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RISS 인기검색어
- 검색키워드
- 저자 : Saiki Yasushi (검색결과 2 건)
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Droplet deformability and emulsion rheology: steady and dynamic behavior
Saiki Yasushi,Prestidge Clive A. The Korean Society of Rheology 2005 Korea-Australia rheology journal Vol.17 No.4
The static and dynamic rheological behavior of concentrated sodium dodecylsulfate (SDS) stabilized, deformability controllable polydimethylsiloxane (PDMS) emulsions is reported and comparisons made with silica (hard sphere) suspensions. Steady-mode measurements indicate 'hard' (viscoelastic) droplets behave as hard spheres, while 'soft' (viscous) droplets induce structural flexibility of the emulsion against shear. Dynamic-mode measurements reveal that viscoelasticity of droplets provides the great magnitude of elasticity for the 'hard' emulsion, while formation of planar films between droplets is the origin of the elasticity of 'soft' emulsions. Combination of steady and dynamic rheological behavior has enabled depiction of droplet structure evolution in relation to the shear stress applied, especially by taking advantage of the normal force that reflects the transient deformation of droplets.
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Droplet deformability and emulsion rheology: steady and dynamic behavior
Clive A. Prestidge,Yasushi Saiki 한국유변학회 2005 Korea-Australia rheology journal Vol.17 No.4
The static and dynamic rheological behavior of concentrated sodium dodecylsulfate (SDS) stabilized, deformability controllable polydimethylsiloxane (PDMS) emulsions is reported and comparisons made with silica (hard sphere) suspensions. Steady-mode measurements indicate hard (viscoelastic) droplets behave as hard spheres, while soft (viscous) droplets induce structural flexibility of the emulsion against shear. Dynamic-mode measurements reveal that viscoelasticity of droplets provides the great magnitude of elasticity for the hard emulsion, while formation of planar films between droplets is the origin of the elasticity of soft emulsions. Combination of steady and dynamic rheological behavior has enabled depiction of droplet structure evolution in relation to the shear stress applied, especially by taking advantage of the normal force that reflects the transient deformation of droplets.
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