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Cao X, Guo W, Zhu Q, Ge H, Yang H, Ke Y, Shi X, Lu X, Feng Y, Yin H. Supramolecular self-assembly of robust, ultra-stable, and high-temperature-resistant viscoelastic worm-like micelles. J Colloid Interface Sci 2023; 649:403-415. [PMID: 37354797 DOI: 10.1016/j.jcis.2023.06.086] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 06/09/2023] [Accepted: 06/14/2023] [Indexed: 06/26/2023]
Abstract
HYPOTHESIS Worm-like micelles are susceptible to heating owing to the fast dynamic exchange of molecules between micelles. Inhibition of such exchange could afford robust worm-like micelles, which is expected to largely improve rheology properties at high temperatures. EXPERIMENTS A cationic surfactant docosyl(trimethyl)azanium chloride (DCTAC) and a strongly hydrophobic organic counterion 3-hydroxy naphthalene-2-carboxylate (SHNC) were used for the worm-like micelles fabrication. The microstructure was characterized using cryogenic transmission electron microscopy and small-angle neutron scattering, and the interactions between DCTAC and SHNC were characterized using nuclear magnetic resonance spectroscopy. Rheometer was employed to measure the rheological properties of the solution. FINDINGS SHNC/DCTAC at the molar ration of 1:2 forms ultra-stable worm-like micelles, whose viscosity remain stable at temperature up to 130 °C. SHNC is found to strongly adsorbs on DCTAC micelle with the orientation on the surface of micelle, keeping the naphthalene backbone entire penetration into the palisade layer while both carboxylic and hydroxyl groups protrude out of the micelle. With temperature increasing, this adsorption further strengthens, resulting in the growth contour length and accompanying the enhancement of rheological properties. One SHNC molecule and two DCTAC molecules are speculated to form a stable complex via multiple interactions including hydrophobic, cationic-π, and π-π interactions, which decreases the dynamic exchange of them between micelles. These findings are helpful to understand surfactant aggregates stability and assist the development of novel stable supramolecular nanostructures. Additionally, the excellent thermal stability of this worm-like micellar fluid makes it a potential high-temperature resistant clean fracturing fluid for deep oil reservoirs.
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Affiliation(s)
- Xiaoqin Cao
- Polymer Research Institute, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, PR China
| | - Weiluo Guo
- Polymer Research Institute, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, PR China
| | - Qi Zhu
- CNPC Bohai Drilling Engineering Co., Ltd, Tianjin 300450, PR China
| | - Hongjiang Ge
- Oil Production Technology Institute, Dagang Oil Field Company PetroChina, Tianjin 300280, PR China
| | - Hua Yang
- Spallation Neutron Source Science Center, Dongguan 523803, PR China; Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, PR China
| | - Yubin Ke
- Spallation Neutron Source Science Center, Dongguan 523803, PR China; Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, PR China
| | - Xiaohuo Shi
- Instrumentation and Service Center for Molecular Sciences, Westlake University, Hangzhou 310024, PR China
| | - Xingyu Lu
- Instrumentation and Service Center for Molecular Sciences, Westlake University, Hangzhou 310024, PR China
| | - Yujun Feng
- Polymer Research Institute, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, PR China
| | - Hongyao Yin
- Polymer Research Institute, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, PR China.
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Shibaev AV, Ospennikov AS, Kuznetsova EK, Kuklin AI, Aliev TM, Novikov VV, Philippova OE. Universal Character of Breaking of Wormlike Surfactant Micelles by Additives of Different Hydrophobicity. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:4445. [PMID: 36558298 PMCID: PMC9781539 DOI: 10.3390/nano12244445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 11/30/2022] [Accepted: 12/12/2022] [Indexed: 06/17/2023]
Abstract
Wormlike surfactant micelles are widely used in various applications including fracturing technology in oil industry, template synthesis of different nanoobjects, micellar copolymerization of hydrophilic and hydrophobic monomers, and so forth. Most of those applications suggest the solubilization of different additives in the micelles. The present paper is aimed at the comparative study of the effect of the solubilization of hydrophobic (n-decane and 1-phenylhexane) and hydrophilic (N-isopropylacrylamide and acrylamide) substances on the rheological properties and structure of the micelles using several complementary techniques including rheometry, small angle neutron scattering, dynamic light scattering, and diffusion ordered NMR spectroscopy. For these studies, mixed micelles of potassium oleate and n-octyltrimethylammonium bromide containing the excess of either anionic or cationic surfactants were used. It was shown that hydrophobic additives are completely solubilized inside the micelles being localized deep in the core (n-decane, 1-phenylhexane) or near the core/corona interface (1-phenylhexane). At the same time, only a small fraction of hydrophilic additives (14% of N-isopropylacrylamide and 4% of acrylamide) penetrate the micelles being localized at the corona area. Despite different localization of the additives inside the micelles, all of them induce the breaking of wormlike micelles with the formation of either ellipsoidal microemulsion droplets (in the case of hydrophobic additives) or ellipsoidal surfactant micelles (in the case of hydrophilic additives). The breaking of micelles results in the drop of viscosity of the solution up to water value. The main result of this paper consists in the observation of the fact that for all the additives under study, the dependences of the viscosity on the volume fraction of additive lie on the same master curve being shifted along the volume fraction axis by a certain factor depending on the hydrophobicity of the added species. Those data are quite useful for various applications of wormlike surfactant micelles suggesting the solubilization of different additives inside them.
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Affiliation(s)
| | | | | | - Alexander I. Kuklin
- Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, 141980 Dubna, Russia
- Moscow Institute of Physics and Technology, 141701 Dolgoprudny, Russia
| | - Teimur M. Aliev
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 119991 Moscow, Russia
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DeFrates KG, Engström J, Sarma NA, Umar A, Shin J, Cheng J, Xie W, Pochan D, Omar AK, Messersmith PB. The influence of molecular design on structure-property relationships of a supramolecular polymer prodrug. Proc Natl Acad Sci U S A 2022; 119:e2208593119. [PMID: 36279462 PMCID: PMC9636931 DOI: 10.1073/pnas.2208593119] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Accepted: 09/30/2022] [Indexed: 11/18/2022] Open
Abstract
Supramolecular self-assemblies of hydrophilic macromolecules functionalized with hydrophobic, structure-directing components have long been used for drug delivery. In these systems, loading of poorly soluble compounds is typically achieved through physical encapsulation during or after formation of the supramolecular assembly, resulting in low encapsulation efficiencies and limited control over release kinetics, which are predominately governed by diffusion and carrier degradation. To overcome these limitations, amphiphilic prodrugs that leverage a hydrophobic drug as both the therapeutic and structure-directing component can be used to create supramolecular materials with higher loading and controlled-release kinetics using biodegradable or enzymatically cleavable linkers. Here, we report the design, synthesis, and characterization of a library of supramolecular polymer prodrugs based on poly(ethylene glycol) (PEG) and the proregenerative drug 1,4-dihydrophenonthrolin-4-one-3-carboxylic acid (DPCA). Structure-property relationships were elucidated through experimental characterization of prodrug behavior in both the wet and dry states using scattering techniques and electron microscopy and corroborated by coarse-grained modeling. Molecular architecture and the hydrophobic-to-hydrophilic ratio of PEG-DPCA conjugates strongly influenced their physical state in water, ranging from fully soluble to supramolecular spherical assemblies and nanofibers. Molecular design and supramolecular structure, in turn, were shown to dramatically alter hydrolytic and enzymatic release and cellular transport of DPCA. In addition to potentially expanding therapeutic options for DPCA through control of supramolecular assemblies, the design principles elaborated here may inform the development of other supramolecular prodrugs based on hydrophobic small-molecule compounds.
