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Kelkar PU, Kaboolian M, Corder RD, Caggioni M, Lindberg S, Erk KA. Effects of shear-induced crystallization on the complex viscosity of lamellar-structured concentrated surfactant solutions. SOFT MATTER 2024; 20:3299-3312. [PMID: 38529796 DOI: 10.1039/d3sm01198d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/27/2024]
Abstract
Material relationships at low temperatures were determined for concentrated surfactant solutions using a combination of rheological experiments, cross-polarized microscopy, calorimetry, and small angle X-ray scattering. A lamellar structured 70 wt% solution of sodium laureth sulfate in water was used as a model system. At cold temperatures (5 °C and 10 °C), the formation of surfactant crystals resulted in extremely high viscosity. The bulk flow behavior of multi-lamellar vesicles (20 °C) and focal conic defects (90 °C) in the lamellar phase was similar. Shear-induced crystallization at temperatures higher than the equilibrium crystallization temperature range resulted in an unusual complex viscosity peak. The effects of processing-relevant parameters including temperature, cooling time, and applied shear were investigated. Knowledge of key low-temperature structure-property-processing relationships for concentrated feedstocks is essential for the sustainable design and manufacturing of surfactant-based consumer products for applications such as cold-water laundry.
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Affiliation(s)
- Parth U Kelkar
- School of Materials Engineering, Purdue University, West Lafayette, IN, 47907, USA.
| | - Matthew Kaboolian
- School of Materials Engineering, Purdue University, West Lafayette, IN, 47907, USA.
| | - Ria D Corder
- School of Materials Engineering, Purdue University, West Lafayette, IN, 47907, USA.
- School of Mechanical Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Marco Caggioni
- Corporate Engineering, The Procter & Gamble Company, West Chester, OH, 45069, USA
| | - Seth Lindberg
- Corporate Engineering, The Procter & Gamble Company, West Chester, OH, 45069, USA
| | - Kendra A Erk
- School of Materials Engineering, Purdue University, West Lafayette, IN, 47907, USA.
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2
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Yamamoto T, Nagae Y, Wakabayashi T, Kamiyama T, Suzuki H. Calorimetry of phase transitions in liquid crystal 8CB under shear flow. SOFT MATTER 2023; 19:1492-1498. [PMID: 36734340 DOI: 10.1039/d2sm01652d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
A differential scanning calorimeter equipped with a shearing system (shear rate of < 400 s-1) was developed to elucidate the thermodynamic properties of liquid crystalline phase transitions under shear flow. An analytical method was proposed to accurately estimate the heat flow caused by shear friction to evaluate the transition entropies. The phase transitions of 4'-n-octyl-4-cyano-biphenyl (8CB) under shear flow were investigated using the developed calorimeter. Although several shear-induced transitions for 8CB have been reported in the past using viscosity and small-angle X-ray scattering (SAXS) measurements, only the nematic-isotropic (N-I) and smectic-A-nematic (SA-N) transitions were detected as heat flow peaks. The N-I transition temperature was almost independent of the shear rate. The SA-N transition temperature was also independent of the shear rate, but the transition peak was broadened by applying shear flow. For both transitions, the transition entropies were independent of the shear rate. These results suggest that the thermodynamic properties were not considerably changed by shearing because the molecular alignments in the domains were not substantially changed, whereas shearing changed the LC domain directions, which can be detected by viscosity and SAXS measurements.
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Affiliation(s)
- Taro Yamamoto
- Department of Chemistry, Kindai University, Higashiosaka, Osaka, 577-8502, Japan.
| | - Yuki Nagae
- Department of Chemistry, Kindai University, Higashiosaka, Osaka, 577-8502, Japan.
| | - Tomonari Wakabayashi
- Department of Chemistry, Kindai University, Higashiosaka, Osaka, 577-8502, Japan.
| | - Tadashi Kamiyama
- Department of Chemistry, Kindai University, Higashiosaka, Osaka, 577-8502, Japan.
| | - Hal Suzuki
- Department of Chemistry, Kindai University, Higashiosaka, Osaka, 577-8502, Japan.
