Electrical conductivity and electromagnetic interference shielding characteristics of multiwalled carbon nanotube filled polyurethane composite films

Autor:	Anh Son Hoang
Rok vydání:	2011
Předmět:	Nanotube Materials science Transmission electron microscopy Scanning electron microscope Electromagnetic shielding Composite number Shielding effect General Materials Science Electrical and Electronic Engineering Conductivity Composite material Ball mill Industrial and Manufacturing Engineering
Zdroj:	Advances in Natural Sciences: Nanoscience and Nanotechnology. 2:025007
ISSN:	2043-6262
DOI:	10.1088/2043-6262/2/2/025007
Popis:	Multiwalled carbon nanotubes (MWCNTs) were homogeneously dispersed in a pure polyurethane resin by grinding in a planetary ball mill. The structure and surface morphology of the MWCNTs and MWCNT/polyurethane composites were studied by filed emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) methods. The electrical conductivity at room temperature and electromagnetic interference (EMI) shielding effectiveness (SE) of the composite films with different MWCNT loadings were investigated and the measurement of EMI SE was carried out in a frequency range of 8–12 GHz (X-band). The experimental results show that with a low MWCNT concentration the composite films could achieve a high conductivity and their EMI SE has a strong dependence on MWCNT content. For the composite films with 22 wt% of MWCNTs, the EMI SE attained an average value of 20 dB, so that the shielding effect reduced the penetrating power to 1%.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b5e51ab77b440f542fd6f2d3189b1024 https://doi.org/10.1088/2043-6262/2/2/025007 Zobrazit plný text záznamu