A Novel Method for Evaluating Foam Properties

Powale, Rajendra S.; Andheria, Anish; Maghrabi, Shadaab; Bhagwat, Sunil S.

doi:10.1081/dis-200057663

Cited by 8 publications

(7 citation statements)

References 14 publications

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“…2, 3 and 4). Conversely a very small change was seen at higher concentrations above CMCs due to the high foam stability at these concentrations [16]. The -03 1,00E-02 1,50E-02 2,00E-02 2,50E-02 3,00E-02 lower values of initial foam height below the CMC have been explained by the fact that the air water interfaces do not contain sufficient amounts of surfactant to stabilize the foam.…”

Section: Foam Stabilitymentioning

confidence: 67%

“…The value of C m may be identified with the CMC of the surfactant and serves to quantify the potential foaming ability of surfactants [31]. Thus, the CMC of a surfactant is a good measurement of its efficiency as a foaming agent; the lower the CMC, the more efficient the surfactant as a foamer [1,5,14,16]. In the case of sample A, the surfactant had a lower CMC and was packed more efficiently at the interface according to the U value which was greater than that of sample B (3,04 9 10 -10 mol/ cm 2 and 2,83 10 -10 mol/cm 2 , respectively) [22].…”

Section: Foaming Powermentioning

confidence: 99%

“…So, foam is an important criterion in the evaluation of detergent compositions, and since the design of a product is often centered upon foaming characteristics, it is important to be able to measure this interesting phenomenon under many conditions [15]. In conclusion, characterization of foams is important in many applications, and this makes investigation of foam an active field of research [16].…”

Section: Introductionmentioning

confidence: 98%

See 2 more Smart Citations

Study of Foaming Properties and Effect of the Isomeric Distribution of Some Anionic Surfactants

Azira

Tazerouti

Canselier

2008

J Surfact & Detergents

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Using different reaction conditions of photosulfochlorination of n-dodecane, two samples of anionic surfactants of sulfonate type are obtained. Their micellar behavior has been already reported and the relationship between their isomeric distribution and their chemical structures and micellar behaviors have been more thoroughly explored. In this investigation, we screened the foaming properties (foaming power and foam stability) by a standardized method very similar to the Ross-Miles foaming tests to identify which surfactants are suitable for applications requiring high foaming, or, alternatively, low foaming. The results obtained for the synthesized surfactants are compared to those obtained for an industrial sample of secondary alkanesulfonate (Hostapur 60) and to those of a commercial sample of sodium dodecylsulfate used as reference for anionic surfactants. The foam formation and foam stability of aqueous solutions of the two samples of dodecanesulfonate are compared as a function of their isomeric distribution. These compounds show good foaming power characterized in most cases by metastable or dry foams. The highest foaming power is obtained for the sample rich in primary isomers which also produces foam with a relatively high stability. For the sample rich in secondary isomers we observe under fixed conditions a comparable initial foam height but the foam stability turns out to be low. This property is interesting for applications requiring low foaming properties such as dishwashing liquid for machines. The best results are observed near and above the critical micellar concentrations and at 25°C for both the samples.

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Section: Foam Stabilitymentioning

confidence: 67%

Section: Foaming Powermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

See 1 more Smart Citation

Study of Foaming Properties and Effect of the Isomeric Distribution of Some Anionic Surfactants

Azira

Tazerouti

Canselier

2008

J Surfact & Detergents

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“…[1] Different methods of foam formation show different foamabilities (for the same solution), since the time allowed for surfactant adsorption at the interface is different in each method. [1,18] Greater reduction in surface tension can be achieved, leading to high foamability, by allowing more time for surfactant adsorption.…”

Section: Resultsmentioning

confidence: 98%

Dynamic Behavior of Surfactants in Solution

Kalekar¹,

Bhagwat²

2006

Journal of Dispersion Science and Technology

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Adsorption of various surfactants at the gas liquid interface is studied with equilibrium and dynamic surface tension measurements. The Wilhelmey plate method and maximum bubble pressure method are used for this study. Dynamic surface tension of solutions of different surfactants, sodium lauryl sulfate (SLS), polyoxyethylene glycol 4-tert-octyl phenyl ether (Triton X 100), poly-oxyethylene(20) cetyl ether (Brij 58), and tetraethylene glycol mono-n-dodecyl ether (Brij 30), is measured at different concentrations. Adsorption of different surfactants is compared on the basis of equilibrium and dynamic behavior. Effectiveness and efficiency of different surfactants is found from equilibrium surface tension measurement. A new parameter is defined to quantify the dynamic behavior of adsorption, which gives the concentration of surfactant needed to reduce surface tension to half of its maximum reduction within a defined time available for adsorption. The dynamics of surfactant solution is quantified by using this parameter.Keywords Dynamic surface tension, interface, micelle, maximum bubble pressure method INTRODUCTIONThe dynamics of interfacial layers, especially the characterization of interfacial dynamics, has attracted large interest among interfacial researchers. Dynamics becomes increasingly important as modern technologies require more and more quantitative relationships between dynamic interfacial properties and technological parameters. In most technological applications where the interface is created rapidly, such as foam formation, quickness of interfacial adsorption (dynamics) becomes important. [1,2] The importance of dynamic surfactant adsorption in colloid systems is well recognized. Surfactant adsorption is a timedependent process, markedly varying with the mechanism of dynamic adsorption. The extent of this process is generally quantified by the variation of surface tension. However, the change in surface tension as a function of time is, in most cases, substantially slower than the one expected from diffusion-controlled adsorption. For example, a 3 mol . m 23 solution of SLS attains a reduction of 20 mN/m in surface tension of an air-liquid interface in a period of 20 s. However, a higher concentration of SLS solution achieves the same drop in less than 1 s. Some surfactants, such as polyoxyethylene(20) cetyl ether (Brij 58), adsorb more, reducing surface tension of the interface

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“…Rajendra and Bhagwat studied the foaming properties of three surfactants, including sodium laureth sulfate (SLS), Triton X-100 and Brij 58. 6 Pugh group investigated the surface tension and foamability of a series of polypropylene glycols (PPG) surfactants. The results showed that the molecular weight of PPG have signicant effect on the foamability of PPG foamers.…”

Section: Introductionmentioning

confidence: 99%