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Hatakeyama K, Yamagata Y, Takasaki Y, Miyamoto K, Takahashi T. Effects of temperature and shear conditions on lamellar-to-onion transition in nonionic surfactant/water systems. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.130755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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4
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Hussain M, Nagaraj M, Cayre OJ, Robles ESJ, Tantawy H, Bayly AE. Aqueous Phase Behavior of a NaLAS-Polycarboxylate Polymer System. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:5099-5108. [PMID: 33877849 DOI: 10.1021/acs.langmuir.0c03280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Linear alkylbenzene sulfonate (NaLAS) surfactant is often combined with polycarboxylate polymers in detergent formulations. However, the behavior of these aqueous surfactant-polymer systems in the absence of an added electrolyte is unreported. This work investigates the behavior of such systems using polarized light microscopy, small-angle X-ray scattering (SAXS), centrifugation, and 2H NMR techniques. A phase diagram at 50 °C is reported for 0-50 wt % NaLAS concentrations and 0-10 wt % polycarboxylate concentrations. The NaLAS-water system is micellar at concentrations <35 wt %, and a 2-phase micellar-lamellar system is seen at higher NaLAS levels, consistent with that reported by previous studies. As polymers are added at low surfactant concentrations (∼10 to 20 wt % NaLAS), a second optically isotropic phase is formed; this is thought to be a polymer-rich phase. Further addition of polycarboxylate leads to the formation of a lamellar phase. At high surfactant concentrations (>20 wt % NaLAS), the addition of a polymer induces a second lamellar phase. These observed behaviors are thought to arise as a result of depletion flocculation and salting-out effects. The observed lamellar phases adopt colloidal multilamellar vesicle (MLV) structures, and the average MLV radii were estimated using 2H NMR by probing the diffusion and anisotropy of D2O within the bilayers of the vesicles. The NMR results show that as the polymer concentration was increased from 0 to 10 wt %, an increase in the average multilamellar vesicle size from ∼200 to ∼500 nm was observed. This increase in the calculated average MLV radius likely results from depletion flocculation-induced MLV fusion.
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Affiliation(s)
- Mariam Hussain
- School of Chemical and Process Engineering, University of Leeds, Leeds LS2 9JT, United Kingdom
| | - Mamatha Nagaraj
- School of Physics and Astronomy, University of Leeds, Leeds LS2 9JT, United Kingdom
| | - Olivier J Cayre
- School of Chemical and Process Engineering, University of Leeds, Leeds LS2 9JT, United Kingdom
| | - Eric S J Robles
- The Procter and Gamble Company, Newcastle Innovation Centre, Newcastle-Upon-Tyne NE12 9TS, United Kingdom
| | - Hossam Tantawy
- The Procter and Gamble Company, Newcastle Innovation Centre, Newcastle-Upon-Tyne NE12 9TS, United Kingdom
| | - Andrew E Bayly
- School of Chemical and Process Engineering, University of Leeds, Leeds LS2 9JT, United Kingdom
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Kajiyama S, Iwase H, Nakayama M, Ichikawa R, Yamaguchi D, Seto H, Kato T. Shear-induced liquid-crystalline phase transition behaviour of colloidal solutions of hydroxyapatite nanorod composites. NANOSCALE 2020; 12:11468-11479. [PMID: 32227008 DOI: 10.1039/c9nr10996j] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Liquid-crystalline (LC) bio-inspired materials based on colloidal nanoparticles with anisotropic morphologies such as sheets, plates, rods and fibers were used as functional materials. They show stimuli-responsive behaviour under mechanical force and in electric and magnetic fields. Understanding the effects of external stimuli on the structures of anisotropic colloidal particles is important for the development of highly ordered structures. Recently, we have developed stimuli-responsive hydroxyapatite (HAP)-based colloidal LC nanorods that are environmentally-friendly functional materials. In the present study, the ordering behaviour of HAP nanorod dispersions, which show LC states, has been examined using in situ small-angle neutron scattering and rheological measurements (Rheo-SANS) under shearing force. The structural analyses and dynamic viscosity observations provided detailed information about the effects of shear force on the structural changes of HAP nanorods in D2O dispersion. The present Rheo-SANS measurements unraveled three kinds of main effects of the shear force: the enhancement of interactions between the HAP nanorods, the alignment of HAP nanorods to the shear flow direction, and the formation and disruption of HAP nanorod assemblies. Simultaneous analyses of dynamic viscosity and structural changes revealed that the HAP nanorod dispersions exhibited distinctive rheological properties accompanied by their ordered structural changes.
