Effect of milling parameters on the dispersion characteristics of multi-walled carbon nanotubes in transition metal oxides

Conference of the South African Advanced Materials Initiative 2018

Lephuthing, S.S.^1 ; Okoro, A.M.^1 ; Lesufi, M.^1 ; Ige, O.O.^1 ; Olubambi, P.A.^1

Centre for Nanoengineering and Tribocorrosion, Department of Metallurgy, School of Mining, Metallurgy and Chemical Engineering, University of Johannesburg, South Africa^1

关键词: Ball-to-powder ratios;    Composite powders;    Dispersion characteristics;    High-energy ball milling;    Milling conditions;    Milling parameters;    Milling time;    Uniform dispersions;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/430/1/012002/pdf
DOI  :  10.1088/1757-899X/430/1/012002

来源: IOP

【 摘 要 】

In this research investigation on milling parameters to achieve uniform dispersion of multi-walled carbon nanotubes (MWCNTs) was conducted. High-energy ball milling (HEBM) technique was adopted to disperse 1 wt. % MWCNTs in titanium and manganese oxides with ball to powder ratio (BPR) of 10:1 at 6 and 9 hours milling times. Scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD) were used to characterize the as-received MWCNTs and admixed composite powders. The results indicated that HEBM was an effective route to disperse MWCNTs in transition metal oxides. In addition, the characteristics of admixed powders evidently showed that the increase of milling time effectively dispersed the MWCNTs in titanium and manganese oxide respectively, however deformation of sidewalls of MWCNTs was observed due to harsh milling conditions that resulted on non-sp2 defects in the MWCNTs.