Cellulose Nanofiber Supported 3D Interconnected BN Nanosheets for Epoxy Nanocomposites with Ultrahigh Thermal Management Capability

Chen, Jin; Huang, Xingyi; Zhu, Yingke; Jiang, Pingkai

doi:10.1002/adfm.201604754

Cited by 612 publications

(459 citation statements)

References 52 publications

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“…[3][4][5] Therefore, there is an urgent need to develop a new strategy to prepare desired materials with high thermal conductivity. Inorganic llers, such as aluminum nitride, 6,7 alumina, 8,9 or boron nitride, [1][2][3][4][5][10][11][12][13][14][15][16][17] have been added to polymer matrices to improve the thermal performance because of their high thermal conductivity and electric insulation.…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3][4]10,13,18,19 In recent years, much effort has been directed to the rational design and controlled preparation of hBN-lled polymer composites. 1,[3][4][5]13,[20][21][22][23][24] As reported previously, the thermal property of hBN-lled composites is mainly inuenced by the interface and dispersion state of hBN in polymer composites. 1,4,5,[20][21][22][23]25,26 The interface is mainly inuenced by the compatibility between the llers and matrix.…”

Section: Introductionmentioning

confidence: 99%

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Hot pressing-induced alignment of hexagonal boron nitride in SEBS elastomer for superior thermally conductive composites

Gong

Zhang

et al. 2018

RSC Adv.

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Styrene-ethylene-butylene-styrene (SEBS) composite films containing well-dispersed and highly aligned hexagonal boron nitride (hBN) platelets were achieved by a ball milling process followed by hot-pressing treatment. An ultrahigh in-plane thermal conductivity of 45 W m À1 K À1 was achievable in the SEBS composite film with 95 wt% hBN. The corresponding out-of-plane thermal conductivity was also as high. The hBN/SEBS composite film was further used to cool a CPU connected to a computer, resulting in a decrease by about 4 C in the stable temperature. Percolation thresholds over 40 wt% and 60 wt% in the hBN/SEBS composites were obtained in the in-plane and out-of-plane directions, respectively. This phenomenon has rarely been reported in polymer composites. Molecular dynamics simulations were also conducted to support this percolation threshold. The linear coefficients of the thermal expansion value of the hBN/SEBS composite with 95 wt% hBN was as low as 16 ppm K À1.This was a significant decrease compared to that of pure SEBS (149 ppm K À1). The proposed strategy provides valuable advice about the heat-transfer mechanism in polymer composites containing oriented two-dimensional materials.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hot pressing-induced alignment of hexagonal boron nitride in SEBS elastomer for superior thermally conductive composites

Gong

Zhang

et al. 2018

RSC Adv.

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“…Figure 6a shows the temperature variation of LED within 300 s. One can find that the temperature showed a rapid growth when pure POE and 49.30NG-sample B were used as the thermally conductive substrates, and the equilibrium temperature was as high as 46.8 and 42.7 °C, respectively, after 300 s. In contrast, when 49.30NG-sample A was used as the thermally conductive substrate, the temperature of LED 49.30NG-sample shows much slower growth and lower equilibrium temperature (39.5 °C). [56,57] As shown in Figure 6d, the temperature distribution around the LED is much more uniform after 180 s when 49.30NG-sample A was used as thermally conductive substrate compared to pure POE and 49.30NG-sample B (Figure 6b,c), and the temperature of LED was 47.9 °C (pure POE), 42.2 °C (49.30NG-sample B), and 39.2 °C (49.30NG-sample A), respectively. [56,57] As shown in Figure 6d, the temperature distribution around the LED is much more uniform after 180 s when 49.30NG-sample A was used as thermally conductive substrate compared to pure POE and 49.30NG-sample B (Figure 6b,c), and the temperature of LED was 47.9 °C (pure POE), 42.2 °C (49.30NG-sample B), and 39.2 °C (49.30NG-sample A), respectively.…”

Section: Wwwadvmatinterfacesdementioning

confidence: 99%

A Facile Route to Fabricate Highly Anisotropic Thermally Conductive Elastomeric POE/NG Composites for Thermal Management

