Improvement of mechanical, humidity resistance and thermal properties of heat-treated rubber wood by impregnation of SiO₂ precursor

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This article proposes a novel methodology by impregnating SiO₂ precursor solution into the heat-treated wood to improve the mechanical properties.

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9 p.

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Zhang, Nannan; Xu, Min & Cai, Liping January 30, 2019.

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This article is part of the collection entitled: UNT Scholarly Works and was provided by UNT College of Engineering to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 153 times , with 153 in the last month . More information about this article can be viewed below.

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  • Cai, Liping Nanjing Forestry University; University of North Texas

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This article proposes a novel methodology by impregnating SiO₂ precursor solution into the heat-treated wood to improve the mechanical properties.

Physical Description

9 p.

Notes

Abstract: The SiO2 precursor solution was impregnated into heat-treated rubber wood to enhance its mechanical and flame-retarding properties. Test specimens were randomly divided into four groups, i.e., untreated (U), heat-treated (HT), impregnated SiO2 precursor before heat treatment (ISB) and after heat treatment (ISA). Results showed that, compared with HT wood specimens, the modulus of rupture (MOR) and compression strength of ISB and ISA wood specimens were both increased. The hygroscopicity of modified wood was decreased and the dimension stability was consequently improved. Surprisingly, the hardness of ISB specimens increased by 43.65%. The thermogravimetric (TG) examination showed that the incorporation of silicon retarded the thermal decomposition and improved the thermal stability of wood. Furthermore, the scanning electron microscopy (SEM) and energy dispersive X-ray analysis (EDXA) revealed that the SiO2 gel was deposited in the cell wall, The Fourier transform infrared spectroscopy (FTIR) showed the formation of Si–O–Si and Si–O–C covalent bonds. The X-ray diffraction (XRD) tests indicated that the impregnation of SiO2 precursor had slight effect on the crystalline structure of the wood.

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  • Scientific Reports, 2019, London, UK: Nature Publishing Group

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  • Publication Title: Scientific Reports
  • Volume: 9
  • Page Start: 1
  • Page End: 9
  • Peer Reviewed: Yes

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UNT Scholarly Works

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Submitted Date

  • June 18, 2018

Accepted Date

  • December 6, 2018

Creation Date

  • January 30, 2019

Added to The UNT Digital Library

  • Feb. 11, 2019, 9:44 a.m.

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Zhang, Nannan; Xu, Min & Cai, Liping. Improvement of mechanical, humidity resistance and thermal properties of heat-treated rubber wood by impregnation of SiO₂ precursor, article, January 30, 2019; London, United Kingdom. (digital.library.unt.edu/ark:/67531/metadc1451150/: accessed February 20, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT College of Engineering.