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Affiliation(s)
- Kelsey G. DeFrates
- Department of Bioengineering, University of California, Berkeley, CA 94720
| | - Joakim Engström
- Department of Bioengineering, University of California, Berkeley, CA 94720
- Department of Materials Science and Engineering, University of California, Berkeley, CA 94720
| | - Nivedina A. Sarma
- Department of Materials Science and Engineering, University of California, Berkeley, CA 94720
| | - Athiyya Umar
- Department of Bioengineering, University of California, Berkeley, CA 94720
| | - Jisoo Shin
- Department of Bioengineering, University of California, Berkeley, CA 94720
- Department of Materials Science and Engineering, University of California, Berkeley, CA 94720
| | - Jing Cheng
- Department of Bioengineering, University of California, Berkeley, CA 94720
- Department of Materials Science and Engineering, University of California, Berkeley, CA 94720
| | - Weiran Xie
- Department of Materials Science and Engineering, University of Delaware, Newark, DE 19716
| | - Darrin Pochan
- Department of Materials Science and Engineering, University of Delaware, Newark, DE 19716
| | - Ahmad K. Omar
- Department of Materials Science and Engineering, University of California, Berkeley, CA 94720
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720
| | - Phillip B. Messersmith
- Department of Bioengineering, University of California, Berkeley, CA 94720
- Department of Materials Science and Engineering, University of California, Berkeley, CA 94720
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720
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Yin Q, Tian Q, Doutch J, Frimpong AO, Xu X, Yin H, Li P, Feng Y. An insight into the thermo-thickening behavior of wormlike micellar solutions based on ultra-long-chain surfactants. Phys Chem Chem Phys 2022; 24:11112-11123. [PMID: 35475436 DOI: 10.1039/d2cp00687a] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Generally, the solution viscosity of wormlike micelles (WLMs) assembled from common surfactants decreases upon an increase in the temperature, following the Arrhenius law. However, abnormal thermo-thickening behavior has been repeatedly observed for WLMs formed by ultra-long-chain (≥C18) surfactants. It would be useful to unravel the mechanism behind this phenomenon. Here, three C22-tailed surfactants with an erucyl tail, two of them containing carboxylate or sulfonate head groups (UC22DAB and UC22DAS) and a cationic one with an iodide counterion (UC22DAI), and two C18-tailed betaines with olemido- and stearamidopropyl hydrophobic chains (UC18DAS and C18DAS) were characterised in terms of their viscosity and viscoelastic behavior with increasing temperature to examine the roles of head groups, tail length and tail nature. Their micellar structures were elucidated at various temperatures using small angle neutron scattering (SANS), small angle neutron X-ray scattering (SAXS) and molecular dynamics simulation. It is found that the thermo-thickening behavior of ultra-long-chain surfactants is ascribed to the prolonged persistence length and increased entanglement points. When the temperature is increased, an increase in viscosity is always accompanied by a longer persistent length, thus a larger hydrodynamic volume. The iceberg structure around the hydrophobic tail of surfactants can be destroyed at high temperatures leading to the self-assembly of these surfactants. In this self-assembly process, compared to cationic surfactants, zwitterionic surfactants can form WLMs more readily due to weak electrostatic repulsions between their head groups; the longer tails give the surfactants enhanced hydrophobicity to form WLMs with a long breaking time; the cis-unsaturation and the resulting kink in the hydrophobic tails give the surfactants good solubility, which is not conducive to the formation of micelles. In brief, the zwitterionic, longer tail and saturated tail surfactants can form WLMs with a prolonged persistence length at elevated temperatures.
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Affiliation(s)
- Quan Yin
- Polymer Research Institute, State Key Laboratory Polymer Materials Engineering, Sichuan University, Chengdu 610065, China.
| | - Qiang Tian
- State Key Laboratory of Environment-Friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China
| | - James Doutch
- ISIS Neutron and Muon Source, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Didcot, OXON OX11 0QX, UK.
| | - Asante O Frimpong
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Xiao Xu
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Hongyao Yin
- Polymer Research Institute, State Key Laboratory Polymer Materials Engineering, Sichuan University, Chengdu 610065, China.
| | - Peixun Li
- ISIS Neutron and Muon Source, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Didcot, OXON OX11 0QX, UK.
| | - Yujun Feng
- Polymer Research Institute, State Key Laboratory Polymer Materials Engineering, Sichuan University, Chengdu 610065, China.
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Shibaev AV, Aleshina AL, Arkharova NA, Orekhov AS, Kuklin AI, Philippova OE. Disruption of Cationic/Anionic Viscoelastic Surfactant Micellar Networks by Hydrocarbon as a Basis of Enhanced Fracturing Fluids Clean-Up. NANOMATERIALS 2020; 10:nano10122353. [PMID: 33260867 PMCID: PMC7761115 DOI: 10.3390/nano10122353] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Revised: 11/21/2020] [Accepted: 11/25/2020] [Indexed: 11/16/2022]
Abstract
Studies of the effects produced by the solubilization of hydrophobic substances by micellar aggregates in water medium are quite important for applications of viscoelastic surfactant solutions for enhanced oil recovery (EOR), especially in hydraulic fracturing technology. The present paper aims at the investigation of the structural transformations produced by the absorption of an aliphatic hydrocarbon (n-decane) by mixed wormlike micelles of cationic (n-octyltrimethylammonium bromide, C8TAB) and anionic (potassium oleate) surfactants enriched by C8TAB. As a result of contact with a small amount (0.5 wt%) of oil, a highly viscoelastic fluid is transformed to a water-like liquid. By small-angle neutron scattering (SANS) combined with cryo-TEM, it was shown that this is due to the transition of long wormlike micelles with elliptical cross-sections to ellipsoidal microemulsion droplets. The non-spherical shape was attributed to partial segregation of longer- and shorter-tail surfactant molecules inside the surfactant monolayer, providing an optimum curvature for both of them. As a result, the long-chain surfactant could preferably be located in the flatter part of the aggregates and the short-chain surfactant—at the ellipsoid edges with higher curvature. It is proven that the transition proceeds via a co-existence of microemulsion droplets and wormlike micelles, and upon the increase of hydrocarbon content, the size and volume fraction of ellipsoidal microemulsion droplets increase. The internal structure of the droplets was revealed by contrast variation SANS, and it was shown that, despite the excess of the cationic surfactant, the radius of surfactant shell is controlled by the anionic surfactant with longer tail. These findings open a way for optimizing the performance of viscoelastic surfactant fluids by regulating both the mechanical properties of the fluids and their clean-up from the fracture induced by contact with hydrocarbons.
