Open Access

ARTICLE

Study on Improvement of Hygroscopicity of Magnesite-Bonded Wood Wool Panel

Li Luo^*, Xiaoyu Wang, Kang Zhou, Shenjian Ni, Xiaonin Lu, Bin Na^*

Nanjing Forestry University, Nanjing, 210037, China

* Corresponding Authors: Li Luo. Email: ; Bin Na. Email:

(This article belongs to the Special Issue: Renewable building materials and properties)

Journal of Renewable Materials 2021, 9(10), 1795-1803. https://doi.org/10.32604/jrm.2021.015027

Received 17 November 2020; Accepted 09 February 2021; Issue published 12 May 2021

Abstract

Magnesite-bonded wood wool panel (MWWP) is an inorganic-bonded panel product in which wood excelsior is bonded with magnesite. Lowering the hygroscopicity is one of the key measures to improve the quality of the panel. In this study, moisture absorption mechanism of MWWP and measures generally applied to lower its hygroscopicity were reviewed. Three methods were then experimented to improve the dimensional stability of the panel, including adjusting the molar ratio of raw materials, adding additives and optimizing the conditioning process. The results showed that satisfying dimensional stability could be achieved when the molar ratio of MgO to MgCl₂ was 5:1, the No.2 composite additive (aluminum powder + NH₄H₂PO₄ + ferric alum) was adopted and a constant temperature and humidity treatment was applied in the first stage of conditioning.

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