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Influence of temperature and vacuum level on the drying rate, moisture content distribution, wood color and drying stress of rubberwood in vacuum drying.

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Bibliographic Details
Title: Influence of temperature and vacuum level on the drying rate, moisture content distribution, wood color and drying stress of rubberwood in vacuum drying.
Authors: Yang, Lin1,2 (AUTHOR) yanglin@njfu.edu.cn, Liu, Xuanjiang1,2 (AUTHOR), Li, Tongtong3 (AUTHOR), Li, Jianing3 (AUTHOR)
Source: Wood Material Science & Engineering. Jun2026, Vol. 21 Issue 3, p1650-1656. 7p.
Subjects: Temperature effect, Lumber drying, Drying apparatus, Vaporization, Atmospheric pressure, Hevea, Moisture, Color
Abstract: This article focuses on the vacuum drying process of rubberwood (Hevea brasiliensis) with pith, examining how different vacuum pressures and temperatures affect drying rate, moisture distribution, color change, residual stress, and shrinkage. Experiments conducted at vacuum levels of 0.02 and 0.04 MPa and temperatures of 40°C, 60°C, and 80°C showed that temperature has a more significant impact on drying rate and residual stress than vacuum pressure, while vacuum level more strongly influences color preservation and moisture gradients in thickness. The study identified 0.04 MPa and 60°C as the optimal drying conditions, balancing drying efficiency, uniform moisture removal, minimal color change, and reduced internal stress. These findings contribute to optimizing vacuum drying parameters for rubberwood to improve its quality and market value. [Extracted from the article]
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Database: Engineering Source
Description
Abstract:This article focuses on the vacuum drying process of rubberwood (Hevea brasiliensis) with pith, examining how different vacuum pressures and temperatures affect drying rate, moisture distribution, color change, residual stress, and shrinkage. Experiments conducted at vacuum levels of 0.02 and 0.04 MPa and temperatures of 40°C, 60°C, and 80°C showed that temperature has a more significant impact on drying rate and residual stress than vacuum pressure, while vacuum level more strongly influences color preservation and moisture gradients in thickness. The study identified 0.04 MPa and 60°C as the optimal drying conditions, balancing drying efficiency, uniform moisture removal, minimal color change, and reduced internal stress. These findings contribute to optimizing vacuum drying parameters for rubberwood to improve its quality and market value. [Extracted from the article]
ISSN:17480272
DOI:10.1080/17480272.2025.2509822