title: Mechanical and electromagnetic interference shielding Properties of poly(vinyl alcohol)/graphene and poly(vinyl alcohol)/multi-walled carbon nanotube composite nanofiber mats and the effect of Cu top-layer coating.
abstract: We report the mechanical property and electromagnetic interference shielding effectiveness (EMI SE) of poly(vinyl alcohol) (PVA)/graphene and PVA/multi-walled carbon nanotube (MWCNT) composite nanofibers prepared by electrospinning. The metal (Cu) was deposited on the resultant PVA composite nanofibers using metal deposition technique in order to improve the mechanical properties and EMI shielding properties. The resulting PVA composite nanofibers and Cu-deposited corresponding nanofibers were characterized by field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM) and wide angle X-ray diffraction (WAXD). Tensile tests were performed on the PVA/graphene and PVA/MWCNT composite nanofibers. The tensile strength of the PVA/graphene and PVA/MWCNT composite nanofibers was found to be 19.2 +/- 0.3 MPa at graphene content - 6.0 wt% and 12.2 +/- 0.2 MPa at MWCNT content - 3.0 wt%, respectively. The EMI SE of the Cu-deposited PVA/graphene composite nanofibers was significantly improved compared to pure PVA/graphene composite nanofibers, and also depended on the thickness of Cu metal layer deposited on the PVA composite nanofibers.
authors.affiliation: Faculty of Textile Science and Technology, Nano Fusion Technology Research Group, Interdisciplinary Graduate School of Science and Technology, Shinshu University, Ueda, Nagano 386-0015, Japan.
authors.forename: Kazushige
authors.initials: K
authors.lastname: Fujimori
authors.forename: Mayakrishnan
authors.initials: M
authors.lastname: Gopiraman
authors.forename: Han-Ki
authors.initials: HK
authors.lastname: Kim
authors.forename: Byoung-Suhk
authors.initials: BS
authors.lastname: Kim
authors.forename: Ick-Soo
authors.initials: IS
authors.lastname: Kim