Research progress on mechanical properties enhancement of SiO2 aerogels

被引：0
|
作者：
Zhan W. [1 ]
Shi F. [1 ]
Li L. [1 ]
Chen L. [2 ]
Chen M. [1 ]
Kong Q. [1 ]
Zhang Q. [3 ]
机构：
[1] School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang
[2] School of Electronic Science and Engineering, Nanjing University, Nanjing
[3] College of Safety Science and Engineering, Nanjing Tech University, Nanjing
来源：
Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2023年 / 40卷 / 09期
基金：
中国国家自然科学基金;
关键词：
aerogel; fiber; fireproof and heat insulation; mechanical properties; nanomaterial; process optimization; SiO[!sub]2[!/sub; strength;
D O I：
10.13801/j.cnki.fhclxb.20230420.001
中图分类号：
学科分类号：
摘要：
With the rapid development of society, latent fire hazards have a great threat to social security. Fire prevention and control can be effectively carried out by using fire insulation materials. Aerogels have the characteristics of low density, low thermal conductivity, high porosity, and exhibit excellent fire insulation properties. SiO2 aerogel is the typical representative of aerogel materials and widely used in many industries. However, SiO2 aerogel still has the bottleneck problem of poor mechanical properties at present, resulting in greatly limits for the engineering application. Therefore, it is necessary to introduce reinforcements to make SiO2 aerogel maintain its own excellent characteristics and enhance its mechanical properties. In this paper, the current research status of reinforced SiO2 materials is briefly described, then the methods of improving mechanical properties by optimizing the process and adding nanomaterials, fibers, compacts in the preparation of silica aerogels are discussed and analyzed. Finally, this paper proposed the future research direction and development suggestions of SiO2 aerogels . © 2023 Beijing University of Aeronautics and Astronautics (BUAA). All rights reserved.
引用
收藏
页码：4958 / 4971
页数：13
相关论文
共 103 条
  • [31] WANG Ni, REN Hongbo, Investigation process of silica aerogels synthesized by different types of silica re-courses, Materials Reports, 28, 1, pp. 42-45, (2014)
  • [32] MA Liguo, SUN Yanrong, LI Donglai, Et al., Research progress on silicon source selection of silica aerogel, Inorganic Chemicals Industry, 52, 8, pp. 11-16, (2020)
  • [33] SHAO Z D, LUO F Z, CHENG X, Et al., Superhydrophobic sodium silicate based silica aerogel prepared by ambient pressure drying[J], Materials Chemistry and Physics, 141, 1, pp. 570-575, (2013)
  • [34] SINKO K., Influence of chemical conditions on the nano-porous structure of silicate aerogels[J], Materials, 3, 1, pp. 704-740, (2010)
  • [35] HE S, CHEN X F., Flexible silica aerogel based on methyltrimethoxysilane with improved mechanical property[J], Journal of Non-Crystalline Solids, 463, pp. 6-11, (2017)
  • [36] ZHAO Y, LI Y, ZHANG R B., Silica aerogels having high flexibility and hydrophobicity prepared by sol-gel method[J], Ceramics International, 44, 17, pp. 21262-21268, (2018)
  • [37] ZHANG Y, XIANG L, SHEN Q Q, Et al., Rapid synthesis of dual-mesoporous silica aerogel with excellent adsorption capacity and ultra-low thermal conductivity[J], Journal of Non-Crystalline Solids, 555, 1-7, (2020)
  • [38] SMITHA S, SHAJESH P, ARAVIND P R, Et al., Effect of aging time and concentration of aging solution on the porosity characteristics of subcritically dried silica aerogels[J], Microporous and Mesoporous Materials, 91, 1-3, pp. 286-292, (2006)
  • [39] HAEREID S, DAHLE M, LIMA S, Et al., Preparation and properties of monolithic silica xerogels from TEOS-based alcogels aged in silane solutions[J], Journal of Non-Crystalline Solids, 186, pp. 96-103, (1995)
  • [40] EINARSRUD M A, BRITT KIRKEDELEN M, NILSEN E, Et al., Structural development of silica gels aged in TEOS[J], Journal of Non-Crystalline Solids, 231, 1-2, pp. 10-16, (1998)
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