Production of PEG grafted PAN copolymers and their electrospun nanowebs as novel thermal energy storage materials

Nihal Sarier*, Refik Arat, Yusuf Menceloglu, Emel Onder, Ezgi Ceren Boz, Oguzhan Oguz

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

42 Citations (Scopus)

Abstract

This paper deals with the synthesis of poly(ethylene glycol) (PEG) grafted poly(acrylo nitrile) (PAN) copolymers as novel solid-solid phase change materials via two step free radical polymerization reaction. The structural and thermal characterizations of the synthesized copolymers, namely PEG1500-g-PAN, PEG2000-g-PAN, PEG4000-g-PAN, PEG10000-g-PAN and PEG35000-g-PAN, were performed by Fourier transform infrared spectroscopy, Nuclear magnetic resonance spectrometry, differential scanning calorimetry and thermogravimetry. They were thermally stable and had the capability of absorbing and releasing great amount of heat ranging between 70 and 126 J g−1 at the temperature interval of 40–65 °C during heating and successive cooling cycles. To transform the PEG-g-PAN copolymers into the assemblies appropriate for thermal energy storage (TES) systems, thermo-regulating PEG-g-PAN nanowebs were also produced by means of coaxial electrospinning. The SEM images of PEG-g-PAN nanowebs displayed that they were all composed of hollow cylindrical ultrafine fibers with the average diameters ranging in 175–277 nm. During the differential scanning calorimetry measurements, those nanowebs demonstrated repeatable solid-solid phase change with the heat storage capacities varying between 35 and 75 J g−1 at the same temperature interval with the corresponding PEG-g-PAN copolymers. The PEG-g-PAN copolymers and their electrospun nanowebs can be promising TES materials and can have convenient industrial applications.

Original languageEnglish
Pages (from-to)83-93
Number of pages11
JournalThermochimica Acta
Volume643
DOIs
Publication statusPublished - 10 Nov 2016

Bibliographical note

Publisher Copyright:
© 2016 Elsevier B.V.

Funding

This work was based on the research project TUBITAK 213M281, which was funded by the Scientific & Technical Research Council of Turkey (TUBITAK). We also thank Istanbul Kultur University for financial support.

FundersFunder number
Scientific & Technical Research Council of Turkey
TUBITAK213M281
T.C. İstanbul Kültür Üniversitesi

    Keywords

    • DSC
    • Electrospinning
    • Grafting
    • PAN
    • PCM
    • PEG

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