Fatty acid alkyl ester nanowebs suitable for renewable thermal energy storage


Önder Karaoğlu E. , SARIER N.

THERMOCHIMICA ACTA, vol.690, 2020 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 690
  • Publication Date: 2020
  • Doi Number: 10.1016/j.tca.2020.178698
  • Title of Journal : THERMOCHIMICA ACTA

Abstract

Owing to their high heat absorption and release capacities, chemical and thermal stability, non-toxicity, two fatty acid alkyl esters (FAAEs), methyl palmitate (MP) and isopropyl palmitate (IPP), were investigated for their use as thermal energy storage (TES) material in a shape stabilized form. Four nanowebs were developed via coaxial electrospinning, using poly(acrylo nitrile) (PAN) or poly(methacrylic acid-co-ethyl acrylate) (PMEA) shell to envelope MP or IPP core. Scanning electron microscope (SEM), transmission electron microscope (TEM) images confirmed cylindrical nanofiber formation, demonstrating a coaxial sheath-core morphology. The phase change enthalpies of PAN-MP, PMEA-MP nanowebs, with average diameters of 259-289 nm, were 71 J g(-1) and 86 J g(-1) at 28-32 degrees C, and those of PAN-IPP, PMAE-IPP were 72 J g(-1) and 60 J g(-1) at 7-15 degrees C during heating cycle in differential scanning calorimeter (DSC) analyses. A composite including PAN-MP nanoweb performed enhanced thermo-physical properties than its control counterpart.