 11 procedure and each mechanical property. On the other hand, the treatments usually lead to the color changes [8], [15][16][17] which is an undesirable effect. The present paper also investigates the oil-heated treatment, but with other kinds of oils, such as flax oil and sunflower oil.…”

Section: Introductionmentioning

confidence: 99%

A Bamboo Treatment Procedure: Effects on the Durability and Mechanical Performance

2017

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Bamboo is a natural material having a fast reproduction and high mechanical strengths. However, when a bio-based material in general, and bamboo in particular are expected to be a construction material, their sensitivity to moisture and their durability are usually questionable. Indeed, it is well known that these materials do not possess the same performance in the long-term, when compared to industrial materials. Sustainable solutions for the bamboo treatment still need to be investigated. The present study explores the oil-heated treatment with different types of oils, like flax or sunflower oils. The present investigation concentrates on mechanical properties and durability of treated bamboos to assess the effectiveness of these kinds of treatment. First, bamboo specimens were treated to decrease their sensitivity to moisture and improve their durability. Different conditions of treatment were tested: treatment at 100 • C or 180 • C; with flax oil, sunflower oil, or without oil; treatment durations of 1 h, 2 h, or 3 h; and, different cooling methods and cooling durations. Then, mechanical and durability tests were carried out on untreated and treated bamboos: uniaxial compression tests, 3 points bending tests, water immersion tests, and humidity tests. The results showed that some tested treatment methods could increase both the durability and the compressive strength of treated specimens, compared to untreated bamboo. The best results were observed on specimens treated at 180 • C during 1 h or 2 h without oil, and then cooled in 20 • C sunflower oil.

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Section: Introductionmentioning

confidence: 99%

A Bamboo Treatment Procedure: Effects on the Durability and Mechanical Performance

2017

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“…Post-hoc tests were conducted with Tukey HSD test method. Linear and non-linear regression analysis was used to develop prediction models (Agresti et al, 2013;Calienno et al, 2014;Calienno et al, 2015;Pelosi et al, 2013a). Laser tests were carried out with the MDTT45 Qswitched Nd:YAG system supplied by MEDICAM, changing the irradiation conditions in order to find the threshold values of fluence useful to remove the brownish surface layer without damaging the wood support of the investigated artifact.…”

Section: Methodsmentioning

confidence: 99%

“…The important variation of colour on poplar wood surface exposed to photo-irradiation is mainly due to L* decrease and b* increase (Tab 1, 2 and 3) (Agresti et al, 2013;Pelosi et al, 2013a). FTIR spectroscopy allowed to investigate the rate of photo-degradation of wood surface due to lignin oxidation (Tab.…”

Section: Poplarmentioning

confidence: 99%

“…Colour variation of wood due to light radiation is an interesting and important topic in wood science as testified by a lot of literature papers concerning the photo-oxidation of wood surfaces (Agresti et al, 2013;Calienno et al, 2014;Calienno et al, 2015;Hon and Shiraishi, 2001;Lo Monaco et al, 2011;Pelosi et al, 2013a;Teacǎ et al, 2013;Tolvaj and Mitsui, 2010;Tolvaj et al, 2013). Colour variations on wood surfaces are due to photo-degradation of its chemical constituents, therefore the study of the relationship between colour and chemical changes caused by irradiation is of practical and theoretical importance for the understanding of degradation phenomena (Teacǎ et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

“…The colour change is the most sensitive method to determine the extent of photo-degradation of wood exposed to ultraviolet and visible radiation. The obtained data were correlated to check the relationship between variation of colour and of the chemical components (Agresti et al, 2013;Calienno et al, 2014;Calienno et al, 2015;Pelosi et al, 2013a).…”

Section: Introductionmentioning

confidence: 99%

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Brun¹,

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2015

Atti Del Secondo Congresso Internazionale Di Selvicoltura = Proceedings of the Second International Congress of Silviculture

