New insights on the interaction between hydroxypropylmethyl cellulose and sodium dodecyl sulfate

Silva, Sérgio M.C.; Antunes, Filipe E.; Sousa, João; Valente, Artur J.M.; Pais, Alberto A. C. C.

doi:10.1016/j.carbpol.2011.03.053

Cited by 41 publications

(19 citation statements)

References 76 publications

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“…It was found that the CAC value remained approximately constant (2.10 mM) and independent of Carbopol Ò polymer concentration. Similar results for CAC and PSP dependence on polymer concentration were reported for hydroxypropylmethyl cellulose-SDS systems [6,29]. On the contrary, while PSP increased linearly with increasing concentration of cellulose, an exponential increase in PSP was noticed in the case of Carbopol Ò 940 (Fig.…”

Section: Resultssupporting

confidence: 88%

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Insight into the Interaction Between Carbopol^® 940 and Ionic/Nonionic Surfactant

Milanović

Krstonošić

Dokić

et al. 2015

J Surfact & Detergents

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Mixtures of a cross-linked polyacrylic acid (Carbopol Ò 940) and two types of surfactants, namely anionic sodium dodecylsulfate (SDS) and nonionic Tween Ò 80, were investigated by viscometry, conductometry, tensiometry, spectrophotometry, fluorimetry and scanning electron microscopy (SEM). The addition of nonionic surfactant decreased the reduced viscosity and the transmittance of the Carbopol Ò polymer aqueous solutions. Furthermore, the interaction between Carbopol Ò 940 and SDS was characterized by two significant concentration values: the critical aggregation concentration of SDS was particularly independent of Carbopol Ò polymer concentration while the polymer saturation point of both surfactants increased with the increase in polymer content. The values of critical aggregation concentration and polymer saturation point obtained using various techniques confirmed the occurrence of Carbopol Ò polymer-surfactant associations. The effect of different SDS and Tween Ò 80 concentrations on the conformation of Carbopol Ò 940 in aqueous solution could be explained through hydrophobic association between surfactant micelles and Carbopol Ò polymer tails and through hydrogen bonding in the case of Tween Ò 80. Additionally, the surfactant-induced structural changes were confirmed in Carbopol Ò 940-SDS and Carbopol Ò 940-Tween Ò 80 aqueous solutions by SEM measurements.

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Section: Resultssupporting

confidence: 88%

“…The break in the linear conductivity behaviour, which represents the CMC value, was observed at 8.2 mM for SDS at 25°C. The measured CMC was in agreement with previously published data [28][29][30].…”

Section: Resultsmentioning

confidence: 51%

Insight into the Interaction Between Carbopol^® 940 and Ionic/Nonionic Surfactant

Milanović

Krstonošić

Dokić

et al. 2015

J Surfact & Detergents

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“…For C 12 TAB, both the cmc and α decrease by increasing the initial concentration of porphyrin. While the decrease of cmc can be justified by an increase in the ionic strength of the medium, the analysis of dependence of  on the porphyrin concentration can be justified as due to the formation of dense aggregates[34].However, for C16 TAB, the cmc and the α slightly decreases in the presence of porphyrin, but do not change by varying the porphyrin concentration. This latter evidence suggests that the hydrophobic interactions responsible for micelle formation, in the presence of porphyrin, play a predominant role for C 16 TAB, when compared with C 12 TAB.…”

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confidence: 97%

Interactions between cationic surfactants and 5,10,15,20-tetrakis(4-sulfonatophenyl)porphyrin tetrasodium salt as seen by electric conductometry and spectroscopic techniques

Carmona

Piñeiro

Monteiro

et al. 2015

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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“…In the case of ionic surfactant-based solutions, electrical conductivity has been successfully used for determination of critical micelle concentration and degree of counter ion dissociation of micelles [138][139][140], or in the case of multicomponent systems, such as polymer-surfactant or multivalent salt-surfactant, polymer saturation points [141] and critical aggregation concentrations (see, e.g., [142]). That is, even in systems where the interpretation becomes rather complicated as a consequence of multiple contributions for the overall ionic conductance, electrical conductivity measurements may discriminate between structural or configurational changes as a consequence of counterions release (or charge neutralization followed by structural re-arrangements) or by significant changes in the size of ionic species.…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

The formation of host–guest complexes between surfactants and cyclodextrins

Valente

Söderman

2014

Advances in Colloid and Interface Science

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183

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Cyclodextrins are able to act as host molecules in supramolecular chemistry with applications ranging from pharmaceutics to detergency. Among guest molecules surfactants play an important role with both fundamental and practical applications. The formation of cyclodextrin/surfactant host-guest compounds leads to an increase in the critical micelle concentration and in the solubility of surfactants. The possibility of changing the balance between several intermolecular forces, and thus allowing the study of, e.g., dehydration and steric hindrance effects upon association, makes surfactants ideal guest molecules for fundamental studies. Therefore, these systems allow for obtaining a deep insight into the host-guest association mechanism. In this paper, we review the influence on the thermodynamic properties of CD-surfactant association by highlighting the effect of different surfactant architectures (single tail, double-tailed, gemini and bolaform), with special emphasis on cationic surfactants. This is complemented with an assessment of the most common analytical techniques used to follow the association process. The applied methods for computation of the association stoichiometry and stability constants are also reviewed and discussed; this is an important point since there are significant discrepancies and scattered data for similar systems in the literature.In general, the surfactant-cyclodextrin association is treated without reference to the kinetics of the process. However, there are several examples where the kinetics of the process can be investigated, in particular those where volumes of the CD cavity and surfactant (either the tail or in special cases the head group) are similar in magnitude.This will also be critically reviewed.

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New insights on the interaction between hydroxypropylmethyl cellulose and sodium dodecyl sulfate

Cited by 41 publications

References 76 publications

Insight into the Interaction Between Carbopol^® 940 and Ionic/Nonionic Surfactant

Insight into the Interaction Between Carbopol^® 940 and Ionic/Nonionic Surfactant

Interactions between cationic surfactants and 5,10,15,20-tetrakis(4-sulfonatophenyl)porphyrin tetrasodium salt as seen by electric conductometry and spectroscopic techniques

The formation of host–guest complexes between surfactants and cyclodextrins

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New insights on the interaction between hydroxypropylmethyl cellulose and sodium dodecyl sulfate

Cited by 41 publications

References 76 publications

Insight into the Interaction Between Carbopol® 940 and Ionic/Nonionic Surfactant

Insight into the Interaction Between Carbopol® 940 and Ionic/Nonionic Surfactant

Interactions between cationic surfactants and 5,10,15,20-tetrakis(4-sulfonatophenyl)porphyrin tetrasodium salt as seen by electric conductometry and spectroscopic techniques

The formation of host–guest complexes between surfactants and cyclodextrins

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Product

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Insight into the Interaction Between Carbopol^® 940 and Ionic/Nonionic Surfactant

Insight into the Interaction Between Carbopol^® 940 and Ionic/Nonionic Surfactant