Detachment of colloidal hydrous oxide spheres from flat solids exposed to flow 4. Effect of polyelectrolytes

Abstract Pretreatment of cellulose and glass surfaces with cationic polyelectrolytes greatly increased the force needed to detach titanium hydrous oxide spheres. The force of adhesion was as much as 30 times greater than the highest values obtained in the absence of polymers. The hydrodynamic shear stress required for detachment increased with pretreatment level, molecular mass, and decreasing cationic charge of the polymer. The results are consistent with the presence of polymeric bridging between the solids.

[1]  N. Jaffrezic‐Renault,et al.  Surface and diffuse-layer charge at the TiO2—electrolyte interface , 1982 .

[2]  M. Hubbe.  Detachment of colloidal hydrous oxide spheres from flat solids exposed to flow 1. Experimental system , 1985 .

[3]  Martin A. Hubbe,et al.  Detachment of colloidal hydrous oxide spheres from flat solids exposed to flow 2. Mechanism of release , 1985 .

[4]  M. Hubbe.  Detachment of colloidal hydrous oxide spheres from flat solids exposed to flow 3. Forces of adhesion , 1987 .

[5]  H. R. Byers.  NUCLEATION IN THE ATMOSPHERE , 1965 .

[6]  K. Mühle.  Particle adhesion in coagulation and bridging flocculation , 1985 .

[7]  F. Onabe.  Interfacial properties of polyelectrolyte–cellulose systems. III. Theoretical model for the electrokinetic behavior of cellulose fibers with adsorbed monolayers of cationic polyelectrolyte , 1979 .

[8]  B. Derjaguin,et al.  Theory of the stability of strongly charged lyophobic sols and of the adhesion of strongly charged particles in solutions of electrolytes , 1993 .

[9]  F. Vader,et al.  Measurement of polymer bridging forces in liquid/liquid systems , 1981 .

[10]  R. Stratton,et al.  The role of polyelectrolyte charge density and molecular weight on the adsorption and flocculation of colloidal silica with polyethylenimine , 1976 .

[11]  G. J. Fleer,et al.  Polymer adsorption and its effect on the stability of hydrophobic colloids. II. The flocculation process as studied with the silver iodide-polyvinyl alcohol system , 1974 .

[12]  T. Dąbroś,et al.  NoteFlexible bonds between latex particles and solid surfaces , 1983 .

[13]  J. Kitchener,et al.  The strength of aggregates formed in flocculation , 1978 .

[14]  D. Bagster,et al.  A model of floc strength under hydrodynamic forces , 1975 .

[15]  J. Visser.  On Hamaker constants: A comparison between Hamaker constants and Lifshitz-van der Waals constants , 1972 .

[16]  T. G. M. Ven.  Effects of polymer bridging on selective shear flocculation , 1981 .

[17]  J. Mulder,et al.  Adsorbed polymers in aqueous media the relation between zeta potential, layer thickness and ionic strength , 1985 .

[18]  J Gregory,et al.  The effect of cationic polymers on the colloidal stability of latex particles , 1976 .

[19]  R. Luecke,et al.  Mechanisms of Deaggregation for Clay-Polymer Flocs in Turbulent Systems , 1980 .

[20]  D. E. Yates,et al.  Titanium dioxide–electrolyte interface. Part 2.—Surface charge (titration) studies , 1980 .

[21]  J. Kitchener.  Principles of action of polymeric flocculants , 1972 .

[22]  J. Klein,et al.  Characterisation of poly(acrylamide) in solution , 1980 .

[23]  Ian Jones.  A theory of electrophoresis of large colloid particles with adsorbed polyelectrolyte , 1979 .

[24]  Adhesion measurements of polystyrene spheres attached to pyrex by polymeric flocculents in aqueous solution , 1982 .

[25]  K. Mühle,et al.  Untersuchungen zum Anhaften von Teilchen an eine Platte in wäßrigen Elektrolytlösungen , 1980 .

[26]  Martin A. Hubbe,et al.  Theory of detachment of colloidal particles from flat surfaces exposed to flow , 1984 .

[27]  Robert Pelton,et al.  Factors influencing the adhesion of polystyrene spheres attached to pyrex by polyethyleneimine in aqueous solution , 1984 .

[28]  D. Cousins,et al.  Role of the deaerator in the paper mill , 1983 .