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Preparation of phase-change microcapsules with illite as a filler and their applications in foaming materials

Published online by Cambridge University Press:  06 November 2023

Ming Li
College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai, China
Shuhua Zhang*
College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai, China
Weijun Liu
College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai, China
Binyan Liu
College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai, China
Yu Wang
College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai, China
Corresponding author: Shuhua Zhang; Email:


To solve the problem of the leakage of phase-change materials and expand the application of clay minerals in the field of phase-change materials, illite and paraffin wax were used for the first time as a new binary hybrid core material with silica as the wall material. Phase-change microcapsules were prepared using the sol–gel method and successfully applied in silicone rubber foams. Differential scanning calorimetry showed that the microcapsules had a melting temperature of 62.99°C and a latent heat capacity of 98.24 J g–1, indicating their good heat-storage capacity. Furthermore, the effectiveness of using illite as a filler for preventing paraffin leakage was demonstrated through 200 thermal cycling tests, which demonstrated a leakage rate of only 2.6% compared to 3.2% exhibited by microcapsules without illite.

Short Paper
Copyright © The Author(s), 2023. Published by Cambridge University Press on behalf of The Mineralogical Society of the United Kingdom and Ireland

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Associate Editor: Chun Hui Zhou


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