Ultralight Pyrolytic Carbon Foam Reinforced with Amorphous Carbon Nanotubes for Broadband Electromagnetic Absorption

2021 ◽  
Author(s):  
Luo Kong ◽  
Sihan Luo ◽  
Shuyu Zhang ◽  
Hailong Xu ◽  
Xiaoyan Yuan ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Amorphous Carbon ◽  
Pyrolytic Carbon ◽  
Carbon Foam ◽  
Electromagnetic Absorption

Effect Mechanisms of Carbon Nanotubes on the Supercritical Foaming Behaviors and Mechanical Performance of Carbon Foam

2011 ◽  
Vol 26 (10) ◽  
pp. 1020-1024
Author(s):  
Ying BAO ◽  
Chun-Xiao WANG ◽  
Liang ZHAN ◽  
Yan-Li WANG ◽  
Guang-Zhi YANG ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Mechanical Performance ◽  
Carbon Foam ◽  
Supercritical Foaming

scholarly journals A Unique Strategy for Polyethylene Glycol/Hybrid Carbon Foam Phase Change Materials: Morphologies, Thermal Properties, and Energy Storage Behavior

Materials ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 2011 ◽  
Author(s):  
Xiaolong Su ◽  
Shikui Jia ◽  
Guowei Lv ◽  
Demei Yu
Keyword(s):  
Carbon Nanotubes ◽  
Polyethylene Glycol ◽  
Energy Storage ◽  
Phase Change ◽  
Thermal Energy ◽  
Phase Change Materials ◽  
Carbon Foam ◽  
Chemical Structures ◽  
Walled Carbon Nanotubes ◽  
Hybrid Carbon

Polyethylene glycol (PEG)/hybrid carbon foam (CF) phase change materials (PCMs) were prepared by integrating PEG into CF via dynamic-vacuum impregnation. The hybrid CF was first synthesized by mixtures of graphene oxide (GO) and carbon nanotubes (CNTs) with different volume ratios. The morphologies, chemical structures, thermal conductivities, shape-stabilization levels, and photo-thermal energy conversion levels of these composite PCMs were characterized systematically. The prepared composite PCMs exhibited good shape-stabilization levels and showed their original shapes without any PEG leakage. It was found that the polyethylene glycol/carbon foam with multi-walled carbon nanotubes (PEG/MCF) composite PCMs had a better shape-stable performance below the temperature of 250 °C, and the thermal conductivity of the PEG/MCF composite PCMs reached as high as 1.535 W/(mK), which was obviously higher than that of polyethylene glycol/carbon foam with single-walled carbon nanotubes (PEG/SCF, 1.159 W/(mK)). The results of the photo-thermal simulation tests showed that the composite PCMs had the ability to absorb light energy and then convert it to thermal energy, and the maximum thermal energy storage efficiency of the PEG/MCF composite PCMs and the PEG/SCF composite PCMs was 92.1% and 90.6%, respectively. It was considered that a valuable technique to produce high-performance composite PCMs was developed.

Opposite effects of self-growth amorphous carbon and carbon nanotubes on the reforming of toluene with Ni/α-Al 2 O 3 for hydrogen production

2017 ◽  
Vol 42 (21) ◽  
pp. 14439-14448 ◽  
Author(s):  
Limo He ◽  
Song Hu ◽  
Long Jiang ◽  
Syed Shatir A. Syed-Hassan ◽  
Yi Wang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Hydrogen Production ◽  
Amorphous Carbon

Preferential Growth of Carbon Nanotubes/Nanofibers Using Lithographically Patterned Catalysts

2001 ◽  
Vol 675 ◽  
Author(s):  
K. B. K. Teo ◽  
M. Chhowalla ◽  
G. A. J. Amaratunga ◽  
W. I. Milne ◽  
G. Pirio ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Amorphous Carbon ◽  
Deposition Process ◽  
High Yield ◽  
Full Potential ◽  
Carbon Nanofibres ◽  
Preferential Growth ◽  
Plasma Decomposition

ABSTRACTIn order to utilise the full potential of carbon nanotubes/nanofibers, it is necessary to be able to synthesize well aligned nanotubes/nanofibres at desired locations on a substrate. This paper examines the preferential growth of aligned carbon nanofibres by PECVD using lithographically patterned catalysts. In the PECVD deposition process, amorphous carbon is deposited together with the nanotubes due to the plasma decomposition of the carbon feed gas, in this case, acetylene. The challenge is to uniformly nucleate nanotubes and reduce the unwanted amorphous carbon on both the patterned and unpatterned areas. An etching gas (ammonia) is thus also incorporated into the PECVD process and by appropriately balancing the acetylene to ammonia ratio, conditions are obtained where no unwanted amorphous carbon is deposited. In this paper, we demonstrate high yield, uniform, ‘clean’ and preferential growth of vertically aligned nanotubes using PECVD.

Low temperature growth of carbon nanotubes on tetrahedral amorphous carbon using Fe–Cu catalyst

Carbon ◽  
2015 ◽  
Vol 81 ◽  
pp. 639-649 ◽  
Author(s):  
R. Cartwright ◽  
S. Esconjauregui ◽  
D. Hardeman ◽  
S. Bhardwaj ◽  
R. Weatherup ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Low Temperature ◽  
Amorphous Carbon ◽  
Temperature Growth ◽  
Low Temperature Growth ◽  
Tetrahedral Amorphous Carbon ◽  
Cu Catalyst

Spontaneous formation of carbon nanotubes and polyhedra from cesium and amorphous carbon

1998 ◽  
Vol 292 (3) ◽  
pp. 352-356 ◽  
Author(s):  
Mark G. Stevens ◽  
Shekhar Subramoney ◽  
Henry C. Foley
Keyword(s):  
Carbon Nanotubes ◽  
Amorphous Carbon ◽  
Spontaneous Formation
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