Adsorption of polyethyleneimine from aqueous solutions on bentonite clays

• Published in: Materials letters Vol. 55; no. 1; pp. 73 - 76
• Main Authors: Öztekin, Nevin, Alemdar, Ayşe, Güngör, Nurfer, Erim, F.Bedia
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01-07-2002; Elsevier
• Subjects: Applied sciences; Bentonite; Cationic polymer; Exact sciences and technology; Organic polymers; Physicochemistry of polymers; Polyethyleneimine; Properties and characterization; Rheology; Solution and gel properties; Polyethyleneimine; Bentonite; Cationic polymer; Rheology; Polyelectrolyte; Clay; Liquid solid adsorption; Adsorption isotherm; Adsorption capacity; Kinetics; Aqueous solution; Experimental study; Polyethylene imine
• ISSN: 0167-577X; 1873-4979
• DOI: 10.1016/S0167-577X(01)00622-X

The adsorption of the cationic polymer, polyethyleneimine (PEI), on bentonite clay particles was investigated. The adsorption rates for the bentonite suspensions are very fast. The high affinity type of interactions between PEI and bentonite samples is attributed to the electrostatic interaction between the clay particles in ambient basic suspensions and the positively charged high molecular weight polyelectrolyte. The adsorption capacity and the influence of the polyelectrolyte on the rheological behavior change with the exchangeable ions, i.e. Na and Ca ions of the bentonite samples.