Influence of Hygrothermal Modification on Surface Characteristics and Failure Modes of Poplar Wood

Hajihassani, Reza; Ghahri, Saman; Salehi, Kamyar; Golbabaei, Fardad; Masoomeh, Seyedeh

doi:10.22092/ijwpr.2021.353262.1656

Document Type : Research Paper

Authors

¹ Assistant Prof., Wood and forest products division, Research Institute of Forests and Rangelands, Agricultural Research Education and Extension Organization (AREEO), Tehran, Iran

² Assistant Prof., Research Institute of Forests and Rangelands, Agricultural Research Education and Extension Organization (AREEO) P.O. Box 13185-116, Tehran, Iran

³ MSc., Wood and Paper Science Research Division, Research Institute of Forests and Rangelands , Iran

⁴ Wood and Forest Products Science Research Division, Research Institute of Forests and Rangelands, Agricultural Research Education and Extension Organization (AREEO) P.O. Box 13185-116, Tehran, Iran

⁵ Research Institute of Forests and Rangelands, Agricultural Research Education and Extension Organization (AREEO) P.O. Box 13185-116, Tehran, Iran

https://doi.org/10.22092/ijwpr.2021.353262.1656

Abstract

Abstract
In the current research, surface properties and failure modes of modified poplar wood (Populus deltoides) by hygrothermal treatment were evaluated. For this aim, the effect of variable factors included hygrothermal temperature (three levels: 130, 150 and 170°C) and holding time (two levels: 20 and 40 minutes) on poplar wood specimens properties (contact angle and surface roughness) prior to and after planning were investigated.
The surface characteristics and failure modes were evaluated for both treated and untreated wood specimens. The results revealed that surface roughness of poplar wood was enhanced due to the hygrothermal treatment in both states of before and after planning. It was also found that the hygrothermal treatment decreased contact angle of distilled water. The bending strength of specimens was reduced by hygrothermal treatment. According to the results, failure modes of hygrothermally treated specimens were simple and compression types in bending strength test.

Keywords: Surface roughness, contact angle, bending strength, failure mode

Keywords

20.1001.1.17350913.1400.36.2.4.4

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Influence of Hygrothermal Modification on Surface Characteristics and Failure Modes of Poplar Wood

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Volume 36, Issue 2 - Serial Number 75July 2021Pages 132-143

Volume 36, Issue 2 - Serial Number 75
July 2021
Pages 132-143