Detergency in spontaneously formed emulsions

Srivastava, Vibhor K.; Kini, Gautam C.; Rout, D. K.

doi:10.1016/j.jcis.2006.08.035

Cited by 33 publications

(21 citation statements)

References 16 publications

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“…Srivastava studied the removal of oily soil components from commercially available soiled fabrics using a commercial nonionic surfactant system 14 and Phan studied the removal of vegetable oil using an extended surfactant 15 . Tongcumpou studied the removal of triolein by using a surfactant mixture system composed of a nonionic surfactant and two anionic surfactants 16 .…”

Section: Introductionmentioning

confidence: 99%

Analysis of Cleaning Process for Several Kinds of Soil by Probability Density Functional Method

2017

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Section: Introductionmentioning

confidence: 99%

Analysis of Cleaning Process for Several Kinds of Soil by Probability Density Functional Method

2017

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“…Detergency was determined by previously standardized procedure [2,4]: The cotton fabric was soaked in oil; this contaminated fabric was washed by 100 ml of water, 0.2% solution of sophorolipid, and chemical surfactant (LAS), incubated for 30 min at 120 rpm and 25 o C [2,6,9]. Cleaning power was calculated by the following formula:…”

Section: Measurement Of Detergencymentioning

confidence: 99%

“…S.T., and emulsification ability, etc. [5,7,9]. The calculated surface active properties of the sophorolipids derived from different fatty acid are discussed below.…”

Section: Surface Active Propertiesmentioning

confidence: 99%

Tuning surface-active properties of bio-surfactant sophorolipids by varying fatty-acid chain lengths

Ahn

Morya

Kim

2016

Korean J. Chem. Eng.

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Sophorolipids are a kind of glycolipid-based bio-surfactant, and some known yeasts can produce them by utilizing plant oil at elevated glucose. In spite of a high production yield, sophorolipids have a limited industrial application, due to their narrow range of HLB (hydrophile -lipophile balance) value. These molecules have regained the attention of researchers and industrialists due to their surface properties and versatile applicability in herbal medicine and cosmetics. The bioactivity and surface properties of sophorolipids are mainly governed by chain length and type of the fatty acid. Therefore, the present study was designed to produce and characterize sophorolipids with varying fatty acid chain lengths. Surface-properties like critical micelle concentration of produced sophorolipids were varying from 43 to 62 (dyne/cm). Foamability, dispersion power, and detergence were found to be higher for short chained fatty acids than the longer ones. Cleaning ability of sophorolipid for FLUX coated PCB was found to be better than the chemical surfactants. Biodegradation rates of the sophorolipids were found to be higher than of the linear alkylbenzene sulfonate (LAS) at room temperature as well as 4 o C. These results showed that the properties of sophorolipids can be tuned by varying the chain' s properties of fatty acids, and it may be possible to customize the properties of sophorolipids for specific industrial applications.

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“…This includes concepts of soil removal based on three main mechanisms: roll-up, in which the system is wetted and there is a decrease of interfacial tensions; emulsification, where thermodynamically unstable suspensions are formed; and direct solubilization, characterized by the spontaneous dissolution of a substance in surfactant solution [4][5][6][7]. Although the chemistry behind cleaning mechanisms is relatively well established, the physical aspects of cleaning processes, and the relationship between the two, are yet to be fully explored.…”

Section: Introductionmentioning

confidence: 99%

The Tribology of Cleaning Processes

2016

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The effect of different chemistries on cleaning of hard surfaces has widely been investigated. However, a fundamental understanding of the physical aspects involved in grime removal is yet to be established. A series of surface experiments are presented in this paper to determine the mechanical properties of cleaning processes. Experimental results showed that tribology is a powerful tool to investing the mechanical forces associated with cleaning of soiled surfaces. Analysis of protein-based soil removal from stainless steel suggests that friction coefficient decreases by nearly 28 and 75% for dry and wet samples, respectively, with an increase of 8 times in the normal load. The study also indicates a reduction of the coefficient of friction with an increase in frequency due to the reduced adhesion of counterface pin material on the sample and the possible localized softening of the soil surface. Tests performed using wet samples revealed that friction coefficient significantly decreases as a consequence of the water content. The effect of load on wet samples was mainly observed for short soaking periods (5 minutes). Specimens soaked for 45 minutes showed about 84% lower friction coefficient compared to dry samples but no significant dependency on the applied load. The volume of soil removed was higher for experiments presenting lower friction coefficients. Finally, wet cleaning promoted a higher cleaning efficiency requiring less energy to remove more soil. Overall it was established that purely mechanical forces are not sufficient to complete the cleaning process. Future work investigating the relationship of these tribological aspects with the chemistry of cleaning is to be expected.

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Detergency in spontaneously formed emulsions

Cited by 33 publications

References 16 publications

Analysis of Cleaning Process for Several Kinds of Soil by Probability Density Functional Method

Analysis of Cleaning Process for Several Kinds of Soil by Probability Density Functional Method

Tuning surface-active properties of bio-surfactant sophorolipids by varying fatty-acid chain lengths

The Tribology of Cleaning Processes

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