Effects of carbon fiber modification with multiwall CNT on the electrical conductivity and EMI shielding effectiveness of polycarbonate/carbon fiber/CNT composites
- Authors
- Jang, Myung Geun; Ryu, Seung Chan; Juhn, Kyu Jin; Kim, Sung Kyu; Kim, Woo Nyon
- Issue Date
- 10-4월-2019
- Publisher
- WILEY
- Keywords
- carbon fiber; electrical conductivity; EMI shielding effectiveness; polymer composite
- Citation
- JOURNAL OF APPLIED POLYMER SCIENCE, v.136, no.14
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF APPLIED POLYMER SCIENCE
- Volume
- 136
- Number
- 14
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/66028
- DOI
- 10.1002/app.47302
- ISSN
- 0021-8995
- Abstract
- The effect of carbon fiber (CF) modification with multiwall carbon nanotube (CNT) on the electrical, mechanical, and rheological properties of the polycarbonate (PC)/CF/CNT composite was investigated. The CF and multiwall CNT (MWCNT) were treated with sulfuric acid and nitric acid (3:1 wt %) mixture, to modify the CF with the CNT. For the PC with acid-treated CNT (a-CNT) modified acid-treated CF (a-CF) (PC/a-CF/a-CNT) composite, the electrical conductivity, and the electromagnetic interference shielding effectiveness (EMI SE) showed the highest values, compared with those of the PC/a-CF and PC/a-CF/CNT composites. The EMI SE of the PC/a-CF (10 wt %)/a-CNT (0.5 wt %) composite was found to be 26 (dB at the frequency of 10.0 GHz, and the EMI SE was increased by 91.2%, compared to that of the PC/a-CF composite at the same amount of total filler content. Among the composites studied in this work, the PC/a-CF/a-CNT composite also showed the highest values of relative permittivity (epsilon(r)) and dielectric loss factor. The above results suggest that the CF modification with the a-CNT significantly affected the electrical conductivity and EMI SE of the composite, and the hybrid fillers of the a-CNT and a-CF resulted in good electrical pathways in the PC/a-CF/a-CNT composite. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47302.
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