A review of silicon-based aerogel thermal insulation materials: Performance optimization through composition and microstructure

Li, Chengdong; Chen, Zhaofeng; Dong, Weifu; Lin, Liangliang; Zhu, Xiangmiao; Liu, Qingsong; Zhang, Yue; Zhai, Ni; Zhou, Zihao; Wang, Yuhang; Chen, Baoming; Ji, Yuexin; Chen, Xianqi; Xu, Xuechun; Yang, Yifan; Zhang, Heteng

doi:10.1016/j.jnoncrysol.2020.120517

Cited by 76 publications

(41 citation statements)

References 140 publications

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“…Although there exist several types of aerogels, the most explored are the silica-based ones. Silica aerogels are highly mesoporous materials (>80% of porosity) with ultralow density, having huge internal surface areas (typically from 250 to 800 m 2 g −1 and can exceed 1000 m 2 g −1 ) [ 4 ], high visible transparency [ 5 ], and extremely low thermal conductivities (10–30 mW/(m·K)) [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

Silica-Based Aerogel Composites Reinforced with Reticulated Polyurethane Foams: Thermal and Mechanical Properties

Merillas

Lamy-Mendes

Villafañe

et al. 2022

Gels

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In this work, silica aerogel composites reinforced with reticulated polyurethane (PU) foams have been manufactured having densities in the range from 117 to 266 kg/m3 and porosities between 85.7 and 92.3%. Two different drying processes were employed (ambient pressure drying and supercritical drying) and a surface modification step was applied to some of the silica formulations. These composites, together with the reference PU foam and the monolithic silica aerogels, were fully characterized in terms of their textural properties, mechanical properties and thermal conductivities. The surface modification with hexamethyldisilazane (HMDZ) proved to improve the cohesion between the reticulated foam and the silica aerogels, giving rise to a continuous network of aerogel reinforced by a polyurethane porous structure. The samples dried under supercritical conditions showed the best interaction between matrixes as well as mechanical and insulating properties. These samples present better mechanical properties than the monolithic aerogels having a higher elastic modulus (from 130 to 450 kPa), a really exceptional flexibility and resilience, and the capacity of being deformed without breaking. Moreover, these silica aerogel-polyurethane foam (Sil-PU) composites showed an excellent insulating capacity, reaching thermal conductivities as low as 14 mW/(m·K).

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Section: Introductionmentioning

confidence: 99%

Silica-Based Aerogel Composites Reinforced with Reticulated Polyurethane Foams: Thermal and Mechanical Properties

Merillas

Lamy-Mendes

Villafañe

et al. 2022

Gels

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Section: Aerogel Processing Methodsmentioning

confidence: 99%

Recent Developments in Nanocellulose-Based Aerogels in Thermal Applications: A Review

et al. 2021

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Naturally derived nanocellulose (NC) is a renewable, biodegradable nanomaterial with high strength, low density, high surface area, and tunable surface chemistry, which allows its interaction with other polymers and nanomaterials in a controlled manner. In recent years, NC aerogel has gathered a lot of attention due to environmental concerns. This review presents recent developments of NC-based aerogels and their controlled interactions with other polymers and nanomaterials for thermal applications that include electronic devices, the apparel industry, superinsulating materials, and flame-retardant smart building materials. After going through the distinctive properties of NC aerogels, they are orderly categorized and discussed as thermally insulated, thermally conductive, and flame-retardant materials.

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“…Therefore, in temporary residential buildings that accommodate COVID-19 patients, there is a need to provide heat alternatives that provide energy efficiency and thermal comfort. Research on high-efficiency air conditioners continues [ [13] , [14] , [15] ]; research on insulation technology that can suppress heat inflow into a room is also being conducted [ [16] , [17] , [18] , [19] ]. Among them, studies on energy reduction using PCMs have been ongoing.…”

Section: Introductionmentioning

confidence: 99%

Practical solutions with PCM for providing thermal stability of temporary house, school and hospital in disaster situations

Yun

Kang

Kim

et al. 2022

Building and Environment

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A review of silicon-based aerogel thermal insulation materials: Performance optimization through composition and microstructure

Cited by 76 publications

References 140 publications

Silica-Based Aerogel Composites Reinforced with Reticulated Polyurethane Foams: Thermal and Mechanical Properties

Silica-Based Aerogel Composites Reinforced with Reticulated Polyurethane Foams: Thermal and Mechanical Properties

Recent Developments in Nanocellulose-Based Aerogels in Thermal Applications: A Review

Practical solutions with PCM for providing thermal stability of temporary house, school and hospital in disaster situations

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