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Robust Silica–Agarose Composite Aerogels with Interpenetrating Network Structure by In Situ Sol–Gel Process
Aerogels are three-dimensional nanoporous materials with outstanding properties, especially great thermal insulation. Nevertheless, their extremely high brittleness restricts their practical application. Recently, although the mechanical properties of silica aerogels have been improved by regulating...
Autores principales: | , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9141877/ https://www.ncbi.nlm.nih.gov/pubmed/35621601 http://dx.doi.org/10.3390/gels8050303 |
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author | Yang, Xin Jiang, Pengjie Xiao, Rui Fu, Rui Liu, Yinghui Ji, Chao Song, Qiqi Miao, Changqing Yu, Hanqing Gu, Jie Wang, Yaxiong Sai, Huazheng |
author_facet | Yang, Xin Jiang, Pengjie Xiao, Rui Fu, Rui Liu, Yinghui Ji, Chao Song, Qiqi Miao, Changqing Yu, Hanqing Gu, Jie Wang, Yaxiong Sai, Huazheng |
author_sort | Yang, Xin |
collection | PubMed |
description | Aerogels are three-dimensional nanoporous materials with outstanding properties, especially great thermal insulation. Nevertheless, their extremely high brittleness restricts their practical application. Recently, although the mechanical properties of silica aerogels have been improved by regulating the precursor or introducing a polymer reinforcer, these preparation processes are usually tedious and time-consuming. The purpose of this study was to simplify the preparation process of these composite aerogels. A silicic acid solution treated with cation exchange resin was mixed with agarose (AG) to gel in situ, and then composite aerogels (CAs) with an interpenetrating network (IPN) structure were obtained by aging and supercritical CO(2) fluid (SCF) drying. Compared to previous works, the presented CAs preparation process is briefer and more environmentally friendly. Moreover, the CAs exhibit a high specific surface area (420.5 m(2)/g), low thermal conductivity (28.9 mW m(−1) K(−1)), excellent thermal insulation properties, and thermal stability. These results show that these CAs can be better used in thermal insulation. |
format | Online Article Text |
id | pubmed-9141877 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-91418772022-05-28 Robust Silica–Agarose Composite Aerogels with Interpenetrating Network Structure by In Situ Sol–Gel Process Yang, Xin Jiang, Pengjie Xiao, Rui Fu, Rui Liu, Yinghui Ji, Chao Song, Qiqi Miao, Changqing Yu, Hanqing Gu, Jie Wang, Yaxiong Sai, Huazheng Gels Article Aerogels are three-dimensional nanoporous materials with outstanding properties, especially great thermal insulation. Nevertheless, their extremely high brittleness restricts their practical application. Recently, although the mechanical properties of silica aerogels have been improved by regulating the precursor or introducing a polymer reinforcer, these preparation processes are usually tedious and time-consuming. The purpose of this study was to simplify the preparation process of these composite aerogels. A silicic acid solution treated with cation exchange resin was mixed with agarose (AG) to gel in situ, and then composite aerogels (CAs) with an interpenetrating network (IPN) structure were obtained by aging and supercritical CO(2) fluid (SCF) drying. Compared to previous works, the presented CAs preparation process is briefer and more environmentally friendly. Moreover, the CAs exhibit a high specific surface area (420.5 m(2)/g), low thermal conductivity (28.9 mW m(−1) K(−1)), excellent thermal insulation properties, and thermal stability. These results show that these CAs can be better used in thermal insulation. MDPI 2022-05-16 /pmc/articles/PMC9141877/ /pubmed/35621601 http://dx.doi.org/10.3390/gels8050303 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/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 (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Yang, Xin Jiang, Pengjie Xiao, Rui Fu, Rui Liu, Yinghui Ji, Chao Song, Qiqi Miao, Changqing Yu, Hanqing Gu, Jie Wang, Yaxiong Sai, Huazheng Robust Silica–Agarose Composite Aerogels with Interpenetrating Network Structure by In Situ Sol–Gel Process |
title | Robust Silica–Agarose Composite Aerogels with Interpenetrating Network Structure by In Situ Sol–Gel Process |
title_full | Robust Silica–Agarose Composite Aerogels with Interpenetrating Network Structure by In Situ Sol–Gel Process |
title_fullStr | Robust Silica–Agarose Composite Aerogels with Interpenetrating Network Structure by In Situ Sol–Gel Process |
title_full_unstemmed | Robust Silica–Agarose Composite Aerogels with Interpenetrating Network Structure by In Situ Sol–Gel Process |
title_short | Robust Silica–Agarose Composite Aerogels with Interpenetrating Network Structure by In Situ Sol–Gel Process |
title_sort | robust silica–agarose composite aerogels with interpenetrating network structure by in situ sol–gel process |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9141877/ https://www.ncbi.nlm.nih.gov/pubmed/35621601 http://dx.doi.org/10.3390/gels8050303 |
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