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Affiliation(s)
- Andrey V. Shibaev
- Physics Department, Lomonosov Moscow State University, 119991 Moscow, Russia; (A.L.A.); (O.E.P.)
- Correspondence: ; Tel.: +7-495-939-1464
| | - Anna L. Aleshina
- Physics Department, Lomonosov Moscow State University, 119991 Moscow, Russia; (A.L.A.); (O.E.P.)
| | | | - Anton S. Orekhov
- National Research Centre “Kurchatov Institute”, 123182 Moscow, Russia;
- Moscow Institute of Physics and Technology, 141701 Dolgoprudny, Russia;
| | - Alexander I. Kuklin
- Moscow Institute of Physics and Technology, 141701 Dolgoprudny, Russia;
- Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, 141980 Dubna, Russia
| | - Olga E. Philippova
- Physics Department, Lomonosov Moscow State University, 119991 Moscow, Russia; (A.L.A.); (O.E.P.)
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Choi F, Chen R, Acosta EJ. Predicting the effect of additives on wormlike micelle and liquid crystal formation and rheology with phase inversion phenomena. J Colloid Interface Sci 2019; 564:216-229. [PMID: 31911226 DOI: 10.1016/j.jcis.2019.12.105] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2019] [Revised: 11/10/2019] [Accepted: 12/24/2019] [Indexed: 11/27/2022]
Abstract
HYPOTHESIS Surfactant-based viscoelastic fluids are used in consumer products such as body wash, cosmetics, and in hydraulic fracturing fluids to suspend proppant, among others. The solubilization of oil within these fluids changes the curvature of the surfactant and their nanostructure and rheological properties. The curvature-based hydrophilic-lipophilic-difference + net-average-curvature (HLD-NAC) framework may be able to quantify curvature changes and predict the formulation conditions required to obtain viscoelasticity. EXPERIMENTS Phase inversion experiments were conducted for combinations of commercial-grade C8, C10 and C12 tetrapropylene glycol ether sulfate (extended) surfactant and sodium dihexyl sulfosuccinate with oil to obtain the HLD-NAC parameters. Wormlike micelles (WLMs) and liquid crystals (LCs) were then formulated and characterized. The transition from spherical micelles to WLMs/LCs at different oil contents was identified and compared with phase transitions predicted via the HLD-NAC model. FINDINGS The spherical micelle to branched WLM/LC transition in surfactant + oil systems coincided with the water-continuous (Type I) to bicontinuous (Type III) microemulsion phase transition predicted with the HLD-NAC model. Using this finding, the transition of commercial-grade sodium laureth sulfate (SLES) micelles to viscoelastic LCs containing various oils was predicted using the HLD-NAC. The HLD-NAC also predicted the presence of a secondary peak in viscosity obtained in "salt curves" experiments associated with branched WLMs and LCs.
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Affiliation(s)
- Francis Choi
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, Ontario, Canada
| | - Ruixu Chen
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, Ontario, Canada
| | - Edgar J Acosta
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, Ontario, Canada.
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Zoratto N, Grillo I, Matricardi P, Dreiss CA. Supramolecular gels of cholesterol-modified gellan gum with disc-like and worm-like micelles. J Colloid Interface Sci 2019; 556:301-312. [DOI: 10.1016/j.jcis.2019.08.057] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2019] [Revised: 08/11/2019] [Accepted: 08/15/2019] [Indexed: 01/23/2023]
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Kwiatkowski AL, Molchanov VS, Philippova OE. Polymer-like Wormlike Micelles of Ionic Surfactants: Structure and Rheological Properties. POLYMER SCIENCE SERIES A 2019. [DOI: 10.1134/s0965545x19020081] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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9
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Yin H, Feng Y, Li P, Doutch J, Han Y, Mei Y. Cryogenic viscoelastic surfactant fluids: Fabrication and application in a subzero environment. J Colloid Interface Sci 2019; 551:89-100. [PMID: 31075637 DOI: 10.1016/j.jcis.2019.05.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Revised: 05/01/2019] [Accepted: 05/03/2019] [Indexed: 01/31/2023]
Abstract
HYPOTHESIS Current viscoelastic surfactant (VES) aqueous solutions quickly freeze and thus, lose their viscoelasticity and flowability at subzero temperatures, limiting their practical use in cold environments. Therefore, it is highly desirable to develop cryo-VES fluids with freezing point far below 0 °C. Since addition of alcohol antifreeze greatly reduces the freezing point of water, cryo-VES fluids might be generated in the presence of alcohols. EXPERIMENTS The self-assembly behavior of a C22-tailed surfactant, erucyl dimethyl amidopropyl betaine (EDAB), in eight alcohol/water cosolvents from 20 to -20 °C was studied by pyrene fluorescent probe, cryo-TEM imaging and cryo-SNAS characterization, and the solution properties of the mixtures were investigated by rheological test. FINDINGS It is found that the alcohol molecular structure, content and temperature play crucial roles dominating EDAB self-assembly behavior. Monohydric alcohols are unfavorable for micelles formation and growth, thus VES fluids cannot be obtained in the presence of 50 vol% monohydric alcohols even at subfreezing temperatures. On the contrary, dihydric and trihydric alcohols with short alkyl chain show less negative effect on EDAB micellization. Thus, cryo-VES fluids can be formed in the presence of 50 vol% ethylene glycol, 1,3-propanediol or glycerol due to the formation of wormlike micelles. These cryo-VES fluids with different alcohols exhibit different temperature-sensitivity and rheological properties, furnishing them with potential applications in anti-freeze hydraulic fracking fluids and aircraft deicing/anti-icing fluids.
