Synergistic effects of various ceramic fillers on thermally conductive polyimide composite films and their model predictionsopen access
- Authors
- Song, Heeseok; Kim, Byoung Gak; Kim, Yong Seok; Bae, Youn-Sang; Kim, Jooheon; Yoo, Youngjae
- Issue Date
- Mar-2019
- Publisher
- MDPI AG
- Keywords
- Binary filler; Modeling; Polymer composite; Thermal conductivity
- Citation
- Polymers, v.11, no.3
- Journal Title
- Polymers
- Volume
- 11
- Number
- 3
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/18573
- DOI
- 10.3390/polym11030484
- ISSN
- 2073-4360
2073-4360
- Abstract
- In this study, thermally conductive composite films were fabricated using an anisotropic boron nitride (BN) and hybrid filler system mixed with spherical aluminum nitride (AlN) or aluminum oxide (Al 2 O 3 ) particles in a polyimide matrix. The hybrid system yielded a decrease in the through-plane thermal conductivity, however an increase in the in-plane thermal conductivity of the BN composite, resulting from the horizontal alignment and anisotropy of BN. The behavior of the in-plane thermal conductivity was theoretically treated using the Lewis-Nielsen and modified Lewis-Nielsen theoretical prediction models. A single-filler system using BN exhibited a relatively good fit with the theoretical model. Moreover, a hybrid system was developed based on two-population approaches, the additive and multiplicative. This development represented the first ever implementation of two different ceramic conducting fillers. The multiplicative-approach model yielded overestimated thermal conductivity values, whereas the additive approach exhibited better agreement for the prediction of the thermal conductivity of a binary-filler system. © 2019 by the authors.
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