Effect of Pluronics and surfactant adsorption onto dolomite suspension zeta potential and stability
Two kinds of Pluronics (PEO-PPO-PEO triblock copolymers) were used in these studies. They have mixed with anionic surfactant (sodium oleate). The adsorption isotherms of surfactant and copolymer-surfactant mixture onto dolomite have been determined. The adsorbed amount of the Pluronics increases with increasing concentration and reaches plateau. An increase of adsorbed amounts of anionic surfactant onto the mineral surfaces (dolomite) has been observed at the presence of Pluronic copolymers. The adsorption effect of triblock copolymers has been investigated on the zeta potential of dolomite at the water suspension. The interaction of anionic surfactant with copolymers causes a decrease of zeta potential to small amount due to the deformation of double electrical layer. The adsorbed non-ionic Pluronic layer partially screens the surface charge of mineral particles, and thus, reduces the zeta potential. On the other hand, the adsorption of anionic surfactant and copolymer caused a decrease of negative value of zeta potential both investigated minerals. The stability of dolomite suspension depends on the both copolymer and sodium oleate concentrations.
-  N. Rapoport, Stabilization and activation of Pluronic micelles for tumor-targeted drug delivery, Colloids Surfaces B: Biointerfaces 16, 93-111, (1999).
-  V. E., A. V. Kabanov, Pluronic block copolymers: Evolution of drug delivery concept from inert nanocarriers to biological response modifiers, J. Controlled Release, 130, 98-106, (2008).
-  H. Terayama, K. Okumura, K. Sakai, K. Tprigoe, K. Esumi, Aqueous dispersion behavior particles by addition of surfactant and polymer, Colloids Surfaces B: Biointerface, 20, 73-77, (2001).
-  A. Kapilashrami, M. Malmsten, K. Eskilsson, J-W. Benjamins, T. Nylander, Ellipsometric studies of nonionic block copolymers adsorbed at the solid/water and oil/water interfaces, Colloids Surfaces A. Physicochem. Eng. Aspects, 255, 181-192, (2003).
-  A. J. Shar, T. M. Obey, T. Cosgrove, Adsorption studies of polyethers. Part II: adsorption onto hydrophilic surfaces, Colloids Surfaces A: Physicochem. Eng. Aspects, 150, 15-23, (1999).
-  S. Govender, P. Swart, Surfactant formulations for multifunctional surface modification, Colloids Surfaces A: Physicochem. Eng. Aspects, 331, 97-102, (2008).[WoS]
-  V. A. Kabanov, E. V. Batrakova, V. Yu. Alakhov, Pluronic block copolymers as novel polymer therapeutics for drug and gene delivery, J. Controlled Release, 82, 189-212, (2002).
-  E. K. Wesenberg-Ward, B. J. Tyler, J. T. Sears, Adhesion and biofilm formation of Candida albicans on native and Pluronictreated polystyrene, Biofilms, 2, 63-71, (2005).
-  F. J. D. Taylor, R. K. Thomas, P. Penfold, Polymer/surfactant interactions at the air/water interface, Advance Colloid Inter. Sci. 132, 69-110, (2007).
-  H. L. Torn, A. de Keizer, L. K. Koopal, J. Lykleme, Mechanism adsorption of poly(vinylpyrrolidne) and sodium dodecylbenzenesulfonate on kaolinite, J. Colloid Inter. Sci., 260, 1-8, (2003).
-  R. Greenwood, P. F. Luckham, T. Gregory, The effect of particle size on the layer thickness of a stabilizing polymer adsorbed onto two different classes of polymer latex, as determined from rheological experiments, Colloids Surfaces A: Physicochem. Eng. Aspects, 98, 117-125, (1995).
-  O. Ortona, G. D’Errico, L. Paduano, V. Vitagliano, Interaction between cationic, anionic, and non-ionic surfactants with ABA block copolymer Pluronic PE6200 and BAB reverse block copolymer Pluronic 25R4, J. Colloid Inter. Sci., 301, 63-77, (2006).
-  R. Zhang, C. Liu, P. Somasundaran, A model for the cooperative adsorption of surfactant mixtures on solid surfaces, J. Colloid Inter. Sci., 310, 377-384, (2007).
-  D. A. Braem, D. C. Prieve, R. D. Tilton, Electrostatically tunable coadsorption of sodium dodecyl sulfate and poly(ethylene oxide)- b-poly(propylene oxide)-b-poly(ethylene oxide) triblock copolymer to silica, Langmuir, 17, 883-890, (2001).[Crossref]
-  D. Tsurumi, T. Yoshimura, K. Esumi, Adsolubilization of 2-naphtol into adsorbed layer of PEO-PPO-PEO triblock copolymers on hydrophilic silica, J. Colloid Inter.Sci., 297, 565-469, (2006).
-  S. J. Zhang, S. Lee, J. W. Lee, Does SDS micellize under methane hydrate-forming conditions below the normal Krafft point, J. Colloid Inter. Sci., 315, 313-318, (2007).
-  K. Szymczyk, B. Janczuk, The properties of a binary mixture of nonionic surfactants in water at the water/air interface, Langmuir, 23, 4972-4981, (2007).
-  H. Liu, H Xiao, Adsorption of poly(ethylene oxide) with different molecular weights on the surface of silica nanopaticles and the suspension stability, Materials Letters, 62, 870-873, (2008).