Improving the stability of coal slurries: Quarterly progress report for the period December 15, 1986-March 15, 1987. [Adsorption of gum tragacanth on polystyrene latex spheres]

Technical Report · Thu Jan 01 00:00:00 EST 1987

OSTI ID:6761110

Fogler, H S

The previous quarterly progress report focusing on the adsorption study of the polystyrene latex spheres with gum tragacanth (GT) indicated that the conformation of GT on the surface of latex spheres plays an important role in the stabilization. To prove this, photon correlation spectroscopy was undertaken, and the steric layer thickness was measured as a function of pH. The results showed that the thickness increases as pH decreases. It is possible that at lower pH the ionization of carboxylic groups is repressed so that GT molecules no longer repel each other and become extended. In addition, the experiments in which pH was lowered showed that the particles which flocculated in the GT solution at higher pH can be deflocculated owing to the increase in the steric layer thickness. 5 refs., 5 figs., 1 tab.

• Research Organization: Michigan Univ., Ann Arbor (USA). Dept. of Chemical Engineering
• DOE Contract Number: FG22-85PC80517
• OSTI ID: 6761110
• Report Number(s): DOE/PC/80517-T6; ON: DE87006804
• Resource Relation: Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
COLLOIDS
ADSORPTION
FUEL SLURRIES
ADDITIVES
STABILITY
POLYSTYRENE
SORPTIVE PROPERTIES
CORRELATIONS
EXPERIMENTAL DATA
PH VALUE
STABILIZATION
THICKNESS
WATER
DATA
DIMENSIONS
DISPERSIONS
FUELS
HYDROGEN COMPOUNDS
INFORMATION
MATERIALS
MIXTURES
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXYGEN COMPOUNDS
PETROCHEMICALS
PETROLEUM PRODUCTS
PLASTICS
POLYMERS
POLYOLEFINS
POLYVINYLS
SLURRIES
SORPTION
SURFACE PROPERTIES
SUSPENSIONS
SYNTHETIC MATERIALS
010600* - Coal
Lignite
& Peat- Properties & Composition