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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/120166

    Title: Shape-stabilized poly(ethylene glycol) phase change materials with self-assembled network scaffolds for thermal energy storage
    Authors: Lai, Wei-Chi;Chang, Chun-Wai;Hsueh, Chi-Yuan
    Keywords: poly(ethylene glycol);Phase change material;Self-assembled;Gel
    Date: 2021-01-20
    Issue Date: 2021-03-12 12:10:51 (UTC+8)
    Abstract: We propose a facile method for preparing novel poly(ethylene glycol) (PEG) shape-stabilized phase change materials (PCMs) using self-assembled network scaffolds formed by gels for thermal energy storage. 1,3:2,4-dibenzylidene sorbitol (DBS) is capable of self-organizing into 3-D nanofibrillar networks in organic solvents to form gels at relatively low concentrations. In this study, we induced the formation of such nanofibrils in PEG. After PEG is heated to its melting temperature, the DBS gels (nanofibrillar structures) can capture most of the molten PEG, significantly stabilizing the shape and preventing leakage. The fabricated PCMs can sustain their shape up to at least until 96 °C, as determined using rheological measurement. The PEG with a molecular weight of 8000 g/mol containing DBS systems exhibited the best thermal properties, including latent heat, leakage percentage and thermal conductivity, which could be useful in developing novel phase change materials for thermal energy storage.
    Relation: Polymer 213, 123196
    DOI: 10.1016/j.polymer.2020.123196
    Appears in Collections:[Graduate Institute & Department of Chemical and Materials Engineering] Journal Article

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