Enhancement of the effective thermal conductivity of iron oxide‐coated hexagonal boron nitride/polyimide composite sheets using samarium–cobalt magnets

Itaoka, Takuro; Matsubayashi, Ryohei; Haruki, Masashi

doi:10.1002/app.54446

Cited by 3 publications

(1 citation statement)

References 39 publications

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“…As the electronics industry improves by leaps and bounds, the frequency of using electronic devices has increased dramatically, and miniaturization, multifunction, more compact, and high density of electronic devices have attracted widespread attention 1–3 . However, the rapid rise in temperature within electronic devices poses a significant challenge, as excessive heat can substantially reduce the lifespan of electronics and, in severe cases, lead to premature failure 4,5 . Therefore, effective heat dissipation is crucial for maintaining the stable and optimal performance of electronic devices 6,7 .…”

Section: Introductionmentioning

confidence: 99%

Enhanced thermal conductivity of PVDF by filling with T‐ZnOw and MWCNT based on hybrid 3D network

Liu,

Chen,

Chen

et al. 2024

J of Applied Polymer Sci

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In this work, a novel approach is taken to enhance the thermal conductivity and mechanical properties of composites by developing highly efficient thermally conductive PVDF‐based composites. This is developed by incorporating tetra‐pod zinc oxide whiskers (T‐ZnOw) in conjunction with multiwalled carbon nanotubes (MWCNT) to form binary hybrid fillers within a polyvinylidene fluoride (PVDF) matrix. Polydopamine (PDA), characterized by physical adsorption, is selected for surface coating on T‐ZnOw since T‐ZnOw is easy to self‐agglomerate and difficult to modify by physical and chemical methods. The coating aims to improve the dispersibility of T‐ZnOw and reduce the interfacial thermal resistance with the substrate. MWCNT is oxidized to improve its dispersion ability while strengthening the interaction with the matrix, due to the absence of interaction between MWCNTs and polymer matrix and poor dispersibility with the matrix. The dispersity of PDA@T‐ZnOw and o‐MWCNT is improved, and the three‐dimensional hybrid network structure can be better constructed to improve the thermal conductivity of the composite membrane. At a filler content of 25 wt%, the thermal conductivity reaches 0.302 W m−1 K−1 for T‐ZnOw–MWCNT–PVDF and 0.222 W m−1 K−1 for PDA@T‐ZnOw–o‐MWCNT–PVDF.

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Section: Introductionmentioning

confidence: 99%

Enhanced thermal conductivity of PVDF by filling with T‐ZnOw and MWCNT based on hybrid 3D network

Liu,

Chen,

Chen

et al. 2024

J of Applied Polymer Sci

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Controllable exfoliation of hexagonal boron nitride and tailored three‐dimensional network for highly thermally conductive polymer composites

Lin,

Dong,

Chen

et al. 2023

J of Applied Polymer Sci

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Thermally conductive but electrically insulating composites have become significant components for efficient thermal dissipation in electronic devices due to their miniaturization, integration, and functionalization. Over the past decade, extensive efforts have been dedicated to improving the thermal conductivity of polymer‐based composites through incorporating various thermally conductive fillers. In particular, boron nitride nanosheets (BNNS) with outstanding intrinsic thermal conductivity, electrical insulation, and chemical stability, have sparked intensive interest from researchers. However, BNNS usually suffers from severe aggregation in polymer matrices, leading to high interfacial thermal resistance. Rational construction of three‐dimensional (3D) BNNS continuous networks is crucial for efficient thermal transport and has also been established as a feasible and effective approach to achieve significant enhancement of thermal conductivity for polymer/BNNS composites. In this brief review, we summarized and introduced recent progress on the controllable exfoliation of h‐BN and tailored three‐dimensional networks for highly thermally conductive polymer composites. The fabrication strategies for 3D BNNS networks and the structure–properties relationships of polymer/BNNS composites are highlighted. Finally, the opportunities and challenges for polymer/BNNS composites based on 3D thermally conductive networks are prospected.

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The preparation and feasibility analysis of magnetic orientation method in the study of thermal insulation composite materials in the field of electronic packaging

You,

Weng,

et al. 2024

Polymer Composites

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As an emerging field of current technological development, the heat dissipation performance of electronic packaging materials has become the key to determining product reliability. Therefore, the applied thermal interface materials (TIMs) need to simultaneously meet the performance indicators of thermal conductivity, mechanics, and insulation. Although BN had excellent in‐plane thermal conductivity and insulation performance, it is currently difficult to achieve vertical orientation of powder which leads the layered powder cannot complete a continuous and effective heat transfer path along the Z‐axis direction inside the composite material. In order to solve the above two problems, out‐of‐plane thermal conductive composite was prepared by introducing magnetic oriented method. In order to comprehensively evaluate the thermal conductivity, mechanical and electrical properties, BN@Fe3O4/EP magnetic oriented composites were compared with BN@PDA‐Al2O3/EP composite prepared by mechanical blending method. The vertical thermal conductivity of the magnetic oriented composite material was 2.24 W/(m·K) at 30 vol%, which was 3.39 times that of the blended composite material and 12.4 times that of pure EP. This proves that the magnetic oriented composite materials prepared by the research institute can meet the vertical heat transfer needs in the field of electronic packaging and have high research value in this area.Highlights BN@Fe3O4 core–shell particles were prepared with both thermal conductivity and magnetic controllability. The thermosetting composites were prepared by heated through preliminary gel point and then cured at high temperature. The orientation of powder inside the matrix was constructed, resulted in excellent out‐of‐plane heat transfer performance. Comparisons were made between various properties of magnetic oriented materials and conventional blend materials. The magnetic orientation method is feasible in the field of electronic packaging.

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Enhancement of the effective thermal conductivity of iron oxide‐coated hexagonal boron nitride/polyimide composite sheets using samarium–cobalt magnets

Cited by 3 publications

References 39 publications

Enhanced thermal conductivity of PVDF by filling with T‐ZnOw and MWCNT based on hybrid 3D network

Enhanced thermal conductivity of PVDF by filling with T‐ZnOw and MWCNT based on hybrid 3D network

Controllable exfoliation of hexagonal boron nitride and tailored three‐dimensional network for highly thermally conductive polymer composites

The preparation and feasibility analysis of magnetic orientation method in the study of thermal insulation composite materials in the field of electronic packaging

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