Macrodispersion of multi-walled carbon nanotubes for conductive films.

Department of Nano Mechanics, Korea Institute of Machinery and Materials (KIMM), Daejeon 305-343, Korea.
Journal of Nanoscience and Nanotechnology (Impact Factor: 1.15). 04/2012; 12(4):3408-11.
Source: PubMed

ABSTRACT Understanding of the effect of the multi-walled carbon nanotube (MWCNT) dispersion process on physical properties of MWCNT film is crucial in process optimization of MWCNT film-based products. In the present work, the electrical conduction property of MWCNT films according to various conditions in MWCNT dispersion is investigated. Spectroscopic analysis of dispersed MWCNTs show that the electrical resistance of the MWCNT conductive film is affected by an increase in the electrical contacts between adjacent CNTs due to CNT debundling and physical damage caused by ultrasonic processing. Based on the two conflicting parameters, dispersion guidelines for highly conductive MWCNT film are presented.