Enhancing Heat Capacity of Colloidal Suspension Using Nanoscale Encapsulated Phase-Change Materials for Heat Transfer
Abbreviated Journal Title
ACS Appl. Mater. Interfaces
encapsulation; phase-change nanoparticles; heat transfer; colloid; suspension; CORE-SHELL NANOPARTICLES; BIOMEDICAL APPLICATIONS; MAGNETIC; NANOPARTICLES; BOTTOM-UP; PARTICLES; GOLD; CONVERSION; STORAGE; SILICA; FLUID; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
This paper describes a new method to enhance the heat-transfer property of a single-phase liquid by adding encapsulated phase-change nanoparticles (nano-PCMs), which absorb thermal energy during solid liquid phase changes. Silica-encapsulated indium nanoparticles and polymer-encapsulated paraffin (wax) nanoparticles have been made using colloid method, and suspended into poly-alpha-olefin (PAO) and water for potential high- and low-temperature applications, respectively. The shells prevent leakage and agglomeration of molten phase-change materials, and enhance the dielectric properties of indium nanoparticles. The heat-transfer coefficients of PAO containing indium nanoparticles (30% by mass) and water containing paraffin nanoparticles (10% by mass) are 1.6 and 1.75 times higher than those of corresponding single-phase fluids. The structural integrity of encapsulation allows repeated use of such nanoparticles for many cycles in high heat generating devices.
Acs Applied Materials & Interfaces
"Enhancing Heat Capacity of Colloidal Suspension Using Nanoscale Encapsulated Phase-Change Materials for Heat Transfer" (2010). Faculty Bibliography 2010s. 264.