In this study, soft sphere surfactants, with varying head group charges and alkyl chain lengths, were investigated for their effects on the thermal conductivity, rheology, density, contact angle and refractive index of nanofluids. It was noted that the thermal conductivity of the ionic surfactant micelles follows the effective medium theory of poor thermal conductance, with interfacial resistance towards infinity. It was also determined that the longer the alkyl chains on ...
The Transient Plane Source Method is a helpful tool to test for the thermal conductivity of homogenous materials, however researchers at both the Chalmers University of Technology and Gothenberg University have created a process to test the thermal conductivities of inhomogeneous materials. For this experiment, a thermal analyzer was used to determine the thermal conductivities of four different sample materials (polymers and Pyrex glass) – each with different sizes and defects. ...
In this study, the thermal conductivity of alkanes was altered, by using inverse micellar templating and nanofibers. The main goal of this study was to create alkanes with tunable thermal conductivities, for their use as phase change materials in heat management. The thermal conductivity of an n-hexadecane product with inverse micelles of different volume fractions was analyzed. The tunable thermal conductivity of the micelle templated alkaline was determined to be ...
This research article proposes the use of a thermal constants analyzer to measure thermal properties of relatively thin samples. Five different metallic samples containing copper, aluminum and brass were used to test the accuracy of the new and improved method. Previously, this method has been used to test the thermal properties of thin metallic sheets, however with the new and improved method, it is possible to measure samples with thicknesses ...
Thermal conductivity testing was done on nitrogenated ultrananocrystalline diamond films on silicon. Temperature dependence on thermal conductivity was measured using these two techniques. A decrease in thermal conductivity was observed with the introduction of nitrogen addition. It was observed that MCD had the highest thermal conductivity followed by UNCD at 25% nitrogen and UNCD at 0% nitrogen....