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Affiliation(s)
- Hongyao Yin
- Polymer Research Institute, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, PR China
| | - Yujun Feng
- Polymer Research Institute, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, PR China.
| | - Peixun Li
- ISIS Neutron and Muon Source, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Didcot, OXON OX11 0QX, UK
| | - James Doutch
- ISIS Neutron and Muon Source, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Didcot, OXON OX11 0QX, UK
| | - Yixiu Han
- The Second Research Institute of Civil Aviation Administration of China (CAAC), Chengdu 610041, PR China
| | - Yongjun Mei
- The Second Research Institute of Civil Aviation Administration of China (CAAC), Chengdu 610041, PR China
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Yin H, Feng Y, Li P, Doutch J, Han Y, Mei Y. Cryogenic wormlike micelles. SOFT MATTER 2019; 15:2511-2516. [PMID: 30839046 DOI: 10.1039/c9sm00068b] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Cryogenic wormlike micellar solutions which possess a freezing point far below 0 °C while retaining rheological properties similar to those of ordinary wormlike micellar solutions are fabricated from the self-assembly of a C22-tailed monounsaturated zwitterionic surfactant, erucyl dimethyl amidopropyl betaine, in an ethylene glycol/water co-solvent at subzero temperature. Such fluids may find potential applications in fields where viscoelasticity is highly desired at subfreezing temperatures.
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Affiliation(s)
- Hongyao Yin
- Polymer Research Institute, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, P. R. China.
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Choi F, Acosta EJ. Oil-induced formation of branched wormlike micelles in an alcohol propoxysulfate extended surfactant system. SOFT MATTER 2018; 14:8378-8389. [PMID: 30310914 DOI: 10.1039/c8sm01673a] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The addition of oil to an extended surfactant-water system (sodium tetrapropylene glycol (2-ethyl)octyl ether sulfate, C10PO4SO4Na) induces the elongation of spherical micelles into oil-swollen branched wormlike micelles (WLMs) near the phase inversion point of the surfactant-oil-water (SOW) system. The hydrophilic-lipophilic-difference (HLD) framework, which has been associated with surfactant curvature, was successfully used to predict the conditions under which WLMs are produced for both polar and non-polar oils. At HLD = 0, the formation of low-curvature surfactant structures including WLMs and liquid crystals are favored in water-rich systems. Micellar growth begins around HLD = -0.5, and reaches a plateau upon the formation of a branched WLM network at HLD = 0. Above the entanglement concentration, the branched WLMs exhibit Maxwell and shear thinning behavior which is suitable for the suspension of nanoparticles, among others.
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Affiliation(s)
- Francis Choi
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, Ontario, Canada.
| | - Edgar J Acosta
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, Ontario, Canada.
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Danov KD, Kralchevsky PA, Stoyanov SD, Cook JL, Stott IP, Pelan EG. Growth of wormlike micelles in nonionic surfactant solutions: Quantitative theory vs. experiment. Adv Colloid Interface Sci 2018; 256:1-22. [PMID: 29804690 DOI: 10.1016/j.cis.2018.05.006] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Revised: 05/15/2018] [Accepted: 05/16/2018] [Indexed: 11/25/2022]
Abstract
Despite the considerable advances of molecular-thermodynamic theory of micelle growth, agreement between theory and experiment has been achieved only in isolated cases. A general theory that can provide self-consistent quantitative description of the growth of wormlike micelles in mixed surfactant solutions, including the experimentally observed high peaks in viscosity and aggregation number, is still missing. As a step toward the creation of such theory, here we consider the simplest system - nonionic wormlike surfactant micelles from polyoxyethylene alkyl ethers, CiEj. Our goal is to construct a molecular-thermodynamic model that is in agreement with the available experimental data. For this goal, we systematized data for the micelle mean mass aggregation number, from which the micelle growth parameter was determined at various temperatures. None of the available models can give a quantitative description of these data. We constructed a new model, which is based on theoretical expressions for the interfacial-tension, headgroup-steric and chain-conformation components of micelle free energy, along with appropriate expressions for the parameters of the model, including their temperature and curvature dependencies. Special attention was paid to the surfactant chain-conformation free energy, for which a new more general formula was derived. As a result, relatively simple theoretical expressions are obtained. All parameters that enter these expressions are known, which facilitates the theoretical modeling of micelle growth for various nonionic surfactants in excellent agreement with the experiment. The constructed model can serve as a basis that can be further upgraded to obtain quantitative description of micelle growth in more complicated systems, including binary and ternary mixtures of nonionic, ionic and zwitterionic surfactants, which determines the viscosity and stability of various formulations in personal-care and house-hold detergency.
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Fan H, Zheng T, Chen H, Huang J, Wei Z, Kang W, Dai C, Zeng H. Viscoelastic Surfactants with High Salt Tolerance, Fast-Dissolving Property, and Ultralow Interfacial Tension for Chemical Flooding in Offshore Oilfields. J SURFACTANTS DETERG 2018. [DOI: 10.1002/jsde.12042] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Haiming Fan
- Shandong Provincial Key Laboratory of Oilfield Chemistry, School of Petroleum Engineering; China University of Petroleum (East China); Qingdao Shandong Province 266580 China
| | - Tong Zheng
- Shandong Provincial Key Laboratory of Oilfield Chemistry, School of Petroleum Engineering; China University of Petroleum (East China); Qingdao Shandong Province 266580 China
| | - Haolin Chen
- Shandong Provincial Key Laboratory of Oilfield Chemistry, School of Petroleum Engineering; China University of Petroleum (East China); Qingdao Shandong Province 266580 China
| | - Jun Huang
- Department of Chemical and Materials Engineering; University of Alberta, 116 Street and 85 Avenue; Edmonton Alberta T6G 2G6 Canada
| | - Zhiyi Wei
- Shandong Provincial Key Laboratory of Oilfield Chemistry, School of Petroleum Engineering; China University of Petroleum (East China); Qingdao Shandong Province 266580 China
| | - Wanli Kang
- Shandong Provincial Key Laboratory of Oilfield Chemistry, School of Petroleum Engineering; China University of Petroleum (East China); Qingdao Shandong Province 266580 China
| | - Caili Dai
- Shandong Provincial Key Laboratory of Oilfield Chemistry, School of Petroleum Engineering; China University of Petroleum (East China); Qingdao Shandong Province 266580 China
| | - Hongbo Zeng
- Department of Chemical and Materials Engineering; University of Alberta, 116 Street and 85 Avenue; Edmonton Alberta T6G 2G6 Canada
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Anachkov SE, Georgieva GS, Abezgauz L, Danino D, Kralchevsky PA. Viscosity Peak due to Shape Transition from Wormlike to Disklike Micelles: Effect of Dodecanoic Acid. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:4897-4907. [PMID: 29627989 DOI: 10.1021/acs.langmuir.8b00421] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Here, we have investigated the synergistic growth of long wormlike micelles and their transformation into disklike micelles, which occurs in three-component solutions composed of sodium lauryl ether sulfate (SLES; anionic), cocamidopropyl betaine (CAPB; zwitterionic), and dodecanoic acid (HC12; nonionic). The solution rheology is characterized in terms of zero-shear viscosities and characteristic times for micellar breaking and reptation. Furthermore, the microstructure evolution, leading to the observed rheological behavior, is revealed by cryo-transmission electron microscopy (TEM) micrographs. In all cases, the CAPB-to-SLES ratio is fixed, whereas the fatty acid concentration is varied. At a certain HC12 concentration, the solution viscosity passes through a maximum. The cryo-TEM imaging indicates that wormlike micelles appear before the peak, grow further up to the peak, and finally transform into disklike aggregates (a very rare micellar structure) after the peak. The transformation of worms into disks leads to a drop in viscosity because the length-to-thickness aspect ratio of the disks is significantly lower than that of the worms. In this article, we elucidate the structure-rheology relations in micellar solutions that might be applied for the design of personal-care and household formulations.
