Vertically aligned carbon fibers as supporting scaffolds for phase change composites with anisotropic thermal conductivity and good shape stability

Sheng, Nan; Zhu, Ruijie; Dong, Kaixin; Nomura, Takahiro; Chen, Zhu; Aoki, Yoshitaka; Habazaki, H.; Akiyama, Tomohiro

doi:10.1039/c8ta11329g

Cited by 101 publications

(35 citation statements)

References 28 publications

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“…This method is simple and widely used, which can be used for large-scale production of CF composites. However, improving the impregnation efficiency of CF materials is the key to enhancing the thermal conductivity [ 63 ].…”

Section: Preparation Methodsmentioning

confidence: 99%

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Preparation, Properties and Mechanisms of Carbon Fiber/Polymer Composites for Thermal Management Applications

et al. 2021

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With the increasing integration and miniaturization of electronic devices, heat dissipation has become a major challenge. The traditional printed polymer circuit board can no longer meet the heat dissipation demands of microelectronic equipment. If the heat cannot be removed quickly and effectively, the efficiency of the devices will be decreased and their lifetime will be shortened. In addition, the development of the aerospace, automobiles, light emitting diode (LED{ TA \1 “LED; lightemitting diode” \s “LED” \c 1 }) and energy harvesting and conversion has gradually increased the demand for low-density and high thermal conductive materials. In recent years, carbon fiber (CF{ TA \1 “CF; carbon fiber” \c 1 }) has been widely used for the preparation of polymer composites due to its good mechanical property and ultra-high thermal conductivity. CF materials easily form thermal conduction paths through polymer composites to improve the thermal conductivity. This paper describes the research progress, thermal conductivity mechanisms, preparation methods, factors influencing thermal conductivity and provides relevant suggestions for the development of CF composites for thermal management.

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Section: Preparation Methodsmentioning

confidence: 99%

“… Schematic diagram for vacuum impregnation method to prepare carbon fiber based composites. Reprinted with permission from [ 63 ]. Copyright The Royal Society of Chemistry 2019.…”

Section: Figurementioning

confidence: 99%

Preparation, Properties and Mechanisms of Carbon Fiber/Polymer Composites for Thermal Management Applications

et al. 2021

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“…Similarly, Sheng et al. [ 15 ] fabricated vertically aligned hollow CFs with different densities via the direct carbonization of rolled cotton sheets at 2400 °C (Figure 13b). After paraffin was infiltrated into CFs using a vacuum impregnation method, the anisotropic composite PCMs were successfully prepared.…”

Section: Carbon‐based Composite Pcms For Thermal Energy Storage Transfer and Conversionmentioning

confidence: 99%

Section: Carbon‐based Composite Pcms For Thermal Energy Storage Transfer and Conversionmentioning

confidence: 99%

Carbon‐Based Composite Phase Change Materials for Thermal Energy Storage, Transfer, and Conversion

et al. 2021

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Phase change materials (PCMs) can alleviate concerns over energy to some extent by reversibly storing a tremendous amount of renewable and sustainable thermal energy. However, the low thermal conductivity, low electrical conductivity, and weak photoabsorption of pure PCMs hinder their wider applicability and development. To overcome these deficiencies and improve the utilization efficiency of thermal energy, versatile carbon materials have been increasingly considered as supporting materials to construct shape‐stabilized composite PCMs. Despite some carbon‐based composite PCMs reviews regarding thermal conductivity enhancement, a comprehensive review of carbon‐based composite PCMs does not exist. Herein, a systematic overview of recent carbon‐based composite PCMs for thermal storage, transfer, conversion (solar‐to‐thermal, electro‐to‐thermal and magnetic‐to‐thermal), and advanced multifunctional applications, including novel metal organic framework (MOF)‐derived carbon materials are provided. The current challenges and future opportunities are also highlighted. The authors hope this review can provide in‐depth insights and serve as a useful guide for the targeted design of high‐performance carbon‐based composite PCMs.

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“…In practical applications of the LHS system (especially industrial waste heat recovery), anisotropic thermal conductivity of the PCC could be advantageous for achieving directed heat transfer and reducing heat loss in the unwanted direction. Directed high-speed heat transfer during system charging and discharging can improve the heat recovery efficiency, thereby reducing heat loss to the environment [20].…”

Section: Effective Thermal Conductivity Of the Pccmentioning

confidence: 99%

High Anisotropic Thermal Conductivity, Long Durability Form-Stable Phase Change Composite Enhanced by a Carbon Fiber Network Structure

et al. 2021

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To address the drawback of low thermal conductivity of conventional organic phase change materials (PCMs), a paraffin-wax-based phase change composite (PCC) was assembled via a vacuum impregnation method, using a new type of carbon fiber network material as the supporting matrix. The carbon fiber sheet (CFS) material exhibited a network structure comprising high-thermal-conductivity carbon fibers, beneficial for enhancing the heat transfer properties of the PCC. The sheet-shaped carbon fiber material was stacked and compressed, and then impregnated with the liquid paraffin wax PCM to form the composite. The thermal conductivity, durability, shape stability, chemical stability, and heat storage characteristics of the PCC specimen were carefully analyzed. The maximum thermal conductivity of the PCC was 11.68 W·m−1·K−1 (4670% compared to that of pure paraffin) in the radial direction, and 0.93 W·m−1·K−1 in the axial direction of the sample, with 17.44 vol % of added CFS. The thermal conductivity retention rate after 200 thermal cycles was 78.6%. The PCC also displayed good stability in terms of chemical structure, shape, and heat storage ability. This study offers insights and a possible strategy for the development of anisotropic high-thermal-conductivity PCCs for potential applications in latent heat storage systems.

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Vertically aligned carbon fibers as supporting scaffolds for phase change composites with anisotropic thermal conductivity and good shape stability

Abstract: Anisotropic thermally conductive and shape-stabilized phase change composites were prepared with vertically aligned carbon fibers as supporting scaffolds.

Cited by 101 publications

References 28 publications

Preparation, Properties and Mechanisms of Carbon Fiber/Polymer Composites for Thermal Management Applications

Preparation, Properties and Mechanisms of Carbon Fiber/Polymer Composites for Thermal Management Applications

Carbon‐Based Composite Phase Change Materials for Thermal Energy Storage, Transfer, and Conversion

High Anisotropic Thermal Conductivity, Long Durability Form-Stable Phase Change Composite Enhanced by a Carbon Fiber Network Structure

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