Synthesis and characterization of micro/nano capsules of PMMA/capric-stearic acid eutectic mixture for low temperature-thermal energy storage in buildings

Sari A., Alkan C., Ozcan A. N.

ENERGY AND BUILDINGS, vol.90, pp.106-113, 2015 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 90
  • Publication Date: 2015
  • Doi Number: 10.1016/j.enbuild.2015.01.013
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.106-113
  • Karadeniz Technical University Affiliated: No


In this work, polymethylmethacrylate(PMMA)/capric-stearic eutectic mixture (C-SEM) micro/nano capsules were synthesized effectively using emulsion polymerization method. POM and SEM analysis results showed that the synthesized PMMA/C-SEM micro/nano capsules were consisted with spherical shape with uniform structure. The PSD analysis indicated that the mean diameter of the capsules was 1.3 mu m and 28.1%-part of the capsules can be characterized as nano-sized spheres. DSC analysis exposed that the synthesized PMMA/C-SEM (1:2) micro/nano capsules has a melting temperature of 21.37 degrees C, which can be suitable for free cooling of buildings depending on the climatic conditions. It has a latent heat of melting of 116.25J/g, which can be enough to integrate with conventional building materials. TGA results exhibited that the thermal degradation temperature of the micro/nano capsules is very much higher its melting temperature. Moreover, the synthesized PMMA/C-SEM micro/nano capsules have good thermal reliability, chemical stability and thermal conductivity. By taking into consideration all results, it can be also concluded that the micro/nano encapsulated C-SEM can be used to fabricate new building components. (C) 2015 Elsevier B.V. All rights reserved.