Preparation of Phase Change Microcapsules with the Enhanced Photothermal Performance

Polymers

卷:11

Mina Shahi¹  Sara Tahan Latibari¹  Vassiliki Drosou²  Ruud Cuypers³  Jacco Eversdijk⁴ 

[1] Faculty of Engineering Technology, Department of Thermal and Fluid engineering (TFE), University of Twente, 7500 AE Enschede, The Netherlands;

[2] Solar Thermal Systems Department, Center for Renewable Energy Sources, Pikermi, 19009 Athens, Greece;

[3] TNO, 2628 CA Delft, The Netherlands;

[4] TNO, 5656 AE Eindhoven, The Netherlands;

关键词: phase change material;    micro-encapsulation;    polyurea;    graphite nanoplatelet;    thermal storage;    photothermal;   

DOI  :  10.3390/polym11091507

来源: DOAJ

【 摘 要 】

The performance of solar-thermal conversion systems can be improved by incorporation of encapsulated phase change materials. In this study, for the first time, Crodatherm^TM 60 as a phase change material (PCM) was successfully encapsulated within polyurea as the shell supporting material. While preparing the slurry samples, graphite nanoplatelet (GNP) sheets were also incorporated to enhance the thermal and photothermal properties of the prepared materials. The morphology and chemical properties of these capsules were characterized by scanning electron microscopy (SEM) and Fourier transform infrared (FTIR) spectrum, respectively. The results show the spherical-like and core-shell structure of capsules with an average diameter size of 3.34 μm. No chemical interaction was observed between the core and the supporting materials. The thermal characteristics of the microencapsulated PCMs (MEPCMs), analyzed by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA), indicate that the prepared samples with 0.1 weight percentage of GNP possess the latent heat of 95.5 J/g at the phase transition temperature of about 64 °C. Analyzing the rheological properties of the prepared slurry with 16 wt % of MEPCMs proves that the prepared material meet the requirements given by the heat transfer applications. The thermal storage capacity, good thermal stability, and improved photothermal performance of the prepared material make it a potential candidate for using in direct absorption solar thermal applications.

【 授权许可】

Unknown