A series of shape-stabilized phase change materials (PCMs), composed of polyethylene glycol (PEG) and halloysite nanotube (HNT) (PEG/HNT), were prepared using a melt-extrusion technique. Chemical and morphological structures, shape-stabilities, thermal properties, and thermal stabilities of the PEG/HNT composites were investigated. The composite properties were strongly dependent on the weight ratio of HNT to PEG. Transmission electron microscopy and Brunauer-Emmett-Teller analyses showed that PEG was perfectly adsorbed into the HNT pores and covered the surfaces of HNT, which helped prevent leakage of melted PEG during a phase change from solid to liquid. Among the various PEG/HNT composites, the PEG/HNT composites with HNT contents in the range 30-50% exhibited good shape-stabilities. Moreover, the rate of heat transfer increased with the HNT content. Based on these results, we expect that the PEG/HNT composites can be used in food packaging materials to counteract the negative effects such as migration induced by unwanted temperature changes. (C) 2018 Elsevier Ltd. All rights reserved.