| Autor: |
Zhijun Liu, Chao Dong, Wei Wei, Jie Huang, Yunze Chen, Zhiyi Li |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
The Journal of Supercritical Fluids. 180:105445 |
| ISSN: |
0896-8446 |
| DOI: |
10.1016/j.supflu.2021.105445 |
| Popis: |
A novel Pickering emulsion-based method is proposed to fabricate conductive polymer composites based on poly(p-phenylene oxide) with superior electrical performance and thermal stability. To overcome the incapability of separating high-boiling-point solvent toluene from the emulsion by traditional solvent evaporation method, supercritical CO2 was utilized as an anti-solvent and extraction solvent. Results showed that hollow microparticles coated by carbon black were formed with an average particle size of 24.88 µm. After hot-pressing at 260 °C, segregated networks were established and the composites showed a percolation threshold of 1.85 wt%. The specimen with a carbon black loading of 9.1 wt% showed a conductivity of 78.44 ± 3.96 S/m and a tensile strength of 30.8 ± 2.8 MPa, with superior thermomechanical performance (Young’s Modulus of 2203.9 at 200 °C) and insignificant positive temperature coefficient effect (an increase in resistivity by 57.9% up to 300 °C). |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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Full Text from ScienceDirect