Adsorption of Cationic Polymer onto Negatively Charged Surfaces in the Presence of Anionic Surfactant

Shubin, V. E.

doi:10.1021/la00016a022

Cited by 98 publications

(109 citation statements)

References 3 publications

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“…Coadsorption of a polycation in case a depresses the floatability (hydrophobicity) conferred by the cationic surfactant alone. On (43) Neutron scattering (53) Atomic force microscopy (44) Nuclear magnetic resonance (54) Calorimetry (45) Photon correlation spectroscopy (53) Ellipsometry (46) Radiotracer (55) Electron spin resonance (47) Rheology (56, 58) Fluorescence (48) Solubilization (Ad-) (57) Flotation/wetting (42,49) Suspension stability (56, 58) Infrared (50) Surface forces balance (46) Microscopy (51) Ultrafiltration (59) Neutron reflection (52) ζ Potential (49) the other hand, coadsorption of a polycation and a (normally nonadsorbing) surfactant of opposite charge can activate flotation (case c). A practical example of Fig.…”

Section: Solid/water Interfacementioning

confidence: 99%

Polymer/Surfactant Interaction: Interfacial Aspects

Goddard¹

2002

Journal of Colloid and Interface Science

361

300

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Section: Solid/water Interfacementioning

confidence: 99%

Polymer/Surfactant Interaction: Interfacial Aspects

Goddard¹

2002

Journal of Colloid and Interface Science

361

300

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“…There are other models of block co polyelectrolyte adsorption, but the conditions do not correspond our experimental system [4,5,6].…”

Section: Resultsmentioning

confidence: 82%

Adsorption of Hydrophobically Modified Polyelectrolytes on Hydrophobic Substrates

Mays¹,

Zhang²,

Tirrell³

1997

Rev. Inst. Fr. Pét.

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ADSORPTION DE POLYÉLECTROLYTES MODIFIÉS HYDROPHOBIQUEMENT SUR LES SUBSTRATS HYDROPHOBESUne série de copolymères à diblocs poly (fert-butyle styrène)-sodium (sulfonate de polystyrène) de masses moléculaires et pourcentages de sulfonation différents ont été utilisés pour étudier les effets de la structure du polymère sur son pouvoir d'adsorption sur des surfaces de silicium modifiées hydrophobiquement. Le pourcentage du bloc hydrophobe varie de S,6 à 8,9 %. Les études antérieures montrent que la concentration saline est très importante pour l'adsorption de ces polyélectrolytes sur les surfaces de silice. Nous avons utilisé l'octadecyltriéthoxysilane (OTE) pour modifier la surface de silicium qui change l'angle de contact de l'eau de 50° sur la silice non modi fiée à une valeur comprise entre 100° et 120° sur la silice modifiée. Sur cette surface hydrophobe, nous constatons que l'adsorption de ces polyélectrolytes légèrement modifiés hydrophobiquement est proche de la loi puissance 4/23 avec la concentration saline prédite par un modèle récent. La densité d'implantation est également cohé rente avec une dépendance à la longueur du bloc hydrophobe à la puissance -12/23, et è la longueur du bloc polyélectrolyte à la puis sance -6/23 prédite parce modèle. ADSORPTION OF HYDROPHOBICALLY MODIFIED POLYELECTROLYTES ON HYDROPHOBIC SUBSTRATESA series of diblock copolymers, poly (ferf-butyl styrene)-sodium poly (styrene sulfonate) with different molecular weight and percen tage of sulfonation have been used to study the effect of polymer structure on its adsorption behavior onto hydrophobically modified silicon wafers. The percentage of the hydrophobic block varies from 3.6-8.9 %. Previous studies show that salt concentration is very important for the adsorption of such polyelectrolytes onto silica surfaces. Octadecyltriethoxysilane (OTE) has been used to modify the silicon wafer which changes the water contact angle from 50° on unmodified silica to 100° to 120°. On this hydrophobic surface, we found that the adsorption of these slightly hydrophobically modified polyelectrolytes is close to the 4/23rd power of salt (1) Department of Chemical Engineering and M aterials Science, concentration predicted by a recent model. The grafting density is Minneapolis, MN55455 a|so consistent with a dependence on the length of the hydropho- ADSORCIÓN DE POLIELECTROLITOS MODIFICADOS HIDROFÒBICAMENTE SOBRE LOS SUSTRATOS H1DRÓFOBOSSe ha utilizado una serie de copolimeros de dibloques poli (tertbutilo-estireno)-sodio (sulfonato de poliestireno) de distintas masas moleculares y porcentajes de sulfonación, para estudiar los efectos de la estructura del polimero sobre su poder de adsorción sobre las superficies del silicio modificadas hidrofóbicamente. El porcentaje del bloque hidrófobo oscila entre 3,6 y 8,9 %. Diversos estudios anteriores vienen a demostrar que la concentración salina es sumamente importante para la adsorción de estos polielectrolitos sobre las superficies de silice. Se ha utilizado el octadeciltriehosisilano (OTE) para modifi...

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“…In the case where the polymer and the surfactant compete to adsorb the particles into the component, the strongest affinity to the surface will replace the other component at the surface. [8][9][10][11][12] In the case of the polymer and the surfactant, the attraction of the two components will form complexes. These complexes adsorb to the surface.…”

Section: Was Performed With a Stresstechmentioning

confidence: 99%

“…In the left test tube: c s < c s,i , and in the right test tube: c s > c sParticle inversion concentration (c s,i ) for C12 E 8 in systems containing EHEC and silica or polystyrene latex particles (PSL). The circles indicate the values of c s,i calculated from equation (2) (see Model section) 1% HM-EHEC, 0.01% PSL 1% HM-EHEC, 0.1% PSL 1% HM-EHEC, 1% PSL 0.2% HM-EHEC, 0.1% PSL 2% HM-EHEC, 0.Particle inversion concentration (c s,i ) for C 12 E 8 in systems containing HM-EHEC and polystyrene latex particles (PSL).…”

mentioning

confidence: 99%

Influence of added surfactant on particle flocculation in waterborne polymer–particle systems

et al. 2008

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Polymer-particle interactions can cause particle flocculation and phase separation problems in waterborne coatings. The problems can be the result of interactions that are either too weak or too strong. It is known by empirical work that addition of surfactants can minimize these problems. In this study, the authors have investigated how different types of surfactants influence the polymer-particle interactions. Both hydrophobic and hydrophilic particles were included in the study, and nonionic, anionic, and cationic surfactants were used. A simple model is suggested that can be used to predict the surfactant concentration needed to stabilize the system. The model considers the cmc (critical micelle concentration) of the surfactant, the adsorption to the polymer, and the adsorption to the particles.

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Adsorption of Cationic Polymer onto Negatively Charged Surfaces in the Presence of Anionic Surfactant

Cited by 98 publications

References 3 publications

Polymer/Surfactant Interaction: Interfacial Aspects

Polymer/Surfactant Interaction: Interfacial Aspects

Adsorption of Hydrophobically Modified Polyelectrolytes on Hydrophobic Substrates

Influence of added surfactant on particle flocculation in waterborne polymer–particle systems

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