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Affiliation(s)
- Svetoslav E Anachkov
- Department of Chemical and Pharmaceutical Engineering, Faculty of Chemistry and Pharmacy , Sofia University , 1 James Bourchier Boulevard , Sofia 1164 , Bulgaria
| | - Gergana S Georgieva
- Department of Chemical and Pharmaceutical Engineering, Faculty of Chemistry and Pharmacy , Sofia University , 1 James Bourchier Boulevard , Sofia 1164 , Bulgaria
| | - Ludmila Abezgauz
- Faculty of Biotechnology and Food Engineering , Technion-Israel Institute of Technology , Haifa 3200000 , Israel
| | - Dganit Danino
- Faculty of Biotechnology and Food Engineering , Technion-Israel Institute of Technology , Haifa 3200000 , Israel
| | - Peter A Kralchevsky
- Department of Chemical and Pharmaceutical Engineering, Faculty of Chemistry and Pharmacy , Sofia University , 1 James Bourchier Boulevard , Sofia 1164 , Bulgaria
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15
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Rheological properties of wormlike micellar gels formed by novel bio-based isosorbide surfactants. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2017.07.037] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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16
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Kang W, Wang P, Fan H, Yang H, Dai C, Yin X, Zhao Y, Guo S. A pH-responsive wormlike micellar system of a noncovalent interaction-based surfactant with a tunable molecular structure. SOFT MATTER 2017; 13:1182-1189. [PMID: 28098315 DOI: 10.1039/c6sm02655a] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Responsive wormlike micelles are very useful in a number of applications, whereas it is still challenging to create dramatic viscosity changes in wormlike micellar systems. Here we developed a pH-responsive wormlike micellar system based on a noncovalent constructed surfactant, which is formed by the complexation of N-erucamidopropyl-N,N-dimethylamine (UC22AMPM) and citric acid at the molar ratio of 3 : 1 (EACA). The phase behavior, aggregate microstructure and viscoelasticity of EACA solutions were investigated by macroscopic appearance observation, rheological and cryo-TEM measurements. It was found that the phase behavior of EACA solutions undergoes transition from transparent viscoelastic fluids to opalescent solutions and then phase separation with white floaters upon increasing the pH. Upon increasing the pH from 2.03 to 6.17, the viscosity of wormlike micelles in the transparent solutions continuously increased and reached ∼683 000 mPa s at pH 6.17. As the pH was adjusted to 7.31, the opalescent solution shows a water-like flowing behaviour and the η0 rapidly declines to ∼1 mPa s. Thus, dramatic viscosity changes of about 6 magnitudes can be triggered by varying the pH values without any deterioration of the EACA system. This drastic variation in rheological behavior is attributed to the pH dependent interaction between UC22AMPM and citric acid. Furthermore, the dependence on concentration and temperature of the rheological behavior of EACA solutions was also studied to assist in obtaining the desired pH-responsive viscosity changes.
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Affiliation(s)
- Wanli Kang
- School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, P. R. China. and EOR Research Institute, China University of Petroleum (Beijing), Beijing 102249, P. R. China
| | - Pengxiang Wang
- School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, P. R. China.
| | - Haiming Fan
- School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, P. R. China.
| | - Hongbin Yang
- School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, P. R. China.
| | - Caili Dai
- School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, P. R. China.
| | - Xia Yin
- School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, P. R. China.
| | - Yilu Zhao
- School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, P. R. China.
| | - Shujun Guo
- School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, P. R. China.
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17
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Zhang L, Kang W, Xu D, Feng H, Zhang P, Li Z, Lu Y, Wu H. The rheological characteristics for the mixtures of cationic surfactant and anionic–nonionic surfactants: the role of ethylene oxide moieties. RSC Adv 2017. [DOI: 10.1039/c6ra28071d] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Ethylene oxide moieties in various numbers regulate the rheological characteristics of anionic–nonionic/cationic surfactants solutions by affecting the molecular self-assembly.
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Affiliation(s)
- Liming Zhang
- Institute of Enhanced Oil Recovery
- China University of Petroleum (Beijing)
- Beijing
- P.R. China
| | - Wanli Kang
- Institute of Enhanced Oil Recovery
- China University of Petroleum (Beijing)
- Beijing
- P.R. China
- School of Petroleum Engineering
| | - Derong Xu
- Institute of Enhanced Oil Recovery
- China University of Petroleum (Beijing)
- Beijing
- P.R. China
| | - Haishun Feng
- Institute of Enhanced Oil Recovery
- China University of Petroleum (Beijing)
- Beijing
- P.R. China
| | - Pengyi Zhang
- Institute of Enhanced Oil Recovery
- China University of Petroleum (Beijing)
- Beijing
- P.R. China
| | - Zhe Li
- Institute of Enhanced Oil Recovery
- China University of Petroleum (Beijing)
- Beijing
- P.R. China
| | - Yao Lu
- Institute of Enhanced Oil Recovery
- China University of Petroleum (Beijing)
- Beijing
- P.R. China
| | - Hairong Wu
- Institute of Enhanced Oil Recovery
- China University of Petroleum (Beijing)
- Beijing
- P.R. China
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18
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Wang P, Kang W, Yang H, Yin X, Zhao Y, Zhu Z, Zhang X. pH-Responsive wormlike micelles based on microstructural transition in a C22-tailed cationic surfactant–aromatic dibasic acid system. RSC Adv 2017. [DOI: 10.1039/c7ra07000d] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
pH-Responsive wormlike micelles based on microstructural transition have been developed by a C22-tailed cationic surfactant and aromatic dibasic acid.
