High internal phase emulsion templated-polystyrene/carbon nano fiber/hexadecanol composites phase change materials for thermal management applications


Doguscu D. K. , HEKİMOĞLU G., SARI A.

JOURNAL OF ENERGY STORAGE, vol.39, 2021 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 39
  • Publication Date: 2021
  • Doi Number: 10.1016/j.est.2021.102674
  • Journal Name: JOURNAL OF ENERGY STORAGE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Compendex, INSPEC
  • Keywords: High internal phase emulsion, Polymerization, Polystyrene, Hexadecanol, PCM, Composite, Thermal energy storage, Thermal conductivity, CARBON NANOTUBES, ENERGY STORAGE, CONDUCTIVITY, PCM, PERFORMANCE, CONVERSION, ACID
  • Karadeniz Technical University Affiliated: Yes

Abstract

Porous high internal phase emulsion templated polymers (PHPs) with/without carbon nanofiber (CNF) frame-works were synthesized for shape-stabilization of hexadecanol (HD) selected as phase change material (PCM) for thermal energy storage (TES) applications. This impregnation process was resulted in creation of seepage-free composite PCMs with high latent heat storage (LHS) capacity and enhanced thermal conductivity. Morphology, chemical structure, LHS properties and thermal stability of prepared composites were characterized by SEM, FT-IR, DSC and TGA techniques. DSC analysis indicated that the PHP/HD and PHP@CNF/HD(80wt%) composites have a LHS capacity of over 200 J/g at about 46-47 degrees C. The cycled-composite PCMs showed outstanding thermal reliability and chemical stability. Thermal decomposition temperature of HD was considerably extended after impregnation with PHP and PHP/CNF scaffolds. Thermal conductivity of PHP/HD and PHP@CNF/HD was enhanced compared to that of pure HD. The reduction in heat storing/releasing times of PHP@CNF/HD composites relative to PHP/HD composite was proved by considering the measured temperature-time change. Accordingly, especially PHP@CNF/HD composites PCMs have promising prospective for medium temperature-TES practices.