Hydrogen Ion Titration of Long Alkyl Chain Amine Oxide Micelles

Kakehashi, Rie; Yamamura, Shingo; Tokai, Naoji; Takeda, Takeshi; Kaneda, Ken'ichi; Yoshinaga, Koji; Maéda, Hiroshi

doi:10.1006/jcis.2001.7884

Cited by 31 publications

(48 citation statements)

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“…The solution properties and the surface properties also vary with pH. The pH (the protonation degree) dependence of the various solution properties, such as the titration behavior [1][2][3][4][5][6][7][8][9][10][11] , the critical micelle concentration (cmc) [12][13][14][15][16][17] , the micelle aggregation number 18,19) , the micelle size 7,18,20) , and the aggregate structures [21][22][23][24][25][26] , received much attention. In particular, it is noteworthy that the cmc values and the micelle aggregation number for dodecyldimethylamine oxide (C12DMAO) showed minimum and maximum, respectively, when the degree of ionization, a, is around 0.5 (that is, cationic species: nonionic species ≈ 1:1) 19) .…”

Section: Introductionmentioning

confidence: 99%

“…The short-range attractive interaction must be related to the distance between the polar head groups on the micellar surface. The amine oxides without amide group, C10DMAO, C12DHEAO, and C14DHEAO, could form the micelles with larger curvatures than CnDMAO (n = 12, 14, and 16) [8][9][10][11] . 10) .…”

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confidence: 99%

“…The values of pK M for C12AmC3 and the other amine oxides 8) are summarized in . Some pK 1 values are listed as well.…”

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confidence: 99%

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Protonation Behavior and Stability of Micelles of N-Lauroylaminoalkyl-Dimethylamine Oxides-Effects of Added Salt Concentration and Spacer Length

et al. 2009

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The protonation behavior and the stability of micelles of N-lauroylaminopropyl-N',N'-dimethylamine oxide (C12AmCn; n=3) were studied by the hydrogen ion titration and the equilibrium surface tension measurement. The surface potential of C12AmC3 micelles estimated from the results of hydrogen ion titration was lower than that of dodecyldimethylamine oxide micelles at added NaCl concentration, C S , of 0.1M. The critical micelle concentration (cmc) estimated from surface tension measurements revealed that a reversal of the stability of the cationic and the nonionic micelles of C12AmC3 takes place in the range of C S higher than about 0.2M, that is, the cationic micelles become more stable than the nonionic ones in the range C S ≥ 0.2M. In addition, the surface tension measurements were carried out for C12AmCn with different spacer length, n, ranging from 2 to 6 methylene units at C S = 0.1M. The cmc values of nonionic species were kept at almost constant for n ≤ 4, while they decreased with n for n ≥ 4. The cmc values of cationic species also tended to decrease with n for n ≥ 4. These results were compared with those obtained for alkyldimethylamine oxides, and the effect of amide group and spacer groups introduced into amine oxide surfactants was discussed.

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%

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Protonation Behavior and Stability of Micelles of N-Lauroylaminoalkyl-Dimethylamine Oxides-Effects of Added Salt Concentration and Spacer Length

et al. 2009

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“…The pK 1 values of C8-x were similar to those of simple amine oxide surfactants, such as decyldimethylamine oxides pK 1 4.9 8 . Therefore, the first protonation was expected to occur in the amine oxide group.…”

Section: Hydrogen Ion Titrationmentioning

confidence: 55%

Protonation Behavior and Solution Properties of Amine Oxide Surfactants Containing a Pyridyl Group

et al. 2013

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“…[9,10] Mixtures of DDMAO and sodium dodecylsulfate (SDS) or dodecyltrimethyl ammonium bromide (DTAB) show excellent synergistic effects. Hydroxyl groups are common hydrophilic groups and are usually connected to surfactant molecules to obtain superior properties.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and properties of cocotriethoxylpropanediamine oxide

Song

et al. 2016

Journal of Dispersion Science and Technology

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A new kind of amine oxide surfactant -cocotriethoxylpropanediamine oxide (CTPDAO) -was synthesized by a two-step process. The molecular structure was characterized by FTIR spectra and 1 H NMR. The new surfactant showed high surface activity in aqueous solution in the surface tension measurement. Emulsifying capacity and wetting ability were studied in comparison to dodecyldimethylamine oxide (DDMAO). The results indicate that this new surfactant could reach the lowest surface tension of 30.4 mN m À 1 in aqueous solution with a critical micelle concentration (CMC) of 0.23 mmol L À 1 . The wetting ability of DDMAO is better than that of CTPDAO. Compared with CTPDAO, DDMAO shows a greater capacity to emulsify soybean oil, although CTPDAO is a better emulsifying agent for liquid paraffin. The foaming properties and thickening function of DDMAO and CTPDAO mixed with alcohol ether sulfate (AES) and dodecylbenzene sulfonate (LAS) were also investigated. The results show that CTPDAO is a superior foam stabilizer than DDMAO while CTPDAO and DDMAO both have excellent thickening functions. GRAPHICAL ABSTRACT ARTICLE HISTORY

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Hydrogen Ion Titration of Long Alkyl Chain Amine Oxide Micelles

Cited by 31 publications

References 31 publications

Protonation Behavior and Stability of Micelles of N-Lauroylaminoalkyl-Dimethylamine Oxides-Effects of Added Salt Concentration and Spacer Length

Protonation Behavior and Stability of Micelles of N-Lauroylaminoalkyl-Dimethylamine Oxides-Effects of Added Salt Concentration and Spacer Length

Protonation Behavior and Solution Properties of Amine Oxide Surfactants Containing a Pyridyl Group

Synthesis and properties of cocotriethoxylpropanediamine oxide

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