Highly thermally conductive and flexible phase change composites enabled by polymer/graphite nanoplatelet-based dual networks for efficient thermal management

Wu, Si; Li, Tingxian; Wu, Minqiang; Xu, Jiaxing; Hu, Yihao; Chao, Jingwei; Yan, Tao; Wang, Ruzhu

doi:10.1039/d0ta05904h

Cited by 204 publications

(60 citation statements)

References 61 publications

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“…As can be seen from Figure 3 and Table 2 , an overall amount of the closed pores, their size, and homogenous distribution strongly depend on the amount of the cross-linker as well as on the presence of the PW in the system, as was already investigated by other authors [ 34 , 35 ]. With increasing amount of cross-linker porosity significantly increasing.…”

Section: Resultssupporting

confidence: 53%

Foamed Phase Change Materials Based on Recycled Polyethylene/Paraffin Wax Blends

et al. 2021

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Foamed phase-change materials (FPCMs) were prepared using recycled linear low-density polyethylene (LLDPE) blended with 30 wt.% of paraffin wax (PW) and foamed by 1,1′-azobiscarbamide. The protection of pores’ collapse during foaming process was insured through chemical cross-linking by organic peroxide prior foaming. This work represents one of very few attempts for a preparation of polymeric phase change foams without a use of micro-encapsulated phase change component leading to the enhancement of the real PCM component (PW) within a final product. The porous structure of fabricated foams was analyzed using micro-computed tomography, and direct observation, and reconstruction of the internal structure was investigated. The porosity of FPCMs was about 85–87 vol.% and resulting thermal conductivity 0.054–0.086 W/m·K. Differential Scanning Calorimetry was used to determine the specific enthalpies of melting (22.4–25.1 J/g) what is the latent heat of materials utilized during a heat absorption. A stability of samples during 10 heating/cooling cycles was demonstrated. The phase change changes were also investigated using the dynamic mechanical analysis from 0° to 65 °C during the 10 cycles, and the mechanical stability of the system and phase-change transition were clearly confirmed, as proved by DSC. Leaching test revealed a long-term release of PW (around 7% of its original content) from samples which were long term stored at temperatures over PW melting point. This is the usual problem concerning polymer/wax blends. The most common, industrially feasible solution is a lamination of products, for instance by aluminum foils. Finally, the measurement of the heat flow simulating the real conditions shows that samples containing PW decrease the energy passing through the sample from 68.56 to 34.88 kJ·m−2. In this respect, FPCMs provide very effective double functionality, firstly common thermal insulators, and second, as the heat absorbers acting through melting of the PW and absorbing the excessive thermal energy during melting. This improves the heat protection of buildings and reduces temperature fluctuations within indoor spaces.

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Section: Resultssupporting

confidence: 53%

Foamed Phase Change Materials Based on Recycled Polyethylene/Paraffin Wax Blends

et al. 2021

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“…However, to realize the practical application of organic solid–liquid PCM, it is necessary to solve the leakage problem in the process of phase change [ 94 , 103 ]. Additionally, for faster thermal response and more efficient thermal management, the thermal conductivity need be increased [ 104 ].…”

Section: Thermally Conductive Pcm (Thermal-storage Thermal Management Material)mentioning

confidence: 99%

Recent Advances in Design and Preparation of Polymer-Based Thermal Management Material

Zhang

Shi

2021

Polymers

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The boosting of consumer electronics and 5G technology cause the continuous increment of the power density of electronic devices and lead to inevitable overheating problems, which reduces the operation efficiency and shortens the service life of electronic devices. Therefore, it is the primary task and a prerequisite to explore innovative material for meeting the requirement of high heat dissipation performance. In comparison with traditional thermal management material (e.g., ceramics and metals), the polymer-based thermal management material exhibit excellent mechanical, electrical insulation, chemical resistance and processing properties, and therefore is considered to be the most promising candidate to solve the heat dissipation problem. In this review, we summarized the recent advances of two typical polymer-based thermal management material including thermal-conduction thermal management material and thermal-storage thermal management material. Furtherly, the structural design, processing strategies and typical applications for two polymer-based thermal management materials were discussed. Finally, we proposed the challenges and prospects of the polymer-based thermal management material. This work presents new perspectives to develop advanced processing approaches and construction high-performance polymer-based thermal management material.

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“…In addition, the polyethylene glycol molecules involved in the polymerization strategy for the synthesis of PCMs film can be easily grafted with many functional molecules, which provides new ideas for the development of more advanced flexible materials. Furthermore, Wu et al [81] . also developed a flexible shape‐stable phase change composite with high thermal conductivity by constructing a dual polymer and graphite nanoplate network as a PCMs multifunctional matrix.…”

Section: Flexible and Wearable Devicesmentioning

confidence: 99%

Recent Advances in Polymer‐Containing Multifunctional Phase‐Change Materials

et al. 2021

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Phase‐change materials (PCMs) play a key role in thermal energy storage owing to their high‐energy storage density and small temperature fluctuation during the phase‐transition stage. Polymers, either as a supporting material to prevent liquid leakage during the phase‐change process or used with specific target, have been widely recognized in the fabrication of PCM composites. In the meantime, due to the continued demand for variety of PCMs, a single thermal energy storage function seems to be insufficient to meet these needs. Thanks to the good compatibility with PCMs and the structural adjustable properties of polymers, they have been broadly used as the second component in the multifunctional PCMs composite. In this Review, strategies for multifunctional PCMs supported by polymers and their potential energy applications, such as thermal energy harvesting and storage, shape memory, wearable devices, self‐cleaning, and other forms of applications, are summarized comprehensively. The future research directions and challenges of multifunctional PCMs with polymers are also discussed.

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Highly thermally conductive and flexible phase change composites enabled by polymer/graphite nanoplatelet-based dual networks for efficient thermal management

Abstract: Phase change materials (PCMs) have been widely used for passive thermal management and energy storage due to the high latent heat capacity near phase transition points. However, the low thermal...

Cited by 204 publications

References 61 publications

Foamed Phase Change Materials Based on Recycled Polyethylene/Paraffin Wax Blends

Foamed Phase Change Materials Based on Recycled Polyethylene/Paraffin Wax Blends

Recent Advances in Design and Preparation of Polymer-Based Thermal Management Material

Recent Advances in Polymer‐Containing Multifunctional Phase‐Change Materials

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