High-performance palmityl palmitate phase change microcapsules for thermal energy storage and thermal regulation

Wei Lu, Anqi Yu, Hao Dong, Zhenglong He, Yuntao Liang, Weitao Liu, Yong Sun and Shuanglin Song

Energy, 2023, vol. 274, issue C

Abstract: Phase change microcapsules, which feature high latent heat and stability and can well mix with epoxy resin substrates, were synthesized through the solvent-free interfacial polymerization method with palmityl palmitate as the core material and low-toxicity dicyclohexylmethane 4,4′-diisocyanate as the shell material. The synthesized microcapsules were characterized by multiple techniques. The performances of microcapsules at different core-shell ratios were compared, and the applicabilities of epoxy resins with different contents of optimal microcapsules were investigated. Results show that, at a core-shell ratio of 16:4, the synthesized microcapsules achieve an encapsulation rate of 84.47%, and their enthalpies of melting and crystallization reach 218.49 J/g and 219.72 J/g, respectively. Moreover, the microcapsules exhibit outstanding thermal stability and reliability. They can remain intact without leakage after heating at 150 °C for 2 h, and their enthalpies of melting and crystallization can remain over 196.58 J/g and 202.23 J/g after 500 heating and cooling cycles. In addition, the microcapsules can uniformly disperse in epoxy resin, significantly influencing its heat transfer property and temperature regulation ability. With a 15% microcapsule content, the epoxy resin has a reduced thermal conductivity of 0.5834 W/mK, with delays of 76.0% and 51.4% in the time used for the temperature rise/fall process.

Keywords: Phase change material; Microcapsules; Palmityl palmitate; Thermal properties; Epoxy resin (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544223007302
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:274:y:2023:i:c:s0360544223007302

DOI: 10.1016/j.energy.2023.127336

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().