Synthesis of Nanoparticles and Nanofluids

Abstract

Nanofluids are dispersions of nanomaterials in fluids. As the particle size is so small, the thermal energy is often sufficient to keep the nanoparticles suspended in base fluids. Over the past few years, different types of nanofluids have been developed for applications such as heat transfer fluids, lubricants, dynamic sealants, refrigeration, solar devices, cosmetics, drug delivery, sensors, optical filters, hyperthermia, and biomedicine. One of the most widely investigated properties of nanofluids is their heat transfer properties, in view of their potential applications. Compared to their microsized counterparts, nanofluids are promising coolants due to their increased thermal conductivity and better stability. Traditionally, this field falls into the realm of colloid science; hence there is abundant knowledge on the preparation, characterization, and stabilization of nanofluids. This chapter reviews the preparation of nanoparticles and nanofluids using various techniques, detail their stabilization approaches, and the methods used in their characterization. This chapter provides ideal information for researchers practicing in the field of nanofluids and also serves as an excellent reference for freshers who intend to begin research on this topic.