Results 171 to 180 of about 7,836 (232)

Thixotropic property in pharmaceutical formulations

Journal of Controlled Release, 2009
This review focuses on the characterization of the thixotropic property, the factors affecting the thixotropic property and its pharmaceutical applications. These factors include pH, temperature, polymer concentrations, polymer modification, polymer combinations, and addition of cations or excipients.
Chi H Lee, Yugyung Lee
exaly   +3 more sources

Study of the thixotropic behaviors of ferrofluids

Soft Matter, 2018
Ferrofluids exhibit significant thixotropic behaviors under a magnetic field, which are induced by the presence and evolution of different microstructures.
Zhenkun Li, Decai Li, Yibiao Chen, Hongchao Cui   +3 more
openaire   +3 more sources

Dissociation of thixotropic clay gels

Physical Review E, 2002
Laponite dispersions in water, at moderate ionic strength and high pH, are thixotropic: depending on previous history, they can be fluids or gels. The mechanisms of the fluid-gel and gel-fluid transitions have been examined through ionic analysis of the aqueous phase, static light, and small-angle neutron scattering, rheological experiments, and ...
Martin, Céline, Pignon, Frédéric, Piau, Jean-Michel, Magnin, Albert, Lindner, Peter, Cabane, Bernard   +5 more
openaire   +3 more sources

Thixotropic Twin‐Dendritic Organogelators

Chemistry – A European Journal, 2008
AbstractTwin‐dendritic organogelators have been prepared through selective functionalization of N‐(3‐aminopropyl)‐1,3‐propanediamine (APPDA) with self‐assembling dendrons by using 1,1′‐carbonyldiimidazole (CDI). Subsequent modification of the APPDA linker provided an additional degree of structural diversity by which to tailor the gelator self‐assembly
Percec, Virgil, Peterca, Mihai, Yurchenko, Michael E., Rudick, Jonathan G., Heiney, Paul A.   +4 more
openaire   +4 more sources

Studies in thixotropic gelation - I—The mechanism of thixotropic gelation

Proceedings of the Royal Society of London. Series A - Mathematical and Physical Sciences, 1936
Abstract Thixotropic gels can be converted into sols by applying a suitable mechanical stress, e. g., by shaking, and set to gels again at a definite rate when the stress is removed. We define a gel as any system consisting of a disperse phase in a liquid dispersion medium, having a measurable rigidity.
J. L. Russell, Eric Keightley Rideal
openaire   +1 more source

Thixotropic Strength and Thixotropic Criteria in Semi-Solid Processing

Solid State Phenomena, 2008
Thixotropy is essential to semi-solid processing, and because of it the semi-solid material is characterized by ‘shear shinning’. Here, thixotropic strength and thixotropic criteria in semi-solid processing are put forward based on related theories and experiments, and thixotropic mechanism and its influencing factors are also investigated. The results
W.C. Keung, Y.F. Lee, Wei Wei Shan, Shou Jing Luo   +3 more
openaire   +1 more source

PARTICLE SHAPE IN THIXOTROPIC SUSPENSIONS

Canadian Journal of Chemistry, 1951
Several equations have been proposed that predict the shape of suspended particles when the viscosity of a suspension of known concentration is measured. These are not applicable to suspensions showing thixotropy, owing to the dependence of the measured viscosity on the shear rate used. However, by using viscosity values that have been extrapolated to
A F, SIRIANNI, G B, MOSES, I E, PUDDINGTON   +2 more
openaire   +2 more sources