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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| Format: | Article |
| Language: | English |
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MDPI AG
2018-05-01
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| Series: | Molecules |
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| Online Access: | http://www.mdpi.com/1420-3049/23/5/1178 |
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| author | Wenhui Ding Xiaodong Wang Dong Chen Tiemin Li Jun Shen |
| author_facet | Wenhui Ding Xiaodong Wang Dong Chen Tiemin Li Jun Shen |
| author_sort | Wenhui Ding |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-04-13T18:59:52Z |
| format | Article |
| id | doaj.art-0ef028b0511145c084d8ab37d764493b |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-04-13T18:59:52Z |
| publishDate | 2018-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-0ef028b0511145c084d8ab37d764493b2022-12-22T02:34:06ZengMDPI AGMolecules1420-30492018-05-01235117810.3390/molecules23051178molecules23051178Cast-In-Situ, Large-Sized Monolithic Silica Xerogel Prepared in Aqueous SystemWenhui Ding0Xiaodong Wang1Dong Chen2Tiemin Li3Jun Shen4Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology & School of Physics Science and Engineering, Tongji University, Shanghai 200092, ChinaShanghai Key Laboratory of Special Artificial Microstructure Materials and Technology & School of Physics Science and Engineering, Tongji University, Shanghai 200092, ChinaShanghai Key Laboratory of Special Artificial Microstructure Materials and Technology & School of Physics Science and Engineering, Tongji University, Shanghai 200092, ChinaShanghai Key Laboratory of Special Artificial Microstructure Materials and Technology & School of Physics Science and Engineering, Tongji University, Shanghai 200092, ChinaShanghai Key Laboratory of Special Artificial Microstructure Materials and Technology & School of Physics Science and Engineering, Tongji University, Shanghai 200092, ChinaThis 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.http://www.mdpi.com/1420-3049/23/5/1178silica solsurfactantbinder and pore-forming agentambient pressure drying |
| spellingShingle | Wenhui Ding Xiaodong Wang Dong Chen Tiemin Li Jun Shen Cast-In-Situ, Large-Sized Monolithic Silica Xerogel Prepared in Aqueous System Molecules silica sol surfactant binder and pore-forming agent ambient pressure drying |
| 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 | silica sol surfactant binder and pore-forming agent ambient pressure drying |
| url | http://www.mdpi.com/1420-3049/23/5/1178 |
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