Cover Image, Volume 136, Issue 32

This cover by Yurong Yan, Chao Lin and colleagues shows fracture surfaces of a phase change polypropylene filament possessing an ionic liquid core enriched with copper decorated muscovite. The flexible phase change material with core-sheath structure was successfully prepared by post-filling of a polypropylene hollow fiber. The ionic liquid 1-butyl-4-methylpyridinium hexafluorophosphate was chosen as core component. Copper decorated muscovite was synthesized via in situ reduction and used as the additive to reduce supercooling and improve thermal conductivity. DOI: 10.1002/app.47830