Electrophoretic kinetics of nanomullite, nanoSiC and their composite suspensions.

Shakeri, Mohammad Sadegh; Alizadeh, Masoud; Kazemzadeh, Asghar; Ebadzadeh, Touradj; Aghajani, Hossein

In detail characterisation of suspensions including nanomullite, nanosilicon carbide and various percentages of their composites has been studied in this Letter. Mechanism of particle ionisation, alternate pH and surface charge, particle size distribution, zeta potential, current density, electrophoresis movement and kinetics of time–weight curves has been studied, thoroughly. It was illustrated that triethanolamine cannot stabilise powders as well. However, poly-vinyl pyrrolidone could stabilise the particles as well but the particles could not move easily in the presence of applied electrical field due to the lack of enough surface charge. In this case, iodine (I) could be utilised as the preferred surfactant due to good stability and enough surface charge even though it could increase the concentration of free ions and conductivity of particles may be decreased. It was also found that in the case of utilising optimum surfactant, the amount of zeta potential for mullite suspension is more than composite powder and these two have a greater zeta potential than SiC suspension. Last but not least, it was found that the velocity of deposition reduces by increasing the time and its reduction depends on resistance and permittivity of suspension.

MULLITE; ELECTROPHORESIS; NANOSILICON; CARBIDES; IONIZATION (Atomic physics); SURFACE charges; ZETA potential; PARTICLE size distribution

Micro & Nano Letters (Wiley-Blackwell), 2018, Vol 13, Issue 2, p184

1750-0443

Academic Journal

10.1049/mnl.2017.0290