Tuning the Rheology of Nano-Sized Silica Suspensions with Silicon Nitride Particles

GÜRGEN S.

JOURNAL OF NANO RESEARCH, cilt.56, ss.63-70, 2019 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 56
  • Basım Tarihi: 2019
  • Doi Numarası: 10.4028/www.scientific.net/jnanor.56.63
  • Dergi Adı: JOURNAL OF NANO RESEARCH
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.63-70
  • Anahtar Kelimeler: Non-Newtonian rheology, shear thickening, silica, silicon nitride, DILATANT VISCOSITY BEHAVIOR, SHEAR THICKENING FLUIDS, CONCENTRATED SUSPENSIONS, STAB RESISTANCE, ADDITIVES, COLLOIDS
  • Eskişehir Osmangazi Üniversitesi Adresli: Evet

Özet

In this paper, a non-Newtonian fluid was fabricated dispersing nano-sized silica particles in a polyethylene glycol medium. The rheology of the suspension was investigated in a stress-controlled rheometer under increasing shear rate. Based on the rheological measurements, the suspension exhibited shear thickening behavior which gives a drastic viscosity grow with the increase in the shear rate. In order to investigate the role of the micro-sized additive particles on the rheology of silica based suspension, silicon nitride particles were included in the suspension with three different concentrations. The results were discussed in terms of important parameters for the shear thickening mechanism such as critical shear rate, peak viscosity, thickening ratio and initial viscosity. According to the results, shear thickening behavior can be controlled altering the amount of silicon nitride particles in the suspension.