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Affiliation(s)
- Satoshi Kajiyama
- Department of Chemistry and Biotechnology, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
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6
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Galvosas P, Brox TI, Kuczera S. Rheo-NMR in food science-Recent opportunities. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2019; 57:757-765. [PMID: 30854731 DOI: 10.1002/mrc.4861] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Revised: 03/03/2019] [Accepted: 03/03/2019] [Indexed: 06/09/2023]
Abstract
For over 25 years, nuclear magnetic resonance (NMR) and magnetic resonance imaging (MRI) techniques have been used to study materials under mechanical deformation. Collectively, these methods are referred to as Rheo-NMR. In many cases, it provides spatially and temporally resolved maps of NMR spectra, intrinsic NMR parameters (such as relaxation times), or motion (such as diffusion or flow). Therefore, Rheo-NMR is complementary to conventional rheological measurements. This review will briefly summarize current capabilities and limitations of Rheo-NMR in the context of material science and food science in particular. It will report on recent advances such as the incorporation of torque sensors or the implementation of large amplitude oscillatory shear and point out future opportunities for Rheo-NMR in food science.
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Affiliation(s)
- Petrik Galvosas
- SCPS, Victoria University of Wellington, Wellington, New Zealand
- MacDiarmid Institute for Advanced Materials and Nanotechnology, New Zealand
| | - Timothy I Brox
- SCPS, Victoria University of Wellington, Wellington, New Zealand
| | - Stefan Kuczera
- SCPS, Victoria University of Wellington, Wellington, New Zealand
- Institute of Clinical Sciences, Sahlgrenska Academy, Gothenburg University, Gothenburg, Sweden
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7
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Structure and rheology of liquid crystal hydroglass formed in aqueous nanocrystalline cellulose suspensions. J Colloid Interface Sci 2019; 555:702-713. [PMID: 31416025 DOI: 10.1016/j.jcis.2019.08.022] [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: 06/04/2019] [Revised: 08/06/2019] [Accepted: 08/07/2019] [Indexed: 01/12/2023]
Abstract
HYPOTHESIS Liquid crystal hydroglass (LCH) is a biphasic soft material with flow programmable anisotropy that forms via phase separation in suspensions of charged colloidal rods upon increases in ionic strength. The unique structure and rheology of the LCH gel formed using nanocrystalline cellulose (NCC) is hypothesised to be dependent on colloidal stability that is modulated using specific ion effects arising from Hofmeister phenomena. EXPERIMENTS LCHs are prepared in NCC suspensions in aqueous media containing varying levels of sodium chloride (NaCl) or sodium thiocyanate (NaSCN). The NCC suspensions are characterised using rheology and structural analysis techniques that includes polarised optical microscopy, zeta potential, dynamic light scattering and small-angle X-ray scattering. FINDINGS The two salts have a profound effect on the formation process and structure of the LCH. Differences in network density and size of the liquid crystal domains are observed within the LCH for each of the salts, which is associated with the strength of interaction between NCC particles during LCH formation. In comparison to Cl- at the same salinity, the chaotropic nature of the weakly hydrated SCN- enhances colloidal stability by rendering NCC particles more hydrated and repulsive, but this also leads to weaker gel strength of the LCH. The results suggest that salts are a means in which to control the formation, structure and rheology of these anisotropic soft materials.
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8
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Großkopf S, Tiersch B, Koetz J, Mix A, Hellweg T. Shear-Induced Transformation of Polymer-Rich Lamellar Phases to Micron-Sized Vesicles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:3048-3057. [PMID: 30702293 DOI: 10.1021/acs.langmuir.8b02786] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
In the present work, we study the shear-induced transformation of polymer-rich lamellar phases into vesicles. The evolution of vesicle size is studied by different scattering techniques, rheology, and microscopy methods. The lamellar phase found in the system D2O/ o-xylene/ Pluronic PE9400/C8TAB can be fully transformed to multilamellar vesicles (MLVs) by applying shear. The size of the MLVs is proportional to the inverse square root of the shear rate. Hence, the polymer-based quaternary system behaves similar to lamellar phases based on small surfactant molecules. Additionally, we found a growth effect leading to a size increase of the vesicles after shearing was stopped.
