The Contribution of Conductive Network Conversion in Thermal Conductivity Enhancement of Polymer Composite: A Theoretical and Experimental Study
Jingyao Sun, Xiaowen Zhang, Qingyuan Du, Vignesh Murugadoss, Daming Wu and Zhanhu Guo
1 College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
2 State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai, 200433, China
3 State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, China
4 Integrated Composites Laboratory (ICL), Department of Chemical & Biomolecular Engineering, University of Tennessee, Knoxville, TN, 37996, USA
5 Advanced Materials Division, Engineered Multifunctional Composites (EMC) Nanotech. LLC, Knoxville, TN, 37934, USA
Abstract
In view of thermal conductive network (TCN) conversion from high thermal dissipation to low thermal dissipation, a new theory of thermal conductivity (TC) enhancement was proposed in this paper. The TC enhancement effect was greatly limited due to the formation of an uncompacted self-assembly network in the composites prepared by traditional compounding methods. In order to achieve the goal of TCN conversion from high thermal dissipation to low thermal dissipation, we combined the TCN densification through space restriction forced network assembly (SCFNA) with adding rigid particles. A composite system of polydimethylsiloxane/short carbon fiber/glass bubble (PDMS/SCF/GB) was selected as the modelling object and used to perform verification experiments. On the basis of Nan model, the TCN conversion mathematical model of TC prediction was established. The effects of volume fraction, thermal boundary resistance, thermal contact resistance, aspect ratio and distribution state of fillers on the effective thermal conductivity (ETC) of this PDMS composite were all systematically studied and discussed. In order to verify the accuracy of the model established to predict the TC of PDMS/SCF/GB composite during TCN conversion, a series of experiments were carried out to compare with the model results.
Publication details
Received: 25 Feb 2021
Revised: 10 Apr 2021
Accepted: 10 Apr 2021
Published online: 10 Apr 2021
Article type:
Research Paper
DOI:
10.30919/esmm5f450
Volume:
13
Page:
53-65
Citation:
ES Materials & Manufacturing, 2021, 13, 53-65
Permissions:
Copyright
Number of downloads:
13889
Citation Information:
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Description:
The theory and preparation method discussed in this article provide a new perspective for thermal co....
The theory and preparation method discussed in this article provide a new perspective for thermal conductivity enhancement of polymer composites.
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