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Flexible Graphene Nanocomposites with Simultaneous Highly Anisotropic Thermal and Electrical Conductivities Prepared by Engineered Graphene with Flat Morphology.
ACS Nano ( IF 15.8 ) Pub Date : 2020-08-31 , DOI: 10.1021/acsnano.0c04456 Yafang Zhuang 1, 2 , Kun Zheng 1 , Xinyu Cao 1 , Qingrui Fan 1, 2 , Gang Ye 1 , Jiaxin Lu 1, 2 , Jingnan Zhang 1 , Yongmei Ma 1
ACS Nano ( IF 15.8 ) Pub Date : 2020-08-31 , DOI: 10.1021/acsnano.0c04456 Yafang Zhuang 1, 2 , Kun Zheng 1 , Xinyu Cao 1 , Qingrui Fan 1, 2 , Gang Ye 1 , Jiaxin Lu 1, 2 , Jingnan Zhang 1 , Yongmei Ma 1
Affiliation
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Achieving nanocomposites with simultaneous highly anisotropic thermal and electrical conductivities using carbon materials remains challenging as carbon material tends to form random networks in nanocomposites. Here, highly anisotropic and flexible graphene@naphthalenesulfonate (NS)/poly(vinyl alcohol) (GN/PVA) nanocomposites were fabricated using a layer-by-layer scraping method with flat graphene as the starting functional filler. NS acted as a bond bridge for linking the graphene (π–π interaction) and PVA (hydrogen bond). The results showed well-dispersed graphene in the nanocomposites while maintaining flat morphology with uniform in-plane orientation. The as-fabricated nanocomposites exhibited highly anisotropic thermal and electrical conductivities. The in-plane and out-of-plane thermal conductivities of the nanocomposite prepared with 10.0 wt % graphene reached 13.8 and 0.6 W m–1 K–1, and in-plane and out-of-plane electrical conductivities were 10–1 and 10–10 S cm–1, respectively. This indicated highly anisotropic thermal and electrical conductivities. Furthermore, the nanocomposites showed elevated flexibility and tensile strength from 42.0 MPa for pure PVA to 110.0 MPa for GN-5.0 wt %/PVA. In sum, the proposed strategy is effective for the preparation of nanocomposites with high flexibility, as well as superior anisotropic thermal and electrical conductivities.
中文翻译：
具有平面各向异性的工程石墨烯制备的同时具有高各向异性导热和导电率的柔性石墨烯纳米复合材料。
使用碳材料同时具有高度各向异性的导热性和导电性来实现纳米复合材料仍然具有挑战性，因为碳材料倾向于在纳米复合材料中形成随机网络。在这里，使用层状石墨烯作为起始功能性填料，采用逐层刮擦法制备了高度各向异性和柔性的石墨烯@萘磺酸盐（NS）/聚（乙烯醇）（GN / PVA）纳米复合材料。NS充当连接石墨烯（π-π相互作用）和PVA（氢键）的键桥。结果表明，石墨烯分散在纳米复合材料中，同时保持平坦的形态和均匀的面内取向。制成的纳米复合材料表现出高度各向异性的导热性和导电性。用10制备的纳米复合材料的面内和面外导热率。–1 K –1，面内和面外电导率分别为10 –1和10 –10 S cm –1。这表明高度各向异性的热导率和电导率。此外，纳米复合材料显示出提高的柔韧性和拉伸强度，从纯PVA的42.0 MPa到GN-5.0 wt％/ PVA的110.0 MPa。总之，所提出的策略对于制备具有高柔韧性以及优异的各向异性导热性和导电性的纳米复合材料是有效的。
更新日期：2020-08-31
中文翻译：
具有平面各向异性的工程石墨烯制备的同时具有高各向异性导热和导电率的柔性石墨烯纳米复合材料。
使用碳材料同时具有高度各向异性的导热性和导电性来实现纳米复合材料仍然具有挑战性，因为碳材料倾向于在纳米复合材料中形成随机网络。在这里，使用层状石墨烯作为起始功能性填料，采用逐层刮擦法制备了高度各向异性和柔性的石墨烯@萘磺酸盐（NS）/聚（乙烯醇）（GN / PVA）纳米复合材料。NS充当连接石墨烯（π-π相互作用）和PVA（氢键）的键桥。结果表明，石墨烯分散在纳米复合材料中，同时保持平坦的形态和均匀的面内取向。制成的纳米复合材料表现出高度各向异性的导热性和导电性。用10制备的纳米复合材料的面内和面外导热率。–1 K –1，面内和面外电导率分别为10 –1和10 –10 S cm –1。这表明高度各向异性的热导率和电导率。此外，纳米复合材料显示出提高的柔韧性和拉伸强度，从纯PVA的42.0 MPa到GN-5.0 wt％/ PVA的110.0 MPa。总之，所提出的策略对于制备具有高柔韧性以及优异的各向异性导热性和导电性的纳米复合材料是有效的。
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