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Synergistic effects on the enhancement of thermal conductive properties of thermal greases
Author(s) -
He Xuhua,
Wang Yuechuan
Publication year - 2019
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.47726
Subject(s) - materials science , thermal conductivity , boron nitride , composite material , thermal , electrical conductor , thermal management of electronic devices and systems , thermal grease , grease , filler (materials) , nanocomposite , chemical engineering , mechanical engineering , physics , meteorology , engineering
Efficient heat dissipation from electronic devices with high‐degree integration and high‐power density has become an urgent and complex problem. We report here novel thermal greases with an enhanced thermal conductivity using graphene flakes (GFs), hexagonal boron nitride (h‐BN), and hydroxypropyl cellulose (HPC) as fillers. The obtained GF/h‐BN/HPC thermal grease at 23 vol % h‐BN loading exhibits a thermal conductivity enhancement 555%, compared with the pure PDMS matrix, and also about 50, 169, and 115% higher than that with GF/h‐BN, h‐BN/HPC and h‐BN as the filler for the thermal grease, respectively. We attribute it to the synergistic effects among GF, h‐BN, and HPC, due to the formation of thermally conductive networks. This study provides a strategy for preparing thermal greases for thermal management applications. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 47726.