“…The HCGA2/tetradecanol phase change composite exhibits a high thermal conductivity of 4.54 W m −1 K −1 , which is enhanced by 1193% as compared to that of tetradecanol (0.38 W m −1 K −1 ). The excellent through-plane thermal conductivity of the HCGA/tetradecanol composite can be attributed to four aspects: (i) the interconnecting 3D graphene network reduces the interfaces between the graphene sheets and the tetradecanol for minimizing heat loss at the interfaces, and facilitates the heat transfer to the entire phase change composite; 62 (ii) the introduction of GNPs densifies the thermally conductive network and provides more thermal conduction pathways for rapid heat transfer inside the phase change composite; 63,64 (iii) the arrangement of the graphene sheets in the vertical direction provides efficient thermal conduction pathways for heat transfer from the top to the bottom of the HCGA/tetradecanol composite; 65 and (iv) the greatly enhanced graphene quality by the graphitization prevents phonon scattering and promotes the heat transfer on the graphene sheets. 66…”
Although organic phase change materials can reversibly store and release latent heat during their phase change processes, their weak solar-thermal conversion ability, low thermal conduction, and poor structural stability seriously...
“…The HCGA2/tetradecanol phase change composite exhibits a high thermal conductivity of 4.54 W m −1 K −1 , which is enhanced by 1193% as compared to that of tetradecanol (0.38 W m −1 K −1 ). The excellent through-plane thermal conductivity of the HCGA/tetradecanol composite can be attributed to four aspects: (i) the interconnecting 3D graphene network reduces the interfaces between the graphene sheets and the tetradecanol for minimizing heat loss at the interfaces, and facilitates the heat transfer to the entire phase change composite; 62 (ii) the introduction of GNPs densifies the thermally conductive network and provides more thermal conduction pathways for rapid heat transfer inside the phase change composite; 63,64 (iii) the arrangement of the graphene sheets in the vertical direction provides efficient thermal conduction pathways for heat transfer from the top to the bottom of the HCGA/tetradecanol composite; 65 and (iv) the greatly enhanced graphene quality by the graphitization prevents phonon scattering and promotes the heat transfer on the graphene sheets. 66…”
Although organic phase change materials can reversibly store and release latent heat during their phase change processes, their weak solar-thermal conversion ability, low thermal conduction, and poor structural stability seriously...
“…Over the past few years, the microelectronic industry has been rapidly developed and 5G technology is becoming more mature [ 1 , 2 ]. Electronic equipment is becoming more and more miniaturized and high-performance.…”
The heat generated by a high-power device will seriously affect the operating efficiency and service life of electronic devices, which greatly limits the development of the microelectronic industry. Carbon fiber (CF) materials with excellent thermal conductivity have been favored by scientific researchers. In this paper, CF/carbon felt (CF/C felt) was fabricated by CF and phenolic resin using the “airflow network method”, “needle-punching method” and “graphitization process method”. Then, the CF/C/Epoxy composites (CF/C/EP) were prepared by the CF/C felt and epoxy resin using the “liquid phase impregnation method” and “compression molding method”. The results show that the CF/C felt has a 3D network structure, which is very conducive to improving the thermal conductivity of the CF/C/EP composite. The thermal conductivity of the CF/C/EP composite reaches 3.39 W/mK with 31.2 wt% CF/C, which is about 17 times of that of pure epoxy.
“…In particular, polymer precursors can be mixed with the GNPs dispersion and infiltrated into the GFs, and corresponding composites can be formed after polymerization or thermal curing. For example, the GF/GNP/poly(1,1-difluoroethylene) (PVDF) composite fabricated using this protocol exhibited a thermal conductivity of 6.32 W m −1 K −1 [ 117 ]. Fig.…”
Section: Preconstruction Of Hybrid Graphene Network and Their Conduct...mentioning
Electronic devices generate heat during operation and require efficient thermal management to extend the lifetime and prevent performance degradation. Featured by its exceptional thermal conductivity, graphene is an ideal functional filler for fabricating thermally conductive polymer composites to provide efficient thermal management. Extensive studies have been focusing on constructing graphene networks in polymer composites to achieve high thermal conductivities. Compared with conventional composite fabrications by directly mixing graphene with polymers, preconstruction of three-dimensional graphene networks followed by backfilling polymers represents a promising way to produce composites with higher performances, enabling high manufacturing flexibility and controllability. In this review, we first summarize the factors that affect thermal conductivity of graphene composites and strategies for fabricating highly thermally conductive graphene/polymer composites. Subsequently, we give the reasoning behind using preconstructed three-dimensional graphene networks for fabricating thermally conductive polymer composites and highlight their potential applications. Finally, our insight into the existing bottlenecks and opportunities is provided for developing preconstructed porous architectures of graphene and their thermally conductive composites.
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