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

By Min Li, Chengcheng Wang. Renewable Energy, 2019

160 citations recorded by the source corpus.

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.

Subfields: Mechanical Engineering, Renewable Energy, Sustainability and the Environment

View Paper: https://www.semanticscholar.org/paper/33755a73ba8d65d5771ed0606fbb2342d589d776