Synergism and formation of vesicle gels in salt-free catanionic hydrocarbon/fluorocarbon surfactant mixtures | |
Department | 清洁能源化学与材料实验室 |
Yang M(杨美)1,4; Hao JC(郝京诚)1,3; Li HG(李洪光)1,2; Li HG(李洪光) | |
The second department | 固体润滑国家重点实验室 |
2014 | |
Source Publication | RSC Advances |
ISSN | 2046-2069 |
Volume | 4Issue:76Pages:40595-40605 |
Abstract | The surface and bulk properties of salt-free catanionic surfactant mixtures of a zwitterionic surfactant (tetradecyldimethylaminoxide, C14DMAO), and two partially fluorinated carboxylic acids (C6F13C2H4OC2H4COOH, TFOPA and C8F17C2H4OC2H4COOH, HFDPA) in aqueous solutions were studied. Surface tension measurements showed that strong synergism existed when C14DMAO was mixed with TFOPA or HFDPA, which induces a lower critical micellar concentration (cmc) and a lower surface tension at cmc (γcmc) compared to the individual surfactants. The phase behavior of both C14DMAO/TFOPA and C14DMAO/HFDPA systems in bulk aqueous solution is rich. When the molar ratio of TFOPA (or HFDPA) to C14DMAO was increased, an isotropic L1 phase, an L1/Lα two-phase region, a single Lα phase, and an L1/precipitate two-phase region, were successively observed. At a C14DMAO concentration of 300 mmol L−1, the formation of gels that contain densely packed vesicles occurred. Rheological measurements showed that the viscoelasticity of the vesicle gels depends on the mixing molar ratio of the anionic surfactant to C14DMAO and total surfactant concentration, but is almost independent of temperature. IR spectra indicate that the hydrocarbon chains adopt a highly ordered all-trans conformation while the fluorinated chains adopt a disordered gauche conformation. Differential scanning calorimetry (DSC) measurements showed that the alkyl chains are mainly in a liquid crystalline state at room temperature. |
Subject Area | 材料科学与物理化学 |
DOI | 10.1039/c4ra07794f |
Funding Organization | the National Natural Science Foundation of China (21033005);The National Key Basic Research Development Plan Project (2009CB930103);The Hundred Talents Program of the Chinese Academy of Sciences (Y20245YBR1) |
Indexed By | SCI |
If | 3.840 |
Language | 英语 |
Funding Project | 柔性有机太阳能电池研究组 |
compositor | 第一作者单位 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.licp.cn/handle/362003/6620 |
Collection | 清洁能源化学与材料实验室 固体润滑国家重点实验室(LSL) |
Corresponding Author | Li HG(李洪光) |
Affiliation | 1.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China 2.Chinese Acad Sci, Lanzhou Inst Chem Phys, Lab Clean Energy Chem & Mat, Lanzhou 730000, Peoples R China 3.Shandong Univ, Key Lab Colloid & Interface Chem, Minist Educ, Jinan 250100, Peoples R China 4.Chinese Acad Sci, Grad Sch, Beijing 100080, Peoples R China |
Recommended Citation GB/T 7714 | Yang M,Hao JC,Li HG,et al. Synergism and formation of vesicle gels in salt-free catanionic hydrocarbon/fluorocarbon surfactant mixtures[J]. RSC Advances,2014,4(76):40595-40605. |
APA | Yang M,Hao JC,Li HG,&李洪光.(2014).Synergism and formation of vesicle gels in salt-free catanionic hydrocarbon/fluorocarbon surfactant mixtures.RSC Advances,4(76),40595-40605. |
MLA | Yang M,et al."Synergism and formation of vesicle gels in salt-free catanionic hydrocarbon/fluorocarbon surfactant mixtures".RSC Advances 4.76(2014):40595-40605. |
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