Remarkably reduced thermal contact resistance of graphene/olefin block copolymer/paraffin form stable phase change thermal interface material

Liu, Changqing; Yu, Wei; Chen, Cheng; Xie, Huaqing; Cao, Bing-Yang

doi:10.1016/j.ijheatmasstransfer.2020.120393

Cited by 52 publications

(17 citation statements)

References 20 publications

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“…A special type of TIM is in the form of a phase‐change material (PCM). [ 37,41–46 ] This type of TIM was first reported by Liu and Chung in 2001. [ 42 ] The phase change involves melting, which occurs at temperatures not much above room temperature.…”

Section: Phase‐change Materials As Timsmentioning

confidence: 99%

Performance of Thermal Interface Materials

Chung

2022

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The thermal interface materials (TIMs) used for improving thermal contacts are considered in terms of the performance, performance consideration criteria, performance evaluation methods, and material development approaches. The performance is described mainly by the thermal contact conductance, which refers to the conductance across the thermal contact surfaces that sandwiches the TIM. This conductance depends on the conformability, thermal conductivity, and small‐thickness feasibility. However, the vast majority of published work does not consider this conductance, but only the thermal conductivity within the TIM. The highest TIM performance is exhibited by the thermal pastes and low‐melting alloys.

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Section: Phase‐change Materials As Timsmentioning

confidence: 99%

Performance of Thermal Interface Materials

Chung

2022

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“…• Nu R a = 0.19 1/3 for vertical surface where 10 9 < Ra < 10 13 • Nu R a = 0.54 1/4 for horizontal surface (upward) where 10 4 < Ra < 10 7…”

Section: Modeling and Analysismentioning

confidence: 99%

“…To better control the thermal durability of electronic components without any electrical power input, passive thermal management systems can be the alternative solution. Some of the potential options cover a large variety of heat sinks, 4,5 heat spreaders, 6,7 heat pipes, [8][9][10][11][12] as well as thermal interface materials [13][14][15][16] which are recognized as some of the most preferred passive thermal management methods. Kothari et al 17 experimentally investigated the thermal performance of various phase change material (PCM)-based heat sinks particularly for portable electronic devices.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation and performance evaluation of thermal energy management arrangements for robots

Sevinchan

Dinçer

Lang

2022

Energy Science & Engineering

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In this study, thermal energy management systems with the choices of three different thermal insulating materials are experimentally investigated for robotic applications. These insulating materials are stone wool, fiberglass and extruded polyurethane with air cooling and heating system which are evaluated in the low and high temperature environments to really assess the thermal behavior and performance in such extreme ambient conditions. In this regard, thermodynamic and heat transfer modeling studies are undertaken to investigate various performance parameters, including energy and exergy efficiencies. The experimental results showed that energy efficiencies of the thermal management methods are obtained 46.34% for stone wool, 31.15% for fiberglass, and 44.3% for air cooling system at 40°C. Moreover, the exergy efficiencies are 12.6% for stone wool, 15.08% for fiberglass, 18.91% for extruded polyurethane, and 3.86% for air cooling system.

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“…The exfoliation and electrical experiments with graphene motivated studies of other properties of this material, and led to the discovery of the unique thermal conductivity of graphene and few-layer graphene (FLG). − In recent years, one can witness a transition of graphene and FLG to numerous practical applications, which utilize their thermal properties, including composite coatings, solid heat spreaders, and thermal interface materials (TIMs). − The use of the graphene–FLG mixture as fillers in composites proved to be particularly beneficial. The initial studies found that the thermal conductivity of epoxy-based composites with low loading fractions of randomly distributed graphene fillers can be improved substantially by a factor of ×25. , A similar significant enhancement in the thermal conductivity characteristics of noncured TIMs with graphene fillers has been reported by some of us and others. ,,, A comparative study of the thermal conductivity of graphene-based noncured TIMs with commercially available TIMs demonstrated that the TIMs with graphene conduct heat more effectively even with lower filler loadings .…”

Section: Introductionmentioning

confidence: 99%

Specifics of Thermal Transport in Graphene Composites: Effect of Lateral Dimensions of Graphene Fillers

Sudhindra

Rashvand

Wright

et al. 2021

ACS Appl. Mater. Interfaces

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We report on the investigation of thermal transport in noncured silicone composites with graphene fillers of different lateral dimensions. Graphene fillers are comprised of few-layer graphene flakes with lateral sizes in the range from 400 to 1200 nm and the number of atomic planes from 1 to ∼100. The distribution of the lateral dimensions and thicknesses of graphene fillers has been determined via atomic force microscopy statistics. It was found that in the examined range of the lateral dimensions, the thermal conductivity of the composites increases with increasing size of the graphene fillers. The observed difference in thermal properties can be related to the average gray phonon mean free path in graphene, which has been estimated to be around ∼800 nm at room temperature. The thermal contact resistance of composites with graphene fillers of 1200 nm lateral dimensions was also smaller than that of composites with graphene fillers of 400 nm lateral dimensions. The effects of the filler loading fraction and the filler size on the thermal conductivity of the composites were rationalized within the Kanari model. The obtained results are important for the optimization of graphene fillers for applications in thermal interface materials for heat removal from high-power-density electronics.

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Remarkably reduced thermal contact resistance of graphene/olefin block copolymer/paraffin form stable phase change thermal interface material

Cited by 52 publications

References 20 publications

Performance of Thermal Interface Materials

Performance of Thermal Interface Materials

Experimental investigation and performance evaluation of thermal energy management arrangements for robots

Specifics of Thermal Transport in Graphene Composites: Effect of Lateral Dimensions of Graphene Fillers

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