Partitioning behavior of silica in the Triton X-100/dextran/water aqueous biphasic system

Zeng, Xin; Osseo‐Asare, K.

doi:10.1016/j.jcis.2003.11.009

Cited by 29 publications

(21 citation statements)

References 56 publications

(120 reference statements)

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“…As such a nonionic surface active agent as Triton X-100 Fig. 5 Adsorption situations in the system: polymer/surfactant/solid, a only one of these two adsorbates has the affinity to the surface but they cannot bind to each other, b only one of these two adsorbates has the affinity to the surface but they also can bind to each other, c both the polymer and the surfactant have affinity to the surface but not to each other, d both the polymer and the surfactant have the affinity to the surface and to each other Cellulose (2011) 18:291-308 299 does not dissociate and does not form charge, the mechanism of complexes formation between the surfactant and the polymer has also non-electrostatic character, mostly of hydrogen bond type or hydrophobic one (Zeng and Osseo-Asare 2004). Hydroxyl groups from the CMC macromolecules and from TX-100 as well as oxygen atoms with a lone electron pair take part in hydrogen bond formation.…”

Section: Resultsmentioning

confidence: 99%

“…In this paper the average values are reported. SDS concentration was analyzed by a variation of Zerbe et al method (Zerbe et al 2000;Zeng and Osseo-Asare 2004). 1 L of indicator solution was prepared by dissolving 0.16 g of dimidium bromide and 0.04 g of patent blue in doubly-distilled water in the presence of 40 mL of 1.25 M sulfuric acid.…”

Section: Methodsmentioning

confidence: 99%

“…According to authors this fact results from the formation of the HNHEC-SDS complexes in the bulk solution. Zeng and Osseo-Asare measured partition of hematite in the Triton X-100/Dextran aqueous biphase system (Zeng and Osseo-Asare 2004). They found out that in this system hematite stays in the bottom dextran-rich phase under all pH conditions.…”

Section: Introductionmentioning

confidence: 99%

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Competitive adsorption in the system: carboxymethylcellulose/surfactant/electrolyte/Al2O3

Grządka

2011

Cellulose

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The adsorption of carboxymethylcellulose (CMC) in the presence or absence of the surfactants: anionic SDS, nonionic Triton X-100 and their mixture SDS/TX-100 from the electrolyte solutions (NaCl, CaCl 2 ) on the alumina surface (Al 2 O 3 ) was studied. In each measured system the increase of CMC adsorption in the presence of surfactants was observed. This increase was the smallest in the presence of SDS, a bit larger in the presence of Triton X-100 and the largest when the mixture of SDS/Triton X-100 was used. These results are a consequence of formation of complexes between the CMC and the surfactant particles. Moreover, the dependence between the amount of surfactants' adsorption and the CMC initial concentration was measured. It comes out that the surfactants' adsorption amount is not dependent on the CMC initial concentration and moreover, it is unchanged in the whole measured concentration range. The influence of kind of electrolyte, its ionic strength as well as pH of a solution on the amount of the CMC adsorption at alumina surface was also measured. The amount of CMC adsorption is larger in the presence of NaCl than in the presence of CaCl 2 as the background electrolyte. It is a result of the complexation reaction between Ca 2? ions and the functional groups of CMC belonging to the same macromolecule. As far as the electrolyte ionic strength is concerned the increase of CMC adsorption amount accompanying the increase of electrolyte ionic strength is observed. The reason for that is the ability of electrolyte cations to screen every electrostatic repulsion in the adsorption system. Another observation is that the increase of pH caused the decrease of CMC adsorption. The explanation of this phenomenon is connected with the influence of pH on both dissociation degree of polyelectrolyte and kind and concentration of surface active groups of the adsorbent.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Competitive adsorption in the system: carboxymethylcellulose/surfactant/electrolyte/Al2O3

Grządka

2011

Cellulose

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“…The reason for that is nonionic character of polyethylene glycol p-(1,1,3,3-tetramethylbutyl)-phenyl ether. This surfactant does not dissociate and does not form any charge, but has large capability of formation of complexes (Zeng and Osseo-Asare 2004). As CMC adsorption amount in the presence of polyethylene glycol p-(1,1,3,3-tetramethylbutyl)-phenyl ether is larger than in the presence of SDS, it means that the complexes between CMC and polyethylene glycol p-(1,1,3,3-tetramethylbutyl)-phenyl ether are created more effectively than those between CMC and SDS due to the electrostatic repulsion between the anionic CMC and the negatively charged SDS which lowers the possibility of complex formation.…”

Section: Resultsmentioning

confidence: 99%

Adsorption and elektrokinetic properties of the system: carboxymethylcellulose/manganese oxide/surfactant

Grządka

Chibowski

2011

Cellulose

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The adsorption of carboxymethylcellulose (CMC) in the presence of the surfactants: anionic SDS, nonionic polyethylene glycol p-(1,1,3,3-tetramethylbutyl)-phenyl ether (Triton X-100) and their mixtures SDS/polyethylene glycol p-(1,1,3,3-tetramethylbutyl)-phenyl ether with different molar ratios (1:1; 1:3 and 3:1) from the electrolyte solutions (NaCl, CaCl 2 ) on the manganese dioxide surface (MnO 2 ) was studied. In every measured system the increase of CMC adsorption in the presence of surfactants was observed. This increase was the smallest in the presence of SDS, a bit larger in the presence of polyethylene glycol p-(1,1,3,3-tetramethylbutyl)-phenyl ether and the largest when the mixtures of SDS/polyethylene glycol p-(1,1,3,3-tetramethylbutyl)-phenyl ether were used. Among the measured mixtures, the mixture of SDS/polyethylene glycol p-(1,1,3,3-tetramethylbutyl)-phenyl ether with the molar ratio 1:3 caused the largest increase of CMC adsorption amount. These results are a consequence of formation of complexes between the carboxymethylcellulose macromolecules and the surfactant molecules. In order to determine the electrokinetic properties of the system the surface charge density of MnO 2 and the zeta potential measurements were conducted in the presence of the CMC macromolecules and the surfactants. The obtained data showed that the adsorption of CMC or CMC/surfactants complexes on the manganese dioxide surface strongly influences the structure of the electric double layer MnO 2 /electrolyte solution.

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“…The measurement error in the analyses was from 5 to 9%. SDS concentration was analyzed by a variation of Zeng method (Zeng & Osseo-Asare, 2004). One decimetre cube of indicator solution was prepared by dissolving 0.16 g of dimidium bromide and 0.04 g of patent blue in doubly-distilled water in the presence of 40 cm 3 of 1.25 mol dm −3 sulfuric acid.…”

Section: Adsorption Measurementsmentioning

confidence: 99%

Interactions between kappa-carrageenan and some surfactants in the bulk solution and at the surface of alumina

Grządka

2015

Carbohydrate Polymers

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Partitioning behavior of silica in the Triton X-100/dextran/water aqueous biphasic system

Cited by 29 publications

References 56 publications

Competitive adsorption in the system: carboxymethylcellulose/surfactant/electrolyte/Al2O3

Competitive adsorption in the system: carboxymethylcellulose/surfactant/electrolyte/Al2O3

Adsorption and elektrokinetic properties of the system: carboxymethylcellulose/manganese oxide/surfactant

Interactions between kappa-carrageenan and some surfactants in the bulk solution and at the surface of alumina

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