Fluorinated Carbon Nanotube/Nanofibrillated Cellulose Composite Film with Enhanced Toughness, Superior Thermal Conductivity, and Electrical Insulation,ACS Applied Materials & Interfaces

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Fluorinated Carbon Nanotube/Nanofibrillated Cellulose Composite Film with Enhanced Toughness, Superior Thermal Conductivity, and Electrical Insulation
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2018-09-12 00:00:00 , DOI: 10.1021/acsami.8b12565
Xiongwei Wang ₁ , Peiyi Wu _{1,

2}

Affiliation

Recently, graphene and carbon nanotubes (CNTs) promise considerable application potentials in the highly efficient thermal management of high-power devices because of their superb thermal conductivity (TC). However, the high electrical conductivity hampers their use in some fields where electrical insulating components are always required. Herein, to coordinate the thermal and electrical conductivity of CNT, fluorinated CNT (FCNT) was first used as a thermally conductive filler to prepare composite film with nanofibrillated celluloses (NFCs) via facile vacuum-assisted filtration. The obtained composite film shows a well-organized layered structure of the building blocks along the planar direction. Moreover, the one-dimensional structure of NFCs and the strong interaction of NFCs and FCNTs ensure sufficient connection between FCNT themselves and the reduced interfacial thermal resistance of NFCs/FCNTs, so that efficient heat transfer pathways can be well reserved, leading to simultaneous accessibility of high in-plane TC of 14.1 W m^–1 K^–1 and favorable electrical insulation property at an FCNT content of 35 wt %. Despite such a high FCNT loading, the strong interaction between NFCs and FCNTs enables the composite film to possess enhanced toughness, reliable mechanical strength, and flexibility. Therefore, we think that these outstanding comprehensive properties guarantee that the prepared composite film has promising applications in heat dissipation of next-generation portable and collapsible electronic devices.

中文翻译：

具有增强的韧性，优异的导热性和电绝缘性的氟化碳纳米管/纳米原纤化纤维素复合膜

近年来，由于石墨烯和碳纳米管（CNTs）极好的导热系数（TC），它们有望在高功率器件的高效热管理中具有巨大的应用潜力。但是，高电导率妨碍了它们在始终需要电绝缘组件的某些领域中的使用。在本文中，为了协调CNT的导热性和导电性，首先将氟化CNT（FCNT）用作导热填料，以通过方便的真空辅助过滤制备具有纳米原纤化纤维素（NFC）的复合膜。所获得的复合膜在平面方向上显示出结构良好的分层结构。而且，^–1 K ^–1，FCNT含量为35 wt％时具有良好的电绝缘性能。尽管FCNT的负载量很高，但NFC和FCNT之间的强相互作用使复合膜具有增强的韧性，可靠的机械强度和柔韧性。因此，我们认为这些优异的综合性能保证了所制备的复合膜在下一代便携式和可折叠电子设备的散热方面具有广阔的应用前景。

更新日期：2018-09-12

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