Study of polymer-surfactant interactions via surface tension measurements

Touhami, Y.; Rana, Dipak; Neale, Graham H.; Hornof, V.

doi:10.1007/s003960000455

Cited by 52 publications

(27 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…When surfactants are added to a liquid solution without polymer, surface tension decreases monotonically up to a certain concentration called the critical micelle concentration (CMC) and remains constant thereafter (14). systems can be divided into three regions depending on their concentrations: a monomer region, a polymer-surfactant complex region, and a micellization region (14).…”

Section: Surface Tensionmentioning

confidence: 99%

See 1 more Smart Citation

Surface Remobilization of Gas Bubbles in Polymer Solutions Containing Surfactants

Rodrigue

Blanchet

2002

Journal of Colloid and Interface Science

View full text Add to dashboard Cite

Section: Surface Tensionmentioning

confidence: 99%

“…systems can be divided into three regions depending on their concentrations: a monomer region, a polymer-surfactant complex region, and a micellization region (14). Surfactant molecules are thus partitioned between free surfactant, polymer-bound surfactant, and micellized surfactant.…”

Section: Surface Tensionmentioning

confidence: 99%

Surface Remobilization of Gas Bubbles in Polymer Solutions Containing Surfactants

Rodrigue

Blanchet

2002

Journal of Colloid and Interface Science

View full text Add to dashboard Cite

“…This sort of behavior has been found when measuring surface the tensions of systems with SDS in the presence of a fixed amount of PEG [39]. The point at which the second plateau begins is called the critical aggregation concentration (CAC) and is reported to indicate the occurrence of clusters formed by complex structures resultant from polymer-surfactant interactions [40].…”

Section: Resultsmentioning

confidence: 79%

Coil Interpenetration, Segment Aggregation and Adsorption of PEG at Water/Air Interface

Rego

Melo

Neto

et al. 2017

J Surfact & Detergents

View full text Add to dashboard Cite

Poly(ethylene glycol) (PEG), both as an oligomer and as a high molecular weight polymer, has been used as a surfactant active component in many applications, in its pure and unmodified structure, or as a block segment within more complex structures. Apart from assuming helical or coil conformations it may also undergo aggregation, depending on the solvent. In this work, we characterized the aggregation of PEG in water using surface tensiometry and turbidimetry. Aggregation was characterized by a non‐persistent surface tension plateau at higher PEG contents and confirmed by turbidimetry, which was correlated to the derivative of osmotic pressure in relation to concentration. One can divide a surface tension‐concentration curve into two regions, delimited by a characteristic concentration: one following a Langmuir adsorption isotherm (starting from a plateau equal to pure water surface tension) ending in a second plateau, and a second one (beginning at this plateau) following a Freundlich isotherm. The calculated surface excess for PEG segment adsorption was consistent with segment aggregation, indicating more two characteristic concentrations correlated to this occurrence. A total of three characteristic mer concentrations were found (6.2 × 10−7, 6 × 10−6, and 2 × 10−4mol L−1) and related to PEG segment aggregation states.

show abstract

“…During the past few decades, extensive studies were conducted on the use of polymers and surfactants for the purpose of drag reduction (Virk, 1975;Graham, 2004;Zakin, 2010). A majority of these studies are focused on the methodology, and the feasibility to accomplish polymer-surfactant aggregation at very low surfactant concentrations (Goddard and Ananthapadmanabhan, 1993;Kwak, 1998;Touhami et al, 2001;Trabelsi and Langevin, 2007). However, they have certain advantages and disadvantages over each other.…”

Section: Introductionmentioning

confidence: 99%

Drag reduction in turbulent pipeline flow of mixed nonionic polymer and cationic surfactant systems

Mohsenipour

Pal

2011

Can J Chem Eng

View full text Add to dashboard Cite

Turbulent drag reduction behaviour of a mixed nonionic polymer/cationic surfactant system was studied in a pipeline flow loop to explore the synergistic effects of polymeric and surfactant drag reducing additives. The nonionic polymer used was polyethylene oxide (PEO) at three different concentrations (500, 1000, and 2000 ppm). The surfactant used was cationic octadecyltrimethylammonium chloride (OTAC) at concentration levels of 1000 and 2500 ppm. Sodium salicylate (NaSal) was used as a counter-ion for the surfactant at a molar ratio of 2 (MR = Salt/OTAC = 2). Relative viscosity and surface tension were measured for different combinations of PEO and OTAC. While the relative viscosities demonstrated a week interaction between the polymer and the surfactant, the surface tension measurements exhibited negligible interaction. The pipeline results show a considerable synergistic effect, that is, the mixed polymer-surfactant system gives a significantly higher drag reduction (lower friction factors) as compared with pure polymer or pure surfactant. The addition of surfactant to the polymer always enhances drag reduction. However, the synergistic effect in mixed system is stronger at low polymer concentrations and high surfactant concentrations.

show abstract

Study of polymer-surfactant interactions via surface tension measurements

Cited by 52 publications

References 0 publications

Surface Remobilization of Gas Bubbles in Polymer Solutions Containing Surfactants

Surface Remobilization of Gas Bubbles in Polymer Solutions Containing Surfactants

Coil Interpenetration, Segment Aggregation and Adsorption of PEG at Water/Air Interface

Drag reduction in turbulent pipeline flow of mixed nonionic polymer and cationic surfactant systems

Contact Info

Product

Resources

About