Abstract
With the rapid development of electronic information technology, traditional metal conductive materials can no longer satisfy the needs of a wider industry. Poly(butylene succinate)/multiwalled carbon nanotubes (PBS/CNT) conductive polymer nanocomposites with varied CNT content were prepared by a HAAKE torque rheometer. The addition of CNT significantly improved the crystallization, viscoelasticity, and mechanical properties as well as thermal and electrical conductivity. Conductivity of the PBS/CNT nanocomposite with 5 wt% CNT increased from 8.23 × 10–15 S m−1 of pure PBS to 33.3 S m−1, an increase of 16 orders of magnitude. Moreover, the electrical percolation threshold \({\mathrm{\varphi }}_{\mathrm{c}}\) of the PBS/CNT nanocomposites was 2.8 wt% and the critical index was 1.56, showing that the conductive network structure was between 2 and 3D and 2D network structure dominated. To further improve the conductivity, microcellular foams were successfully fabricated by batch foaming with supercritical fluids (scCO2). The electrical conductivity of the PBS/CNT foam with 5 wt% CNT reached 67.8 S m−1 and it was 104% higher than the corresponding solid nanocomposite.
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Acknowledgements
This work was supported by National Natural Science Foundation of China (No. 51573063 and No. 21174044), Scientific Research Foundation of Fujian University of Technology (GY-Z19048), Natural Science Foundation of Fujian Province (2020J05190 and 2020J02007), Open Fund of Key Laboratory of National Forestry and Grassland Administration/Beijing for Bamboo and Rattan Science and Technology (ICBR-2020-14), Open Fund of Key Laboratory of Polymer Materials and Products of Universities in Fujian (Fujian University of Technology (KF-C19011).
Funding
This work was supported by Natural Science Foundation of Fujian Province (2020J05190 and 2020J02007), Open Fund of Key Laboratory of National Forestry and Grassland Administration/Beijing for Bamboo and Rattan Science and Technology (ICBR-2020-14).
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Huang, A., Song, X., Liu, F. et al. Supercritical Fluids-Assisted Processing Using CO2 Foaming to Enhance the Dispersion of Nanofillers in Poly(butylene succinate)-Based Nanocomposites and the Conductivity. J Polym Environ 30, 3063–3077 (2022). https://doi.org/10.1007/s10924-022-02389-2
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DOI: https://doi.org/10.1007/s10924-022-02389-2