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6CCVD Research

Polyethylene glycol with dual three-dimensional porous carbon nanotube/diamond - a high thermal conductivity of composite PCM

At a Glance

Section titled ā€œAt a Glanceā€
MetadataDetails
Publication Date2023-11-23
JournalNanotechnology
AuthorsXurui Feng, Yuanying Zhang, Zhiliang Yang, Zihao Zhao, Fen Zhu
InstitutionsUniversity of Science and Technology Beijing
Citations12

Abstract

Section titled ā€œAbstractā€

Abstract Polyethylene glycol (PEG) is widely used as a phase change material (PCM) in thermal energy storage systems due to its high latent heat and chemical stability. However, practical application has been hindered by its low thermal conductivity and leakage issues. Therefore, developing shape-stable high thermal conductivity PCM is of great importance. In this study, new shape-stable composite PCM with high thermal conductivity and leak-prevention capabilities were designed. The porous carbon skeleton of diamond foam (DF) and dual-3D carbon nanotube-diamond foam (CDF) were prepared using the microwave plasma chemical vapor deposition method. The composite materials (DF/PEG and CDF/PEG) were produced by vacuum impregnation with PEG and skeletons. The results showed that CDF/PEG had the highest thermal conductivity, measuring 2.30 WĀ·m āˆ’1 Ā·K āˆ’1 , which is 707% higher than that of pure PEG. The employing of 3D networks of CNTs, which can improve the phonon mean free path in DF/PEG (1.79 WĀ·m āˆ’1 Ā·K āˆ’1 ) while reducing phonon dispersion.The phonon vibration of dual-3D CDF plays an important role in heat transfer. PEG was physically absorbed and well-distributed in CDF, alleviating leakage of liquid PEG. The weight loss of CDF/PEG was only 25% at 70 Ā°C for 120 s. Using CDF is an attractive and efficient strategy to increase the heat transfer of PEG and improve heat storage efficiency, alleviate the problem of poor shape-stability.

Tech Support

Section titled ā€œTech Supportā€

Original Source

Section titled ā€œOriginal Sourceā€

References

Section titled ā€œReferencesā€
  1. 2022 - Shape-stabilized phase change material with high phase change enthalpy made of PEG compounded with lignin-based carbon [Crossref]
  2. 2021 - 3D porous copper foam-based shape-stabilized composite phase change materials for high photothermal conversion, thermal conductivity and storage [Crossref]
  3. 2017 - Versatility of polyethylene glycol (PEG) in designing solid-solid phase change materials (PCMs) for thermal management and their application to innovative technologies [Crossref]
  4. 2017 - A review on supercooling of phase change materials in thermal energy storage systems [Crossref]
  5. 2018 - Flexible phase change materials for thermal storage and temperature control [Crossref]
  6. 2019 - One-step and solvent-free synthesis of polyethylene glycol-based polyurethane as solid-solid phase change materials for solar thermal energy storage [Crossref]
  7. 2022 - Polyimide/phosphorene hybrid aerogel-based composite phase change materials for high-efficient solar energy capture and photothermal conversion [Crossref]
  8. 2022 - Polyimide/MXene hybrid aerogel-based phase-change composites for solar-driven seawater desalination [Crossref]
  9. 2022 - Flexible and foldable composite films based on polyimide/phosphorene hybrid aerogel and phase change material for infrared stealth and thermal camouflage [Crossref]
  10. 2021 - Solvent-free synthesis of PEG modified polyurethane solid-solid phase change materials with different Mw for thermal energy storage [Crossref]

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