Jang, Ji-un Lee, Hun Su Kim, Jae Woo Kim, Seong Yun Kim, Seong Hun Hwang, Inwoog Kang, Byung Joo Kang, Myung Koo 2024-01-19T19:02:46Z 2024-01-19T19:02:46Z 2021-09-05 2019-10-01 1385-8947 https://pubs.kist.re.kr/handle/201004/119478 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. English ELSEVIER SCIENCE SA INTERFERENCE SHIELDING PROPERTIES ELECTRICAL-CONDUCTIVITY THERMAL-CONDUCTIVITY MECHANICAL-PROPERTIES THEORETICAL APPROACH ENHANCED DISPERSION COMPOSITES NANOCOMPOSITES PERCOLATION FUNCTIONALIZATION Facile and cost-effective strategy for fabrication of polyamide 6 wrapped multi-walled carbon nanotube via anionic melt polymerization of epsilon-caprolactam Article 10.1016/j.cej.2019.05.044 1 CHEMICAL ENGINEERING JOURNAL, v.373, pp.251 - 258 CHEMICAL ENGINEERING JOURNAL 373 251 258 scie scopus 000471682900023 2-s2.0-85065553693 Engineering, Environmental Engineering, Chemical Engineering Article INTERFERENCE SHIELDING PROPERTIES ELECTRICAL-CONDUCTIVITY THERMAL-CONDUCTIVITY MECHANICAL-PROPERTIES THEORETICAL APPROACH ENHANCED DISPERSION COMPOSITES NANOCOMPOSITES PERCOLATION FUNCTIONALIZATION Multi-walled carbon nanotube Anionic polymerization In-situ polymerization Polymer wrapping Composite Electrical conductivity