Shape-stabilized phase change materials with high thermal conductivity based on paraffin/graphene oxide composite

Mohammad Mehrali, Sara Tahan Latibari, Mehdi Mehrali, Hendrik Simon Cornelis Metselaar*, Mahyar Silakhori

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

227 Citations (Scopus)

Abstract

This paper mainly focuses on the preparation, characterization, thermal properties and thermal stability and reliability of new form-stable composite phase change materials (PCMs) prepared by vacuum impregnation of paraffin within graphene oxide (GO) sheets. SEM and FT-IR techniques and TGA and DSC analysis are used for characterization of material and thermal properties. The composite PCM contained 48.3 wt.% of paraffin without leakage of melted PCM and therefore this composite found to be a form-stable composite PCM. SEM results indicate that the paraffin bounded into the pores of GO. FT-IR analysis showed there was no chemical reaction between paraffin and GO. Temperatures of melting and freezing and latent heats of the composite were 53.57 and 44.59 °C and 63.76 and 64.89 kJ/kg, respectively. Thermal cycling tests were done by 2500 melting/freezing cycling for verification of the form-stable composite PCM in terms of thermal reliability and chemical stability. Thermal conductivity of the composite PCM was highly improved from 0.305 to 0.985 (W/mk). As a result, the prepared paraffin/GO composite is appropriate PCM for thermal energy storage applications because of their acceptable thermal properties, good thermal reliability, chemical stability and thermal conductivities.

Original languageEnglish
Pages (from-to)275-282
Number of pages8
JournalEnergy conversion and management
Volume67
DOIs
Publication statusPublished - 16 Jan 2013
Externally publishedYes

Keywords

  • Composites
  • Sustainable energy
  • Thermal conductivity
  • Thermal energy storage
  • Thermal properties

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