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 ...
