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On the Use of Glycosylated Single-Walled Carbon Nanotubes as a Coolant Additive

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A dispersion of single-walled carbon nanotubes (SWCNTs) in an aqueous medium was prepared by functionalizing the SWCNT with D-glucosamine, as confirmed using FT-IR and NMR techniques. The SWCNT and sugar functionalized SWCNT were studied using scanning and transmission electron microscopy. The grafting resulted in a good dispersion of the SWCNTs in water of an amount less than 1 mg ml−1. The thermal conductivity was measured using high sensitivity thermistor, whose resistance was measured using a 6½ digit multimeter. Assuming the Fourier heat conduction equation to be valid for an analysis of the present situation (to determine the overall heat transfer coefficient), a 24% increase in the rate of heat transfer was arrived at for dispersions of less than 0.1% sugar functionalized SWCNTs in 1 ml of water. These results are compared with results on SWCNT and MWCNT dispersions in various media in order to demonstrate the superior heat transfer properties of the present medium.
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Keywords: D-GLUCOSAMINE; NANO-FLUID; SINGLE-WALLED CARBON NANOTUBE; THERMAL CONDUCTIVITY

Document Type: Short Communication

Publication date: August 1, 2011

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  • Nanoscience and Nanotechnology Letters (NNL) is a multidisciplinary peer-reviewed journal consolidating nanoscale research activities in all disciplines of science, engineering and medicine into a single and unique reference source. NNL provides the means for scientists, engineers, medical experts and technocrats to publish original short research articles as communications/letters of important new scientific and technological findings, encompassing the fundamental and applied research in all disciplines of the physical sciences, engineering and medicine.
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