The mechanical and thermal insulating properties of resin-derived carbon foams reinforced by K2Ti6O13 whiskers

Luo, Ruiying; Ni, Yongfeng; Li, Jinsong; Yang, Caili; Wang, Shaobo

doi:10.1016/j.msea.2010.10.106

Cited by 52 publications

(26 citation statements)

References 13 publications

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“…Furthermore, other researchers reported the improvement of properties of carbon foams via reinforcement of mesocarbon microbeads, pitch fluoride, zirconium, K 2 Ti 6 O 13 whiskers, aluminosilicate, etc. [12][13][14][15][16]. Nevertheless, those investigations show either improves one property at the cost of another property's reduction, or strengthens the properties moderately.…”

Section: Introductionmentioning

confidence: 99%

“…SEM images of carbon foams with different m-MWCNTs additive amount a 0 wt%; b 1 wt%; c 2 wt%; d 3 wt%; e 4 wt%; f magnification image showing the presence of m-MWCNTs in carbon foam with 4 wt% m-MWCNTs meanwhile the emergence of plateau is related to the crushing-densification process caused by the collapse of cell structure[15,26]. The ultimate compressive strength is 5.95, 7.57, 8.22, 10.92, and 11.72 MPa, when the additive amount of m-MWCNTs is 0, 1, 2, 3, and 4 wt%, respectively.…”

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confidence: 99%

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Effect of multi-walled carbon nanotube additive on the microstructure and properties of pitch-derived carbon foams

Liu

Huang

et al. 2015

J Mater Sci

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The multi-wall carbon nanotube-reinforced carbon foams were prepared via foaming, carbonization, and graphitization process using pretreatment pitches as matrix precursor and modified multi-wall carbon nanotube as additive. The effects of modified multi-wall carbon nanotube additive amount on the microstructure, mechanical strength, thermal conductivity, and electrical conductivity of carbon foams were investigated by X-ray diffraction, scanning electronic microscopy, universal testing machine, laser thermal conductivity tester, and fourprobe resistance meter, respectively. It was found that the introduction of modified multi-wall carbon nanotube had a significant effect on the microstructure of carbon foams. The compressive strength and electrical conductivity of carbon foams increased with the increase of modified multiwall carbon nanotube additive amount, the maximum were 11.72 MPa and 28.89 9 10 3 S/m, respectively. However, the thermal conductivity of carbon foams increased firstly with increasing modified multi-wall carbon nanotube additive amount up to 2 wt%, and then decreased.

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%

Effect of multi-walled carbon nanotube additive on the microstructure and properties of pitch-derived carbon foams

Liu

Huang

et al. 2015

J Mater Sci

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“…However, the thermal insulation property of these carbon foams is very poor (Ref 12,13). Recently, composites for improving the thermal insulation property of carbon foams have been under extensive investigations (Ref [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Thermal Insulation Composite Prepared from Carbon Foam and Silica Aerogel Under Ambient Pressure

Liu

Shi

et al. 2015

J. of Materi Eng and Perform

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Carbon foam/silica aerogel composite as a promising thermal insulation material was prepared under ambient pressure successfully in the present work. Carbon foam was prepared by pretreatment, foaming, and carbonization process, while silica aerogel was synthesized by sol-gel method. The microstructure, morphology characteristics, compression strength, and thermal properties of composite were characterized by infrared spectroscopy, x-ray diffraction, scanning electron microscope, universal testing machine, and laser flash thermal detector, respectively. Results showed that silica aerogel was successfully synthesized in the surface foam cells of carbon foam due to the closed cell structure of carbon foam. Moreover, the compressive strength of the carbon foam was not affected by the silica aerogel in the cell structure of carbon foam, while its thermal insulation property at room temperature was improved.

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“…However, the compressive strength of carbon foams prepared from sucrose is relatively low due to the low carbon yield [19,20,22,24]. Reinforcement such as carbon fiber, carbon nanofiber, carbon microspheres, multi-walled carbon nanotube, ceramic whiskers, etc., is used to increase the compressive strength of carbon foams prepared from fossilbased precursors [26][27][28][29][30][31][32][33][34]. Reinforcing carbon additives such as activated carbon powder and milled carbon fiber are studied to improve the compressive strength of carbon foams from sucrose [21,[35][36][37].…”

Section: Introductionmentioning

confidence: 99%

Graphene-reinforced carbon composite foams with improved strength and EMI shielding from sucrose and graphene oxide

2015

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Graphene-reinforced carbon composite foams were prepared by thermo-foaming of graphene oxide (GO) dispersions in molten sucrose to form solid organic foams followed by carbonization at 900°C. The hydrogen bonding interactions between sucrose hydroxyls and functional groups on GO decreased the melting point of sucrose from 185 to 120°C when the GO concentration increased from 0 to 1.25 wt%. The viscosity of GO dispersions in molten sucrose increased gradually with an increase in GO concentration up to 0.75 wt% and then rapidly up to 1.25 wt%. The foaming time and foam setting time decreased drastically from 6 to 1 h and 34 to 9 h, respectively, when the GO concentration increased from 0.15 to 1.25 wt% due to the catalytic effect of GO toward -OH to -OH condensation. The density and cell size of the carbon composite foams depended on the GO concentration. A maximum compressive strength and specific compressive strength of 5.2 MPa and 21.3 MPa g -1 cm -3 , respectively, achieved at a very low GO concentration of 0.25 wt% corresponded to an increase of 189 and 133 %. The electrical conductivity and EMI shielding effectiveness (SE) of the graphene-reinforced carbon composite foams increased with an increase in the GO concentration up to 0.15 wt% and then decreased. The decrease was due to a decrease in foam density and GO agglomeration at higher GO concentrations. The maximum SE and specific SE of 38.6 dB and 160 dB g -1 cm -3 were achieved at GO concentrations of 0.15 and 1 wt%, respectively.

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The mechanical and thermal insulating properties of resin-derived carbon foams reinforced by K2Ti6O13 whiskers

Cited by 52 publications

References 13 publications

Effect of multi-walled carbon nanotube additive on the microstructure and properties of pitch-derived carbon foams

Effect of multi-walled carbon nanotube additive on the microstructure and properties of pitch-derived carbon foams

Thermal Insulation Composite Prepared from Carbon Foam and Silica Aerogel Under Ambient Pressure

Graphene-reinforced carbon composite foams with improved strength and EMI shielding from sucrose and graphene oxide

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