Ultrahigh thermal conductive polymer composites by the 3D printing induced vertical alignment of carbon fiber

Zhang, Zhenbang; Li, Maohua; Wang, Yandong; Wen, Desheng; Li, Linhong; Chen, Yapeng; Kong, Xianwen; xu, kang; yang, rongjie; Gong, Peng; Zhang, Jianxiang; Cai, Tao; Lin, Cheng‐Te; Nishimura, Kazuhito; Li, Haonan; Jiang, Nan; Yu, Jinhong

doi:10.1039/d3ta01676e

Cited by 36 publications

(10 citation statements)

References 58 publications

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“…Three models were set to the same boundary conditions: the top line was set to a constant temperature of 300 K, both sides (left and right sides) had perfectly thermal insulation, and the bottom was set to a heat flux of 1 × 10 7 W/m 2 . The steady-state heat transfer was calculated from the below equations normal∇ q⃗ = normalQ q⃗ = prefix− k normal∇ T where q⃗ is the heat flux vector, Q is the heat generation ( Q = 0 in this study because of the absence of heat generation inside the material matrix), T is the temperature, and k is thermal conductivity. , The thermal conductivities of PVDF and BNNT were set as 0.1 and 300 W/mK in the modeling studies, respectively.…”

Section: Methodsmentioning

confidence: 99%

Boron Nitride Nanotube-Aligned Electrospun PVDF Nanofiber-Based Composite Films Applicable to Wearable Piezoelectric Sensors

Yanar,

Kim,

Jung

et al. 2024

ACS Appl. Nano Mater.

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In this research, piezoelectric and heat-dissipating boron nitride nanotube (BNNT)/polyvinylidene fluoride (PVDF) nanocomposite thin films having superior properties for wearable sensing applications are introduced. Neat and 2.5 wt % (BNNT2.5)-and 5.0 wt % BNNT (BNNT5.0)-embedded PVDF thin films were prepared by first producing gel-like electrospun nanofibers followed by hot-rolling, respectively. The piezoelectric performance of BNNT5.0 was as high as 128.0 ± 5.4 mV under 300 kPa, while Neat and BNNT2.5 showed 9.9 ± 0.1 and 22.7 ± 8.8 mV, respectively. Furthermore, BNNT2.5 also presents almost 9 times and BNNT5.0 presents more than 3 times higher thermal conductivities of 0.89 ± 0.40 and 0.32 ± 0.10 W/mK, respectively, compared to Neat (0.10 ± 0.01 W/mK) and both present very high thermal resistance with no phase change up to 180 °C and less than 4% shrinkage even at 200 °C, while Neat begins melting at 120 °C. BNNT2.5 and BNNT5 showed a high water-repelling property and mechanical strength as well. Tensile strengths and elongation for BNNT2.5 and BNNT5.0 were 18.1 MPa with 52.1% and 21.2 MPa and 34.0%, respectively. They both showed a low moisture absorption property with high water repellence with stable and hydrophobic water contact angles (92.2°with only 0.4°c hange for BNNT2.5 and 103.6°with 2.4°change for BNNT5.0 in 30 s), while Neat was in the hydrophilic region. Consequently, BNNT/PVDF films with highly enhanced piezoelectric-sensing and heat-dissipating properties and mechanical, thermal, and moisture resistance can be applicable for various wearable sensing environments.

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Section: Methodsmentioning

confidence: 99%

Boron Nitride Nanotube-Aligned Electrospun PVDF Nanofiber-Based Composite Films Applicable to Wearable Piezoelectric Sensors

Yanar,

Kim,

Jung

et al. 2024

ACS Appl. Nano Mater.

