Aggregation behavior of nonionic surfactants in ionic liquid mixtures

被引：29

作者：

Inoue, Tohru ^{[1
]}

Kawashima, Kazuaki ^{[1
]}

Miyagawa, Yuji ^{[1
]}

机构：

[1] Fukuoka Univ, Dept Chem, Fac Sci, Jonan Ku, Fukuoka 8140180, Japan

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2011年 / 363卷 / 01期

关键词：

Nonionic surfactant; Ionic liquid mixture; Surfactant aggregation in ionic liquid mixture; Surfactant-ionic liquid interaction; H-1; NMR; Dynamic light-scattering; BINARY-MIXTURES; FLUORINATED SURFACTANT; MICELLE FORMATION; POLAR; SEPARATION; CATALYSIS;

D O I：

10.1016/j.jcis.2011.06.052

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We investigated the aggregation behavior of polyoxyethylene (POE)-type nonionic surfactants in ionic liquid mixtures composed of 1-ethyl- and 1-hexyl-3-methylimidazolium tetrafluoroborates (emimBF(4) and hmimBF(4), respectively) by means of H-1 NMR chemical shift analysis and dynamic light-scattering measurements. The surfactants do not aggregate in hmimBF(4), whereas they are essentially immiscible with emimBF(4). That is, the surfactants are highly solvophilic to hmimBF(4), while are highly solvophobic to emimBF(4). In mixtures of emimBF(4) and hmimBF(4) micellization was observed. The critical micelle concentration (cmc) decreased and the mean hydrodynamic diameter of micelles, and hence, the micellar aggregation number, increased with increase in mole fraction of emimBF(4) in the ionic liquid mixture. H-1 NMR chemical shift analysis revealed that hmimBF(4) interacts with surfactant molecules preferentially in the ionic liquid mixture through interaction of hexyl groups with the surfactant hydrocarbon chains. The present work demonstrates that solvent quality can be controlled by mixing two ionic liquids to induce self-aggregation of amphiphilic molecules. (C) 2011 Elsevier Inc. All rights reserved.

引用

页码：295 / 300

页数：6

共 42 条

[1]

Alexandridis P., 2000, Amphiphilic Block Copolymers: Self-Assembly and Application

[2] Nano-engineering block copolymer aggregates for drug delivery [J].

Allen, C ;

Maysinger, D ;

Eisenberg, A .

COLLOIDS AND SURFACES B-BIOINTERFACES, 1999, 16 (1-4) :3-27

[3] Surfactant solvation effects and micelle formation in ionic liquids [J].

Anderson, JL ;

Pino, V ;

Hagberg, EC ;

Sheares, VV ;

Armstrong, DW .

CHEMICAL COMMUNICATIONS, 2003, (19) :2444-2445

[4]

[Anonymous], ANGEW CHEM

[5] CO2 capture by a task-specific ionic liquid [J].

Bates, ED ;

Mayton, RD ;

Ntai, I ;

Davis, JH .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2002, 124 (06) :926-927

[6] Amineborane-based chemical hydrogen storage: Enhanced ammonia borane dehydrogenation in ionic liquids [J].

Bluhm, Martin E. ;

Bradley, Mark G. ;

Butterick, Robert, III ;

Kusari, Upal ;

Sneddon, Larry G. .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2006, 128 (24) :7748-7749

[7] Self-assembly of tetradecyltrimethylammonium bromide in glycerol aqueous mixtures:: A thermodynamic and structural study [J].

Carnero Ruiz, C. ;

Diaz-Lopez, L. ;

Aguiar, J. .

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 2007, 305 (02) :293-300

[8] Homogeneous catalysis - new approaches to catalyst separation, recovery, and recycling [J].

Cole-Hamilton, DJ .

SCIENCE, 2003, 299 (5613) :1702-1706

[9] Ionic liquid (molten salt) phase organometallic catalysis [J].

Dupont, J ;

de Souza, RF ;

Suarez, PAZ .

CHEMICAL REVIEWS, 2002, 102 (10) :3667-3691

[10] Solvatochromic probe behavior within ternary room-temperature ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate plus ethanol plus water solutions [J].

Fletcher, KA ;

Pandey, S .

JOURNAL OF PHYSICAL CHEMISTRY B, 2003, 107 (48) :13532-13539

← 1 2 3 4 5 →