Shear-induced structure change in shear-banding of a wormlike micellar solution in concentric cylinder flow

2016 ◽  
Vol 60 (5) ◽  
pp. 1019-1029 ◽  
Author(s):  
Masatoshi Ito ◽  
Yumiko Yoshitake ◽  
Tsutomu Takahashi
Keyword(s):  
Micellar Solution ◽  
Shear Banding ◽  
Structure Change ◽  
Concentric Cylinder ◽  
Cylinder Flow ◽  
Shear Induced Structure ◽  
Induced Structure

scholarly journals Rheological properties of hydroxypropylmethyl cellulose/sodium dodecylsulfate mixtures

2014 ◽  
Vol 79 (4) ◽  
pp. 457-468 ◽  
Author(s):  
Jaroslav Katona ◽  
Sandra Njaradi ◽  
Verica Sovilj ◽  
Lidija Petrovic ◽  
Brankica Marceta ◽  
...  
Keyword(s):  
Rheological Properties ◽  
Sodium Dodecylsulfate ◽  
Shear Thinning ◽  
Cellulose Ether ◽  
Flow Profile ◽  
Hydroxypropylmethyl Cellulose ◽  
Shear Rates ◽  
Newtonian Liquids ◽  
Shear Induced Structure ◽  
Induced Structure

Rheological properties of mixtures of hydroxypropylmethyl cellulose (HPMC), a nonionic associative cellulose ether, and sodium dodecylsulfate (SDS), an anionic surfactant, were investigated by viscosity measurements performed at different shear rates (0.1-6000 s-1). HPMC/SDS mixtures containing different concentrations of SDS (CSDS=0.00-3.50 % w/w) and HPMC concentrations which corresponded to the overlap parameter c/c*=3, 6, and 12 were prepared. All HPMC/SDS mixtures were found to be shear-thinning when examined in a low-end-to mid-range of the applied shear rates. The degree of shear-thinning, n, and viscosity of the mixtures were influenced by composition of HPMC/SDS mixtures and HPMC-SDS complex formation. The changes in n ranged from values typical for highly shear thinning to almost perfectly Newtonian liquids, and were more pronounced as c/c* was increased from 3 to 6 and 12. A change in flow profile and a buildup of the first normal stress difference (N1) was observed in HPMC/SDS mixtures with c/c*=6 and 12 and CSDS 0.55-1.00 % and 0.55-2.50 %, respectively, when a critical shear rate, crit. was exceeded, suggesting that a shear-induced structure formation in the mixtures took place.

scholarly journals S051013 Flow-Induced Structure Change of Aqueous Solution of Polymer in an Abrupt Contraction Channel

2013 ◽  
Vol 2013 (0) ◽  
pp. _S051013-1-_S051013-4
Author(s):  
Taisuke SATO ◽  
Kazunori YASUDA ◽  
Yukiharu IWAMOTO ◽  
Motosuke SOGO ◽  
Takatsune NARUMI
Keyword(s):  
Aqueous Solution ◽  
Structure Change ◽  
Abrupt Contraction ◽  
Induced Structure
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