A temperature dependent micellar change

Adderson, J E; Taylor, Henry L.

doi:10.1111/j.2042-7158.1964.tb07553.x

Cited by 1 publication

(5 citation statements)

References 4 publications

(2 reference statements)

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“…The CMCS have minimum values at specific temperatures ; these temperatures are chain length dependent. Similar effects have been observed in alkyl trimethylammonium, alkyl dimethylbenzylammonium and alkyl pyridinium bromides (Adderson & Taylor, 1964 and unpublished data of this laboratory). Decyl cationic surfactants have a minimum CMC at approximately 23-25', dodecyl at 18-20' and tetradecyl at 10".…”

Section: R E S U L T S a N D Discussionsupporting

confidence: 78%

“…The enthalpy and entropy changes are similar to those previously reported (Adderson & Taylor, 1964, 1967 that is that for the shorter chain compounds the enthalpy of micellization is positive at room temperature and becomes negative with temperature increase. For the tetradecyl compound this transition occurs at a lower temperature.…”

Section: Thermodynamic Parameterssupporting

confidence: 86%

“…If the electrical work to assemble the monomers is reduced, for instance due to a greater degree of counterion binding in higher homologues, the minimum will occur at a lower temperature. Change of counterion to one more readily bound has the same effect (Adderson & Taylor, 1964;Mukerjee & Ray, 1966). Increase in alkyl chain length with consequent increase in the area of water-hydrocarbon interface lost and the exothermic formation of a larger amount of "liquid hydrocarbon" micelle interior, will depress the temperature of the minimum CMC.…”

Section: Thermodynamic Parametersmentioning

confidence: 85%

“…The difference between these values gives the almost constant entropy of dilution (Adderson & Taylor, 1964).…”

Section: Thermodynamic Parametersmentioning

confidence: 98%

“…exchange water equilibrated with laboratory air (K = 1-91 x CMC values were determined according to Adderson & Taylor (1964) using ionohm-1 cm-1).…”

Section: M C Determinationsmentioning

confidence: 99%

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The effects of temperature on the critical micelle concentrations of alkyl α-picolinium bromides

Adderson

Taylor

1970

Journal of Pharmacy and Pharmacology

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The temperature dependence of the critical micelle concentrations of decyl, dodecyl and tetradecyl a-picolinium bromides has been determined by measurement of conductance. Constants for the equation relating log. CMC and alkyl chain length have been calculated for the temperature range 5" to 70", in increments of 5". An estimate of the effect of temperature upon the degree of counterion binding is recorded. Thermodynamic parameters have been calculated using the uncharged phase-separation model and a theoretical interpretation of the process of micellization given.

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Section: R E S U L T S a N D Discussionsupporting

confidence: 78%

Section: Thermodynamic Parameterssupporting

confidence: 86%

Section: Thermodynamic Parametersmentioning

confidence: 85%

“…The difference between these values gives the almost constant entropy of dilution (Adderson & Taylor, 1964).…”

Section: Thermodynamic Parametersmentioning

confidence: 98%

“…exchange water equilibrated with laboratory air (K = 1-91 x CMC values were determined according to Adderson & Taylor (1964) using ionohm-1 cm-1).…”

Section: M C Determinationsmentioning

confidence: 99%

See 3 more Smart Citations