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Quanto esposto è di esclusiva proprietà scientifica e intellettuale degli Autori ed esclude ogni responsabilità del curatore e dell'Editore. Intellectual and scientific property is exclusively of the authors of each contribution and does not entail responsibility of the editor and the publisher Con il patrocinio di / Under the Patronage of-Presidenza del Consiglio dei Ministri -Ministero delle politiche agricole alimentari e forestali -Ministero dei beni e delle attività culturali e del turismo -Ministero dell'ambiente e della tutela del territorio e del mare -Conferenza delle Regioni e delle Province Autonome -Expo Milano 2015 -La Toscana verso EXPO -Toscana Promozione -Università di Firenze -Consiglio per la Ricerca e la Sperimentazione in Agricoltura -Progetto Integral -Istituto Nazionale di Economia Agraria -GESAAF-Dipartimento di gestione dei sistemi agrari, alimentari e forestali dell'università di Firenze -Provincia di Firenze -Comune di Firenze -Accademia dei Georgofili -Consiglio dell'Ordine Nazionale dei dottori agronomi e dei Dottori Forestali (CONAF) -Società Italiana di Selvicoltura ed Ecologia Forestale (SISEF) -Unione Nazionale delle Accademie per le Scienze Applicate allo Sviluppo dell'Agricoltura, alla Sicurezza Alimentare ed alla Tutela Ambientale (UNASA) -Unione Zoologica Italiana Con il contributo di / SESSION 1 -ECOLOGY, BIODIVERSITY, GENETICS AND FOREST ADAPTATION PROCESSES TO CLIMATE CHANGE Chairpersons Marco Borghetti, Raffaello GianniniRelazioni Orali / Oral presentations Paffetti D., Fiorentini S., Vettori C., Bottalico F., Buonamici A., Maltoni A., Nocentini S., Giannini R., Travaglini D. -La struttura genetica spaziale della diversità genetica può essere utilizzata come indicatore di vetustà dei boschi di faggio? Primi risultati in Italia centrale - » 208 Lombardi F., Parisi F., Sciarretta A., Campanaro A., Tognetti R., Chirici G., Trematerra P., Marchetti M. -Relazioni tra struttura forestale, indicatori di naturalità e fauna saproxilica: un caso studio nell'abetina di "Abeti Soprani" (Molise) After a brief presentation of the policy and scientific debate on the concept of governance as applied to the forestry sector, the paper focuses on 5 statements: (1) the transition from conventional forms of government to new modes of governance is a very progressive process, and never a complete change; (2) the integration of the stakeholders and the public in decision-making processes still provides the main characteristic of governance systems as they presently work; (3) curiously, searching for"good" governance usually leads to a clear re-consideration of the importance of the traditional role of the State, which was never considered as an initial objective; (4) monitoring governance requires specific assessment framework for follow-up; (5) governance does not necessarily lead to sustainability (and vice-versa). Considering that both forest and forestry form a social-ecological system, the presentation calls for re-defining forest action as a process for adapting the objective of sustaina...

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Colour and chemical changes on photodegraded beech wood with or without red heartwood

et al. 2014

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The focus of this study was to investigate the chemical and colour changes occurring at different exposure times on artificially photo-irradiated surfaces of normal and red heartwood in beech in order to understand the mechanisms that cause the changes and to evaluate the possibility of usages of beech not only for energy production purposes. In this sense, surface colour modifications are of crucial importance to define the commercial value of beech wood. The artificial photo-irradiation of the wood samples was performed in a Solar Box, equipped with an ultraviolet filter that cuts off the spectrum at 280 nm. Reflectance spectrophotometry and Fourier transform infrared (FTIR) spectroscopy were used to assess artificial sunlight influence. The experimental data were statistically treated to evaluate their significance. Colour monitoring revealed that wood surface colour undergoes an important variation due to photo-irradiation, occurring within the first 24-48 h. Moreover, it was found that the chromatic coordinates (L*a*b*) in normal wood and in red heartwood tended to similar values after 504 h. FTIR spectroscopy allowed for investigating the rate of photodegradation of wood surface due to oxidation reactions of wood components. The results were validated by statistical analysis applied both to the colorimetric and spectroscopic data.

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Application of spectroscopic techniques for the study of the surface changes in poplar wood and possible implications in conservation of wooden artefacts

Cited by 17 publications

References 23 publications

A Bamboo Treatment Procedure: Effects on the Durability and Mechanical Performance

A Bamboo Treatment Procedure: Effects on the Durability and Mechanical Performance

Management and estimate of forest utilization value in Piedmont

Colour and chemical changes on photodegraded beech wood with or without red heartwood

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