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Affiliation(s)
| | - Brigitte Tiersch
- Colloid Chemistry, Department of Chemistry , Potsdam University , Karl-Liebknecht-Straße 24-25 , Golm, 14469 Potsdam , Germany
| | - Joachim Koetz
- Colloid Chemistry, Department of Chemistry , Potsdam University , Karl-Liebknecht-Straße 24-25 , Golm, 14469 Potsdam , Germany
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9
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Kuczera S, Gentile L, Brox TI, Olsson U, Schmidt C, Galvosas P. Multilamellar Vesicle Formation Probed by Rheo-NMR and Rheo-SALS under Large Amplitude Oscillatory Shear. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:8314-8325. [PMID: 29924625 DOI: 10.1021/acs.langmuir.8b01510] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The formation of multilamellar vesicles (MLVs) in the lyotropic lamellar phase of the system triethylene glycol mono n-decyl ether (C10E3)/water is investigated under large amplitude oscillatory shear (LAOS) using spatially resolved rheo-NMR spectroscopy and a combination of rheo-small angle light scattering (rheo-SALS) and conventional rheology. Recent advances in rheo-NMR hardware development facilitated the application of LAOS deformations in high-field NMR magnets. For the range of investigated strain amplitudes (10-50) and frequencies (1 and 2 rad s-1), MLV formation is observed in all NMR and most SALS experiments. It is found that the MLV size depends on the applied frequency in contrast to previous steady shear experiments where the shear rate is the controlling parameter. The onset of MLV formation, however, is found to vary with the shear amplitude. The LAOS measurements bear no indication of the intermediate structures resembling aligned multilamellar cylinders observed in steady shear experiments. Lissajous curves of stress vs strain reveal a transition from a viscoelastic solid material to a pseudoplastic material.
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Affiliation(s)
- Stefan Kuczera
- Victoria University of Wellington , SCPS, MacDiarmid Institute for Advanced Materials and Nanotechnology , Wellington 6140 , New Zealand
- Division of Physical Chemistry , Lund University , P.O. Box 124, 221 00 Lund , Sweden
| | - Luigi Gentile
- Division of Physical Chemistry , Lund University , P.O. Box 124, 221 00 Lund , Sweden
- Department of Biology, MEMEG unit , Lund University , Sölvegatan 35 , 223 62 Lund , Sweden
| | - Timothy I Brox
- Victoria University of Wellington , SCPS, MacDiarmid Institute for Advanced Materials and Nanotechnology , Wellington 6140 , New Zealand
| | - Ulf Olsson
- Division of Physical Chemistry , Lund University , P.O. Box 124, 221 00 Lund , Sweden
| | - Claudia Schmidt
- Department of Chemistry , Paderborn University , Warburger Strasse 100 , D-33098 Paderborn , Germany
| | - Petrik Galvosas
- Victoria University of Wellington , SCPS, MacDiarmid Institute for Advanced Materials and Nanotechnology , Wellington 6140 , New Zealand
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10
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Zhang L, Ma C, Sun J, Shao B, Portale G, Chen D, Liu K, Herrmann A. Genetically Engineered Supercharged Polypeptide Fluids: Fast and Persistent Self-Ordering Induced by Touch. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201803169] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Lei Zhang
- State Key Laboratory of Rare Earth Resource Utilization; Changchun Institute of Applied Chemistry; Chinese Academy of Sciences; 130022 Changchun China
- Zernike Institute for Advanced Materials; Nijenborgh 4 9747 AG Groningen The Netherlands
- Key Laboratory of Sensor Analysis of Tumor Marker; Ministry of Education; College of Chemistry and Molecular Engineering; Qingdao University of Science and Technology; 266042 Qingdao China
| | - Chao Ma
- Zernike Institute for Advanced Materials; Nijenborgh 4 9747 AG Groningen The Netherlands
| | - Jing Sun
- Zernike Institute for Advanced Materials; Nijenborgh 4 9747 AG Groningen The Netherlands
| | - Baiqi Shao
- State Key Laboratory of Rare Earth Resource Utilization; Changchun Institute of Applied Chemistry; Chinese Academy of Sciences; 130022 Changchun China
| | - Giuseppe Portale
- Zernike Institute for Advanced Materials; Nijenborgh 4 9747 AG Groningen The Netherlands
| | - Dong Chen
- Institute of Process Equipment; College of Energy Engineering; Zhejiang University; Hangzhou 310027 China
| | - Kai Liu
- State Key Laboratory of Rare Earth Resource Utilization; Changchun Institute of Applied Chemistry; Chinese Academy of Sciences; 130022 Changchun China
| | - Andreas Herrmann
- Zernike Institute for Advanced Materials; Nijenborgh 4 9747 AG Groningen The Netherlands
