High-thermal conductivities of epoxy composites via p-phenylenediamine interfacial modification and process intensification |
| |
| Authors: | Di Bao Fei Xu Yexiang Cui Sicheng Yuan Xiguang Zhang Yanji Zhu Yueyang Gao Huaiyuan Wang |
| |
| Affiliation: | 1. College of Chemistry and Chemical Engineering, Northeast Petroleum University, Daqing, China;2. School of Chemical Engineering and Technology and State Key Laboratory for Chemical Engineering, Tianjin University, Tianjin, China;3. College of Chemistry and Chemical Engineering, Northeast Petroleum University, Daqing, China
Tianjin Key Lab Composite & Functional Materials, School of Materials Science and Engineering, Tianjin University, Tianjin, China |
| |
| Abstract: | High loadings of fillers are usually needed to achieve high-thermal conductivity (TC) of polymer-based composites, which inevitably sacrifices processability and meanwhile causes high-cost. Therefore, it is of great significance to achieve high-TC composites under low-filler loading. Here, a novel p-phenylenediamine (PPD) modified expanded graphite (EG-PPD)/epoxy (EP) composite with high TC and low-filler content was successfully prepared via pre-dispersion and vacuum assisted mixing strategy. With the improved interfacial compatibility between EG and EP by PPD, the prepared EG-PPD/EP composite exhibited excellent thermal management performance, resulting in the TC of which reached 4.00 W·m?1·K?1 with only 10 wt% (5.59 vol%) of EG-PPD, which is approximately 19 times higher than that of pure EP. Meantime, the interface thermal resistance of EG-PPD/EP composite between EG-PPD and EP is reduced by 33% compared with EG/EP composite. This composite with excellent TC property is expected to be used in thermal management field. |
| |
| Keywords: | composites surfaces and interfaces thermal properties thermosets |
|
|
