Adsorption and dispersion mechanisms of aminosulfonic acid-based ceramic dispersants at black mud/water interface

作者：Pang, Yu-Xia; He, Zheng; Deng, Yong-Hong; Guo, Su-Fang; Qiu, Xue-Qing^*

来源：Journal of Chemical Engineering of Chinese Universities, 2015, 29(1): 20-26.

DOI：10.3969/J.ISSN.1003-9015.2015.01.003

• Adsorption force
• Calcium lignosulfonate
• Ceramic dispersants
• Dispersants
• Dispersion mechanisms
• Electrostatic repulsive forces
• Napthalenesulfonic acids
• Particle zeta potential

Compared with ceramic dispersants such as calcium lignosulfonate, napthalenesulfonic acid-formaldehyde condensate (FDN) and sulfonated acetone-formaldehyde condensate (SAF), aminosulfonic acid-based dispersant (ASP) shows better dispersion and viscosity reducing performance. By determining the adsorption isotherms of these four dispersants on black mud particles and studying their influence on particle zeta potential, it is found that the excellent dispersible performance of ASP is due to its large saturated amount of adsorption and the increase of absolute zeta potential of the particles, which results in strong electrostatic repulsive force and steric hindrance among particles. Urea, sodium chloride and sodium citrate were added to study the adsorption force between ASP and black mud particle, and the results indicate that complexation is the main force of the adsorption process, and the hydrogen bonds are also important.

• 出版日期2015-2-1
• 单位华南理工大学