Title

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

Authors

Authors

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

Comments

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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

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