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Preparation of Hydrophobic Silica Aerogel with High Thermal Stability by Argon Atmosphere Heat Treatment
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Zhi LI1, Yunmeng DENG1, Yang WANG1, Bing DU1, Ming LI1, Qiong LIU1, Xudong CHENG2
Journal of the Chinese Ceramic Society | 2022, 50(5) : 1325 - 1334
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Journal of the Chinese Ceramic Society | 2022, 50(5): 1325-1334
• Research Articles •
Preparation of Hydrophobic Silica Aerogel with High Thermal Stability by Argon Atmosphere Heat Treatment
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Zhi LI1, Yunmeng DENG1, Yang WANG1, Bing DU1, Ming LI1, Qiong LIU1, Xudong CHENG2
Affiliations
  • 1.School of Resource and Safety Engineering, Central South University, Changsha 410083, China
  • 2.University of Science and Technology of China, State Key Laboratory of Fire Science, Hefei 230027, China

    • LI Zhi (1989-), male, Ph.D., Associate Professor. E-mail:

About Author:

LI Zhi (1989-), male, Ph.D., Associate Professor. E-mail:

Published: 2022-05-20 doi: 10.14062/j.issn.0454-5648.20210624
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Improving the thermal stability of silica (SiO2) aerogel plays a crucial role in expanding its heat insulation application. In this work, heat treatment in argon atmosphere was adopted to avoid the thermal oxidative decomposition of hydrophobic groups, which inevitably occurred in the heat treatment in air atmosphere. Also, the physicochemical properties were analyzed. The results show that the hydrophobicity of SiO2 aerogels still maintains at a contact angle of 140° after heat treatment in argon atmosphere at 700 ℃. In the differential scanning calorimetry test in air atmosphere, the peak temperature in exothermic reaction (Tpeak) of heat treated SiO2 aerogels reaches 584 ℃, which is approximately 300 ℃ higher than that of untreated SiO2 aerogels, thus improving the thermal stability. The results obtained also indicate that hydrophobic SiO2 aerogels could be used at high temperatures due to the improved thermal stability and safety.

silica  /  aerogel  /  heat treatment  /  thermal stability  /  argon atmosphere
李治, 邓云猛, 王洋, 杜冰, 李明, 刘琼, 程旭东. 氩气热处理制备高热稳定性疏水SiO2气凝胶. 硅酸盐学报, 2022 , 50 (5) : 1325 -1334 . DOI: 10.14062/j.issn.0454-5648.20210624
Zhi LI, Yunmeng DENG, Yang WANG, Bing DU, Ming LI, Qiong LIU, Xudong CHENG. Preparation of Hydrophobic Silica Aerogel with High Thermal Stability by Argon Atmosphere Heat Treatment[J]. Journal of the Chinese Ceramic Society, 2022 , 50 (5) : 1325 -1334 . DOI: 10.14062/j.issn.0454-5648.20210624
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Year 2022 volume 50 Issue 5
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Article Info
doi: 10.14062/j.issn.0454-5648.20210624
  • Receive Date：2021-07-31
  • Online Date：2026-10-22
  • Published：2022-05-20
Article Data
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History
  • Received：2021-07-31
  • Revised：2021-11-01
Funding
Affiliations
    1.School of Resource and Safety Engineering, Central South University, Changsha 410083, China
    2.University of Science and Technology of China, State Key Laboratory of Fire Science, Hefei 230027, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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