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Affiliation(s)
- Pengxiang Wang
- School of Petroleum Engineering
- China University of Petroleum (East China)
- Qingdao 266580
- P. R. China
| | - Wanli Kang
- School of Petroleum Engineering
- China University of Petroleum (East China)
- Qingdao 266580
- P. R. China
| | - Hongbin Yang
- School of Petroleum Engineering
- China University of Petroleum (East China)
- Qingdao 266580
- P. R. China
| | - Xia Yin
- School of Petroleum Engineering
- China University of Petroleum (East China)
- Qingdao 266580
- P. R. China
| | - Yilu Zhao
- School of Petroleum Engineering
- China University of Petroleum (East China)
- Qingdao 266580
- P. R. China
| | - Zhou Zhu
- School of Petroleum Engineering
- China University of Petroleum (East China)
- Qingdao 266580
- P. R. China
| | - Xiangfeng Zhang
- School of Petroleum Engineering
- China University of Petroleum (East China)
- Qingdao 266580
- P. R. China
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19
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Georgieva GS, Anachkov SE, Lieberwirth I, Koynov K, Kralchevsky PA. Synergistic Growth of Giant Wormlike Micelles in Ternary Mixed Surfactant Solutions: Effect of Octanoic Acid. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:12885-12893. [PMID: 27934523 DOI: 10.1021/acs.langmuir.6b03955] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The synergistic growth of giant wormlike micelles in ternary mixed solutions composed of an anionic surfactant (sodium laurylethersulfate, SLES), a zwitterionic surfactant (cocamidopropyl betaine, CAPB), and octanoic acid (HC8) is studied. Rheological data and their analysis in terms of Cole-Cole plots and micellar characteristic times are presented, and the micellar structures behind the observed rheological behavior are revealed by cryo-TEM micrographs. The surfactant composition is fixed near the maximal micelle size of the binary SLES + CAPB system, whereas the concentration of HC8 is varied. At a given HC8 concentration, the viscosity of the ternary micellar solutions exhibits a very high and sharp peak. Polarized-light optical microscopy indicates that all investigated solutions are isotropic rather than liquid-crystalline. The cryo-TEM imaging shows complex phase behavior: wormlike micelles to the left of the peak, giant entangled wormlike micelles at the peak, and long wormlike micelles coexisting with multiconnected micellar aggregates to the right of the peak. The formation of multiconnected micelles leads to a drop in viscosity at the higher concentrations. The results contribute to a better understanding of the structure-rheology relations in micellar surfactant solutions and could be useful for controlling the properties of formulations in personal-care and house-hold detergency.
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Affiliation(s)
- Gergana S Georgieva
- Department of Chemical and Pharmaceutical Engineering, Faculty of Chemistry and Pharmacy, Sofia University , 1 James Bourchier Blvd., 1164 Sofia, Bulgaria
| | - Svetoslav E Anachkov
- Department of Chemical and Pharmaceutical Engineering, Faculty of Chemistry and Pharmacy, Sofia University , 1 James Bourchier Blvd., 1164 Sofia, Bulgaria
| | - Ingo Lieberwirth
- Max Planck Institute for Polymer Research , 10 Ackermannweg, 55128 Mainz, Germany
| | - Kaloian Koynov
- Max Planck Institute for Polymer Research , 10 Ackermannweg, 55128 Mainz, Germany
| | - Peter A Kralchevsky
- Department of Chemical and Pharmaceutical Engineering, Faculty of Chemistry and Pharmacy, Sofia University , 1 James Bourchier Blvd., 1164 Sofia, Bulgaria
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20
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Du M, Dai C, Chen A, Wu X, Li Y, Liu Y, Li W, Zhao M. Investigation on the aggregation behavior of photo-responsive system composed of 1-hexadecyl-3-methylimidazolium bromide and 2-methoxycinnamic acid. RSC Adv 2015. [DOI: 10.1039/c5ra08164e] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Mechanism of the aggregation behavior for the photo-responsive system composed of 1-hexadecyl-3-methylimidazolium bromide and 2-methoxycinnamic acid.
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Affiliation(s)
- Mingyong Du
- School of Petroleum Engineering
- China University of Petroleum (East China)
- Qingdao
- P. R. China
| | - Caili Dai
- School of Petroleum Engineering
- China University of Petroleum (East China)
- Qingdao
- P. R. China
| | - Ang Chen
- School of Petroleum Engineering
- China University of Petroleum (East China)
- Qingdao
- P. R. China
| | - Xuepeng Wu
- School of Petroleum Engineering
- China University of Petroleum (East China)
- Qingdao
- P. R. China
| | - Yuyang Li
- School of Petroleum Engineering
- China University of Petroleum (East China)
- Qingdao
- P. R. China
| | - Yifei Liu
- School of Petroleum Engineering
- China University of Petroleum (East China)
- Qingdao
- P. R. China
| | - Weitao Li
- School of Petroleum Engineering
- China University of Petroleum (East China)
- Qingdao
- P. R. China
| | - Mingwei Zhao
- School of Petroleum Engineering
- China University of Petroleum (East China)
- Qingdao
- P. R. China
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21
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Borkar N, Li B, Holm R, Håkansson AE, Müllertz A, Yang M, Mu H. Lipophilic prodrugs of apomorphine I: Preparation, characterisation, and in vitro enzymatic hydrolysis in biorelevant media. Eur J Pharm Biopharm 2015; 89:216-23. [DOI: 10.1016/j.ejpb.2014.12.014] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2014] [Revised: 12/04/2014] [Accepted: 12/08/2014] [Indexed: 12/21/2022]
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22
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Lu H, Shi Q, Huang Z. pH-Responsive Anionic Wormlike Micelle Based on Sodium Oleate Induced by NaCl. J Phys Chem B 2014; 118:12511-7. [DOI: 10.1021/jp506809m] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Hongsheng Lu
- School
of Chemistry and Chemical Engineering, Southwest Petroleum University, Xindu, Sichuan 610500, P. R. China
- Engineering Research Center of Oilfield Chemistry, Ministry of Education, Xindu, Sichuan 610500, P. R. China
| | - Qianping Shi
- School
of Chemistry and Chemical Engineering, Southwest Petroleum University, Xindu, Sichuan 610500, P. R. China
| | - Zhiyu Huang
- School
of Chemistry and Chemical Engineering, Southwest Petroleum University, Xindu, Sichuan 610500, P. R. China
- Engineering Research Center of Oilfield Chemistry, Ministry of Education, Xindu, Sichuan 610500, P. R. China
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23
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García-Pérez Á, da Silva MA, Eriksson J, González-Gaitano G, Valero M, Dreiss CA. Remarkable viscoelasticity in mixtures of cyclodextrins and nonionic surfactants. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:11552-11562. [PMID: 25201697 DOI: 10.1021/la503000z] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We report the effect of native cyclodextrins (α, β, and γ) and selected derivatives in modulating the self-assembly of the nonionic surfactant polyoxyethylene cholesteryl ether (ChEO10) and its mixtures with triethylene glycol monododecyl ether (C12EO3), which form wormlike micelles. Cyclodextrins (CDs) generally induce micellar breakup through a host-guest interaction with surfactants; instead, we show that a constructive effect, leading to gel formation, is obtained with specific CDs and that the widely invoked host-guest interaction may not be the only key to the association. When added to wormlike micelles of ChEO10 and C12EO3, native β-CD, 2-hydroxyethyl-β-CD (HEBCD), and a sulfated sodium salt of β-CD (SULFBCD) induce a substantial increase of the viscoelasticity, while methylated CDs rupture the micelles, leading to a loss of the viscosity, and the other CDs studied (native α- and γ- and hydroxypropylated CDs) show a weak interaction. Most remarkably, the addition of HEBCD or SULFBCD to pure ChEO10 solutions (which are low-viscosity, Newtonian fluids of small, ellipsoidal micelles) induces the formation of transparent gels. The combination of small-angle neutron scattering, dynamic light scattering, and cryo-TEM reveals that both CDs drive the elongation of ChEO10 aggregates into an entangled network of wormlike micelles. (1)H NMR and fluorescence spectroscopy demonstrate the formation of inclusion complexes between ChEO10 and methylated CDs, consistent with the demicellization observed. Instead, HEBCD forms a weak complex with ChEO10, while no complex is detected with SULFBCD. This shows that inclusion complex formation is not the determinant event leading to micellar growth. HEBCD:ChEO10 complex, which coexists with the aggregated surfactant, could act as a cosurfactant with a different headgroup area. For SULFBCD, intermolecular interactions via the external surface of the CD may be more relevant.
