Colloid and Polymer Science

, Volume 284, Issue 2, pp 224–228 | Cite as

Preparation and mechanical properties of thermal energy storage microcapsules

Short communication
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Abstract

A series of heat energy storage microcapsules was prepared using melamine-formaldehyde resin as the shell material and the mechanical properties of the shell were investigated. A phase change material whose melting point was 24 °C was used as core and the quantity of heat involved in phase transition was 225.5 J/g. Average diameter of the microcapsules varied from 5 to 10 μm, and the globular surface was smooth and compact. The mechanical properties of the shell were evaluated by observing the surface morphological structure change after application of pressure by means of scanning electron microscopy. When the mass ratio of the core and shell material is 3:1, a yield point of about 1.1×105 Pa was found and when the compression was increased beyond this point the microcapsules showed plastic behavior. This has been attributed to the cross-link density and to the high degree of reaction of the shell material. Different yield points subsequently reflected differences in the mechanical behavior. It was also found that the mechanical intensity of double-shell microcapsules was better than that of single shelled ones.

Keywords

Microcapsule Thermal energy storage Preparation Mechanical properties Yield point 
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Notes

Acknowledgements

This work was supported by The National High Technology Research and Development Program of China. The authors gratefully acknowledge useful discussions with Dr. Fuqiang Zhang, Professor of Polymer Research Institute, College of Chemical Engineering and Technology, Hebei University of Technology.

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Copyright information

© Springer-Verlag 2005

Authors and Affiliations

  1. 1.Department of Packaging EngineeringTianjin University of CommerceTianjinChina
  2. 2.Polymer Research Institute, College of Chemical Engineering and TechnologyHebei University of TechnologyTianjinChina

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