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231224s2016 xx |||||o 00| ||eng c |
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|a 10.1021/acs.langmuir.6b02616
|2 doi
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|a pubmed24n0880.xml
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|a DE-627
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|e rakwb
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|a eng
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| 100 |
1 |
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|a Kong, Weiwei
|e verfasserin
|4 aut
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| 245 |
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|a Redox-Controllable Interfacial Properties of Zwitterionic Surfactant Featuring Selenium Atoms
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|c 2016
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|a Text
|b txt
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|a ƒaComputermedien
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|a ƒa Online-Ressource
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|a Date Completed 06.06.2018
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|a Date Revised 06.06.2018
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a Control of interfacial properties (foaming and emulsification) plays an important role in industry. Here we developed a novel redox-responsive surfactant, 3-(11-benzylselanyl-undecyl)-dimethylammonium acetate (BSeUCB), using selenium atoms as an environmentally sensitive group. In a reduced state, BSeUCB aqueous solution showed good foaming and emulsification abilities as well as conventional betaine surfactants. After oxidization, BSeUCB transformed into a bola-type structure because of the presence of a new hydrophilic group (selenoxide), and thus the critical micellar concentration, equilibrium surface/interfacial tension, and molecular area at the interface correspondingly increase from 0.32 mM, 46.43 mN·m(-1), 5.30 mN·m(-1), and 0.61 nm(2) to 4.98 mM, 59.15 mN·m(-1), 18.29 mN·m(-1), and 1.22 nm(2), respectively, resulting in a greater amount of energy input required to produce foam or emulsion, and a less dense adsorption layer, i.e., poor foaming and emulsification ability. Such a conversion was reversibly controlled by simply adding a trace amount (<0.06 wt % of the dispersion) of oxidant (H2O2) and reductant (Na2SO3). The products of the redox reaction did not interfere in the switchability except at the first cycle. The oxidization was generally time-consuming, whereas the reduction was very fast
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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1 |
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|a Guo, Shuang
|e verfasserin
|4 aut
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|a Wu, Shaoqi
|e verfasserin
|4 aut
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| 700 |
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|a Liu, Xuefeng
|e verfasserin
|4 aut
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| 700 |
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|a Zhang, Yongmin
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 32(2016), 38 vom: 27. Sept., Seite 9846-53
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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| 773 |
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|g volume:32
|g year:2016
|g number:38
|g day:27
|g month:09
|g pages:9846-53
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|u http://dx.doi.org/10.1021/acs.langmuir.6b02616
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