Microscopic and physicochemical studies of polymer-modified kaolinite suspensions

作者：Cao, J.; Kang, X.; Bate, B.^*

来源：Colloids and Surfaces A: Physicochemical and Engineering Aspects , 2018, 554: 16-26.

DOI：10.1016/j.colsurfa.2018.06.019

• Biopolymers
• Zeta potential
• Microscopic particle size
• Time-lapse

Sedimentation tests on kaolinite in biopolymers (xanthan gum, chitosan, polyacrylic acid and polyacrylamide) solutions were conducted and recorded with time-lapsed technique up to 35 days. Microscopic particle size, zeta potential, final volume and solid content were measured along the elevation of the graduated cylinder at the end of tests, and settling velocity and intensity calculated. Test results suggested that positive charged edges of kaolinite particles attached to negatively-charged xanthan gum (0.001 and 0.5 g/l) long chain via electrostatic force, exhibiting edge-to-edge (EE) fabric structure, and that charge neutralization was the primary interaction mechanism between kaolinite and either chitosan (0.05 and 5 g/l) or PAA(0.05 and 1 g/l),and that steric stabilization dominates the interaction between kaolinite and PAM molecules at 0.1 and 0.5 g/l PAM solutions.

• 出版日期2018-10-5
• 单位湖南大学; 浙江大学