Can I read Steric Stabilization of Inorganic Suspensions in Carbon Dioxide on EtoBox?

Steric Stabilization of Inorganic Suspensions in Carbon Dioxide by Lourdes Calvo; Justin D. Holmes; Matthew Z. Yates; Keith P. Johnston is a Engineering article available to read on EtoBox.

What is Steric Stabilization of Inorganic Suspensions in Carbon Dioxide about?

Nonionic and ionic surfactants with poly(fluoroacrylate), poly(fluoroether) or poly(dimethyl siloxane) tails stabilize hydrophilic and hydrophobic silica suspensions in carbon dioxide for hours as shown with turbidimetry. For hydrophilic silica, surfactant head groups with carboxylate, carboxylic acid, styrene and ethylene oxide functionalities adsorb to silica, in part due to hydrogen bonding to silanol groups. As density, and thus the solvent quality, are lowered an abrupt 'critical flocculation density' is observed for silica stabilized by poly(styrene-b-fluoroacrylate) (M n values: 4.5 k-b-24.5 k). This loss in steric stabilization is observed just above the cloud-point density of poly(fluoroacrylate) in bulk CO 2 , due to collapse of the stabilizer chains. In contrast, the loss in stabilization is continuous for perfluoropolyether COO-NH 4 + (2500 g/mol ) due to its low molecular weight.

Who reads Steric Stabilization of Inorganic Suspensions in Carbon Dioxide?

Author

Lourdes Calvo; Justin D. Holmes; Matthew Z. Yates; Keith P. Johnston

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0896-8446)

Published

2000

Language

EN

Field

Engineering (Physical Sciences)