Preparation and characterization of GO/PEG photo-thermal conversion form-stable composite phase change materials

Min Li and Chengcheng Wang

Renewable Energy, 2019, vol. 141, issue C, 1005-1012

Abstract: In this paper, graphene oxide (GO) with full band light absorption and photo-thermal conversion property was selected as the photo-thermal conversion material. The GO/PEG composite phase change material (PCM) was prepared by ultrasound-assisted physical blending. The micro-structure, crystallinity and chemical composition of the composite PCMs were characterized by XRD, SEM, and FT-IR analysis techniques, respectively. The thermal storage properties and photo-thermal conversion performance of GO/PEG composite PCMs were tested by DSC and self-assembled photo-thermal conversion test system. The results showed that the inter-layer spacing of GO was enlarged. PEG was distributed between the layers and surfaces of GO through the capillary force of GO and inter-molecular hydrogen bonding. The latent heat of the GO/PEG composite PCMs were more than 80 J/g and the phase transition temperature was 50.5 °C. The composite PCM could absorb visible light (300–800 nm) and store energy through light drive. Photo-thermal conversion efficiency of the GO/PEG reached 0.75, which indicated that the prepared GO/PEG composite PCMs had great application prospect in the field of photo-thermal conversion.

Keywords: Graphene oxide; Photo-thermal conversion; Phase change material (search for similar items in EconPapers)
Date: 2019
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Citations: View citations in EconPapers (11)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:141:y:2019:i:c:p:1005-1012

DOI: 10.1016/j.renene.2019.03.141

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