Facile and cost-effective strategy for fabrication of polyamide 6 wrapped multi-walled carbon nanotube via anionic melt polymerization of epsilon-caprolactam
- Authors
- Jang, Ji-un; Lee, Hun Su; Kim, Jae Woo; Kim, Seong Yun; Kim, Seong Hun; Hwang, Inwoog; Kang, Byung Joo; Kang, Myung Koo
- Issue Date
- Oct-2019
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Multi-walled carbon nanotube; Anionic polymerization; In-situ polymerization; Polymer wrapping; Composite; Electrical conductivity
- Citation
- CHEMICAL ENGINEERING JOURNAL, v.373, pp.251 - 258
- Indexed
- SCIE
SCOPUS
- Journal Title
- CHEMICAL ENGINEERING JOURNAL
- Volume
- 373
- Start Page
- 251
- End Page
- 258
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/2863
- DOI
- 10.1016/j.cej.2019.05.044
- ISSN
- 1385-8947
- Abstract
- There is a growing demand for the development of a melt process-based nanocomposite manufacturing process capable of minimizing the incorporation of expensive carbon nanotubes (CNTs) by inducing a uniform dispersion of multiwalled CNTs (MWNTs). In this study, we proposed a nanocomposite manufacturing process that includes both physical particle mixing using high-speed rotation and anionic polymerization of e-caprolactam (CL) to induce a uniform dispersion of MWNTs. MWNTs were uniformly dispersed by powder mixing and then wrapped with polyamide 6 polymers by in-situ polymerization of CL. The synergistic effect of the two sub-processes resulted in an enhanced dispersion of MWNTs and prevented aggregation of the MWNTs. The composites fabricated by the proposed process exhibited electrical conductivities of 4.49 x 10(-5) S/m and 1.45 x 10 S/m at 1 wt% and 3 wt% MWNTs, respectively, indicating that by applying the proposed process it is possible to incorporate a smaller amount of MWNT to achieve electrical conductivities applicable for electrostatic discharge (ESD) (> 1 X 10(-5) S/m) and electromagnetic interference shielding effectiveness (EMI SE) (> 10 S/m) applications. An ESD chip tray and EMI SE mobile phone case were fabricated using the prepared composite, and it was verified that the ESD and EMI SE performances can be realized.
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