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Modification of hemp shiv properties using water-repellent sol–gel coatings
For the first time, the hydrophilicity of hemp shiv was modified without the compromise of its hygroscopic properties. This research focused on the use of sol–gel method in preparation of coatings on the natural plant material, hemp shiv, that has growing potential in the construction industry as a...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Springer US
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6560928/ https://www.ncbi.nlm.nih.gov/pubmed/31258251 http://dx.doi.org/10.1007/s10971-018-4621-2 |
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author | Hussain, Atif Calabria-Holley, Juliana Jiang, Yunhong Lawrence, Mike |
author_facet | Hussain, Atif Calabria-Holley, Juliana Jiang, Yunhong Lawrence, Mike |
author_sort | Hussain, Atif |
collection | PubMed |
description | For the first time, the hydrophilicity of hemp shiv was modified without the compromise of its hygroscopic properties. This research focused on the use of sol–gel method in preparation of coatings on the natural plant material, hemp shiv, that has growing potential in the construction industry as a thermal insulator. The sol–gel coatings were produced by cohydrolysis and polycondensation of tetraethyl orthosilicate (TEOS) using an acidic catalyst. Methyltriethoxysilane (MTES) was added as the hydrophobic precursor to provide water resistance to the bio-based material. Scanning electron microscopy (SEM) and focused ion beam (FIB) have been used to determine the morphological changes on the surface as well as within the hemp shiv. It was found that the sol–gel coatings caused a reduction in water uptake but did not strongly influence the moisture sorption behaviour of hemp shiv. Fourier transformed infrared (FTIR) spectroscopy shows that the coating layer on hemp shiv acts a shield, thereby lowering peak intensity in the wavelength range 1200–1800 cm(−1). The sol–gel coating affected pore size distribution and cumulative pore volume of the shiv resulting in tailored porosity. The overall porosity of shiv decreased with a refinement in diameter of the larger pores. Thermal analysis was performed using TGA and stability of coated and uncoated hemp shiv have been evaluated. Hemp shiv modified with sol–gel coating can potentially develop sustainable heat insulating composites with better hygrothermal properties. [Image: see text] |
format | Online Article Text |
id | pubmed-6560928 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | Springer US |
record_format | MEDLINE/PubMed |
spelling | pubmed-65609282019-06-26 Modification of hemp shiv properties using water-repellent sol–gel coatings Hussain, Atif Calabria-Holley, Juliana Jiang, Yunhong Lawrence, Mike J Solgel Sci Technol Original Paper: Sol-gel and hybrid materials for energy, environment and building applications For the first time, the hydrophilicity of hemp shiv was modified without the compromise of its hygroscopic properties. This research focused on the use of sol–gel method in preparation of coatings on the natural plant material, hemp shiv, that has growing potential in the construction industry as a thermal insulator. The sol–gel coatings were produced by cohydrolysis and polycondensation of tetraethyl orthosilicate (TEOS) using an acidic catalyst. Methyltriethoxysilane (MTES) was added as the hydrophobic precursor to provide water resistance to the bio-based material. Scanning electron microscopy (SEM) and focused ion beam (FIB) have been used to determine the morphological changes on the surface as well as within the hemp shiv. It was found that the sol–gel coatings caused a reduction in water uptake but did not strongly influence the moisture sorption behaviour of hemp shiv. Fourier transformed infrared (FTIR) spectroscopy shows that the coating layer on hemp shiv acts a shield, thereby lowering peak intensity in the wavelength range 1200–1800 cm(−1). The sol–gel coating affected pore size distribution and cumulative pore volume of the shiv resulting in tailored porosity. The overall porosity of shiv decreased with a refinement in diameter of the larger pores. Thermal analysis was performed using TGA and stability of coated and uncoated hemp shiv have been evaluated. Hemp shiv modified with sol–gel coating can potentially develop sustainable heat insulating composites with better hygrothermal properties. [Image: see text] Springer US 2018-03-10 2018 /pmc/articles/PMC6560928/ /pubmed/31258251 http://dx.doi.org/10.1007/s10971-018-4621-2 Text en © The Author(s) 2018 Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided 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. |
spellingShingle | Original Paper: Sol-gel and hybrid materials for energy, environment and building applications Hussain, Atif Calabria-Holley, Juliana Jiang, Yunhong Lawrence, Mike Modification of hemp shiv properties using water-repellent sol–gel coatings |
title | Modification of hemp shiv properties using water-repellent sol–gel coatings |
title_full | Modification of hemp shiv properties using water-repellent sol–gel coatings |
title_fullStr | Modification of hemp shiv properties using water-repellent sol–gel coatings |
title_full_unstemmed | Modification of hemp shiv properties using water-repellent sol–gel coatings |
title_short | Modification of hemp shiv properties using water-repellent sol–gel coatings |
title_sort | modification of hemp shiv properties using water-repellent sol–gel coatings |
topic | Original Paper: Sol-gel and hybrid materials for energy, environment and building applications |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6560928/ https://www.ncbi.nlm.nih.gov/pubmed/31258251 http://dx.doi.org/10.1007/s10971-018-4621-2 |
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