Surface Properties of Alkylpyridinium Chlorides and the Applicability of the Pendant Drop Technique

Kohler, Hans‐Helmut

doi:10.1006/jcis.1999.6413

Cited by 22 publications

(23 citation statements)

References 10 publications

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“…Figure 4 also shows the critical micelle concentration (from Figure 3) as the function of the hydrocarbon chain length. For comparison, these parameters of alkylpyridinium chlorides are shown in Figure 4 as well [18,19] . Therefore, both the adsorption at water-air interfaces and aggregation formation agreed with the behaviour of conventional surfactants.…”

Section: Figurementioning

confidence: 99%

A novel family of green ionic liquids with surface activities

et al. 2007

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Ionic liquids have many unique properties as a new and remarkable class of environmental benign solvents, which promises widespread applications in industry and other areas. However, the ionic liquids with surface activity are rarely reported. In this work, a series of novel ionic liquids was synthesized by using N-methyl-2-pyrrolidone and alkyl bromide. The physical properties of this family of ionic liquids have been characterized, which shows that these compounds have ionic liquids characteristics, surface activity and biocompatibility. surface activity, ionic liquids, N-methyl-2-pyrrolidone, biocompatibility In recent years, ionic liquids have attracted considerable interest, and a number of reviews that cover the history, properties and use of ionic liquids are available. Unlike conventional molten salts, ionic liquids are salts with low melting points (<100℃). Ionic liquids are mainly composed of organic cations and anions which are inorganic groups or organic groups. However, the ionic liquid field continues to be extensively dominated by imidazolium salts with fluorine containing anions. Among the more useful properties of ionic liquids are the following: (1) they are relatively nonvolatile, which means they do not produce atmospheric volatile organic carbon (VOCs) and can be used in low-pressure (vacuum) environments; (2) they are nonflammable, the most complex and versatile of solvents in that they have the ability to interact via hydrogen bonding, p-p, n-p, dispersive, dipolar, electrostatic, and hydrophobic interactions and they are good solvents for a wide variety of organic and inorganic compounds; (3) they have physicochemical properties (such as the solvency for inorganic compounds, water, organic compounds and polymer) that can be altered/controlled by judicious selection of the cation and/or anion [1][2][3] . Thus far, current new ionic liquids design and their physicochemical properties in catalysis, solvency and electrochemistry application are the focus in research. However, few articles reported the surface activity of ionic liquids [4][5][6] ; many ionic liquids were reported without surface activities and with high viscosity, which limits their application in more extensive field [7,8] .Lactam-structure compounds existing in nature are well known, such as penicillin and Skin Moist Factor L-pyrrolidone-5-carboxylic acid. Moreover, 2-pyrrolidone exists in nature as itself or the middle product of metabolism. N-methyl-2-pyrrolidone is widely used as "super solvent" in industry and other areas because of its super solvency. Thereby, ionic liquids composed of lactam-structure should have excellent solvency and biocompatibility. MacFarlane et al. have investigated an interesting new family of RTILs, based on the N-alkylpyrrolidinium cation and three different anions, bis (triflioromethane sulfonyl)imide, tetrafluoroborate and dicyanamide, for applications in electrolytes and solvents [9][10][11][12] . Demberelnyamba et al. first synthesized RTILs based on N-vinyl-2-pyrrolidinonium cation cont...

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Section: Figurementioning

confidence: 99%

A novel family of green ionic liquids with surface activities

et al. 2007

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“…Because of the low cmc value of C16PyrCl, and because of the low K SV value for the chloride anion, the I 0 /I values for this surfactant could be estimated for the post-cmc region only. However, an intersection of the I 0 /I reference plot for NaCl with the extrapolated plot for this surfactant yielded a cmc value of 0.85 mM, which fits the literature data in the range of 0.74 to 1.1 mM fairly well, depending upon the author and technique applied [4,[20][21][22]. For C12PyrCl the procedure applied yielded a cmc value of 16.5 mM, which again fairly well agrees with previous potentiometric data of 16.3 [23] and 16.5 mM [7] and with a number of other literature values varying within the limits of 14-17 mM (or mmol/kg) [24,25].…”

Section: Resultsmentioning

confidence: 60%

10-Methylacridinium ion as a fluorimetric probe measuring the activity of halide anions in aqueous solutions of cationic surfactants

Czapkiewicz¹,

Długołęcka²,

Tutaj³

2004

Journal of Colloid and Interface Science

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“…Images of the drop can be captured automatically at certain frequencies over a period of several hours depending on the time duration of the test. These digitized pendant drop images can be stored on the computer to calculate the surface tension values as a function of the length of time (Arashiro and Demarquette, 1999;Gunde et al, 2001;Semmler and Kohler, 1999). This method involves the determination of the profile of a drop of one liquid suspended in another liquid at mechanical equilibrium.…”

Section: Wwwintechopencommentioning

confidence: 99%