高分子電解質存在下での石炭濃厚水分散系の界面電気現象 (第2報)
CWMの粘性挙動に対する高分子電解質の構造の影響
1992 年 41 巻 7 号 p. 544-550
詳細
1992 年 41 巻 7 号 p. 544-550
The influence of polyelectrolytes on the theological behavior of a coal water mixture (CWM) was studied electrokinetically. Three polyelectrolytes were used, sodium polystyrene sulfonate (PSS-Na), (sodium naphthalene sulfonate) formaldehyde condensate (NSF-Na) and (sodium styrene sulfonate) maleate copolymer (SSMA-Na). The viscosity of CWM was lowest when using PSS-Na as the dispersant. The molecular weight and degree of sulfonation of PSS-Na was optimized since PSS-Na increased the charge on coal particles where the degree of adsorption is lower than other polyelectrolytes.
ζ-pontential of coal particles determined by CVP was found correlated to optimal molecularweight (Mw=15000) by which CWM viscosity was minimized. Viscosity of CWM increased, there was little change in ζ-potential with decreasing sulfonation. Coal particles thus appear to be bridged by the PSS-Na since PSS-Na with lessen sulfonation showed greater affinity foward coal particles.
