Preparation of macroporous carbon foams using a polyurethane foam template replica method without curing step

Nam, Gimin; Choi, Sung Hyuk; Byun, Haebong; Rhym, Young-Mok; Shim, Sang Eun

doi:10.1007/s13233-013-1114-6

Cited by 44 publications

(23 citation statements)

References 21 publications

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“…The compressive strength values are significantly higher as compared to those of other carbon foams (e.g. Commercial ''Ultramet'' carbon foam (0.16-0.76 MPa) and commercial ''ERG'' carbon foam (0.10-0.52 MPa)) reported in the literature [50][51][52]. The compressive strength of erythritol impregnated graphite composite foam exhibited 5 times higher than that of graphite foam.…”

Section: Chemical Compatibilitymentioning

confidence: 75%

Preparation of erythritol–graphite foam phase change composite with enhanced thermal conductivity for thermal energy storage applications

Karthik

Faïk

Blanco-Rodríguez

et al. 2015

Carbon

163

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Section: Chemical Compatibilitymentioning

confidence: 75%

Preparation of erythritol–graphite foam phase change composite with enhanced thermal conductivity for thermal energy storage applications

Karthik

Faïk

Blanco-Rodríguez

et al. 2015

Carbon

163

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“…Ceramic foams have been prepared using several methods such as direct foaming [2][3][4][5][6][7], sacrificial template or fugitives [8][9][10][11][12], replica methods [1,[13][14][15][16] and partial sintering [17,18]. Ceramic foam derived using the abovementioned methods is chemo-thermo-mechanically suitable for further processing.…”

Section: Introductionmentioning

confidence: 99%

Titania-Coated Alumina Foam Photocatalyst for Memantine Degradation Derived by Replica Method and Sol-Gel Reaction

et al. 2020

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In the present work, alumina (Al2O3) foam was prepared by the replica method where a polyurethane (PU) foam (30 pores per inch (ppi)) template was impregnated with a 60 wt.% Al2O3 suspension. Sintered Al2O3 foam was used as substrate for the deposition of sol-gel derived titania (TiO2) film using dip coating. For the preparation of TiO2 sol, titanium(IV) isopropoxide (Ti-iPrOH) was used as the precursor. The common problem of qualification and quantification of a crystalline coating on a highly porous 3D substrate with an uneven surface was addressed using a combination of different structural characterization methods. Using Powder X-ray Diffraction (PXRD) and synchrotron Grazing Incidence X-ray Diffraction (GIXRD) on bulk and powdered Al2O3 foam and TiO2-coated Al2O3 foam samples, it was determined Al2O3 foam crystallizes to corundum and coating to anatase, which was also confirmed by Fourier Transformed Infrared Spectroscopy (FTIR). Scanning Electron Microscopy with Energy Dispersive X-ray Spectroscopy (SEM/EDS) revealed the structural and microstructural properties of the substrate and coating. Differential Thermal Analysis (DTA) and Thermogravimetric Analysis (TGA) were used to clarify the evolution of the porous microstructure. The Al2O3-TiO2 composite was evaluated as a photocatalyst candidate for the degradation of the micropollutant medication memantine. The degradation rate was monitored using a light-emitting diode (LED) lamp operating at electromagnetic (EM) wavelength of 365 nm. The photocatalytic activity of sol-gel-derived TiO2 film immobilized on the Al2O3 foam was compared with commercially available TiO2 nanoparticles, P25-Degussa, in the form of a suspension. The levels of memantine were monitored by High-Performance Liquid Chromatography–Tandem Mass Spectrometry (HPLC–MS/MS). The efficiency and rate of the memantine photodegradation by suspended TiO2 nanoparticles is higher than the TiO2-coated Al2O3 foam. But, from the practical point of view, TiO2-coated Al2O3 foam is more appropriate as a valuable photocatalytic composite material.

