Thermal Conductivity Enhancement and Shape Stabilization of Phase-Change Materials Using Three-Dimensional Graphene and Graphene Powder
Autor: | S. Lai-Iskandar, Siu Hon Tsang, Fei Ni Leong, Luca Simonini, E. Hang Tong Teo, Sunil C. Joshi, Roland Yingjie Tay, Jean-Paul Dudon, Dunlin Tan, Wen Hao Li |
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Přispěvatelé: | School of Electrical and Electronic Engineering, School of Mechanical and Aerospace Engineering, Thales Solutions Asia Pte Ltd, Thales Alenia Space S.A., Thales Alenia Space S.p.A, Temasek Laboratories |
Rok vydání: | 2020 |
Předmět: |
Materials science
Graphene General Chemical Engineering Three-dimensional Graphene Energy Engineering and Power Technology 02 engineering and technology 021001 nanoscience & nanotechnology law.invention Phase change Fuel Technology Thermal conductivity 020401 chemical engineering Phase Change Materials law Thermal Electrical and electronic engineering [Engineering] 0204 chemical engineering Composite material 0210 nano-technology Porosity |
Zdroj: | Energy & Fuels. 34:2435-2444 |
ISSN: | 1520-5029 0887-0624 |
Popis: | The porous interconnected structure of three-dimensional graphene (3DC) combines the excellent thermal conductivity of graphene with an interconnected architecture, thereby creating a thermal network within composites infused with 3DC. In this study, improvements in thermal conductivity, latent heat of fusion (Hf) and shape-stability of paraffin were compared between paraffin phase change materials (PCM) infused with 3DC and with discrete graphene flakes (GP) at the same filler loading to quantify the advantage of the interconnected structure. Paraffin infused with a 3DC of higher bulk density (3DCH) was also compared to identify the effects of increasing filler density. Thermal conductivity of the PCM composites was measured using the hot-disk method and shape-stabilization was compared through thermal cycling in an environment chamber. We found that the interconnected architecture of 3DC improved the properties of the paraffin matrix in multiple ways. 3DC improved the solidification process for paraffin with heterogeneous nucleation, helped to retain the shape of the PCM composite over thermal cycling, reduced void formation within the PCM and induced a large increase in thermal conductivity at 7.4 times and 5.2 times that of neat paraffin for composites infused with 3DCH and regular 3DC respectively, with only a small trade-off in Hf. EDB (Economic Devt. Board, S’pore) Accepted version |
Databáze: | OpenAIRE |
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