Deagglomerated multi-walled carbon nanotubes (MWCNTs) were dry coated onto the Surfaces of polyethylene oxide powder particles by magnetic assisted impact coater (M Lambda IC). The deagglomeration of the tightly agglomerated MWCNTs was carried Out using two procedures: rapid expansion of supercritical suspension (RESS) of MWCNTs and M, and high-intensity ultrasonic agitation of a suspension of MWCNTs in acetone, using an ultrasonic probe. FESEM images show that the high-intensity ultrasonic probe was more effective in deagglomerating the agglomerated MWCNTs than the RESS method. Furthermore, it was found that the extent of PEO particle Surface coverage by MWCNTs greatly depends on the extent of deagglomeration. (c) 2007 Elsevier B.V. All fights reserved.