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“…However, it is difficult to produce carbonaceous foams/sponges in a large scale because of their relatively high‐cost and harsh processing conditions (high‐temperature carbonization: ≈800–1000 °C)] . Furthermore, because of the high resistance of carbon‐based materials, for example, 0.34 S cm −1 carbonized polyurethane foam (0.34 S cm −1 ), reduced graphene oxide coated on polyurethane foam (0.0009–0.0025 S cm −1 ), and carbon nanotube coated on polyurethane (1 S cm −1 ), these supercapacitor sponges face issues in high internal resistance . Their performance in terms of electrical conductivity remains inferior to that of metal foams, which results in a reduced power density.…”

Section: Introductionmentioning

confidence: 99%

3D Highly Conductive Silver Nanowire@PEDOT:PSS Composite Sponges for Flexible Conductors and Their All‐Solid‐State Supercapacitor Applications

Moon

Yoon

2017

Adv Materials Inter

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of both electrolyte penetration and electron transportation for next-generation power devices. Currently, the most commonly used 3D porous metal foam in electrodes is nickel as a current collector, which has a high conductivity (≈350 S cm −1 ). [4] However, this metal foam is not appropriate for flexible supercapacitors and electronics because they cannot return to their initial shape after even slight strains such as uniaxial compression, bending, and twisting. To resolve the challenges of flexibility, the unique functionalization of commercial sponges (e.g., polyurethane or melamine sponges) with 3D open-cell structure analogue metal foams as a template has attracted intensive research interest for solving energy and environmental issues because of the low cost, ease of fabrication, 3D porous structures, light weight, and high flexibility. Thus, plastic sponges have drawn significant attention as a support and/or template to construct 3D active materials. However, these polymer foams are electrical insulators. Consequently, tremendous efforts have been devoted to synthesize 3D network conductors on commercial sponges by simply dipcoating (reduced) graphene oxides and/or carbon-nanotube dispersion and/or pyrolized carbon sponges. [5][6][7][8][9][10][11][12][13][14] However, it is difficult to produce carbonaceous foams/sponges in a large scale because of their relatively high-cost and harsh processing conditions (high-temperature carbonization: ≈800-1000 °C)]. [15] Furthermore, because of the high resistance of carbon-based materials, for example, 0.34 S cm −1 carbonized polyurethane foam (0.34 S cm −1 ), [16] reduced graphene oxide coated on polyurethane foam (0.0009-0.0025 S cm −1 ), [17] and carbon nanotube coated on polyurethane (1 S cm −1 ), [18] these supercapacitor sponges face issues in high internal resistance. [19,20] Their performance in terms of electrical conductivity remains inferior to that of metal foams, which results in a reduced power density. Lately, the ramifications of 3D networks with high conductivity as substrate templates have been a notably fascinating topic for energy and/or sensing from both scientific and technological viewpoints. [7,8,[21][22][23][24][25][26][27][28][29][30] Therefore, there is an urgent need for a new class of flexible 3D open-porous substrates to develop advanced energy-related storages with enhanced energy density without sacrificing the power delivery and cycle stability to satisfy the future flexible energy-related demands. Nonetheless, Although increasing attention has been paid to wearable electronic devices in recent years, flexible supercapacitors with high performance remain not readily available because of the limitations of flexible electrode types. A highly conductive 3D macroporous sponge is fabricated by coating poly(3,4-ethyl enedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS)/silver nanowires (AgNWs) on a commercial sponge using a simple and low-cost "immersion method." The fabricated flexible 3D sponge conductor shows a high electrical conductiv...

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Preparation of macroporous carbon foams using a polyurethane foam template replica method without curing step

Cited by 44 publications

References 21 publications

Preparation of erythritol–graphite foam phase change composite with enhanced thermal conductivity for thermal energy storage applications

Preparation of erythritol–graphite foam phase change composite with enhanced thermal conductivity for thermal energy storage applications

Titania-Coated Alumina Foam Photocatalyst for Memantine Degradation Derived by Replica Method and Sol-Gel Reaction

3D Highly Conductive Silver Nanowire@PEDOT:PSS Composite Sponges for Flexible Conductors and Their All‐Solid‐State Supercapacitor Applications

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