Preparation of Long Duration Stable CNT Nanofluid Using SDS

CNT nanofluid shows better heat transfer rate due to their high thermal conductivity. Due to hydrophobic nature of CNT, preparation of stable nanofluid is a major challenge. Here nanofluid was prepared using modified two-step method using multi-walled CNT as nanomaterial, double distilled water as base fluid and SDS as surfactant. CNT concentration was varied from 0.1 to 0.3 wt%, surfactant/CNT ratio from 1 to 3 and ultrasonication time from 0 to 180 min. The results indicate that ultrasonication time and surfactant/CNT ratio have a significant effect on the dispersion of CNT in surfactant water solution. Prepared CNT nanofluid was found to be stable for a longer duration.