Volume 3, Issue 1 (Spring 2020)                   knowl Cons Rest 2020, 3(1): 63-76 | Back to browse issues page

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Mohammadi Achachluei M, Ahmadi H, Pourtahmasbi K. Evaluation of Nano Zinc Oxide Treatment for Conservation of White Poplar Wood (Populus alba L.) Against Photochemical Weathering. knowl Cons Rest. 2020; 3 (1) :63-76
URL: http://kcr.richt.ir/article-6-136-en.html
1- Assistant Professor, Department of Archaeometry and Conservation of Cultural and Historic Properties, Art University of Isfahan, Isfahan, Iran.
2- Associate Professor, Dean of the Faculty, Department for Conservation of Historic-Cultural Objects, Faculty of Conservation, Art University of Isfahan, Isfahan, Iran , h.ahmadi@aui.ac.ir
3- Professor, Department of Wood and Paper, Faculty of Natural Resources, University of Tehran, Tehran, Iran.
Abstract:   (883 Views)

Wood is an organic material which has been used for manufacturing of different historic relics. There are many historic wooden relics in open air spaces under effect of environmental factors. Weathering and its photochemical decay is one of the most important degradation factors of these relics in dry and semi dry climates. Therefore, it is necessary to study different procedures for conservation of these relics. Nano Zinc Oxide characteristics were studied as a conservation treatment for wood against photochemical weathering. Samples were prepared from White Poplar (Populus alba L.) as a widely used wood in historic relics of Iran. Specimens were treated with Nano Zinc Oxide suspension in isopropanol by surface treatment. Specimens were artificially weathered regarding to ASTM 2565-99 in 300, 800 and 2000 hours as three time levels. Samples were analyzed by evaluation of mass loss, pH measurement, Colorimeter, and ATR-FTIR spectroscopy. Results showed that the treatment does not prevent aesthetical change of wood appearance in weathering process although the alteration was not severe. The treatment reduces weathering effects but does not prevent its structural degradation. During the time and under effect of weathering, Zinc Oxide nanoparticles will lose their function as ultraviolet absorbent due to chemical reactions with wood structures and first degradation products. Therefore, its efficiency won’t be enough in long term period.

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Type of Study: Research | Subject: Iran Heritage
Received: 2020/04/28 | Accepted: 2020/06/30 | Published: 2020/06/30

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