Recent progress and applications of aerogels in China

Shen, Jun; Zhang, Xiaoxue

doi:10.1007/s10971-021-05639-2

Cited by 11 publications

(5 citation statements)

References 97 publications

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“…The former requires high safety security but possesses a shorter production cycle. The latter is a safer but slightly longer production cycle [137]. The SCD CO2 process has been implemented at an industrial scale by several companies (see Table A1, see Appendix).…”

Section: Development Of Drying Processesmentioning

confidence: 99%

“…Thanks to many universities, research institutions, and R&D enterprise teams, more than 50 aerogel manufacturers worldwide have adopted different process paths. The overview of the leading aerogel producers worldwide and the commonly-used process routes are listed in Table A2 (see Appendix) and literature [137].…”

Section: Development Status and Challengesmentioning

confidence: 99%

“…The costs incurred from using such reagents have incentivized alternative material feedstocks to be increasingly pursued [158]. In contrast, inorganic precursors (water glass) are cheaper, but their quality fluctuates among the batches [137]. Therefore, there is an urgent need for large-scale production to obtain inorganic silicon sources with stable quality.…”

Section: Perspectives and Outlookmentioning

confidence: 99%

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Silica aerogels: from materials research to industrial applications

Lin

et al. 2023

International Materials Reviews

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Silica aerogels are advanced materials with outstanding properties, including high specific surface area and porosity, low thermal conductivity, density, dielectric constant, and refractive index. However, the excellent properties of silica aerogels have shown limited utility in industrial applications, primarily as thermal insulation materials, where they hold only a small (1.1-2.6%) market share. The emergence of clean energy technologies stimulated renewed interest in silica and other aerogels. Here the recent advances in the production and applications of silica aerogels are summarized, and the current challenges and future development opportunities are discussed. The conventional and emerging syntheses and characterization methods of silica aerogels are introduced, followed by a discussion on thermophysical properties and potential applications. The fabrication processes of silica aerogels are analysed at different industry development stages. Recent advances in aerogels research are considered, highlighting the obstacles and possible solutions for the successful translation and industry uptake and focusing on the emerging applications in electric vehicles and building insulation.

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Section: Development Of Drying Processesmentioning

confidence: 99%

Section: Development Status and Challengesmentioning

confidence: 99%

Section: Perspectives and Outlookmentioning

confidence: 99%

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Silica aerogels: from materials research to industrial applications

Lin

et al. 2023

International Materials Reviews

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“…Currently, global aerogel manufacturers predominantly utilize tetraethoxysilane, known for its stable reaction process, as the silicon source. They then subject it to a series of processing steps, including sols, glass-fiber composites, gels, aging, hydrophobic modifications, solvent replacements, and supercritical drying, to produce silica aerogel composite glass-fiber mats [ 28 , 29 , 30 , 31 ]. While the aerogel insulations produced by these processes have secured their positions in the global market, they remain costly, preventing their widespread adoption in price-sensitive sectors such as construction [ 32 , 33 , 34 , 35 ].…”

Section: Introductionmentioning

confidence: 99%

Cost-Effective Preparation of Hydrophobic and Thermal-Insulating Silica Aerogels

Shan,

Zou

et al. 2024

Nanomaterials

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The aim of this study is to reduce the manufacturing cost of a hydrophobic and heat-insulating silica aerogel and promote its industrial application in the field of thermal insulation. Silica aerogels with hydrophobicity and thermal-insulation capabilities were synthesized by using water-glass as the silicon source and supercritical drying. The effectiveness of acid and alkali catalysis is compared in the formation of the sol. The introduction of sodium methyl silicate for the copolymerization enhances the hydrophobicity of the aerogel. The resultant silica aerogel has high hydrophobicity and a mesoporous structure with a pore volume exceeding 4.0 cm3·g−1 and a specific surface area exceeding 950 m2·g−1. The obtained silica aerogel/fiber-glass-mat composite has high thermal insulation, with a thermal conductivity of less than 0.020 W·m−1·K−1. The cost-effective process is promising for applications in the industrial preparation of silica aerogel thermal-insulating material.

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“…Its heat resistance and bearing capacity directly affect the safety of the entire system. Since the manufacture of aerogel by Kistler [2] , its excellent thermal insulation properties [3] have been attracting attention. With the improvement of the mechanical properties of aerogel [4] , the sandwich structure composed of aerogel core layer and high temperature resistant mullite fiber panel has become a promising aerospace thermal protection structure.…”

Section: Introductionmentioning

confidence: 99%

Optimization of anti-bending deformation of aerogel sandwich thermal protection structure

Yang

Zhang

Tian

et al. 2022

J. Phys.: Conf. Ser.

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The failure of the thermal protection structure is very important to the safety of the aircraft structure. In order to accurately predict the flexural behavior of the aerogel sandwich thermal protection structure, first of all, for the sandwich structure in the form of statically indeterminate beam with variable cross-section, the beam theory considering the transverse shear deformation of the core layer was deduced. Secondly, by comparing the deflections, the forms of deflection curve and the maximum strains of the upper panel, the accuracy of the theoretical prediction was analyzed. Then, according to the requirements of heat protection and integrity of the thermal protection structure, the optimization analyses of the parameters of the core layer, such as the thickness, the density and the elastic modulus, were carried out. The results showed that the beam theory considering the transverse shear deformation of the core layer had better prediction accuracy. The maximum deflection error was the smallest, which was -17%, and the form of the deflection curve was the most reasonable. Within the range of the physical parameters of the core layer studied, the theoretical basis and guiding direction were given for the regulation of the performance of the aerogel core layer.

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Recent progress and applications of aerogels in China

Cited by 11 publications

References 97 publications

Silica aerogels: from materials research to industrial applications

Silica aerogels: from materials research to industrial applications

Cost-Effective Preparation of Hydrophobic and Thermal-Insulating Silica Aerogels

Optimization of anti-bending deformation of aerogel sandwich thermal protection structure

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