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Highly Thermally Conducting Polymer-Based Films with Magnetic Field-Assisted Vertically Aligned Hexagonal Boron Nitride for Flexible Electronic Encapsulation
Yuan, Jie; Qian, Xitang; Meng, Zhichao; Yang, Bo; Liu, Zhi-Quan
2019-05-15
Source PublicationACS APPLIED MATERIALS & INTERFACES
ISSN1944-8244
Volume11Issue:19Pages:17915-17924
AbstractHere, a facile, low-cost, and high-efficiency method to construct a vertically aligned hexagonal boron nitride nanosheet (hBNN) thermal conduction channel structure is proposed to improve the thermal conductivity. First, exfoliated negatively charged BNNs and positively charged FeCo nanocubes self-assemble to form complex nanomaterials by strong electrostatic interactions. Then, the BNNs can orient with FeCo nanocubes in magnetic field, and the {001} facets of BNNs adsorb on the {100} facets of FeCo nanocubes. The large scale range and high-density FeCo/hBN-aligned structures are observed by scanning electron microscopy, which can act as thermal dissipation channels by conveying more phonons through a preponderant thermally conductive direction. The thermal conductivity of the composite films with 30 wt % FeCo and 50 wt % BN filler is 2.25 W m(-1) K-1, 7 times higher than that of the films only containing 50 wt % randomly distributed hBN filler (0.325 W m(-1) K-1) and 20 times higher than pure polydimethylsiloxane films (0.114 W m(-1) K-1). The thermal management capability of the composite films is evaluated as a thermal conducting substrate of a light-emitting diode chip and the infrared thermal technology. Apart from the surprising thermal conductivity, FeCo-BNNs composite films also exhibit superb flexibility.
Keywordhexagonal boron nitride nanosheets (hBNNs) magnetic FeCo nanocubes electrostatic interactions vertically orientation thermal conductivity
Indexed BySCI
Language英语
WOS IDWOS:000468364500087
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/81089
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Yuan, Jie,Qian, Xitang,Meng, Zhichao,et al. Highly Thermally Conducting Polymer-Based Films with Magnetic Field-Assisted Vertically Aligned Hexagonal Boron Nitride for Flexible Electronic Encapsulation[J]. ACS APPLIED MATERIALS & INTERFACES,2019,11(19):17915-17924.
APA Yuan, Jie,Qian, Xitang,Meng, Zhichao,Yang, Bo,&Liu, Zhi-Quan.(2019).Highly Thermally Conducting Polymer-Based Films with Magnetic Field-Assisted Vertically Aligned Hexagonal Boron Nitride for Flexible Electronic Encapsulation.ACS APPLIED MATERIALS & INTERFACES,11(19),17915-17924.
MLA Yuan, Jie,et al."Highly Thermally Conducting Polymer-Based Films with Magnetic Field-Assisted Vertically Aligned Hexagonal Boron Nitride for Flexible Electronic Encapsulation".ACS APPLIED MATERIALS & INTERFACES 11.19(2019):17915-17924.
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