Silica aerogel/polyester blankets for efficient sound absorption in buildings

Talebi, Zahra; Soltani, Parham; Habibi, Negar; Latifi, Fatemeh

doi:10.1016/j.conbuildmat.2019.06.031

Cited by 71 publications

(33 citation statements)

References 42 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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“…The silica aerogel can undergo a surface modification process (typically hydrophobization) to enhance surface life stability [4], thus reducing the aerogel's susceptibility to moisture and rapid spoilage [5]. Silica aerogels themselves have porosity values as high as 98%, densities as low as 0.05-0.5 g/cm 3 , surface areas in the range of 300-1000 m 2 /g [6] and thermal conductivity values as low as 0.02 W/mK [7]. Application of aerogels on their own are limited due to their fragility and low mechanical modulus.…”

Section: Introductionmentioning

confidence: 99%

Acoustical Properties of Fiberglass Blankets Impregnated with Silica Aerogel

Begum

Horoshenkov

2021

Applied Sciences

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It is known that aerogel impregnated fibrous blankets offer high acoustic absorption and thermal insulation performance. These materials are becoming very popular in various industrial and building applications. Although the reasons for the high thermal insulation performance of these materials are well understood, it is still largely unclear what controls their acoustic performance. Additionally, only a small number of publications to date report on the acoustical properties of fibrous blankets impregnated with powder aerogels. There is a lack of studies that attempt to explain the measured absorption properties with a valid mathematical model. This paper contributes to this knowledge gap through a simulation that predicts the measured complex acoustic reflection coefficient of aerogel blankets with different filling ratios. It is shown that the acoustic performance of a fibrous blanket impregnated with aerogel is generally controlled by the effective pore size and porosity of the composite structure. It is shown that there is a need for refinement of a classical Biot-type model to take into account the sorption and pressure diffusion effects, which become important with the increased filling ratio.

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“…[ 137 ] After surface modification by TMCS, most commercial aerogel blankets have a hydrophobic surface. As shown in Figure 12C, [ 110 ] a silica aerogel/polyester aerogel blanket clearly exhibits high hydrophobicity with a contact angle of 145°, due to the formation of hydrophilic Si–O–CH 3 groups. The typical FESEM images of fracture surface of the ATW aerogel blanket after tensile and tear tests are shown in Figures 12D and 12E, respectively.…”

Section: Porous Structure and Mechanical Propertiesmentioning

confidence: 99%

“…(B) The microstructure of a commercial aerogel blanket (TW800, Cabot, Germany) (reprinted with permission [ 137 ] ; copyright © 2018, ASM International). (C) Contact angle image showing hydrophobic surface of a silica aerogel/polyester aerogel blanket (reprinted with permission [ 110 ] ; copyright © 2019 Elsevier Ltd.) and the typical FESEM images of fracture surface of a commercial aerogel blanket (TW800, Cabot, Germany) after (D) tensile and (E) tear tests (reprinted with permission [ 137 ] ; copyright © 2018, ASM International)…”

Section: Porous Structure and Mechanical Propertiesmentioning

confidence: 99%

Recent advances in novel aerogels through the hybrid aggregation of inorganic nanomaterials and polymeric fibers for thermal insulation

et al. 2021

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Aerogel is a nanoporous solid material with ultrahigh porosity, ultralow density, and thermal conductivity, which is considered to be one of the most promising high‐performance insulation materials today. However, traditional pure inorganic aerogels (i.e., silica aerogel) exhibit inherent structural brittleness, making their processing and handling difficult, and their manufacturing costs are relatively high, which limits their large‐scale practical use. The recently developed aerogel based on polymer nanofibers has ultralow thermal conductivity and density, excellent elasticity, and designable multifunction. More importantly, one‐dimensional polymer nanofibers are directly used as building blocks to construct the network of aerogels via a gelation‐free process. This greatly simplifies the aerogel preparation process, thereby bringing opportunities for large‐scale aerogel applications. The aggregation of inorganic nanomaterials and polymer nanofibers is considered to be a very attractive strategy for obtaining highly flexible, easily available, and multifunctional composite aerogels. Therefore, this review summarizes the recent advances in novel aerogels through the hybrid aggregation of inorganic nanomaterials and polymeric fibers for thermal insulation. The main processing routes, porous microstructure, mechanical properties, and thermal properties and applications of these aerogels are highlighted. In addition, various future challenges faced by these aerogels in thermal insulation applications are discussed in this review.

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Silica aerogel/polyester blankets for efficient sound absorption in buildings

Cited by 71 publications

References 42 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

Acoustical Properties of Fiberglass Blankets Impregnated with Silica Aerogel

Recent advances in novel aerogels through the hybrid aggregation of inorganic nanomaterials and polymeric fibers for thermal insulation

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