Enhancing Heat Capacity of Colloidal Suspension Using Nanoscale Encapsulated Phase-Change Materials for Heat Transfer

    Authors

    Y. Hong; S. J. Ding; W. Wu; J. J. Hu; A. A. Voevodin; L. Gschwender; E. Snyder; L. Chow;M. Su

    Comments

    Authors: contact us about adding a copy of your work at STARS@ucf.edu

    Abbreviated Journal Title

    ACS Appl. Mater. Interfaces

    Keywords

    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

    Abstract

    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.

    Journal Title

    Acs Applied Materials & Interfaces

    Volume

    2

    Issue/Number

    6

    Publication Date

    1-1-2010

    Document Type

    Article

    Language

    English

    First Page

    1685

    Last Page

    1691

    WOS Identifier

    WOS:000278963600022

    ISSN

    1944-8244

    Share

    COinS