Interaction between carboxymethylchitin and tetradecyltrimethylammonium bromide: phase separation, surface tension and stability of microscopic foam films and foams

Babak, Valéry G.; Вихорева, Г. А.; Lukina, I. G.

doi:10.1016/s0927-7757(96)03908-8

Cited by 49 publications

(35 citation statements)

References 22 publications

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“…The properties of polymer-surfactant complexes are completely different form those of pure solutions of these two substances (Parida et al 2006). As a surface active agent influences surface tension (Babak et al 1997), each even small difference in the surfactant concentration causes changes in the surface excess at the liquid/gas interface (Penfold et al 2006). Then the addition of a surfactant to the system: polymer/solid also influences changes in the surface activity of the system (Rachas et al 2000).…”

Section: Resultsmentioning

confidence: 99%

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%

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

Grządka

2011

Cellulose

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“…4, curve b), thus giving evidence of the strong surface activity of the surfactant in the mixed solution. This effect is due to the cooperative adsorption of the dynamic associates (SPECs) formed between the anionic polyelectrolyte and the oppositely charged DTAB molecules (3,5).…”

Section: Figmentioning

confidence: 99%

“…In contrast, in the presence of extremely small amounts of oppositely charged surfactants (Z = 0.001 to 0.01, with Z = C s /C p , where C s and C p are the molar concentrations of surfactant and saccharide unit, respectively), their adsorption activity is increased by more than a hundredfold, owing to the formation of electrostatically stabilized dynamic associates, previously named SurfactantPolyElectrolyte Complexes (SPECs) (5).…”

Section: Introductionmentioning

confidence: 99%

Hydrophobically Associating Alginate Derivatives: Surface Tension Properties of Their Mixed Aqueous Solutions with Oppositely Charged Surfactants

Babak¹,

Skotnikova²,

Lukina³

et al. 2000

Journal of Colloid and Interface Science

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“…Introduction into the chitosan macromolecule of a small number of hydrophobic alkyl groups by alkylating amino groups or attaching a hydrophobic surfactant anion significantly increases the surface activity of the modified chitosan derivatives [10,11]. In [9,12] it is shown that the modification of chitosan by electrostatic attachment of an anionic surfactant (SDS) leads to the formation of surfactant-polyelectrolyte complexes with an unusually high surface activity. It is possible that both the head group and the hydrophobic chain of the surfactant are involved in the interaction with the polymer, wherein the hydrophobic interaction between the alkyl groups of the surfactant, which bonds ionically with the polymer chain of chitosan, occurs after electrostatic attachment of the first surfactant molecules to the polymer.…”

mentioning

confidence: 99%

“…Thus, chitosan modified with water-soluble COES significantly more effectively lowers the surface tension at the air -water boundary than that modified with the hydrophobic (oil-soluble) monoglyceride succinate. This fact is surprising and very interesting because it is known that increasing the hydrophilicity of a sulfate surfactant (introduction into its composition of the PEG moiety) decreases the surface activity of the surfactant itself and its complexes with cationic polymers [2,11,12].…”

mentioning

confidence: 99%

Preparation and Colloid Chemical Properties of New Surfactant Derivatives of Chitosan

et al. 2016

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This paper presents the investigation of interaction of chitosan with carboxylate surfactants -cetyl oligo ethylene succinate and 1-stearoyl-2-hydroxypropyl-3-succinate. It is shown that depending on the type of surfactant and the ratio of components, viscous solutions or colloidal dispersions form on interaction with chitosan. For solutions of chitosan -surfactant derivatives a significant non-additive decrease in surface tension is characteristic, making them useful for obtaining stable emulsions of oil in water.Much attention is devoted to the investigation of the interaction of low molecular weight surface-active agents (surfactants) with natural and synthetic polymers [1,2]. In a number of publications it has been shown that the type of anion-active surfactant has a significant effect on the colloid-chemical properties of the surfactant-polyelectrolyte complexes [3,5]. It is noted that the surface activity of sodium dodecyl sulfate (SDS) -cationic polymer complexes is a function of the length of the alkyl chain of the surfactants. An increase in the hydrophilicity of the alkyl sulfate molecule leads to a reduction of surface activity of both the surfactant and its cationic polymer complex [2]. It was found that in the case of hydrophilization of the sulfate "head" group of SDS by including a polyethylene oxide chain (4 to 10 units of ethylene oxide-EO) between the alkyl chain and the sulfate group there is a significant decrease in the sorptivity of the SDS -polyvinylpyrrolidone complex.[4] This effect is stronger the longer the oligo ethylene oxide chain, i. e., the more hydrophilic the head group, the weaker the interaction between SDS and the polymer [5].An interesting object for research of laws of interaction of ionic surfactants with the ionized polymers is a natural polysaccharide chitin, and especially its deacetylated derivative -chitosan. The presence in the chitosan molecule of hydroxyl and primary amino groups allows one to obtain new chitosan derivatives with surfactant properties that are promising for use in medicine, agriculture, food, and cosmetics industries [6,7]. Chitosan not containing alkyl groups shows practically no or very weak surface activity [8,9]. Introduction into the chitosan macromolecule of a small number of hydrophobic alkyl groups by alkylating amino groups or attaching a hydrophobic surfactant anion significantly increases the surface activity of the modified chitosan derivatives [10,11]. In [9,12] it is shown that the modification of chitosan by electrostatic attachment of an anionic surfactant (SDS) leads to the formation of surfactant-polyelectrolyte complexes with an unusually high surface activity. It is possible that both the head group and the hydrophobic chain of the surfactant are involved in the interaction with the polymer, wherein the hydrophobic interaction between the alkyl groups of the surfactant, which bonds ionically with the polymer chain of chitosan, occurs after electrostatic attachment of the first surfactant molecules to the polymer.In the study of t...

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Interaction between carboxymethylchitin and tetradecyltrimethylammonium bromide: phase separation, surface tension and stability of microscopic foam films and foams

Cited by 49 publications

References 22 publications

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

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

Hydrophobically Associating Alginate Derivatives: Surface Tension Properties of Their Mixed Aqueous Solutions with Oppositely Charged Surfactants

Preparation and Colloid Chemical Properties of New Surfactant Derivatives of Chitosan

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