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Investigation on Water Vapor Adsorption of Silica-Phosphonium Ionic Liquids Hybrid Material
Adsorption and diffusion of water vapor in phosphonium ionic liquid modified silica gel were studied, aiming to reduce the loading of water vapor in porous materials. The modified silica gel was prepared through a grafting method and characterized by FTIR, thermal gravity analysis and X-ray photoele...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6600747/ https://www.ncbi.nlm.nih.gov/pubmed/31159368 http://dx.doi.org/10.3390/ma12111782 |
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author | Li, Cancan Zhu, Jiamei Zhou, Min Zhang, Shuangquan He, Xiaodong |
author_facet | Li, Cancan Zhu, Jiamei Zhou, Min Zhang, Shuangquan He, Xiaodong |
author_sort | Li, Cancan |
collection | PubMed |
description | Adsorption and diffusion of water vapor in phosphonium ionic liquid modified silica gel were studied, aiming to reduce the loading of water vapor in porous materials. The modified silica gel was prepared through a grafting method and characterized by FTIR, thermal gravity analysis and X-ray photoelectron spectroscopy. N(2) sorption isotherms at −196 °C and CO(2) sorption isotherms at 0 °C were also measured to analyzee the porosity. Water vapor adsorption equilibriums at 25 °C up to 30 mbar were tested. The results indicate that the ionic liquids (ILs) phase acts as a protecting film which decreases water vapor adsorption. The improvement of water-resistant performance is also attributed to the decrease of micro-porosity and silanol groups on the silica surface. Diffusion behavior of water vapor on modified silica was determined on the basis of the adsorption equilibrium. The effective diffusivity of water vapor in modified silica is almost the same as in bare silica and decreases with the increasing of water vapor loading. |
format | Online Article Text |
id | pubmed-6600747 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-66007472019-07-16 Investigation on Water Vapor Adsorption of Silica-Phosphonium Ionic Liquids Hybrid Material Li, Cancan Zhu, Jiamei Zhou, Min Zhang, Shuangquan He, Xiaodong Materials (Basel) Article Adsorption and diffusion of water vapor in phosphonium ionic liquid modified silica gel were studied, aiming to reduce the loading of water vapor in porous materials. The modified silica gel was prepared through a grafting method and characterized by FTIR, thermal gravity analysis and X-ray photoelectron spectroscopy. N(2) sorption isotherms at −196 °C and CO(2) sorption isotherms at 0 °C were also measured to analyzee the porosity. Water vapor adsorption equilibriums at 25 °C up to 30 mbar were tested. The results indicate that the ionic liquids (ILs) phase acts as a protecting film which decreases water vapor adsorption. The improvement of water-resistant performance is also attributed to the decrease of micro-porosity and silanol groups on the silica surface. Diffusion behavior of water vapor on modified silica was determined on the basis of the adsorption equilibrium. The effective diffusivity of water vapor in modified silica is almost the same as in bare silica and decreases with the increasing of water vapor loading. MDPI 2019-06-01 /pmc/articles/PMC6600747/ /pubmed/31159368 http://dx.doi.org/10.3390/ma12111782 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Li, Cancan Zhu, Jiamei Zhou, Min Zhang, Shuangquan He, Xiaodong Investigation on Water Vapor Adsorption of Silica-Phosphonium Ionic Liquids Hybrid Material |
title | Investigation on Water Vapor Adsorption of Silica-Phosphonium Ionic Liquids Hybrid Material |
title_full | Investigation on Water Vapor Adsorption of Silica-Phosphonium Ionic Liquids Hybrid Material |
title_fullStr | Investigation on Water Vapor Adsorption of Silica-Phosphonium Ionic Liquids Hybrid Material |
title_full_unstemmed | Investigation on Water Vapor Adsorption of Silica-Phosphonium Ionic Liquids Hybrid Material |
title_short | Investigation on Water Vapor Adsorption of Silica-Phosphonium Ionic Liquids Hybrid Material |
title_sort | investigation on water vapor adsorption of silica-phosphonium ionic liquids hybrid material |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6600747/ https://www.ncbi.nlm.nih.gov/pubmed/31159368 http://dx.doi.org/10.3390/ma12111782 |
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