Electrorheology of chitosan polysaccharide suspensions in soybean oil

Sung, Jang Hyun; Choi, Hyoung Jin; Sohn, Jeong‐In

doi:10.1007/s00396-003-0909-y

Cited by 27 publications

(21 citation statements)

References 34 publications

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“…It was reported that this universal yield stress equation quite agree with various ER system [15,16]. Note that recently this analysis has been employed into the magnetorheological fluid successfully [17].…”

Section: Universal Yield Stress Equationsupporting

confidence: 67%

Comment on “Universal yield stress equation for transient response of zeolite based electrorheological fluid”

Park

Choi

2010

Journal of Colloid and Interface Science

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Section: Universal Yield Stress Equationsupporting

confidence: 67%

Comment on “Universal yield stress equation for transient response of zeolite based electrorheological fluid”

Park

Choi

2010

Journal of Colloid and Interface Science

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“…Analogous, shear thinning viscometric behavior has been previously reported for other ER fluids, such as polyaniline, [7] poly(aniline-co-ethoxyaniline), [46] and chitosan polysaccharide. [15] Optical micrographs of the 5 wt.-% highly doped PTAA suspension (HPT5) at increasing electric field strengths under quiescent conditions are shown in Figure 8. It can be seen clearly that the particles are randomly distributed at zero field, whereas on application of the electric field, a transition to an organized fibrillar structure occurs due to the long-range interacting electrostatic polarization forces.…”

Section: Resultsmentioning

confidence: 99%

“…[2][3][4][5] Typically, the steady-state rheological properties have been investigated for most ER fluids. [6][7][8][9][10][11][12][13][14] The steady-state rheological response in shearing flows is commonly modeled as a Bingham fluid, [15,16] with an electric field dependent yield stress, t y (E 0 ),…”

Section: Introductionmentioning

confidence: 99%

Scaling of Yield Stress of Polythiophene Suspensions under Electric Field

Chotpattananont

Sirivat

Jamieson

2004

Macro Materials & Eng

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Summary: Electrorheological properties in steady shear of perchloric acid doped poly(3‐thiopheneacetic acid), PTAA, particles in silicone oil were investigated to determine the effects of field strength, particle concentration, doping degree (conductivity values), operating temperature and nonionic surfactant. The PTAA/silicone oil suspensions show the typical ER response of Bingham flow behavior upon the application of electric field. The yield stress increases with electric field strength, E, and particle volume fraction, ϕ, according to a scaling law of the form, τy ∝ Eα · ϕγ. The scaling exponent α approaches the value of 2, predicted by the polarization model, as the particle volume fraction decreases and when the doping level of the particles decreases. The scaling exponent γ tends to unity, as predicted by the polarization model, when the electric field strength is low. The yield stress under electric field initially increases with temperature up to 25 °C, and then levels off. At electric fields above of 1.5 kV/mm, the yield stress increases significantly by up to 50% on addition of small amounts of a nonionic surfactant.

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“…Typically, the steady-state rheological properties have been investigated for most ER fluids [6][7][8][9][10][11][12][13][14]. The steady-state rheological response in shearing flows is commonly modeled as a Bingham fluid [15,16], with an electric field dependent yield stress, τ y (E o ),…”

Section: Introductionmentioning

confidence: 99%

Yield stress of perchloric-acid-doped polythiophene/silicone oil suspensions

2004

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Electrorheological properties in steady shear of perchloric acid doped poly(3-thiophene acetic acid), PTAA, particles in silicone oil were investigated to determine the effects of field strength, particle concentration, doping degree (conductivity values), operating temperature, and nonionic surfactant. The PTAA/silicone oil suspensions show the typical ER response of Bingham flow behavior upon the application of electric field. The yield stress increases with electric field strength, E, and particle volume fraction, φ, according to a scaling law of the form, τ y ∝ E α φ γ . The scaling exponent α approaches the value of 2, predicted by the polarization model, as the particle volume fraction decreases and when the doping level of the particles decreases. The scaling exponent γ tends to unity, as predicted by the polarization model, when the electric field strength is low. The yield stress under electric field initially increases with temperature up to 25 o C, and then levels off. At electric fields above of 1.5 kV/mm, the yield stress increases significantly by up to 50% on addition of small amounts of a nonionic surfactant.

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Electrorheology of chitosan polysaccharide suspensions in soybean oil

Cited by 27 publications

References 34 publications

Comment on “Universal yield stress equation for transient response of zeolite based electrorheological fluid”

Comment on “Universal yield stress equation for transient response of zeolite based electrorheological fluid”

Scaling of Yield Stress of Polythiophene Suspensions under Electric Field

Yield stress of perchloric-acid-doped polythiophene/silicone oil suspensions

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