Lubricating properties of aqueous solutions of oxyethylated surfactants and mixtures of these materials with fatty acid soaps

1980 ◽  
Vol 16 (5) ◽  
pp. 348-350
Author(s):  
B. S. Shapoval ◽  
A. A. Stulii ◽  
V. P. Temnenko ◽  
A. K. Maskaev ◽  
E. V. Lebedev
Keyword(s):  
Fatty Acid ◽  
Aqueous Solutions ◽  
Oxyethylated Surfactants ◽  
Lubricating Properties

scholarly journals Improving the performance of diesel engines fuel for agricultural machinery

2020 ◽  
pp. 90-92
Author(s):  
Stanislav Alexandrovich Nagornov ◽  
Svetlana Evgenyevna Romantsova ◽  
Vladimir Anatolyevich Markov ◽  
Sa Bowen ◽  
Evgeniy Victorovich Bebenin
Keyword(s):  
Dipole Moment ◽  
Fatty Acid ◽  
Quantum Chemical Calculations ◽  
Quantum Chemical ◽  
Chain Fatty Acid ◽  
Agricultural Machinery ◽  
Long Chain Fatty Acid ◽  
Camelina Oil ◽  
Long Chain ◽  
Lubricating Properties

Quantum-chemical calculations of the parameters of the synthesized molecules have been carried out. There is observed a good correlation of the values of the molecules’ dipole moment and the charge on nitrogen atoms of the investigated compounds with the lubricating properties. Products, containing molecules of long-chain fatty acid diesters obtained from technical camelina oil and triethanolamine, have good lubricating properties.

THE SORPTION OF SOAP BY TEXTILE FIBERS

1950 ◽  
Vol 28f (3) ◽  
pp. 51-61 ◽  
Author(s):  
A. S. Weatherburn ◽  
G. R. F. Rose ◽  
C. H. Bayley
Keyword(s):  
Molecular Weight ◽  
Fatty Acid ◽  
Aqueous Solutions ◽  
Sodium Oleate ◽  
Viscose Rayon ◽  
Free Alkali ◽  
Textile Fibers ◽  
Complex Process ◽  
Maximum Sorption ◽  
Preferential Sorption

The sorption of the sodium soaps of lauric, myristic, palmitic, stearic, and oleic acids from aqueous solutions by various textile fibers has been measured. The sorption of both the fatty acid and alkali components of the soaps by dull acetate rayon and dull nylon fibers was essentially the same as that shown by the corresponding bright (undelustered) fibers, while dull viscose rayon sorbed considerably more fatty acid than the bright fiber. In general, the order of increasing sorption was: cotton, nylon, acetate, bright viscose, dull viscose, and wool. Of the saturated soaps, the maximum sorption of fatty acid by all fibers was obtained with sodium myristate, while the alkali sorptions were approximately the same for myristate, palmitate, and stearate, all of which were higher than for laurate. The sorption from sodium oleate solutions corresponded approximately to that from the C14–C16 saturated soaps. Preferential sorption of alkali by cotton and viscose rayon was observed for all soaps, while acetate rayon, nylon, and wool showed preferential sorption of fatty acid with the lower molecular weight soaps and preferential sorption of alkali with the higher soaps. Suppression of hydrolysis by the addition of excess free alkali resulted in a reduction in fatty acid sorption in every case, and shifted the maximum from the C14 to the C16 soap. It is concluded that the sorption of soap by textile fibers is a complex process involving the more or less independent sorption of neutral soap, hydrolytic fatty acid (or acid soap), and hydrolytic alkali.

Surface Activity of Fatty Acid Salts in Aqueous Solutions

2004 ◽  
Vol 77 (4) ◽  
pp. 595-598 ◽  
Author(s):  
I. Yu. Averko-Antonovich ◽  
L. R. Ziganshina ◽  
A. P. Rakhmatullina ◽  
R. A. Akhmed'yanova
Keyword(s):  
Fatty Acid ◽  
Aqueous Solutions ◽  
Surface Activity ◽  
Fatty Acid Salts ◽  
Acid Salts

scholarly journals Micellar solubilization of fatty acids in aqueous media containing bile salts and phospholipids

1976 ◽  
Vol 35 (1) ◽  
pp. 77-87 ◽  
Author(s):  
A. Smith ◽  
A. K. Lough
Keyword(s):  
Fatty Acids ◽  
Fatty Acid ◽  
Aqueous Solutions ◽  
Bile Salts ◽  
Micellar Solution ◽  
Unsaturated Fatty Acids ◽  
Aqueous Media ◽  
Micellar Solubilization ◽  
Acid Solubility ◽  
Ph Range

1. The solubility of fatty acids in aqueous media containing bile salts alone and in admixture with either lecithin (phosphatidylcholine) or phosphatidylethanolamine was determined.2. Over the pH range 2.0–7.4, the order of fatty acid solubility in aqueous solutions containing bile salts was linoleic > oleic > elaidic > palmitic > stearic. The solubility of each fatty acid increased as the pH of the micellar solution increased.3. Addition of lecithin to aqueous solutions of bile salts greatly increased the solubility of palmitic acid and stearic acid.4. In the presence of bile salts and lecithin, the solubility of oleic acid and elaidic acid decreased with increasing pH of the micellar solution, indicating a competitive effect between the fatty acid anions and lecithin. The solubility of linoleic acid increased linearly with lecithin concentration.5. Phosphatidylethanolamine as an additive to bile salts increased the solubility of both saturated and unsaturated fatty acids in the pH range 2.0–7.4. The effectiveness of phosphatidylethanolamine as an amphiphile was similar to that of lecithin, although at pH 3.0 fatty acid solubility was greater in the presence of phosphatidylethanolamine.6. The significance of these findings is discussed in relation to the intestinal absorption of fatty acids in sheep.

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