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

Abstract

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.

Enhanced oil recovery by nonionic surfactants considering micellization, surface, and foaming properties

“…Adsorption of surfactants at the air-water interface plays an important role in the formation of foam and its stability. The Gibbs surface adsorption equation was used to calculate the surface excess for all the surfactants as follows (Amaral et al 2008;Azira et al 2008;Tan et al 2005;Wang and Chen 2006):…”

Experimental Study on Foam Properties of Mixed Systems of Silicone and Hydrocarbon Surfactants

“…Researchers have also proposed to characterize foam stability as the time (t 1/2 or half-life) required for the foam volume or height to decay to one-half of the initial height [33,37]. To avoid longlasting measurements of decay of the foam height, the R 5 parameter is proposed as the quotient of the foam height after 5 min to the initial foam height [5,33,[38][39][40]. In the current study, the initial foam height h 0 and residual foam height h 5 were measured for all surfactants.…”

“…Among the three types of surfactants, hydrocarbon surfactants are the most widely used in foam industries. Much effort has been devoted to researching the foam properties of mixed systems of different hydrocarbon surfactants [1][2][3][4][5][6][7][8]. Nowadays, foams have wide applications in chemical, pharmaceutical, textile, flotation, washing, food industries, water treatment, and in enhanced oil recovery [9][10][11][12][13].…”

Surface and Antimicrobial Properties ofN-Palmitoyl Amino Acid–Based Surfactants

“…prefer foaming agents. [24] The foaming power in general increases with an increase in the alkyl chain length of the same analogue. [25] Foam stability of SNPIle is superior to SLS (Table 1).…”