Rheological characterization of poly(ethylene oxide) solutions of different molecular weights

Ebagninin, Koblan Wilfried; Benchabane, Adel; Bekkour, Karim

doi:10.1016/j.jcis.2009.03.014

Cited by 189 publications

(190 citation statements)

References 27 publications

Supporting

Mentioning

149

Contrasting

Unclassified

Order By: Relevance

“…[19][20][21][22][23][24] like the colloid concentration, c, expressed in g L À1 to reduced quantities like the colloid volume fraction, f, typically used in theoretical descriptions. To this end, we measure scattering intensities of a colloid/salt concentration series with SAXS, as shown in Fig.…”

Section: Colloid Characterizationmentioning

confidence: 99%

Phase behaviour of colloids with short-range repulsions plus nonadsorbing polymer chains

Gruijthuijsen¹,

Tuinier²,

Brader³

et al. 2013

Soft Matter

View full text Add to dashboard Cite

The colloidal gas-liquid phase behaviour has been studied for aqueous mixtures of well-defined spherical particles with shortranged repulsions mixed with relatively monodisperse poly(ethylene oxide) polymers. We show that our set of experimental phase diagrams are in quantitative agreement with theoretical predictions using generalized free volume theory [G. J. Fleer and R. Tuinier, Phys. Rev. E, 2007, 76, 041802]. The determination of the equilibrium composition of coexisting phases reveals qualitative deviations between the two, for which we propose a tentative explanation.

show abstract

Section: Colloid Characterizationmentioning

confidence: 99%

Phase behaviour of colloids with short-range repulsions plus nonadsorbing polymer chains

Gruijthuijsen¹,

Tuinier²,

Brader³

et al. 2013

Soft Matter

View full text Add to dashboard Cite

show abstract

“…In a detailed study using high-speed photography, Padron et al (2013) explored the effects of several controllable parameters on fibre trajectory and final fibre radius, finding for example that both increasing spinneret angular velocity and decreasing polymer concentration result in thinner fibres. Although an experimental approach seems to be promising in uncovering the general effects of a number of parameters on nanofibre formation, this method is time consuming and the large number of the parameters involved makes it (Ebagninin, Benchabane & Bekkour 2009) at relevant polymer concentrations which have been used for nanofibre fabrication experiments (Padron et al 2013).…”

mentioning

confidence: 99%

Regularized string model for nanofibre formation in centrifugal spinning methods

et al. 2017

View full text Add to dashboard Cite

We develop a general regularized thin-fibre (string) model to predict the properties of non-Newtonian fluid fibres generated by centrifugal spinning. In this process the fibre emerges from a nozzle of a spinneret that rotates rapidly around its axis of symmetry, in the presence of centrifugal, Coriolis, inertial, viscous/shear-thinning, surface tension and gravitational forces. We analyse the effects of five important dimensionless groups, namely, the Rossby number (Rb), the Reynolds number (Re), the Weber number (We), the Froude number (Fr) and a power-law index (m), on the steady state trajectory and thinning of fibre radius. In particular, we find that the gravitational force mainly affects the fibre vertical angle at small arc lengths as well as the fibre trajectory. We show that for small Rb, which is the regime of nanofibre formation in centrifugal spinning methods, rapid thinning of the fibre radius occurs over small arc lengths, which becomes more pronounced as Re increases or m decreases. At larger arc lengths, a relatively large We results in a spiral trajectory regime, where the fibre eventually recovers a corresponding inviscid limit with a slow thinning of the fibre radius as a function of the arc length. Viscous forces do not prevent the fibre from approaching the inviscid limit, but very strong surface tension forces may do so as they could even result in a circular trajectory with an almost constant fibre radius. We divide the spiral and circular trajectories into zones of no thinning, intense thinning and slow or ceased thinning, and for each zone we provide simple expressions for the fibre radius as a function of the arc length.

show abstract

“…Le mode préparatoire des suspensions à base d'argile à été établi dans des études antérieures pour obtenir des résultats reproductibles (Benchabane, 2006 ;Ebagninin et al, 2006aEbagninin et al, , 2009). Une suspension de bentonite sans additif (suspension de référence ou de base) est préparée par dispersion de la poudre de bentonite dans de l'eau distillée à une concentration de 5%.…”

Section: Mode Préparatoire Et Méthodes De Mesureunclassified

“…Une étude antérieure (Ebagninin et al, 2009) a permis de mettre en évidence le comportement rhéologique du polyéthylène oxyde (PEO).…”

Section: Introductionunclassified

Influence du polyéthylène oxyde (PEO) de différentes masses moléculaires sur les propriétés rhéologiques des suspensions d’argile

Ebagninin¹,

Benchabane²,

Bekkour³

2013

Int. J. Bio. Chem. Sci

View full text Add to dashboard Cite

Rheological characterization of poly(ethylene oxide) solutions of different molecular weights

Cited by 189 publications

References 27 publications

Phase behaviour of colloids with short-range repulsions plus nonadsorbing polymer chains

Phase behaviour of colloids with short-range repulsions plus nonadsorbing polymer chains

Regularized string model for nanofibre formation in centrifugal spinning methods

Influence du polyéthylène oxyde (PEO) de différentes masses moléculaires sur les propriétés rhéologiques des suspensions d’argile

Contact Info

Product

Resources

About