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Cast-In-Situ, Large-Sized Monolithic Silica Xerogel Prepared in Aqueous System

This paper reports the preparation of cast-in-situ, large-sized monolithic silica xerogels by a two-step acid–base catalyzed approach under ambient pressure drying. Low-cost industrial silica sol and deionized water were used as the silicon source and the solvent, respectively. Hexadecetyltrimethyla...

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Detalles Bibliográficos
Autores principales: Ding, Wenhui, Wang, Xiaodong, Chen, Dong, Li, Tiemin, Shen, Jun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6100159/
https://www.ncbi.nlm.nih.gov/pubmed/29762470
http://dx.doi.org/10.3390/molecules23051178
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author Ding, Wenhui
Wang, Xiaodong
Chen, Dong
Li, Tiemin
Shen, Jun
author_facet Ding, Wenhui
Wang, Xiaodong
Chen, Dong
Li, Tiemin
Shen, Jun
author_sort Ding, Wenhui
collection PubMed
description This paper reports the preparation of cast-in-situ, large-sized monolithic silica xerogels by a two-step acid–base catalyzed approach under ambient pressure drying. Low-cost industrial silica sol and deionized water were used as the silicon source and the solvent, respectively. Hexadecetyltrimethylammonium bromide (CTAB) was used as a modification agent. Different amounts of polyethylene glycol 400 (PEG400) was added as a pore-forming agent. The prepared silica xerogels under ambient pressure drying have a mesoporous structure with a low density of 221 mg·cm(−3) and a thermal conductivity of 0.0428 W·m(−1)·K(−1). The low-cost and facile preparation process, as well as the superior performance of the monolithic silica xerogels make it a promising candidate for industrial thermal insulation materials.
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spelling pubmed-61001592018-11-13 Cast-In-Situ, Large-Sized Monolithic Silica Xerogel Prepared in Aqueous System Ding, Wenhui Wang, Xiaodong Chen, Dong Li, Tiemin Shen, Jun Molecules Article This paper reports the preparation of cast-in-situ, large-sized monolithic silica xerogels by a two-step acid–base catalyzed approach under ambient pressure drying. Low-cost industrial silica sol and deionized water were used as the silicon source and the solvent, respectively. Hexadecetyltrimethylammonium bromide (CTAB) was used as a modification agent. Different amounts of polyethylene glycol 400 (PEG400) was added as a pore-forming agent. The prepared silica xerogels under ambient pressure drying have a mesoporous structure with a low density of 221 mg·cm(−3) and a thermal conductivity of 0.0428 W·m(−1)·K(−1). The low-cost and facile preparation process, as well as the superior performance of the monolithic silica xerogels make it a promising candidate for industrial thermal insulation materials. MDPI 2018-05-15 /pmc/articles/PMC6100159/ /pubmed/29762470 http://dx.doi.org/10.3390/molecules23051178 Text en © 2018 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
Ding, Wenhui
Wang, Xiaodong
Chen, Dong
Li, Tiemin
Shen, Jun
Cast-In-Situ, Large-Sized Monolithic Silica Xerogel Prepared in Aqueous System
title Cast-In-Situ, Large-Sized Monolithic Silica Xerogel Prepared in Aqueous System
title_full Cast-In-Situ, Large-Sized Monolithic Silica Xerogel Prepared in Aqueous System
title_fullStr Cast-In-Situ, Large-Sized Monolithic Silica Xerogel Prepared in Aqueous System
title_full_unstemmed Cast-In-Situ, Large-Sized Monolithic Silica Xerogel Prepared in Aqueous System
title_short Cast-In-Situ, Large-Sized Monolithic Silica Xerogel Prepared in Aqueous System
title_sort cast-in-situ, large-sized monolithic silica xerogel prepared in aqueous system
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6100159/
https://www.ncbi.nlm.nih.gov/pubmed/29762470
http://dx.doi.org/10.3390/molecules23051178
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