دانلود مقاله ISI انگلیسی شماره 147235
کد مقاله سال انتشار مقاله انگلیسی ترجمه فارسی تعداد کلمات
147235 2018 8 صفحه PDF سفارش دهید 4900 کلمه
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عنوان انگلیسی
Vertically aligned graphene film/epoxy composites as heat dissipating materials
منبع

Publisher : Elsevier - Science Direct (الزویر - ساینس دایرکت)

Journal : International Journal of Heat and Mass Transfer, Volume 118, March 2018, Pages 510-517

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چکیده انگلیسی

Efficient removal of heat has become one of the most critical challenges in the development of modern microelectronic devices. However, it is hard to dramatically improve thermal conductivity of composite materials even with highly loaded thermally conductive fillers due to the lack of efficient heat transfer paths. In this article, both horizontal and vertical graphene film/epoxy (GF/E) composites were designed and fabricated and their thermal and mechanical properties were studied. Vertically aligned structure constructed of continuous graphene films forms channels for heat removal. The thermal conductivity of vertical GF/E composites reaches 384.9 W m−1 K−1 at 44 vol% graphene, i.e. a dramatic enhancement of 3570% per vol% compared to the pure epoxy, and representing the highest value of all epoxy based composites. The cooling performance of light-emitting diode (LED) package with the application of GF/E composites is enhanced by reducing the temperature of LED lamp about 20.7 °C compared with the application of pure epoxy. The vertical GF/E composite proved to be a potential material for heat management of LED or other electronic devices.

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