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Affiliation(s)
- Ángela García-Pérez
- Institute of Pharmaceutical Science, King's College London , Franklin-Wilkins Building, 150 Stamford Street, London SE1 9NH, UK
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24
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Shibaev AV, Tamm MV, Molchanov VS, Rogachev AV, Kuklin AI, Dormidontova EE, Philippova OE. How a viscoelastic solution of wormlike micelles transforms into a microemulsion upon absorption of hydrocarbon: new insight. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:3705-3714. [PMID: 24617576 DOI: 10.1021/la500484e] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
In this article, we investigate the effect of hydrocarbon addition on the rheological properties and structure of wormlike micellar solutions of potassium oleate. We show that a viscoelastic solution of entangled micellar chains is extremely responsive to hydrocarbons-the addition of only 0.5 wt % n-dodecane results in a drastic drop in viscosity by up to 5 orders of magnitude, which is due to the complete disruption of micelles and the formation of microemulsion droplets. We study the whole range of the transition of wormlike micelles into microemulsion droplets and discover that it can be divided into three regions: (i) in the first region, the solutions retain a high viscosity (∼10-350 Pa·s), the micelles are entangled but their length is reduced by the solubilization of hydrocarbons; (ii) in the second region, the system transitions to the unentangled regime and the viscosity sharply decreases as a result of further micelle shortening and the appearance of microemulsion droplets; (iii) in the third region, the viscosity is low (∼0.001 Pa·s) and only microemulsion droplets remain in the solution. The experimental studies were accompanied by theoretical considerations, which allowed us to reveal for the first time that (i) one of the leading mechanisms of micelle shortening is the preferential accumulation of the solubilized hydrocarbon in the spherical end caps of wormlike micelles, which makes the end caps thermodynamically more favorable; (ii) the onset of the sharp drop in viscosity is correlated with the crossover from the entangled to unentangled regime of the wormlike micellar solution taking place upon the shortening of micellar chains; and (iii) in the unentangled regime short cylindrical micelles coexist with microemulsion droplets.
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Affiliation(s)
- Andrey V Shibaev
- Physics Department, Moscow State University , 119991 Moscow, Russia
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25
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Zhang Y, Zhou D, Feng Y. In-Situ Formation of Viscoelastic Wormlike Micelles in Mixtures of Non-Surface-Active Compounds. J SURFACTANTS DETERG 2014. [DOI: 10.1007/s11743-014-1586-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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26
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Yan H, Long Y, Song K, Tung CH, Zheng L. Photo-induced transformation from wormlike to spherical micelles based on pyrrolidinium ionic liquids. SOFT MATTER 2014; 10:115-121. [PMID: 24651992 DOI: 10.1039/c3sm52346b] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
A UV-induced self-assembly based on N-methyl-N-cetylpyrrolidinium bromide (C16MPBr) and sodium (4-phenylazo-phenoxy)-acetate (AzoNa) was fabricated in the present work through facile mixing of C16MPBr and trans-AzoNa in water. Due to the trans-cis photoisomerization functionality of the AzoNa, this self-assembly possesses photo-responsive properties. Under ambient conditions, the morphology of the self-assembly was wormlike micelles with a high viscosity of about 10 Pa s, whereas after applying UV light, the self-assembly transformed into spherical micelles with a dramatically lowered viscosity of about 0.01 Pa s. Different from most reported photo-responsive wormlike micelles consisting of conventional cationic surfactant CTAB, our system was constructed from a novel pyrrolidinium ionic liquid. We hope this study may provide a deeper understanding of photo-responsive wormlike micelles constructed by cationic surfactants and photo-sensitive additives in water.
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Affiliation(s)
- Han Yan
- Key Laboratory of Colloid and Interface Chemistry, Shandong University, Ministry of Education, Jinan, Shandong 250100, P.R. China.
