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Title: 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]

Abstract

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.

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

Citation Formats

Fogler, H S. 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]. United States: N. p., 1987. Web.
Fogler, H S. 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]. United States.
Fogler, H S. 1987. "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]". United States.
@article{osti_6761110,
title = {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]},
author = {Fogler, H S},
abstractNote = {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.},
doi = {},
url = {https://www.osti.gov/biblio/6761110}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1987},
month = {1}
}

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