Carbon foam derived from various precursors

Chen, Chong; Kennel, Elliot B.; Stiller, Alfred H.; Stansberry, Peter G.; Zondlo, John W.

doi:10.1016/j.carbon.2005.12.021

Cited by 284 publications

(108 citation statements)

References 10 publications

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“…The compressive strength of foam increased with the increase of bulk density. Lower compressive strengths are related to lower cross-linking in polymer, larger cell size, hence, weak cell walls [2,24]. These values are well matched with the compressive strengths of the traditional phenolic foams (0.14-0.62 MPa).…”

Section: Bulk Density and Compressive Strength Testmentioning

confidence: 76%

Liquefaction of oak tree bark with different biomass/phenol mass ratios and utilizing bio-based polyols for carbon foam production

Özbay¹,

Yargıç²

2017

AIP Conference Proceedings

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Section: Bulk Density and Compressive Strength Testmentioning

confidence: 76%

Liquefaction of oak tree bark with different biomass/phenol mass ratios and utilizing bio-based polyols for carbon foam production

Özbay¹,

Yargıç²

2017

AIP Conference Proceedings

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“…For example, they share the properties of other macroscale objects composed of nanoscale carbon, such as electrical conductivity [16,17] and thermal stability up to at least 500 degrees in air atmosphere [14]. Applications under study for such materials include shock absorbing for use in personal protection systems, oil absorbents for environmental remediation, lightweight structural composites, catalyst supports, thermal management, and electrodes for energy storage systems, among others [18][19][20][21][22][23][24][25]. One potential application is the use of CNFF, as the sensing element in strain gauges, has already been demonstrated [14].…”

Section: Introductionmentioning

confidence: 99%

Scaling up the Fabrication of Mechanically-Robust Carbon Nanofiber Foams

Arias‐Monje

Dominguez

Phillips

et al. 2016

Fibers

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Abstract:This work aimed to identify and address the main challenges associated with fabricating large samples of carbon foams composed of interwoven networks of carbon nanofibers. Solutions to two difficulties related with the process of fabricating carbon foams, maximum foam size and catalyst cost, were developed. First, a simple physical method was invented to scale-up the constrained formation of fibrous nanostructures process (CoFFiN) to fabricate relatively large foams. Specifically, a gas deflector system capable of maintaining conditions supportive of carbon nanofiber foam growth throughout a relatively large mold was developed. ANSYS CFX models were used to simulate the gas flow paths with and without deflectors; the data generated proved to be a very useful tool for the deflector design. Second, a simple method for selectively leaching the Pd catalyst material trapped in the foam during growth was successfully tested. Multiple techniques, including scanning electron microscopy, surface area measurements, and mechanical testing, were employed to characterize the foams generated in this study. All results confirmed that the larger foam samples preserve the basic characteristics: their interwoven nanofiber microstructure forms a low-density tridimensional solid with viscoelastic behavior. Fiber growth mechanisms are also discussed. Larger samples of mechanically-robust carbon nanofiber foams will enable the use of these materials as strain sensors, shock absorbers, selective absorbents for environmental remediation and electrodes for energy storage devices, among other applications.

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“…Initially, CFoam was prepared from thermosetting polymeric material by heat treatment under controlled atmosphere (Cowlard and Lewis 1967). Later on, coal tar and petroleum pitches were used for the development of CFoam (Chen et al 2006). To make highly crystalline CFoam of high electrical and thermal conductivity, generally mesophase pitch is used as the starting material (Klett et al 2000(Klett et al , 2004 and it is prepared by high temperature and pressure foaming process.…”

Section: Introductionmentioning

confidence: 99%

Nanostructuring effect of multi-walled carbon nanotubes on electrochemical properties of carbon foam as constructive electrode for lead acid battery

et al. 2014

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In the present study, nanostructuring effect of multi-walled carbon nanotubes (MWCNTs) on electrochemical properties of coal tar pitch (CTP) based carbon foam (CFoam) was investigated. The different weight fractions of MWCNTs were mixed with CTP and foam was developed from the mixture of CTP and MWCNTs by sacrificial template technique and heat treated at 1,400 and 2,500°C in inert atmosphere. These foams were characterized by scanning electron microscopy, X-ray diffraction, and potentiostat PARSTAT for cyclic voltammetry. It was observed that, bulk density of CFoam increases with increasing MWCNTs content and decreases after certain amount. The MWCNTs influence the morphology of CFoam and increase the width of ligaments as well as surface area. During the heat treatment, stresses exerting at MWCNTs/ carbon interface accelerate ordering of the graphene layer which have positive effect on the electrochemical properties of CFoam. The current density increases from 475 to 675 mA/cm 2 of 1,400°C heat treated and 95 to 210 mA/cm 2 of 2,500°C heat-treated CFoam with 1 wt% MWCNTs. The specific capacitance was decreases with increasing the scan rate from 100 to 1,000 mV/s. In case of 1 % MWCNTs content CFoam the specific capacitance at the scan rate 100 mV/s was increased from 850 to 1,250 lF/cm 2 and 48 to 340 lF/cm 2 of CFoam heat treated at 1,400°C and 2,500°C respectively. Thus, the higher value surface area and current density of MWCNTs-incorporated CFoam heat treated to 1,400°C can be suitable for lead acid battery electrode with improved charging capability.

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Carbon foam derived from various precursors

Cited by 284 publications

References 10 publications

Liquefaction of oak tree bark with different biomass/phenol mass ratios and utilizing bio-based polyols for carbon foam production

Liquefaction of oak tree bark with different biomass/phenol mass ratios and utilizing bio-based polyols for carbon foam production

Scaling up the Fabrication of Mechanically-Robust Carbon Nanofiber Foams

Nanostructuring effect of multi-walled carbon nanotubes on electrochemical properties of carbon foam as constructive electrode for lead acid battery

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