Aqueous Solutions of Surfactants in Materials Engineering of Tribological Systems

Sułek, Marian W.; Bąk-Sowińska, Anna

doi:10.1201/b17691-14

Cited by 4 publications

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“…A hypothesis has been formulated that surface structures may, under friction conditions, form a stable lubricant film which reduces motion resistance and wear and increases the ability of the system to prevent seizure. This thesis has been confirmed in numerous tribological tests carried out under heavy loads (0–7.2 kN) [ 6 , 7 ]. In the interpretation of the results obtained, an important role was attributed to high adsorption, characteristic of anionic surfactants, and to the formation of liquid crystalline structures containing easy slip planes.…”

Section: Aqueous Solutions Of Anionic Surfactants As Swf Basesmentioning

confidence: 53%

“…Just like solutions of other surfactants aqueous sarcosinate solutions they can be used in lubrication technology [ 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 ]. In order to confirm this thesis, we planned to carry out stand and operational tests for working fluids (SWF) composed of aqueous solution of sodium lauroyl sarcosinate (2%), antifoam additive (0.05%) and biocide (0.1%).…”

Section: Discussionmentioning

confidence: 99%

“…This results in decreases in conductivity, ionic nature and skin irritation. The physicochemical properties of aqueous solutions of these surfactants indicate the formation of micelles and lyotropic liquid crystals (LLC) both in the bulk phase and in the surface phase [ 6 , 7 ]. A hypothesis has been formulated that surface structures may, under friction conditions, form a stable lubricant film which reduces motion resistance and wear and increases the ability of the system to prevent seizure.…”

Section: Aqueous Solutions Of Anionic Surfactants As Swf Basesmentioning

confidence: 99%

“…The analysis of aqueous solutions of surfactants indicates that they have not been included in any of the presented types of working fluids. In view of the possible application of aqueous surfactant solutions as lubricants, which was documented in numerous publications [ 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 ], it was proposed to create two new groups termed surfactant working fluids (SWFs) and surfactant lubricants (SLs). The aims of the introduction of this new classification (SWFs and SLs) are to avoid ambiguity in the description and to create a basis for a targeted development of this type of working and hydraulic fluids and, in the long term, a different group of lubricants.…”

Section: Introductionmentioning

confidence: 99%

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Ecological Cutting Fluids

Sułek

Bąk-Sowińska²,

Przepiórka

2020

Materials

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This study deals with metalworking fluids (MWFs). According to DIN 51385, depending on their base, the fluids are divided into oil and water fluids. The oil bases include, among others, mineral, synthetic, vegetable and paraffin oils. This division does not comprise surfactant solutions which can be successfully used in metalworking. Due to the fact that this type of fluid was not qualified, a new type of lubricant based on the aqueous solutions of surfactants has been proposed. Two new notions have been introduced: surfactant working fluids (SWFs) for working fluids and surfactant lubricants (SLs) for all kinds of lubricants as a broader term. The effect of the physicochemical properties of aqueous solutions of sodium lauroyl sarcosinate (SLS), also known as sodium N-dodecanoyl-N-methyl glycinate, on tribological properties determined using a four-ball machine (Tester T-02) (Łukasiewicz Research Network—The Institute for Sustainable Technologies, Radom, Poland) was analyzed. On the basis of aqueous SLS solutions a composition of working fluids was developed and their functional properties were verified by means of tribological and stand tests as well as during operation. The test results obtained clearly indicate that functional properties of 2% solutions of sodium lauroyl sarcosinate with a foam inhibitor (0.05%) and a biocide (0.1%) are comparable to those of a quality commercial hydraulic fluid.

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Section: Aqueous Solutions Of Anionic Surfactants As Swf Basesmentioning

confidence: 53%

Section: Discussionmentioning

confidence: 99%

Section: Aqueous Solutions Of Anionic Surfactants As Swf Basesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Ecological Cutting Fluids

Sułek

Bąk-Sowińska²,

Przepiórka

2020

Materials

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The Effect of the Formation of Polymer /Surfactant Complexes on Selected Tribological Properties of Their Aqueous Solutions

Sułek

Jedynak

2018

Tribologia

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Aqueous solutions of sodium alkyl sulphate (surfactant) and polyvinylpyrrolidone (polymer) whose physicochemical properties, including complexing ability, have been widely described in the literature were proposed as a model lubricant. It has been assumed that aqueous solutions of these compounds will favourably modify lubricating properties of water under high load conditions. For this purpose, measurements were made on a four-ball apparatus (T-02 Tester) for aqueous solutions of these compounds. Two kinds of tests were carried out: at constant loads (2, 3, and 4 kN) and variable loads within the range of 0 to 7.2 kN. Unexpectedly, high decreases in motion resistance and wear as well as an increase in antiseizure properties were found in relation to water as a base. The results obtained are so promising that solutions with an optimized composition can find practical applications. The surprisingly high effectiveness of the additives used results from the formation of surfactant/polymer complexes. These adducts adsorb at the interface, and, under friction conditions, they form a lubricant film capable of carrying high loads.

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The Effect of Surfactants With Steric Hindrance On the Physicochemical and Tribological Properties Of Metalworking Fluids

et al. 2020

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In earlier studies, it has been postulated that solutions of surfactants should be used as an original solution for formulation of Metal Working Fluids (MWF) compositions. The negative feature of some of the fluids was their excessive foamability whose reduction, by introducing hydrophobic foam inhibitors, was limited. Therefore, a synthesis of new oxyalkylated derivatives of 2-ethylhexyl alcohol and sulfosuccinate obtained from this alcohol was planned. Due to steric hindrance, these compounds exhibit low foamability. Aqueous solutions of these surfactants were subjected to physicochemical and tribological tests.

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Aqueous Solutions of Surfactants in Materials Engineering of Tribological Systems

Cited by 4 publications

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Ecological Cutting Fluids

Ecological Cutting Fluids

The Effect of the Formation of Polymer /Surfactant Complexes on Selected Tribological Properties of Their Aqueous Solutions

The Effect of Surfactants With Steric Hindrance On the Physicochemical and Tribological Properties Of Metalworking Fluids

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