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Flexible heat-spreading and air-cooling films using nickel-electroplated nanotextured fibers

Authors
Kim, TaegunAn, SeongpilPark, ChanwooChoi, JeehoonYarin, Alexander L.Yoon, Sam S.
Issue Date
14-12월-2020
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Keywords
Natural convection for air cooling; Heat spreading; Nickel microfibers; Electrospinning; Electroplating
Citation
CHEMICAL ENGINEERING SCIENCE, v.227
Indexed
SCIE
SCOPUS
Journal Title
CHEMICAL ENGINEERING SCIENCE
Volume
227
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/50810
DOI
10.1016/j.ces.2020.115951
ISSN
0009-2509
Abstract
Malfunctioning caused by hotspots in high-power and high density microelectronics has been a major problem, particularly for miniaturized advanced portable electronic devices. The use of efficient heat spreaders or cooling films is a viable solution for mitigating the hotspot concern in high-power density electronic devices. In this study, we fabricated thin, flexible, wearable, heat-spreading cooling films decorated with highly nanotextured Ni microfibers. The Ni-electroplated microfibers could quickly spread heat over a solid medium and dissipate heat to the atmosphere via convective cooling. In the present parametric studies, the Ni electroplating time varied from 45 to 60 and 90 min. The optimal condition, which yielded the lowest thermal resistance and the highest heat transfer coefficient, was identified. The Ni microfibers were characterized using scanning electron microscopy, X-ray diffraction, and transmission electron microscopy analyses. (C) 2020 Elsevier Ltd. All rights reserved.
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