Thermally conductive polymeric composites incorporating 3D MWCNT/PEDOT:PSS scaffolds
| Autor: | Cai Wan Chang-Jian, Po Yu Chen, Bo Cheng Ho, Jen Hsien Huang, Yu-Sheng Hsiao, Kuen Chan Lee, Er Chieh Cho |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Conductive polymer
Materials science Polydimethylsiloxane Mechanical Engineering Thermal resistance Composite number 02 engineering and technology Carbon nanotube 010402 general chemistry 021001 nanoscience & nanotechnology Thermal conduction 01 natural sciences Industrial and Manufacturing Engineering 0104 chemical sciences law.invention chemistry.chemical_compound Thermal conductivity chemistry PEDOT:PSS Mechanics of Materials law Ceramics and Composites Composite material 0210 nano-technology |
| Zdroj: | Composites Part B: Engineering. 136:46-54 |
| ISSN: | 1359-8368 |
| DOI: | 10.1016/j.compositesb.2017.10.004 |
| Popis: | Although several types of stabilizers have been investigated recently to disperse carbon nanotubes (CNTs), the most common of them are thermal insulators that increase the thermal resistance and hinder the heat conduction across the CNT junctions. In this study, we dispersed multi-wall carbon nanotubes (MWCNTs) using the conducting polymer poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) as a functional surfactant. Upon sonication, PEDOT:PSS covered the surfaces of the MWCNTs, thereby preventing their π-stacking and increasing their dispersion. Moreover, PEDOT:PSS acted as a thermally conductive bridge that connected the MWCNTs and decreased their thermal resistance. We employed a freeze-drying method to prepare MWCNT/PEDOT:PSS composites with hierarchical microstructures. After introducing polydimethylsiloxane (PDMS) into the MWCNT/PEDOT:PSS foam, the thermal conductivity of the MWCNT/PEDOT:PSS and PDMS composite reached 1.16 W/mK—over 550% higher than that of pure PDMS. These results suggest that such PDMS composites might be useful as thermal interface materials for thermal management in electronic and photonic applications. |
| Databáze: | OpenAIRE |
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