1984 Volume 41 Issue 12 Pages 727-732
The flocculation behavior of platelet particles induced by non-adsorbing polymer has been studied using the tungstic acid sol (t-sol) plus the poly (ethylene oxide) (PEO) system. The PEO molecules do not adsorb alone on the t-sol particles, and do not show any influence on the flocculation behavior of the t-sol. However, the t-sol involving particles covered by other polymer (e. g., polyacrylamide (PAAm)) layers has flocculated effectively by the PEO, especially by changing the solvency of the PEO solution. Flocculation measurements are made at 25°C, 40°C and 50°C at various electrolyte (MgSO4) concentrations. These results indicate that the present flocculation has occurred by the cohesive energy of the PEO through the adsorption layers of PAAm, and has been not caused by the depletion layer effect of the non-adsorbing polymer.
