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Thermal Conductivity Measurement for Carbon-Nanotube Suspensions with 3ω Method
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2009
Year
EngineeringCarbon NanotechnologyHumic AcidPolymer NanocompositesThermal ConductivityChemical EngineeringCarbon-based MaterialThermal Conductivity EnhancementThermodynamicsThermal ConductionCarbon-based FilmsCarbon NanotubesMaterials ScienceNanomanufacturingThermal TransportHeat TransferThermal Conductivity MeasurementThermal EngineeringNanomaterialsNanotubesThermal Property
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.