- Present address: DWI-Leibniz Institute for Interactive Materials; Forckenbeckstr. 50 52056 Aachen Germany
- Institute of Technical and Macromolecular Chemistry; RWTH Aachen University; Worringerweg 2 52074 Aachen Germany
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11
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Zhang L, Ma C, Sun J, Shao B, Portale G, Chen D, Liu K, Herrmann A. Genetically Engineered Supercharged Polypeptide Fluids: Fast and Persistent Self-Ordering Induced by Touch. Angew Chem Int Ed Engl 2018; 57:6878-6882. [DOI: 10.1002/anie.201803169] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Indexed: 11/10/2022]
Affiliation(s)
- Lei Zhang
- State Key Laboratory of Rare Earth Resource Utilization; Changchun Institute of Applied Chemistry; Chinese Academy of Sciences; 130022 Changchun China
- Zernike Institute for Advanced Materials; Nijenborgh 4 9747 AG Groningen The Netherlands
- Key Laboratory of Sensor Analysis of Tumor Marker; Ministry of Education; College of Chemistry and Molecular Engineering; Qingdao University of Science and Technology; 266042 Qingdao China
| | - Chao Ma
- Zernike Institute for Advanced Materials; Nijenborgh 4 9747 AG Groningen The Netherlands
| | - Jing Sun
- Zernike Institute for Advanced Materials; Nijenborgh 4 9747 AG Groningen The Netherlands
| | - Baiqi Shao
- State Key Laboratory of Rare Earth Resource Utilization; Changchun Institute of Applied Chemistry; Chinese Academy of Sciences; 130022 Changchun China
| | - Giuseppe Portale
- Zernike Institute for Advanced Materials; Nijenborgh 4 9747 AG Groningen The Netherlands
| | - Dong Chen
- Institute of Process Equipment; College of Energy Engineering; Zhejiang University; Hangzhou 310027 China
| | - Kai Liu
- State Key Laboratory of Rare Earth Resource Utilization; Changchun Institute of Applied Chemistry; Chinese Academy of Sciences; 130022 Changchun China
| | - Andreas Herrmann
- Zernike Institute for Advanced Materials; Nijenborgh 4 9747 AG Groningen The Netherlands
- Present address: DWI-Leibniz Institute for Interactive Materials; Forckenbeckstr. 50 52056 Aachen Germany
- Institute of Technical and Macromolecular Chemistry; RWTH Aachen University; Worringerweg 2 52074 Aachen Germany
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12
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Shen Y, Hoffmann H, Lin H, Liu Z, Hao J. The phase transition from L3 phase to vesicles and rheological properties of a nonionic surfactant mixture system. Colloid Polym Sci 2017. [DOI: 10.1007/s00396-017-4144-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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13
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Kawabata Y, Bradbury R, Kugizaki S, Weigandt K, Melnichenko YB, Sadakane K, Yamada NL, Endo H, Nagao M, Seto H. Effect of interlamellar interactions on shear induced multilamellar vesicle formation. J Chem Phys 2017; 147:034905. [PMID: 28734290 DOI: 10.1063/1.4994563] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Shear-induced multilamellar vesicle (MLV) formation has been studied by coupling the small-angle neutron scattering (SANS) technique with neutron spin echo (NSE) spectroscopy. A 10% mass fraction of the nonionic surfactant pentaethylene glycol dodecyl ether (C12E5) in water was selected as a model system for studying weak inter-lamellar interactions. These interactions are controlled either by adding an anionic surfactant, sodium dodecyl sulfate, or an antagonistic salt, rubidium tetraphenylborate. Increasing the charge density in the bilayer induces an enhanced ordering of the lamellar structure. The charge density dependence of the membrane bending modulus was determined by NSE and showed an increasing trend with charge. This behavior is well explained by a classical theoretical model. By considering the Caillé parameters calculated from the SANS data, the layer compressibility modulus B¯ is estimated and the nature of the dominant inter-lamellar interaction is determined. Shear flow induces MLV formation around a shear rate of 10 s-1, when a small amount of charge is included in the membrane. The flow-induced layer undulations are in-phase between neighboring layers when the inter-lamellar interaction is sufficiently strong. Under these conditions, MLV formation can occur without significantly changing the inter-lamellar spacing. On the other hand, in the case of weak inter-lamellar interactions, the flow-induced undulations are not in-phase, and greater steric repulsion leads to an increase in the inter-lamellar spacing with shear rate. In this case, MLV formation occurs as the amplitude of the undulations gets larger and the steric interaction leads to in-phase undulations between neighboring membranes.
