scholarly journals Effect of Ultrasonication Time on Microstructure, Thermal Conductivity, And Viscosity of Ionanofluids with Originally Ultra-Long Multi-Walled Carbon Nanotubes

2021 ◽  
Author(s):  
Bertrand Jóźwiak ◽  
Heather F. Greer ◽  
Anna Kolanowska ◽  
Rafał Jędrysiak ◽  
Justyna Dziadosz ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Carbon Nanotubes ◽  
Multi Walled Carbon Nanotubes ◽  
Ultrasonication Time ◽  
Walled Carbon Nanotubes

Thermal Conductivity Measurement for Carbon-Nanotube Suspensions with 3ω Method

2009 ◽  
Vol 60-61 ◽  
pp. 394-398 ◽  
Author(s):  
Gen Sheng Wu ◽  
Jue Kuan Yang ◽  
Shu Lin Ge ◽  
Yu Juan Wang ◽  
Min Hua Chen ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Carbon Nanotubes ◽  
Volume Fraction ◽  
Aqueous Suspension ◽  
Conductivity Measurement ◽  
3Ω Method ◽  
Conductivity Enhancement ◽  
Multi Walled Carbon Nanotubes ◽  
The Stability ◽  
Walled Carbon Nanotubes

The stable and homogeneneous aqueous suspension of carbon nanotubes was prepared in this study. The stability of the nanofluids was improved greatly due to the use of a new dispersant, humic acid. The thermal conductivity of the aqueous suspension was measured with the 3ω method. The experimental results showed that the thermal conductivity of the suspensions increases with the temperature and also is nearly proportional to the loading of the nanoparticles. The thermal conductivity enhancement of single-walled carbon nanotubes (SWNTs) suspensions is better than that of the multi-walled carbon nanotubes (MWNTs) suspensions. Especially for a volume fraction of 0.3846% SWNTs, the thermal conductivity is enhanced by 40.5%. Furthermore, the results at 30°C match well with Jang and Choi’s model.

Studies on Thermal Conductivity of MWNTs/EPDM Composites by the Heat Probe Method

2012 ◽  
Vol 184-185 ◽  
pp. 1221-1225
Author(s):  
Xiao Guang Zhang ◽  
Ying Jie Ji ◽  
Shi Gang Wang ◽  
Qing Lin Hou
Keyword(s):  
Thermal Conductivity ◽  
Carbon Nanotubes ◽  
Probe Method ◽  
Ethylene Propylene Diene Monomer ◽  
Maximum Difference ◽  
Anisotropic Behavior ◽  
Ethylene Propylene ◽  
Multi Walled Carbon Nanotubes ◽  
General Average ◽  
Walled Carbon Nanotubes

Multi-walled carbon nanotubes (MWNTs) were used as filler to enhance thermal conductivity of Ethylene propylene diene monomer (EPDM) polymers. In order to study the thermal conductivity of the MWNTs/EPDM composites in three different directions, an experiment was conducted by the heat probe method. The results show the general average thermal conductivity of MWNTs/EPDM composites is 0.323 W/m•K，which is significantly higher than EPDM polymers. The maximum difference of thermal conductivity between two directions is 8.7% relative to the general average, indicating obvious anisotropic behavior.

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