Effect of Core/Shell Ratio on Performance of Paraffin/Polyurea Phase Change Microencapsules

Wu Sheng Luo; Sheng Fei Yu; Jie Min Zhou

doi:10.4028/www.scientific.net/AMM.556-562.32

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 556-562Effect of Core/Shell Ratio on Performance of...

Effect of Core/Shell Ratio on Performance of Paraffin/Polyurea Phase Change Microencapsules

Abstract:

In this paper, paraffin/polyurea (PU) phase change microencapsules were prepared through an interfacial polymerization method using composite paraffin with solid/liquid mass ratio 3:7 as core materials, 2,4 toluene diisocyanate (TDI) and ethylenediamine (EDA) as monomers, NP-10 as an emulsifier. It was explored the effect of the monomer mass ratio m_EDA: m_TDI on the yield of hollow PU microcapsules, and the effect of core/shell ratio on the particle size and coating efficiency and storage-energy performance of paraffin/PU phase change microencapsules. The experimental results showed the PU yield is increasing with the increasing of EDA:TDI mass ratio until 0.5:1,then keeps the constant. Paraffin/PU phase change microencapsules prepared with the core-shell ratio of 2:1 have better performance: the melting point of 28.1°C, the enthalpy of 58.4KJ/Kg, encapsulation efficiency of 87.5%, the average particle size of 4.32μm, and the uniform particle size distribution.

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Periodical:

Applied Mechanics and Materials (Volumes 556-562)

Pages:

32-35

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.556-562.32

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Online since:

May 2014

Authors:

Wu Sheng Luo*, Sheng Fei Yu, Jie Min Zhou

Keywords:

Cooling Curve, Core-Shell Ratios, Microcapsule, Paraffin, Polyurea

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* - Corresponding Author

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