Evaluation of lightweight and flexible insulating aerogel blankets based on Resorcinol-Formaldehyde-Silica for space applications

Berthon‐Fabry, Sandrine; Hildenbrand, Claudia; Ilbizian, Pierre; Jones, Edward; Tavera, Salvatore

doi:10.1016/j.eurpolymj.2017.06.009

Cited by 26 publications

(17 citation statements)

References 29 publications

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“…However, these approaches involve expensive monomers, complicated synthetic processes, and their scale-up productions are yet to be reported. Another strategy is introducing fibers to synthesize silica aerogel blankets (Figure 1A-2), which results in the flexible aerogel blanket that could be bent using polyester and glass fibers as a matrix (Berardi and Zaidi, 2019;Berthon-Fabry et al, 2017;Huang et al, 2019;Talebi et al, 2019;Lakatos, 2019). Though this approach is able to scale-up and commercially available, the interaction between silica aerogel and the fibrous matrix is weak, and the silica aerogel in the blanket can still be cracked and becomes ineffective.…”

Section: Introductionmentioning

confidence: 99%

Robust Silica–Polyimide Aerogel Blanket for Water-Proof and Flame-Retardant Self-Floating Artificial Island

Liu¹,

Wang²,

Liao³

et al. 2021

Front. Mater.

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A robust silica–polyimide (PI) aerogel blanket is designed and synthesized using the PI foam as the matrix and silica aerogel as the filler through an in situ method, where sol–gel transition of silica precursor occurs in pores of the PI foam, followed by the hydrophobization and ambient pressure drying. The density of the aerogel blanket ranges from 0.036 to 0.196 g/cm3, and the low density is directly controlled by tailoring the silica concentration. The specific surface area of the aerogel blanket reaches 728 m2/g. These features of the blanket result in a low thermal conductivity of 0.018 W/mK, which shows a remarkable reduction of 59% compared to that of the PI foam (0.044 W/mK). As a result, a remarkable decrease of 138°C is achieved using the silica blanket as the thermal insulator on a hot plate of approximately 250°C. In addition, the temperature degradation of the blanket is around 500°C, and up to 86% of mass remaining at 900°C is obtained. The blanket is resistant at extremely harsh conditions, e.g., 600°C for 30 min and 1,300°C for 1 min, and no open flame is observed, suggesting a significant flame-retardant of the blanket. Owing to the three-dimensional (3D) porous framework of the PI foam, the silica aerogel is encapsulated in the PI foam and the blanket exhibits strong mechanical property. The silica–PI aerogel can be reversibly compressed for 50 cycles without reduction of strain. The contact angle of the blanket is 153°, which shows a superior waterproof property. Combining with the low density, low thermal conductivity, flame-retardant, and strong mechanical strength, the aerogel blanket has the potential as an artificial island, which is safe (waterproof and flame-retardant), lightweight, comfortable, and easy to be moved.

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Section: Introductionmentioning

confidence: 99%

Robust Silica–Polyimide Aerogel Blanket for Water-Proof and Flame-Retardant Self-Floating Artificial Island

Liu¹,

Wang²,

Liao³

et al. 2021

Front. Mater.

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“…16 Silica aerogel is a highly nano-porous material with low thermal conductivity; it has been widely used in heat storage and transport systems as well as for heat protection of space vehicles. 17,18 Heat protection can be also provided by porous polymers from high internal phase emulsions developed by Silverstein et al 19 Cement-based materials are widely used to protect concrete structures against fire. Portland cement-based mortars with 45% or 10% clinoptilolite substitution have compressive strength exceeding 42.5 MPa after being subjected to 400°C and 500°C.…”

Section: Introductionmentioning

confidence: 99%

“…Silica aerogel is a highly nano-porous material with low thermal conductivity; it has been widely used in heat storage and transport systems as well as for heat protection of space vehicles. 17,18 Heat protection can be also provided by porous polymers from high internal phase emulsions developed by Silverstein et al 19…”

