A comparative study on the effects of linseed oil and shellac treatment on the hygroscopicity, dimensional stability, and color changes of Chinese ash wood

Linseed oil and shellac are natural, environmentally friendly materials with good water repellency. They were used to impregnate Chinese ash wood at room temperature (20 °C) using a vacuum-pressure procedure (consisting of three cycles of 0.01 MPa for 1.5 h and atmospheric pressure for 1.5 h) to imp...

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Bibliographic Details
Published in:Bioresources 2020-11, Vol.15 (4), p.8085-8092
Main Authors: Liu, Mihaela, Tu, Xinwei, Liu, Xinyou, Wu, Zhihui, Lv, Jiufang, Vorodi, Anca Maria
Format: Article
Language:English
Subjects:
Absorption
Ashes
Color
Comparative studies
Dimensional changes
Dimensional stability
Ethanol
Fraxinus chinensis
Hardwoods
Humidity
Hydrophobicity
Hygroscopicity
Impregnation
Landscape architecture
Linseed oil
Moisture
Moisture absorption
Moisture content
Permeability
Physical characteristics
Repellency
Room temperature
Shellac
Stability analysis
Vegetable oils
Wood
Wood products
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Summary:Linseed oil and shellac are natural, environmentally friendly materials with good water repellency. They were used to impregnate Chinese ash wood at room temperature (20 °C) using a vacuum-pressure procedure (consisting of three cycles of 0.01 MPa for 1.5 h and atmospheric pressure for 1.5 h) to improve the dimensional stability of wood. The effects of the impregnation treatment on wood color changes, dimensional stability, moisture absorption, and morphological characteristics were evaluated. The linseed oil and shellac treatment improved the dimensional stability of wood. Linseed oil and shellac displayed good permeability in Chinese ash wood, with weight gains of 21.7% and 19.0%, respectively, after impregnation. The swelling coefficients of treated wood in the tangential and radial directions decreased by 15 to 22%, indicating that impregnation improved the dimensional stability of wood. Linseed oil and shellac solidified and occluded the pits within the wood interior to prevent moisture absorption. This method can be used to improve the dimensional stability of a variety of wood products, such as buildings, furniture, and landscape architecture.
ISSN:1930-2126
1930-2126
DOI:10.15376/biores.15.4.8085-8092