Stress Oscillations in Co-Solvent Nanoparticle–Polymer Suspensions Subjected to Constant Shear Rate

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Hiroaki Koga¹  Hiroyuki Kage¹  Yoshihide Mawatari¹  Masato Yamamura¹ 

[1] Department of Applied Chemistry, Kyushu Institute of Technology

关键词: Colloid;    Suspension;    Shear-Thickening;    Stress;    Oscillation;   

DOI  :  10.1252/jcej.13we032

来源: Maruzen Company Ltd

【 摘 要 】

References(17)Cited-By(1)We examined the shear stress in toluene-based suspensions of titanium dioxide nanoparticles/poly(vinylacetate) subjected to constant shear rates. The stress exhibited periodic oscillations at shear rates in a certain range. The amplitude of these oscillations first increased and then decreased with increasing ethanol concentration in the suspensions, indicating a transient stress response that was tunable by utilizing the solvent composition. In the oscillation mode, the suspensions showed a viscoelastic, shear-thickening behavior. The composition-dependent stress oscillation is discussed on the basis of hydrodynamic and depletion attractions among the particles.

【 授权许可】

Unknown