Green modification of single-walled carbon nanotubes dispersion with good dispersibility and long storage stability

Highly homogeneous and stable single-walled carbon nanotubes dispersion modified by polyvinylpyrrolidone and alkanolamine in water

“…From an industrial perspective, it is fast and easy to measure the optical transmittance of carbon materials while giving a repetitive and quick indication of dispersion quality. 23,27 Fig. 2a shows the transmittance spectroscopy of diluted commercial SWCNTs, modified P-SWCNTs-0.5%, 0.6%, 0.7% and PA-SWCNTs with incident light wavelength ranging from 200 nm to 800 nm.…”

“…As reported in previous studies, the greater absorbance proved the better dispersibility because the intensity of absorbance is related to the number of nanoparticles contained in the unit volume of the dispersion. 23 …”

“…The zeta potential is an important parameter that characterizes the surface properties of electrostatically stabilized nanomaterials in aqueous solution. 23 Fig. 4 shows the relation between zeta potential and SWCNTs dispersion modified by different dispersant.…”