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Affiliation(s)
- Y Kawabata
- Department of Chemistry, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan
| | - R Bradbury
- Center for Exploration of Energy and Matter, Department of Physics, Indiana University, Bloomington, Indiana 47408, USA
| | - S Kugizaki
- Department of Chemistry, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan
| | - K Weigandt
- NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-6102, USA
| | - Y B Melnichenko
- Biology and Soft Matter Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6393, USA
| | - K Sadakane
- Faculty of Life and Medical Sciences, Doshisha University, Kyotanabe, Kyoto 610-0321, Japan
| | - N L Yamada
- Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tokai 319-1106, Japan
| | - H Endo
- Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tokai 319-1106, Japan
| | - M Nagao
- Center for Exploration of Energy and Matter, Department of Physics, Indiana University, Bloomington, Indiana 47408, USA
| | - H Seto
- Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tokai 319-1106, Japan
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14
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Wang Y, Jiang L, Shen Q, Shen J, Han Y, Zhang H. Investigation on the self-assembled behaviors of C18unsaturated fatty acids in arginine aqueous solution. RSC Adv 2017. [DOI: 10.1039/c7ra06088b] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Self-assembled behaviors of UFAs in arginine solution have provided a theoretical basis for the application of two functional molecules in drug delivery.
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Affiliation(s)
- Yuxian Wang
- College of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing 211816
- China
| | - Ling Jiang
- College of Food Science and Light Industry
- Nanjing Tech University
- Nanjing 211816
- China
| | - Qinke Shen
- College of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing 211816
- China
| | - Jian Shen
- College of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing 211816
- China
| | - Yuwang Han
- College of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing 211816
- China
| | - Hongman Zhang
- College of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing 211816
- China
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15
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Topgaard D. Director orientations in lyotropic liquid crystals: diffusion MRI mapping of the Saupe order tensor. Phys Chem Chem Phys 2016; 18:8545-53. [PMID: 26948308 DOI: 10.1039/c5cp07251d] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The macroscopic physical properties of a liquid crystalline material depend on both the properties of the individual crystallites and the details of their spatial arrangement. We propose a diffusion MRI method to estimate the director orientations of a lyotropic liquid crystal as a spatially resolved field of Saupe order tensors. The method relies on varying the shape of the diffusion-encoding tensor to disentangle the effects of voxel-scale director orientational order and the local diffusion anisotropy of the solvent. Proof-of-concept experiments are performed on water in lamellar and reverse hexagonal liquid crystalline systems with intricate patterns of director orientations.
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Affiliation(s)
- Daniel Topgaard
- Division of Physical Chemistry, Department of Chemistry, Lund University, Lund, Sweden.
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16
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Wang L, Zhao W, Dong R, Hao J. Phase Structure Transition and Properties of Salt-Free Phosphoric Acid/Non-ionic Surfactants in Water. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:8366-8373. [PMID: 27490998 DOI: 10.1021/acs.langmuir.6b01596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Precise control of phase structure transition for the synthesis of multi-dimensional soft materials is a fascinating target in amphiphilic molecule self-assembly. Here, we demonstrate a spontaneous formation of a closely packed lamellar phase consisting of uni- and multi-lamellar vesicles through the incorporation of a small amount of an extractant, di(2-ethylhexyl)phosphoric acid (DEHPA), into the highly swollen, planar lamellar phase of a non-ionic tetraethylene glycol monododecyl ether (C12EO4) surfactant in water. It is figured out that the introduction of negative membrane charges results in the electrostatic repulsion among the lamellae, which suppresses the Helfrich undulation and induces a phase structure transition from planar lamellae to closely packed vesicles. Our results provide important insight into amphiphilic molecule self-assembly, where additives and pH can satisfy the opportunities for the precise tuning of the lamellar structures, which makes a way for the development of lamellar soft materials.