Feng

Bai

Shao

et al. 2017

Adv Materials Inter

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Owing to the demand for directional heat dissipation, some technologies have been developed to fabricate polymer-based composites with anisotropic thermal conductivity, and it has been demonstrated that the anisotropic thermal conductivity of composites can be achieved by varying orientation of fillers. The orientation or directional alignment of fillers in the matrix by using the solution-based methods is an important strategy [18] such as vacuum filtration, [19][20][21][22] spin casting, [23] solution casting, [24,25] magnetic fields, [26] electric fields, [27] and self-assembly. [28][29][30][31] Zhao et al. [29] used self-organization strategy to align thermally reduced graphene oxide (TRG) sheets in poly(benzobisoxazole). The composites presented a thermally conductive anisotropy with a highly effective thermal conductivity of 50 W m −1 K −1 along the TRG aligning direction and the thermal conductivity in the direction perpendicular to the TRG alignment was very low. Kuang et al. [32] utilized two-roll milling to fabricate hexagonal boron nitride nanosheets (BNNS)/silicon rubber composite sheets with anisotropic thermal conductivity, and the sheets showed higher thermal conductivity of 5.47 W m −1 K −1 in the orientating direction of BNNS.However, in many cases, the preferred direction to show a high thermal conductivity is not the direction in which the composites do have a high thermal conductivity. [33] Although many methods have been developed to fabricate polymer composite fibers, films, or sheets which have high in-plane thermal conductivity in the oriented direction of the fillers, [9,[34][35][36] a high thermal conductivity in the through-plane direction is more desired as the case in thermal interfacial materials (TIMs), thermal conduction greases, and thermal conduction electronic substrates. [37][38][39][40][41] It has been reported that the bulk thermal conductivity required for TIM should be larger than 4 W m −1 K −1 , which can only be satisfied by the thermal conductivity in the in-plane direction. [42] Yao et al. [43] used silver nanoparticles to decorate the fillers and to improve the through-plane thermal conductivity of BNNS/SiC nanowire bioinspired composite paper. However, the through-plane thermal conductivity of the composite paper was only 1.80 W m −1 K −1 when the filler content was as high as 90 wt%. Besides, magnetic field, electric field, and chemical vapor deposition can be used to align fillers in low-viscosity matrix fluids, but generally the alignment Highly anisotropic polyolefin elastomer (POE)/natural graphite (NG) composites with high through-plane thermal conductivity and excellent mechanical properties, in which NG sheet perfectly aligns along one direction, are prepared by two-roll milling, hot compression, and mechanical cutting. The through-plane thermal conductivity coefficient of POE/NG composites is markedly improved to be 13.27 W m −1 K −1 at an NG loading of 49.30 vol%. When the composite is used as a thermal management material, it shows excellent heat dissipatin...

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“…Ceramic fillers with high thermal conductivity and electrical insulation such as boron nitride (BN), boron nitride nanosheets (BNNS), aluminum nitride (AlN), aluminum oxide(Al 2 O 3 ), and silicon nitride (SiN) can be introduced into the polymer matrix to improve the thermal conductivity and maintain the electrical insulation performance of TIMs [16,20]. Owing to that BN has the highest thermal conductivity in a ceramic filler (250-300 W m −1 K −1 [21] or up to 360 W m −1 K −1 [22]), it has attracted widespread interest [23,24].…”

Section: Introductionmentioning

confidence: 99%

Electrically insulating POE/BN elastomeric composites with high through-plane thermal conductivity fabricated by two-roll milling and hot compression

Feng

Bai

Bao

et al. 2017

Adv Compos Hybrid Mater

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In this work, we reported a kind of electrical insulating, highly through-plane thermally conductive polyolefin elastomer (POE)-based composites filled with commercial boron nitride (BN) fabricated by a conventional melt-mixing method of two-roll milling, followed by hot compression and mechanical cutting. The as-fabricated composites with BN flakes perfectly aligning vertically in the matrix revealed high through-plane thermal conductivity (6.94 W m −1 K −1 at a BN content of 43.75 vol%), outstanding electrical insulation (4.34× Ω cm at a BN content of 43.75 vol%), and quite good mechanical properties. This fabrication procedure features facile process, industrial equipment, and easy industrialization, and the as-prepared composites with outstanding comprehensive performance are promising for thermal interface materials (TIMs) application.

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Cellulose Nanofiber Supported 3D Interconnected BN Nanosheets for Epoxy Nanocomposites with Ultrahigh Thermal Management Capability

Cited by 612 publications

References 52 publications

Hot pressing-induced alignment of hexagonal boron nitride in SEBS elastomer for superior thermally conductive composites

Hot pressing-induced alignment of hexagonal boron nitride in SEBS elastomer for superior thermally conductive composites

A Facile Route to Fabricate Highly Anisotropic Thermally Conductive Elastomeric POE/NG Composites for Thermal Management

Electrically insulating POE/BN elastomeric composites with high through-plane thermal conductivity fabricated by two-roll milling and hot compression

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