Preparation of Microcapsules Containing Phase Change Material and Silicon Carbide Powder with Interfacial Polycondensation Reaction Method

Ryo Morita,Yoshinari Taguchi,Masato Tanaka,Natsukaze Saito

doi:10.4236/msa.2015.63030

Abstract

The fundamental experiments were performed to establish the operational conditions required to prepare the microcapsules containing paraffin wax as a phase change material (PCM) and SiC powder with the interfacial polycondensation reaction. It was investigated how SiC powder affected a few characteristics of microcapsules such as the diameters of microcapsules, latent heat storage density, thermal responsibility and supercooling. In the experiment, the concentration of oil soluble surfactant, the revolution speed of impeller for preparing the (O/W) emulsion and the added weight of SiC powder were changed stepwise. The microcapsules containing PCM in which SiC powder was dispersed could be prepared well and characterized. The diameters of microcapsules increased by containing SiC powder and the content of SiC powder could be increased by performing surface modification of SiC powder. Latent heat storage density decreased with the content of SiC powder. Supercooling of PCM and thermal responsibility could be improved to some degree by containing SiC powder.

Highlights

Hitherto, many kinds of microcapsules have been prepared and applied in the various fields such as thermalHow to cite this paper: Morita, R., Saito, N., Taguchi, Y. and Tanaka, M. (2015) Preparation of Microcapsules Containing Phase Change Material and Silicon Carbide Powder with Interfacial Polycondensation Reaction Method
The phase change material (PCM) microcapsules have been prepared by using suspension polymerization [12]-[14], in-situ polymerization [15] [16], interfacial polycondensation reaction [17]-[19] and miniemulsion polymerization [20] and applied in fabrics, building materials and automobile engine
Effects of polyvinyl alcohol (PVA) Concentration and Revolution Speed In order to investigate the effect of addition of silicon carbide powder (SiC), first it may be necessary to prepare the microcapsule without SiC and to investigate the effects of fundamental background experimental conditions

Summary

Introduction

Many kinds of microcapsules have been prepared and applied in the various fields such as thermal. (2015) Preparation of Microcapsules Containing Phase Change Material and Silicon Carbide Powder with Interfacial Polycondensation Reaction Method. The microcapsules made of PCM and a filler with higher thermal conductivity, namely, the thermal composites may be prepared with the preparation methods stated above by adding solid powder into PCM. In these preparation processes, first, it is necessary to form the oil droplets (PCM-droplets) of PCM containing solid powder, namely, the stable (S/O)/W dispersion. In order to investigate how solid powder affects the dispersing behavior of PCM-droplets and a few characteristics of PCM-microcapsules, it is tried to prepare the microcapsules containing PCM and SiC powder by the interfacial polycondensation reaction method. The purposes of this study are to obtain the fundamental information about the dispersing behavior of PCM-droplets containing solid powder, to prepare the microcapsules containing PCM and SiC powder and to characterize the microcapsules

Materials

Surface Modification of Silicon Carbide

Preparation of Microcapsules

Effects of Fundamental Experimental Conditions

Effect of SiC on Thermal Characteristics

Conclusions