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“…Aligning nanoscale reinforcements in a polymer matrix results in a high enhancement efficiency of TC, and typical strategies include the ice-templated method, CVD, and 3D printing. − The current studies on TIMs focus on the high TC enhancement of these nanocomposites, while the effect of material properties on the heat dissipation efficiency of devices has received limited attention. The effect of the contact thermal resistance between these nanocomposites and devices should be fully considered in future research, as it is a key parameter affecting the heat dissipation capability of advanced devices. − Therefore, developing advanced TIMs to minimize the thermal resistance between the heat sink and device is a key topic in the field of thermal management.…”

Section: Applications Of Thermally Conductive Polymer Nanocompositesmentioning

confidence: 99%

Application-Driven High-Thermal-Conductivity Polymer Nanocomposites

Lin,

Li,

Liu

et al. 2024

ACS Nano

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Polymer nanocomposites combine the merits of polymer matrices and the unusual effects of nanoscale reinforcements and have been recognized as important members of the material family. Being a fundamental material property, thermal conductivity directly affects the molding and processing of materials as well as the design and performance of devices and systems. Polymer nanocomposites have been used in numerous industrial fields; thus, high demands are placed on the thermal conductivity feature of polymer nanocomposites. In this Perspective, we first provide roadmaps for the development of polymer nanocomposites with isotropic, in-plane, and through-plane high thermal conductivities, demonstrating the great effect of nanoscale reinforcements on thermal conductivity enhancement of polymer nanocomposites. Then the significance of the thermal conductivity of polymer nanocomposites in different application fields, including wearable electronics, thermal interface materials, battery thermal management, dielectric capacitors, electrical equipment, solar thermal energy storage, biomedical applications, carbon dioxide capture, and radiative cooling, are highlighted. In future research, we should continue to focus on methods that can further improve the thermal conductivity of polymer nanocomposites. On the other hand, we should pay more attention to the synergistic improvement of the thermal conductivity and other properties of polymer nanocomposites. Emerging polymer nanocomposites with high thermal conductivity should be based on application-oriented research.

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“…The vertical alignment not only improved the thermal conductivity but also positively affected the mechanical strength and processing properties of the material. Zhang et al 38 successfully fabricated thermal interface materials with a remarkable planar thermal conductivity of 35.22 (W/mÁK) using 3D printing techniques, which induced a vertical orientation of carbon fibers. Lu et al 39 utilized the hydrothermal method to construct a microscopically bionic leaf vein-like three-dimensional structure of BN.…”

Section: Introductionmentioning

confidence: 99%

Preparation and construction mechanism of thermal conductive epoxy‐based composite via magnetic field induced orientation

Luo,

Shan,

Xiong

et al. 2023

J of Applied Polymer Sci

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BN was modified with Fe3O4 to confer it with paramagnetic responsivity. The scanning electron microscopy and energy dispersive spectrometer (EDS) results demonstrated that with the assistance of an external magnetic field, the paramagnetic BN particles within an epoxy matrix are effectively aligned along the direction of the magnetic field during the curing process of epoxy resin, hence forming continuous thermal conduction pathways. Therefore, the thermal conductivity of the epoxy‐based composite filled with 30 wt% of BN and externally applied with a 50 mT magnetic flux density was 0.7417 (W/m·K), an improvement of 207.89% relative to the pure epoxy resin. The establishment of continuous thermal pathways facilitates effective phonon conduction, thereby further enhancing the thermal conductivity of the material. Meanwhile, this study investigates the chain formation mechanism of Fe3O4‐modified BN under the influence of a magnetic field. When subjected to an applied magnetic field, the magnetic BN embedded in an epoxy resin matrix undergoes magnetization, rotation, and contact. Subsequently, multiple particles initially form short chains, then aggregate into longer chains aligned with the direction of the magnetic field. The findings indicate that the magnetic field induced particle alignment method holds significant potential in the fabrication of high thermal conductivity polymer composites with low filler loading.

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Ultrahigh thermal conductive polymer composites by the 3D printing induced vertical alignment of carbon fiber

Abstract: As the power density increasing in electronic devices, requirements for high-performance thermal interface materials that can efficiently bridge the heat transport channel between the heat sink and the target electronics...

Cited by 36 publications

References 58 publications

Boron Nitride Nanotube-Aligned Electrospun PVDF Nanofiber-Based Composite Films Applicable to Wearable Piezoelectric Sensors

Boron Nitride Nanotube-Aligned Electrospun PVDF Nanofiber-Based Composite Films Applicable to Wearable Piezoelectric Sensors

Application-Driven High-Thermal-Conductivity Polymer Nanocomposites

Preparation and construction mechanism of thermal conductive epoxy‐based composite via magnetic field induced orientation

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