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Affiliation(s)
- Lihuan Wang
- Key Laboratory of Colloid and Interface Chemistry and Key Laboratory of Special Aggregated Materials, Ministry of Education, Shandong University , Jinan, Shandong 250100, People's Republic of China
| | - Wenrong Zhao
- Key Laboratory of Colloid and Interface Chemistry and Key Laboratory of Special Aggregated Materials, Ministry of Education, Shandong University , Jinan, Shandong 250100, People's Republic of China
| | - Renhao Dong
- Key Laboratory of Colloid and Interface Chemistry and Key Laboratory of Special Aggregated Materials, Ministry of Education, Shandong University , Jinan, Shandong 250100, People's Republic of China
| | - Jingcheng Hao
- Key Laboratory of Colloid and Interface Chemistry and Key Laboratory of Special Aggregated Materials, Ministry of Education, Shandong University , Jinan, Shandong 250100, People's Republic of China
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17
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Calero N, Santos J, Berjano M, Muñoz J. Shear-Induced Structural Transitions in a Model Fabric Softener Containing an Esterquat Surfactant. J SURFACTANTS DETERG 2016. [DOI: 10.1007/s11743-016-1808-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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18
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Patterson JP, Collins D, Michaud J, Axson JL, Sultana CM, Moser T, Dommer AC, Conner J, Grassian VH, Stokes MD, Deane GB, Evans JE, Burkart MD, Prather KA, Gianneschi N. Sea Spray Aerosol Structure and Composition Using Cryogenic Transmission Electron Microscopy. ACS CENTRAL SCIENCE 2016; 2:40-47. [PMID: 26878061 PMCID: PMC4731829 DOI: 10.1021/acscentsci.5b00344] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Indexed: 05/03/2023]
Abstract
The composition and surface properties of atmospheric aerosol particles largely control their impact on climate by affecting their ability to uptake water, react heterogeneously, and nucleate ice in clouds. However, in the vacuum of a conventional electron microscope, the native surface and internal structure often undergo physicochemical rearrangement resulting in surfaces that are quite different from their atmospheric configurations. Herein, we report the development of cryogenic transmission electron microscopy where laboratory generated sea spray aerosol particles are flash frozen in their native state with iterative and controlled thermal and/or pressure exposures and then probed by electron microscopy. This unique approach allows for the detection of not only mixed salts, but also soft materials including whole hydrated bacteria, diatoms, virus particles, marine vesicles, as well as gel networks within hydrated salt droplets-all of which will have distinct biological, chemical, and physical processes. We anticipate this method will open up a new avenue of analysis for aerosol particles, not only for ocean-derived aerosols, but for those produced from other sources where there is interest in the transfer of organic or biological species from the biosphere to the atmosphere.
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Affiliation(s)
- Joseph P. Patterson
- Department of Chemistry & Biochemistry and Scripps Institution
of Oceanography, University of California,
San Diego, La Jolla, California 92093, United States
- E-mail:
| | - Douglas
B. Collins
- Department of Chemistry & Biochemistry and Scripps Institution
of Oceanography, University of California,
San Diego, La Jolla, California 92093, United States
| | - Jennifer
M. Michaud
- Department of Chemistry & Biochemistry and Scripps Institution
of Oceanography, University of California,
San Diego, La Jolla, California 92093, United States
| | - Jessica L. Axson
- Department of Chemistry & Biochemistry and Scripps Institution
of Oceanography, University of California,
San Diego, La Jolla, California 92093, United States
| | - Camile M. Sultana
- Department of Chemistry & Biochemistry and Scripps Institution
of Oceanography, University of California,
San Diego, La Jolla, California 92093, United States
| | - Trevor Moser
- Environmental
Molecular Science Laboratory, Pacific Northwest National Laboratory, 3335 Innovation Boulevard, Richland, Washington 99354, United States
| | - Abigail C. Dommer
- Department of Chemistry & Biochemistry and Scripps Institution
of Oceanography, University of California,
San Diego, La Jolla, California 92093, United States
| | - Jack Conner
- Department of Chemistry & Biochemistry and Scripps Institution
of Oceanography, University of California,
San Diego, La Jolla, California 92093, United States
| | - Vicki H. Grassian
- Department
of Chemistry, University of Iowa, Iowa City, Iowa 52242, United States
