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Improvement of mechanical, humidity resistance and thermal properties of heat-treated rubber wood by impregnation of SiO(2) precursor

The SiO(2) 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 SiO(2) precursor before heat treatment (ISB) and after heat...

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Autores principales: Zhang, Nannan, Xu, Min, Cai, Liping
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6353935/
https://www.ncbi.nlm.nih.gov/pubmed/30700757
http://dx.doi.org/10.1038/s41598-018-37363-3
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author Zhang, Nannan
Xu, Min
Cai, Liping
author_facet Zhang, Nannan
Xu, Min
Cai, Liping
author_sort Zhang, Nannan
collection PubMed
description The SiO(2) 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 SiO(2) 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 SiO(2) 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 SiO(2) precursor had slight effect on the crystalline structure of the wood.
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spelling pubmed-63539352019-01-31 Improvement of mechanical, humidity resistance and thermal properties of heat-treated rubber wood by impregnation of SiO(2) precursor Zhang, Nannan Xu, Min Cai, Liping Sci Rep Article The SiO(2) 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 SiO(2) 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 SiO(2) 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 SiO(2) precursor had slight effect on the crystalline structure of the wood. Nature Publishing Group UK 2019-01-30 /pmc/articles/PMC6353935/ /pubmed/30700757 http://dx.doi.org/10.1038/s41598-018-37363-3 Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Zhang, Nannan
Xu, Min
Cai, Liping
Improvement of mechanical, humidity resistance and thermal properties of heat-treated rubber wood by impregnation of SiO(2) precursor
title Improvement of mechanical, humidity resistance and thermal properties of heat-treated rubber wood by impregnation of SiO(2) precursor
title_full Improvement of mechanical, humidity resistance and thermal properties of heat-treated rubber wood by impregnation of SiO(2) precursor
title_fullStr Improvement of mechanical, humidity resistance and thermal properties of heat-treated rubber wood by impregnation of SiO(2) precursor
title_full_unstemmed Improvement of mechanical, humidity resistance and thermal properties of heat-treated rubber wood by impregnation of SiO(2) precursor
title_short Improvement of mechanical, humidity resistance and thermal properties of heat-treated rubber wood by impregnation of SiO(2) precursor
title_sort improvement of mechanical, humidity resistance and thermal properties of heat-treated rubber wood by impregnation of sio(2) precursor
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6353935/
https://www.ncbi.nlm.nih.gov/pubmed/30700757
http://dx.doi.org/10.1038/s41598-018-37363-3
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AT cailiping improvementofmechanicalhumidityresistanceandthermalpropertiesofheattreatedrubberwoodbyimpregnationofsio2precursor