Preparation Of Stable Nanofluids Research Articles

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.

Preparation, Sedimentation, and Agglomeration of Nanofluids

AbstractResearch on nanofluids has increased significantly in the last decade due to the distinctive potential in many applications such as enhanced heat transfer processes, drug delivery systems, and membrane manufacturing processes. The study of dispersion behavior of nanoparticles in liquids is a topic of keen interest towards the preparation of stable nanofluids. A comprehensive review on the recent progress in preparation and stability of nanofluids is presented. Settling of nanoparticles is the only predicament towards preparation of stable nanofluids which takes place due to formation of agglomerates. The settling behavior of nanoparticles in nanofluids and techniques to stop agglomeration are described. Nanofluid preparation techniques, assessment method of stability, and methods to reduce agglomeration are discussed.