Section: Introductionmentioning

confidence: 99%

Modified xonotlite–type calcium silicate hydrate slabs for fire doors

Levinskas

Lukošiūtė

Baltušnikas

et al. 2018

Journal of Fire Sciences

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Xonotlite-type calcium silicate hydrate slabs were examined under the thermal shock conditions in a solar furnace at the Plataforma Solar de Almeria which can reach a peak of 300 W/cm 2. We have studied the original slabs as well as those modified with a mixture of liquid sodium silicate including montmorillonite as thermal insulation materials for fire doors applications. The slabs were kept at 950°C for 1 h. We performed X-ray diffraction, thermogravimetry and differential scanning calorimetry analysis, scanning electron microscopy, Fourier transform infrared spectroscopy, and thermal conductivity measurements and determined N 2 adsorption/desorption isotherms. X-ray diffraction shows that during the thermal shock at 950°C xonotlite is converted to wollastonite. Specific surface areas of xonotlite slabs decrease due to release of crystalline water molecules. It is possible to maintain temperatures of the back door not exceeding 70°C while the front door is subjected to 950°C for 1-h time periods. The standard requires no more than 140°C at the back door.

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“…Silica aerogels are exceptional porous materials with splendid physical properties such as very low density (0.003-0.5 g/cm 3 ), notably high surface area (500-1200 m 2 /g), and high porosity (80%-99.8%) (1)(2)(3)(4). Due to their outstanding properties aerogels are become a promising candidate in a wide range of applications such as thermal insulation in the construction sector (5), catalysis, chemical sensors (6), drug delivery systems (7), acoustic impedance (8), and space applications (9). They can be produced in various forms (i.e.…”

Section: Introductionmentioning

confidence: 99%

“…Although supercritical drying technique is used to avoid the destruction of the porous structure, it is unable to proceed beyond the small-scale batch type applications as it is both an expensive and risky process due to its high-pressure requirement. Therefore, most of the recent studies mainly focus on producing silica aerogels by ambient pressure drying (5)(6)(7)(8)(9). Generally, during the production of silica aerogels under ambient conditions, gel shrinkage arises from organic solvent evaporation during aging period and pore destruction and the collapse of the network occurs during the drying period.…”

Section: Introductionmentioning

confidence: 99%

EFFECT of IONIC LIQUID CONTENT on MONOLITHIC STRUCTURE of AMINE-MEDIATED SILICA AEROGEL via AMBIENT PRESSURE DRYING

Gi̇zli̇

Çok

Koç

2018

Journal of the Turkish Chemical Society Section A: Chemistry

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In this study, amine-mediated silica aerogels dried under the ambient conditions in monolithic form were prepared by following sol-gel method. 3-aminopropyltriethoxysilane (APTES) was involved in the synthesis as a silica co-precursor. Imidazolium-based short-chain ionic liquids (ILs) were incorporated into the silica gel structure to control the gel shrinkage within the pores, as well as to eliminate the capillary effect during the solvent evaporation. A production procedure was developed to explore the synergistic effect of ionic liquids and amine-functionalized silica precursor on the textural and chemical properties of the final silica gels. Surface modifications of the samples were performed by using 3-Methacryloxypropyltrimethoxysilane (MEMO) to ensure hydrophobic characteristics. To reveal the chemical and morphological characteristics of the resultant material, various analyses were conducted. SEM and FTIR analyses were performed to investigate the morphological and chemical structure, whereas TGA analysis was carried out to determine the thermal stability of the silica gels. As a result, the ionic liquid embedded sample was obtained in a monolithic structure with a low density (0.45 g/cm 3) and had a good thermal stability (up to 381 °C). Contact angle measurement also demonstrated that the desired monolithic sample has a hydrophobic characteristic with a water contact angle value of 113°.

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Evaluation of lightweight and flexible insulating aerogel blankets based on Resorcinol-Formaldehyde-Silica for space applications

Cited by 26 publications

References 29 publications

Robust Silica–Polyimide Aerogel Blanket for Water-Proof and Flame-Retardant Self-Floating Artificial Island

Robust Silica–Polyimide Aerogel Blanket for Water-Proof and Flame-Retardant Self-Floating Artificial Island

Modified xonotlite–type calcium silicate hydrate slabs for fire doors

EFFECT of IONIC LIQUID CONTENT on MONOLITHIC STRUCTURE of AMINE-MEDIATED SILICA AEROGEL via AMBIENT PRESSURE DRYING

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