Rapid synthesis of silica aerogels by microwave irradiation

Xinyang Zhang; Zhaofeng Chen; Junxiong Zhang; Qianhua Yu; Sheng Cui

doi:10.1007/s10934-021-01085-1

Rapid synthesis of silica aerogels by microwave irradiation

Xinyang Zhang, Zhaofeng Chen, Junxiong Zhang, Qianhua Yu, Sheng Cui

College of Materials Science and Engineering

Nanjing University of Aeronautics and Astronautics

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

6 Scopus citations

Abstract

Silica aerogels prepared via microwave irradiation using tetraethyl orthosilicate (TEOS) as the precursor are described. The aerogels were obtained after subjecting the entire process under microwave irradiation, significantly reducing the synthesis time to 90 min, which is much shorter than the supercritical CO₂ drying (SCD) method and ambient drying (APD) method. The obtained aerogels under microwave irradiation condition with different power and time exhibit surface areas of 831 m² g⁻¹, average pore sizes of 8.67–12.7 nm, and contact angles of 146.5°. The aerogels are thermally stable and the thermal conductivity is relatively low at 0.028 W m⁻¹ K⁻¹, when the molar ratio of E value (EtOH /TEOS) is 8. The results demonstrate the efficiency of synthesizing silica aerogels via microwave irradiation in the industry.

Original language	English
Pages (from-to)	1469-1479
Number of pages	11
Journal	Journal of Porous Materials
Volume	28
Issue number	5
DOIs	https://doi.org/10.1007/s10934-021-01085-1
State	Published - Oct 2021

Keywords

Hydrophobic
Microwave irradiation
Silica aerogel
Structural characterization
Thermal conductivity

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10.1007/s10934-021-01085-1

Cite this

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title = "Rapid synthesis of silica aerogels by microwave irradiation",

abstract = "Silica aerogels prepared via microwave irradiation using tetraethyl orthosilicate (TEOS) as the precursor are described. The aerogels were obtained after subjecting the entire process under microwave irradiation, significantly reducing the synthesis time to 90 min, which is much shorter than the supercritical CO2 drying (SCD) method and ambient drying (APD) method. The obtained aerogels under microwave irradiation condition with different power and time exhibit surface areas of 831 m2 g−1, average pore sizes of 8.67–12.7 nm, and contact angles of 146.5°. The aerogels are thermally stable and the thermal conductivity is relatively low at 0.028 W m−1 K−1, when the molar ratio of E value (EtOH /TEOS) is 8. The results demonstrate the efficiency of synthesizing silica aerogels via microwave irradiation in the industry.",

keywords = "Hydrophobic, Microwave irradiation, Silica aerogel, Structural characterization, Thermal conductivity",

author = "Xinyang Zhang and Zhaofeng Chen and Junxiong Zhang and Qianhua Yu and Sheng Cui",

note = "Publisher Copyright: {\textcopyright} 2021, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.",

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doi = "10.1007/s10934-021-01085-1",

language = "英语",

volume = "28",

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TY - JOUR

T1 - Rapid synthesis of silica aerogels by microwave irradiation

AU - Zhang, Xinyang

AU - Chen, Zhaofeng

AU - Zhang, Junxiong

AU - Yu, Qianhua

AU - Cui, Sheng

PY - 2021/10

Y1 - 2021/10

N2 - Silica aerogels prepared via microwave irradiation using tetraethyl orthosilicate (TEOS) as the precursor are described. The aerogels were obtained after subjecting the entire process under microwave irradiation, significantly reducing the synthesis time to 90 min, which is much shorter than the supercritical CO2 drying (SCD) method and ambient drying (APD) method. The obtained aerogels under microwave irradiation condition with different power and time exhibit surface areas of 831 m2 g−1, average pore sizes of 8.67–12.7 nm, and contact angles of 146.5°. The aerogels are thermally stable and the thermal conductivity is relatively low at 0.028 W m−1 K−1, when the molar ratio of E value (EtOH /TEOS) is 8. The results demonstrate the efficiency of synthesizing silica aerogels via microwave irradiation in the industry.

AB - Silica aerogels prepared via microwave irradiation using tetraethyl orthosilicate (TEOS) as the precursor are described. The aerogels were obtained after subjecting the entire process under microwave irradiation, significantly reducing the synthesis time to 90 min, which is much shorter than the supercritical CO2 drying (SCD) method and ambient drying (APD) method. The obtained aerogels under microwave irradiation condition with different power and time exhibit surface areas of 831 m2 g−1, average pore sizes of 8.67–12.7 nm, and contact angles of 146.5°. The aerogels are thermally stable and the thermal conductivity is relatively low at 0.028 W m−1 K−1, when the molar ratio of E value (EtOH /TEOS) is 8. The results demonstrate the efficiency of synthesizing silica aerogels via microwave irradiation in the industry.

KW - Hydrophobic

KW - Microwave irradiation

KW - Silica aerogel

KW - Structural characterization

KW - Thermal conductivity

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U2 - 10.1007/s10934-021-01085-1

DO - 10.1007/s10934-021-01085-1

M3 - 文章

AN - SCOPUS:85107059327

SN - 1380-2224

VL - 28

SP - 1469

EP - 1479

JO - Journal of Porous Materials

JF - Journal of Porous Materials

IS - 5

ER -

Rapid synthesis of silica aerogels by microwave irradiation

Abstract

Keywords

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