Tightly-packed fluorinated graphene aerogel/polydimethylsiloxane composite with excellent thermal management properties

Zhang, Yuan; Li, Yifan; Lei, Qiuxing; Fang, Xiao; Xie, Huaqing; Yu, Wei

doi:10.1016/j.compscitech.2022.109302

Cited by 38 publications

(17 citation statements)

References 36 publications

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“…In this work, thermal contact resistance (TCR) is employed to evaluate the heat transfer ability across the interface. Lower TCR implies more efficient heat conduction . A specific testing system is designed to measure the TCR.…”

Section: Results and Discussionmentioning

confidence: 99%

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Robust Smart Fabrics Composed of MgO Nanostructures Encapsulated in Hollow Polystyrene Fibers for Efficient Thermoregulation

Zhang

Dong

et al. 2022

ACS Appl. Nano Mater.

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Functionalized smart fabrics based on phase change materials (PCMs) are potential candidates for adaptive temperature regulation. In this work, composite PCM (CPCM) was first designed with optimized thermophysical properties and antileakage performance. Magnesium oxide (MgO) whiskers were used as the thermal filler to enhance the heat conduction of the CPCM. To improve the compatibility between the filler and the matrix, the whiskers were encapsulated by polystyrene (PS) hollow fibers, forming nanostructured MgO@PS fibers, accompanied by reduced interfacial thermal resistance (ITR). The composite phase change fabric (CPCF) with uniformly distributed internal composition was prepared by the vacuum impregnation method. Owing to the optimized CPCM matrix and specifically designed MgO@PS nanostructure, the final developed fabric (CPCF-M8) showed favorable phase change properties, good stability and mechanical properties, and excellent thermal conductivity of 1.34 W/mK (a 434% improvement compared to the original CPCM). The efficient thermoregulation capability of the CPCF-M8 was further confirmed by performing the practical human thermal management tests with a maximum temperature adjustment of 2.3 °C. In addition, the outdoor temperature adaption tests revealed that the CPCF-M8 was able to provide self-cooling and self-heating, resulting in a maximum 4.2 °C temperature adjustment.

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Section: Results and Discussionmentioning

confidence: 99%

“…Lower TCR implies more efficient heat conduction. 51 A specific testing system is designed to measure the TCR. Figure 5e,f compares the TCR change with various temperatures and loading pressures.…”

Section: Optimization Of the Cpcmmentioning

confidence: 99%

Robust Smart Fabrics Composed of MgO Nanostructures Encapsulated in Hollow Polystyrene Fibers for Efficient Thermoregulation

Zhang

Dong

et al. 2022

ACS Appl. Nano Mater.

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Section: Hydrothermal or Chemical Reductionmentioning

confidence: 99%

“…In general, the structure of graphene aerogels fabricated by the above conventional methods tends to be isotropic, and the thermal conductivities of some isotropic graphene aerogel/polymer composites are summarized in Table 3 [53][54][55][56][57][58][59][60][61][62][63]. It can be seen that graphene aerogels with an internally crosslinked structure have a higher ability in enhancing the thermal conductivity of composites than that of randomly dis-persed graphene prepared by a solution or melt-blending process at the same filler content [53,54]. More importantly, graphene aerogel not only provides 3D continuous phonon paths for more efficient heat transfer but also retains the elasticity while enhancing the deformation resistance, broadening the application prospects of thermal management in specific fields.…”

Section: Hydrothermal or Chemical Reductionmentioning

confidence: 99%

Rational design of graphene structures for preparing high-performance thermal interface materials: A mini review

Ying

Dai

et al. 2022

Sci. China Phys. Mech. Astron.

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With the explosive development in integration of electronic components and the increasing complexity of packaging systems, semiconductor chips own extremely high operation temperatures given by the horrible heat accumulation attributed to the drastically increasing power density. Therefore, highly efficient heat dissipation with the help of rationally designed thermal interface materials (TIMs) is the key to maintaining the device performance and lifespan. Graphene exhibits an ultrahigh intrinsic thermal conductivity, which has attracted a large amount of academic interest due to its significant potential for developing highperformance TIMs. In this tutorial review, we summarize the recent advances in graphene-based TIMs, especially emphasizing the determinate effects of graphene structure and alignment in enhancing the heat transfer capacity of corresponding samples, with detailed discussion in the superiorities and limitations of various graphene skeletons. In addition, we also provide prospects for the challenges and opportunities in the future development of graphene-based TIMs.

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“…Thermal conductive polymer composites have experienced brilliant development in the past decade. From the initial composite system with a single filler to nowadays a multicomponent composite system designed with various strategies, the focus has shifted from a single increase in thermal conductivity to ensuring that other properties are not compromised (Guo et al, 2020;Zhang et al, 2020;Zhang et al, 2022). Except for the filler property itself, the filler content, distribution, and compatibility with the matrix are also essential in affecting heat conduction (Mehra et al, 2018;Orji et al, 2018;Mehra et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Investigation on Silver Modification of Different Shaped Filler on the Heat Conduction Performance Improvement for Silicone Elastomer

Zhang²,

Liu³

et al. 2022

Front. Therm. Eng.

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The continuous miniaturization and multi-function of electronic devices have put forward high requirements for the effective removal of the heat generated in the system. Developing thermally conductive polymer composite-based thermal interface materials is becoming the research hotspot. In addition to the usually concerned intrinsic thermal conductivity of the filler itself, surface modification is one of the important ways to form an effective heat conduction pathway and improve the overall thermal conductivity of materials. In this work, we used silicon rubber as the polymer matrix and achieved the thermal conductivity increment via various fillers with different shapes. The adopted fillers are spherical aluminum oxide (Al2O3), linear carbon fiber and boron nitride sheets, which can be considered as zero-dimensional (0D), one-dimensional (1D), and two-dimensional (2D) fillers respectively. We also prepared the silver-modified fillers and investigated the influence on the formation of heat conduction pathways and interfacial thermal resistance of different shaped fillers. An obvious increment in thermal conductivity of the composite with silver-modified fillers was observed compared to the composite with pristine fillers. Furthermore, through the practical thermal management performance investigation, we found the thermal conductivity increment did improve the actual heat transfer performance of composite elastomers functioning as thermal interface materials

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Tightly-packed fluorinated graphene aerogel/polydimethylsiloxane composite with excellent thermal management properties

Cited by 38 publications

References 36 publications

Robust Smart Fabrics Composed of MgO Nanostructures Encapsulated in Hollow Polystyrene Fibers for Efficient Thermoregulation

Robust Smart Fabrics Composed of MgO Nanostructures Encapsulated in Hollow Polystyrene Fibers for Efficient Thermoregulation

Rational design of graphene structures for preparing high-performance thermal interface materials: A mini review

Investigation on Silver Modification of Different Shaped Filler on the Heat Conduction Performance Improvement for Silicone Elastomer

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