| | - M. Dale Stokes
- Department of Chemistry & Biochemistry and Scripps Institution
of Oceanography, University of California,
San Diego, La Jolla, California 92093, United States
| | - Grant B. Deane
- Department of Chemistry & Biochemistry and Scripps Institution
of Oceanography, University of California,
San Diego, La Jolla, California 92093, United States
| | - James E. Evans
- Environmental
Molecular Science Laboratory, Pacific Northwest National Laboratory, 3335 Innovation Boulevard, Richland, Washington 99354, United States
| | - Michael D. Burkart
- Department of Chemistry & Biochemistry and Scripps Institution
of Oceanography, University of California,
San Diego, La Jolla, California 92093, United States
| | - Kimberly A. Prather
- Department of Chemistry & Biochemistry and Scripps Institution
of Oceanography, University of California,
San Diego, La Jolla, California 92093, United States
| | - Nathan
C. Gianneschi
- Department of Chemistry & Biochemistry and Scripps Institution
of Oceanography, University of California,
San Diego, La Jolla, California 92093, United States
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19
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Gentile L, Coppola L, Balog S, Mortensen K, Ranieri GA, Olsson U. Phase Coexistence in a Dynamic Phase Diagram. Chemphyschem 2015; 16:2459-65. [DOI: 10.1002/cphc.201500237] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2015] [Indexed: 11/07/2022]
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20
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Blum A, Kammeyer JK, Rush AM, Callmann CE, Hahn ME, Gianneschi NC. Stimuli-responsive nanomaterials for biomedical applications. J Am Chem Soc 2015; 137:2140-54. [PMID: 25474531 PMCID: PMC4353031 DOI: 10.1021/ja510147n] [Citation(s) in RCA: 330] [Impact Index Per Article: 36.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2014] [Indexed: 02/08/2023]
Abstract
Nature employs a variety of tactics to precisely time and execute the processes and mechanics of life, relying on sequential sense and response cascades to transduce signaling events over multiple length and time scales. Many of these tactics, such as the activation of a zymogen, involve the direct manipulation of a material by a stimulus. Similarly, effective therapeutics and diagnostics require the selective and efficient homing of material to specific tissues and biomolecular targets with appropriate temporal resolution. These systems must also avoid undesirable or toxic side effects and evade unwanted removal by endogenous clearing mechanisms. Nanoscale delivery vehicles have been developed to package materials with the hope of delivering them to select locations with rates of accumulation and clearance governed by an interplay between the carrier and its cargo. Many modern approaches to drug delivery have taken inspiration from natural activatable materials like zymogens, membrane proteins, and metabolites, whereby stimuli initiate transformations that are required for cargo release, prodrug activation, or selective transport. This Perspective describes key advances in the field of stimuli-responsive nanomaterials while highlighting some of the many challenges faced and opportunities for development. Major hurdles include the increasing need for powerful new tools and strategies for characterizing the dynamics, morphology, and behavior of advanced delivery systems in situ and the perennial problem of identifying truly specific and useful physical or molecular biomarkers that allow a material to autonomously distinguish diseased from normal tissue.
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Affiliation(s)
- Angela
P. Blum
- Department
of Chemistry & Biochemistry, University
of California, San Diego, La Jolla, California 92093, United States
| | - Jacquelin K. Kammeyer
- Department
of Chemistry & Biochemistry, University
of California, San Diego, La Jolla, California 92093, United States
| | - Anthony M. Rush
- Department
of Chemistry & Biochemistry, University
of California, San Diego, La Jolla, California 92093, United States
| | - Cassandra E. Callmann
- Department
of Chemistry & Biochemistry, University
of California, San Diego, La Jolla, California 92093, United States
| | - Michael E. Hahn
- Department
of Chemistry & Biochemistry, University
of California, San Diego, La Jolla, California 92093, United States
- Department
of Radiology, University of California,
San Diego, La Jolla, California 92093, United States
| | - Nathan C. Gianneschi
- Department
of Chemistry & Biochemistry, University
of California, San Diego, La Jolla, California 92093, United States
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21
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Lopez CG, