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231224s2015 xx |||||o 00| ||eng c |
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|a 10.1021/acs.langmuir.5b02491
|2 doi
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|a pubmed24n0843.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 |
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|a Li, Yan
|e verfasserin
|4 aut
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|a Self-Assembly and Rheological Properties of a Pseudogemini Surfactant Formed in a Salt-Free Catanionic Surfactant Mixture in Water
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|c 2015
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|a Text
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|a ƒaComputermedien
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|a Date Completed 14.01.2016
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|a Date Revised 20.10.2015
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a The surface and bulk properties of bola-type dicarboxylic acid (sebacic acid, SA) and zwitterionic surfactant tetradecyldimethylamine oxide (C14DMAO) mixtures in aqueous solutions were studied. Surface tension measurements indicate a pronounced synergistic effect between SA and C14DMAO. In bulk aqueous solutions, rich phase behavior was observed with a varied SA-to-C14DMAO ratio (ρ) and a total surfactant concentration. Typically at ρ = 0.5, a novel pseudogemini surfactant (C14-S-C14) forms, driven by electrostatic interaction and hydrogen bonding. The C14-S-C14/H2O system exhibits rich phase behavior induced by the transition of aggregates. With increasing concentration of C14-S-C14, one can observe a viscous L1 phase, an L1/Lα two-phase region where a birefringent Lα phase is on the top of an L1 phase, a single Lα phase, and finally a mixture of an Lα phase and a precipitate. Microstructures formed in the Lα phases were determined by freeze-fracture transmission electron microscopy (FF-TEM) and cryogenic-transmission electron microscopy (cryo-TEM) observations. Polymorphic aggregation behavior was observed with the formation of a variety of bilayer structures including unilamellar vesicles, onions, and open and hyperbranched bilayers. Rheological measurements showed that the Lα phases are viscoelastic and sensitive to temperature where a quick loss of viscoelasticity was observed at elevated temperature
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|a Journal Article
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|a Li, Hongguang
|e verfasserin
|4 aut
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|a Chai, Jinling
|e verfasserin
|4 aut
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|a Chen, Mengjun
|e verfasserin
|4 aut
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|a Yang, Qiao
|e verfasserin
|4 aut
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|a Hao, Jingcheng
|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 31(2015), 41 vom: 20. Okt., Seite 11209-19
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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| 773 |
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|g volume:31
|g year:2015
|g number:41
|g day:20
|g month:10
|g pages:11209-19
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|u http://dx.doi.org/10.1021/acs.langmuir.5b02491
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