Accelerated Thermal Cycling Test of Microencapsulated Paraffin Wax/Polyaniline Made by Simple Preparation Method for Solar Thermal Energy Storage

Mahyar Silakhori; Mohammad Sajad Naghavi; Hendrik Simon Cornelis Metselaar; Teuku Meurah Indra Mahlia; Hadi Fauzi; Mohammad Mehrali

doi:10.3390/ma6051608

Accelerated Thermal Cycling Test of Microencapsulated Paraffin Wax/Polyaniline Made by Simple Preparation Method for Solar Thermal Energy Storage

Materials (Basel). 2013 Apr 29;6(5):1608-1620. doi: 10.3390/ma6051608.

Authors

Mahyar Silakhori¹, Mohammad Sajad Naghavi², Hendrik Simon Cornelis Metselaar³, Teuku Meurah Indra Mahlia^{4

5}, Hadi Fauzi⁶, Mohammad Mehrali⁷

Affiliations

¹ Department of Mechanical Engineering and Advanced Material Research Center, University of Malaya, Kuala Lumpur 50603, Malaysia. silakhori.mahyar@gmail.com.
² Department of Mechanical Engineering and Advanced Material Research Center, University of Malaya, Kuala Lumpur 50603, Malaysia. msnaghavi@gmail.com.
³ Department of Mechanical Engineering and Advanced Material Research Center, University of Malaya, Kuala Lumpur 50603, Malaysia. h.metselaar@um.edu.my.
⁴ Department of Mechanical Engineering, Universiti Tenaga Nasional, Kajang 43000, Selangor, Malaysia. indra@uniten.edu.my.
⁵ Department of Mechanical Engineering, Syiah Kuala University, Banda Aceh 23111, Indonesia. indra@uniten.edu.my.
⁶ Department of Mechanical Engineering and Advanced Material Research Center, University of Malaya, Kuala Lumpur 50603, Malaysia. hadidoank@gmail.com.
⁷ Department of Mechanical Engineering and Advanced Material Research Center, University of Malaya, Kuala Lumpur 50603, Malaysia. mohamad.mehrali@siswa.um.edu.my.

Abstract

Microencapsulated paraffin wax/polyaniline was prepared using a simple in situ polymerization technique, and its performance characteristics were investigated. Weight losses of samples were determined by Thermal Gravimetry Analysis (TGA). The microencapsulated samples with 23% and 49% paraffin showed less decomposition after 330 °C than with higher percentage of paraffin. These samples were then subjected to a thermal cycling test. Thermal properties of microencapsulated paraffin wax were evaluated by Differential Scanning Calorimeter (DSC). Structure stability and compatibility of core and coating materials were also tested by Fourier transform infrared spectrophotometer (FTIR), and the surface morphology of the samples are shown by Field Emission Scanning Electron Microscopy (FESEM). It has been found that the microencapsulated paraffin waxes show little change in the latent heat of fusion and melting temperature after one thousand thermal recycles. Besides, the chemical characteristics and structural profile remained constant after one thousand thermal cycling tests. Therefore, microencapsulated paraffin wax/polyaniline is a stable material that can be used for thermal energy storage systems.

Keywords: Phase Change Materials (PCM); energy storage; paraffin wax; thermal reliability.