Low-cost and fast synthesis of nanoporous silica cryogels for thermal insulation applications

Li Fen Su; Lei Miao; Sakae Tanemura; Gang Xu

doi:10.1088/1468-6996/13/3/035003

Low-cost and fast synthesis of nanoporous silica cryogels for thermal insulation applications

Li Fen Su, Lei Miao, Sakae Tanemura, Gang Xu

Research output: Contribution to journal › Article › peer-review

28 Citations (Scopus)

Abstract

Nanoporous silica cryogels with a high specific surface area of 1095m ²g ¹ were fabricated using tert-butyl alcohol as a reaction solvent, via a cost-effective sol-gel process followed by vacuum freeze drying. The total time of cryogel production was reduced markedly to one day. The molar ratio of solvent/precursor, which was varied from 5 to 13, significantly affected the porous structure and thermal insulating properties of the cryogels. The silica cryogels with low densities in the range of 0.08-0.18gcm ³ and thermal conductivities as low as 6.7mW(m·K) ¹ at 100Pa and 28.3mW(m·K) ¹ at 10 ⁵Pa were obtained using this new technique.

Original language	English
Article number	035003
Journal	Science and Technology of Advanced Materials
Volume	13
Issue number	3
DOIs	https://doi.org/10.1088/1468-6996/13/3/035003
Publication status	Published - 2012 Jun
Externally published	Yes

Keywords

silica cryogels
tert-butyl alcohol
thermal insulating
vacuum freeze drying

ASJC Scopus subject areas

Materials Science(all)

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10.1088/1468-6996/13/3/035003

Cite this

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title = "Low-cost and fast synthesis of nanoporous silica cryogels for thermal insulation applications",

abstract = "Nanoporous silica cryogels with a high specific surface area of 1095m 2g 1 were fabricated using tert-butyl alcohol as a reaction solvent, via a cost-effective sol-gel process followed by vacuum freeze drying. The total time of cryogel production was reduced markedly to one day. The molar ratio of solvent/precursor, which was varied from 5 to 13, significantly affected the porous structure and thermal insulating properties of the cryogels. The silica cryogels with low densities in the range of 0.08-0.18gcm 3 and thermal conductivities as low as 6.7mW(m·K) 1 at 100Pa and 28.3mW(m·K) 1 at 10 5Pa were obtained using this new technique.",

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T1 - Low-cost and fast synthesis of nanoporous silica cryogels for thermal insulation applications

AU - Su, Li Fen

AU - Miao, Lei

AU - Tanemura, Sakae

AU - Xu, Gang

PY - 2012/6

Y1 - 2012/6

N2 - Nanoporous silica cryogels with a high specific surface area of 1095m 2g 1 were fabricated using tert-butyl alcohol as a reaction solvent, via a cost-effective sol-gel process followed by vacuum freeze drying. The total time of cryogel production was reduced markedly to one day. The molar ratio of solvent/precursor, which was varied from 5 to 13, significantly affected the porous structure and thermal insulating properties of the cryogels. The silica cryogels with low densities in the range of 0.08-0.18gcm 3 and thermal conductivities as low as 6.7mW(m·K) 1 at 100Pa and 28.3mW(m·K) 1 at 10 5Pa were obtained using this new technique.

AB - Nanoporous silica cryogels with a high specific surface area of 1095m 2g 1 were fabricated using tert-butyl alcohol as a reaction solvent, via a cost-effective sol-gel process followed by vacuum freeze drying. The total time of cryogel production was reduced markedly to one day. The molar ratio of solvent/precursor, which was varied from 5 to 13, significantly affected the porous structure and thermal insulating properties of the cryogels. The silica cryogels with low densities in the range of 0.08-0.18gcm 3 and thermal conductivities as low as 6.7mW(m·K) 1 at 100Pa and 28.3mW(m·K) 1 at 10 5Pa were obtained using this new technique.

KW - silica cryogels

KW - tert-butyl alcohol

KW - thermal insulating

KW - vacuum freeze drying

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Low-cost and fast synthesis of nanoporous silica cryogels for thermal insulation applications

Abstract

Keywords

ASJC Scopus subject areas

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