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27
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Single-component wormlike micellar system formed by a carboxylbetaine surfactant with C22 saturated tail. Colloids Surf A Physicochem Eng Asp 2013. [DOI: 10.1016/j.colsurfa.2013.06.016] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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28
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da Silva MA, Weinzaepfel E, Afifi H, Eriksson J, Grillo I, Valero M, Dreiss CA. Tuning the viscoelasticity of nonionic wormlike micelles with β-cyclodextrin derivatives: a highly discriminative process. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:7697-7708. [PMID: 23682968 DOI: 10.1021/la4015338] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We report the influence of five β-cyclodextrin (β-CD) derivatives, namely: randomly methylated β-cyclodextrin (MBCD), heptakis (2,6-di-O-methyl)-β-cyclodextrin (DIMEB), heptakis (2,3,6-tri-O-methyl)-β-cyclodextrin (TRIMEB), 2-hydroxyethyl-β-cyclodextrin (HEBCD) and 2-hydroxypropyl-β-cyclodextrin (HPBCD), on the self-assembly of mixtures of nonionic surfactants: polyoxyethylene cholesteryl ether (ChEO10) and monocaprylin (MCL). Mixtures of ChEO10/MCL in water form highly viscoelastic wormlike micelle solutions (WLM) over a range of concentrations; herein, the composition was fixed at 10 wt % ChEO10/3 wt % MCL. The addition of methylated β-CDs (MBCD, DIMEB, TRIMEB) induced a substantial disruption of the solid-like viscoelastic behavior, as shown from a loss of the Maxwell behavior, a large reduction in G' and G″ in oscillatory frequency-sweep measurements, and a drop of the viscosity. The disruption increased with the degree of substitution, following: MBCD < DIMEB < TRIMEB. Cryo-TEM images confirmed a loss of the WLM networks, revealing short rods and disc-like aggregates, which were corroborated by small-angle neutron scattering (SANS) measurements. Critical aggregation concentrations (CAC), measured by fluorescence spectroscopy, increased in the presence of DIMEB for both ChEO10 and MCL, suggesting the existence of interactions between methylated β-CDs and both surfactants involved in WLM formation. Instead, hydroxyl-β-CDs had a very different effect on the WLM. HPBCD only slightly reduced the solid-like behavior, without suppressing it. Quite remarkably, the addition of HEBCD reinforced the solid-like characteristics and increased the viscosity 10-fold. Cryo-TEM images confirmed the subsistence of WLM in ChEO10/MCL/HEBCD solutions, while SANS data revealed a slight elongation and thickening of the worms, and an increase of associated water molecules. CAC data showed that HPBCD had little effect on either surfactant, while HEBCD strongly affected the CAC of MCL and only slightly affected the ChEO10. For both DIMEB and HEBCD, time-resolved SANS measurements showed that morphology changes underlying these macroscopic changes occur in less than 100 ms.
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Affiliation(s)
- Marcelo A da Silva
- Institute of Pharmaceutical Science, King's College London, Franklin-Wilkins Building, 150 Stamford Street, London SE1 9NH, United Kingdom
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Abstract
A major scientific challenge of the past decade pertaining to the field of soft matter has been to craft 'adaptable' materials, inspired by nature, which can dynamically alter their structure and functionality on demand, in response to triggers produced by environmental changes. Amongst these, 'smart' surfactant wormlike micelles, responsive to external stimuli, are a particularly recent area of development, yet highly promising, given the versatility of the materials but simplicity of the design-relying on small amphiphilic molecules and their spontaneous self-assembly. The switching 'on' and 'off' of the micellar assembly structures has been reported using electrical, optical, thermal or pH triggers and is now envisaged for multiple stimuli. The structural changes, in turn, can induce major variations in the macroscopic characteristics, affecting properties such as viscosity and elasticity and sometimes even leading to a spontaneous and effective 'sol-gel' transition. These original smart materials based on wormlike micelles have been successfully used in the oil industry, and offer a significant potential in a wide range of other technological applications, including biomedicine, cleaning processes, drag reduction, template synthesis, to name but a few. This review will report results in this field published over the last few years, describe the potential and practical applications of stimuli-responsive wormlike micelles and point out future challenges.
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Affiliation(s)
- Zonglin Chu
- Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, PR China
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30
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Zhang Y, Han Y, Chu Z, He S, Zhang J, Feng Y. Thermally induced structural transitions from fluids to hydrogels with pH-switchable anionic wormlike micelles. J Colloid Interface Sci 2013; 394:319-28. [DOI: 10.1016/j.jcis.2012.11.032] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2012] [Revised: 11/11/2012] [Accepted: 11/15/2012] [Indexed: 10/27/2022]
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32
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WITHDRAWN: Cryo-TEM of molecular assemblies. Curr Opin Colloid Interface Sci 2012. [DOI: 10.1016/j.cocis.2012.10.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Ren S, Mu H, Alchaer F, Chtatou A, Müllertz A. Optimization of self nanoemulsifying drug delivery system for poorly water-soluble drug using response surface methodology. Drug Dev Ind Pharm 2012; 39:799-806. [DOI: 10.3109/03639045.2012.710634] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Afifi H, Karlsson G, Heenan RK, Dreiss CA. Structural transitions in cholesterol-based wormlike micelles induced by encapsulating alkyl ester oils with varying architecture. J Colloid Interface Sci 2012; 378:125-34. [DOI: 10.1016/j.jcis.2012.04.014] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2012] [Revised: 04/04/2012] [Accepted: 04/05/2012] [Indexed: 10/28/2022]
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Yoshimura T, Kusano T, Iwase H, Shibayama M, Ogawa T, Kurata H. Star-shaped trimeric quaternary ammonium bromide surfactants: adsorption and aggregation properties. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:9322-9331. [PMID: 22642550 DOI: 10.1021/la301220y] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Novel star-shaped trimeric surfactants consisting of three quaternary ammonium surfactants linked to a tris(2-aminoethyl)amine core were synthesized. Each ammonium had two methyls and a straight alkyl chain of 8, 10, 12, or 14 carbons. The adsorption and aggregation properties of these tris(N-alkyl-N,N-dimethyl-2-ammoniumethyl)amine bromides (3C(n)trisQ, in which n represents alkyl chain carbon number) were characterized by equilibrium and dynamic surface tension, rheology, small-angle neutron scattering (SANS), and cryogenic transmission electron microscopy (cryo-TEM) techniques. 3C(n)trisQ showed critical micelle concentrations (CMC) 1 order of magnitude lower than that of the corresponding gemini surfactants with an ethylene spacer and the corresponding monomeric surfactants. The logarithm of the CMC decreased linearly with increasing hydrocarbon chain length for 3C(n)trisQ. The slope of the line, which is well-known as Klevens equation, was larger than those of the monomeric and gemini surfactants; however, considering the total carbon number in the chains, the slope was shallower than the monomeric and was close to the gemini. Through the results such as surface tensions at the CMC (32-34 mN m(-1)) and the parameters of standard free energy, CMC/C(20) and pC(20), it was found that 3C(n)trisQ could adsorb densely at the air/water interface despite the strong electrostatic repulsion between multiple quaternary ammonium headgroups. Moreover, dynamic surface tension measurements showed that the kinetics of adsorption for 3C(n)trisQ to the air/water interface was slow because of their bulky structures. Furthermore, the results of rheology, SANS, and cryo-TEM determined that 3C(n)trisQ with n = 10 and 12 formed ellipsoidal micelles at low concentrations in solution and the structures transformed to threadlike micelles with very few branches for n = 12 as the concentration increased, but for n = 14 threadlike micelles formed at relatively low concentrations.
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Affiliation(s)
- Tomokazu Yoshimura
- Research Group of Chemistry, Division of Natural Sciences, Nara Women's University, Kitauoyanishi-machi, Nara 630-8506, Japan.
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