Open Access

ARTICLE

High Permeability of Boron along the Transverse Direction of Wood under High-Voltage Electrostatic Field (HVEF) Treatment

by Daiyuan Zhang¹, Qian He², Baocong Du², Junbao Yu^2,3, Xudong Zhu³, Dingyi Yang², Shengcai Li², Tianyi Zhan¹, Liming Shen^1,*, Zhiqiang Wang^1,*, Xiaoning Lu¹

1 College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, 210037, China
2 College of Civil Science and Engineering, Yangzhou University, Yangzhou, 225127, China
3 Yangzhou Polytechnic Institute, Yangzhou, 225100, China

* Corresponding Authors: Liming Shen. Email: ; Zhiqiang Wang. Email:

(This article belongs to the Special Issue: Advanced Wood Composites from Renewable Materials)

Journal of Renewable Materials 2022, 10(3), 721-734. https://doi.org/10.32604/jrm.2022.016793

Received 26 March 2021; Accepted 29 April 2021; Issue published 28 September 2021

Abstract

Permeability of wood preservative is one of the most significant factors for protection of wood construction. Anisotropic flow permeability was involved in different directions of wood with higher flow resistance in the transverse and lower longitudinal directions. In this study, boron acid solution was brushed onto the tangential section of air-dried wood cubes and boron penetration along wood transverse direction was investigated under free diffusion, vacuum and HVEF treatments. Multi-scale boron distribution, FTIR measurement, leaching property, mechanical properties and fungistatic characteristic were investigated for free diffusion, vacuum and HVEF treated samples respectively. The results revealed that boron exhibited high permeability along the transverse direction with the penetration depth of ≈35 mm for HVEF treated samples and ≈1 mm for free diffusion and vacuum treated samples. For HVEF treated samples, no significant decrease of hardness, compression modulus of elasticity and strength were found in the treated samples. Better fungistatic characteristic was showcased in HVEF treated samples exposed to white rot fungi. Thus, HVEF treatment has a positive effect on boron permeability and the improvement of penetration depth of preservatives hence playing a significant role in wood protection and prolonging the service life of wood construction.

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Keywords

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