Ultra-porous flexible PET/Aerogel blanket for sound absorption and thermal insulation

Oh, Kyung Wha; Kim, Duk Ki; Kim, Seong Hun

doi:10.1007/s12221-010-0731-3

Cited by 104 publications

(44 citation statements)

References 15 publications

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“…Porous metals have important technological potential since they offer a unique combination of high conductivity, high surface area, and light weight properties into one material system. They have a wide range of potential applications including thermal management, energy absorption, catalysis, sensing, or filtration at high temperatures, energy generation, and/or storage, lightweight optics, vibration/sound absorption, etc. Despite the significant need for these materials, at present, there are only limited methods to obtain them, such as direct assembly from metal nanoparticles, combustion synthesis, electroplating (or electroless‐plating) on fabricated microtemplates, which are complicated and costly in manufacturing, and some of the processes are toxic and involve safety concerns.…”

Section: The Electrical Conductivities Of Cunw Aerosponges With Diffementioning

confidence: 99%

Porous Cu Nanowire Aerosponges from One‐Step Assembly and their Applications in Heat Dissipation

et al. 2015

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Highly porous metal nanowire aerosponges are produced by direct assembly of the Cu nanowire in situ during their synthesis. Such a method offers not only great simplicity, but also excellent properties such as extremely low densities, high electrical conductivities, and remarkable mechanical properties. Furthermore, these Cu aerosponges exhibit excellent wicking behavior, suggesting their potential for heat-exchange applications in heat pipes.

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Section: The Electrical Conductivities Of Cunw Aerosponges With Diffementioning

confidence: 99%

Porous Cu Nanowire Aerosponges from One‐Step Assembly and their Applications in Heat Dissipation

et al. 2015

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“…[1], [2]. Recently there have been several studies on aerogel applications in the various fields including but not limited to capacitive deionization of water [3]aero capacitor due to high surface area of aerogel [4], [5], and sound absorption in ultrasonic devices [6], [7]. More recently, aerogels have been successfully synthesized in different forms of microspheres [8], thin films [9], and flexible sheets [10], [11] among which thin films have received more interest in applications such as ideal dielectrics for ultrafast integrated circuits [12] and heat insulator in gaseous sensors [13] due to the low thermal conductivity of aerogel.…”

Section: Introductionmentioning

confidence: 99%

Microhotplates for low power, and ultra dense gaseous sensor arrays using recessed silica aerogel for heat insulation

Jalali¹,

Kumar²,

Madani³

et al. 2013

2013 IEEE Sensors Applications Symposium Proceedings

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Abstract-In the operation of air pitted gaseous sensor the microhotplate (µHP) consumes almost all the power used by the sensor. The required area to micromachine the air pit for the µHP of a single sensor is several times more than the actual area required by the sensor itself. The feasibility of implementing low power and ultra dense gaseous sensor array is investigated by developing a new µHP structure using recessed silica aerogel. In comparison with the conventional µHP structure, the recessed aerogel not only has decreased the utilized area of the chip almost ten folds (181 × 181 µm 2 vs. 573 × 573 µm 2 ) to maintain a temperature of 360 • C but also has decreased the power consumed by each µHP more than two folds (1 mW vs. 2.1 mW ). As the number of sensors increases in a sensor array, the saved area of the chip increases quadratic by using the new structure. Moreover, the power consumed by the new designed structure reduces drastically.

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“…The aerogel pieces were not uniformly scattered in the VR25 and VR32 implant samples; therefore, the measurements for these samples were conducted at different orientations to determine the error caused by the spatial distribution within the RTV 655. The VR52 implant sample had an average measured thermal conductivity which was significantly lower than the other implant samples at 0.0982 ± 0.0041 W/m-K. 8 American Institute of Aeronautics and Astronautics Thermal conductivities for each sample were measured at -198.5 °C and are shown in Table 3 and Figure 9. The mean values were approximately half of the room temperature values for all of the samples with similar data trends.…”

Section: Resultsmentioning

confidence: 99%

“…Previous designs for insulating cryogenic tanks featured non cross-linked silica aerogels imbedded in a "blanket" that was wrapped around a metal tank [7] , however native aerogels have a very low tensile strength. It has been shown that the mechanical properties of native aerogels are greatly improved by cross-linking silica aerogel chains with polyurea or vanadium [8] . For this study, combinations of cross-linked silica aerogel and RTV 655 are considered because it has been shown that RTV has good thermal and electrical resistance, high temperature performance, easy fabrication, and chemical resistance [9] .…”

Section: Introductionmentioning

confidence: 99%

Thermal Characterization of Cross-linked Silica Aerogel-RTV655 for Cryogenic Propellant Tanks

Sabri

Marchetta

Smith

2012

50th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition

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Thermal conductivities for different volume ratios of cross-linked silica aerogel to RTV 655 were experimentally determined. Silica aerogel is an ideal insulator with a make up of 99% air. Cross-linked silica aerogel is a much stronger material while retaining the thermal properties of silica aerogel. RTV 655 can be shaped into any geometry and is stable under extreme temperature conditions. RTV 655 is a space qualified thermal insulator and the compound of aerogel-RTV 655 is being considered for use as a cryogenic propellant tank material for long duration space missions. Current cryogenic tanks, which are constructed using metals, experience self-pressurization due to incident solar radiation and extreme temperature changes. The heat transfer to the tank results in propellant vaporization. The compound cross-linked silica aerogel with RTV 655 is a new alternative for cryogenic tank constructions and may provide a means of significantly reducing the tank self pressurization rates. Several samples were made to test thermal properties of different volume ratios in an effort to assess the thermal conductivity of the combination of cross-linked silica aerogel and RTV 655. Thermal conductivity results are presented comparing a homogeneous compound consisting of micro scale aerogel particles embedded in RTV655 and a monolithic aerogel slab embedded in RTV 655. NomenclatureSymbols and Units k thermal conductivity, W/(m⋅K) α thermal diffusivity, m 2 /sec t time, sec ρ density of the material tested, g/cm 3 m mass of the material tested, gm V volume of the material tested, cm 3 VR volume ratio of cross linked silica aerogel-RTV 655Subscripts rtv room temperature vulcanized silicone 655 aerogel cross-lined silica aerogel

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Ultra-porous flexible PET/Aerogel blanket for sound absorption and thermal insulation

Cited by 104 publications

References 15 publications

Porous Cu Nanowire Aerosponges from One‐Step Assembly and their Applications in Heat Dissipation

Porous Cu Nanowire Aerosponges from One‐Step Assembly and their Applications in Heat Dissipation

Microhotplates for low power, and ultra dense gaseous sensor arrays using recessed silica aerogel for heat insulation

Thermal Characterization of Cross-linked Silica Aerogel-RTV655 for Cryogenic Propellant Tanks

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