Effect of Hydrophobic Chains on Solubilization of Hydrocarbon and Fluorocarbon Surfactant Mixtures in Aqueous Solution

Takata, Yasumitsu; Ohtsuka, Yuka; Ashida, Takumi

doi:10.5650/jos.ess19086

Cited by 7 publications

(1 citation statement)

References 12 publications

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“…One is to take advantage of the difference in solubilization power under different environments, and the other is to destroy the micelle itself due to external stimuli. In our previous study on the controlled release of solubilizates, we focused on the former method, i.e., the difference in the hydrophobicity between hydrocarbon and fluorocarbon materials [17]. It is well known that hydrocarbon materials are hardly miscible with fluorocarbon materials.…”

Section: Introductionmentioning

confidence: 99%

Study on Reversible Solubilization by Adjusting Surfactant Properties

Takata,

Uchikura

2023

Materials

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Solubilization allows us to dissolve hydrophobic materials in water and to carry them to where they are needed. The purpose of this study is to control solubilization, especially the release of solubilized materials, via external stimulation. An amphoteric surfactant, dodecyldimethyl(3-sulfopropyl)ammonium hydroxide inner salt (SB-12), was employed, and a pH change was chosen as the external stimulus. We measured the surface tension of an SB-12 solution via the Wilhelmy method, and the absorbance of a solubilized solution was determined using UV-Vis spectroscopy at various pH values. The surface tension was almost the same at any pH, contrary to our expectations. This result suggests that the adsorption behavior and micelle formation of SB-12 were not affected by pH very much. On the other hand, the solubilization behavior remarkably depended on the pH. In particular, the solubilization ability under the basic condition was much larger than that under the acidic and neutral conditions. Taking advantage of such a difference in solubilization ability under some pH conditions, the solubilized material could be completely removed from the solution. Thus, we clarified the mechanism of release for solubilized materials due to a pH change.

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Section: Introductionmentioning

confidence: 99%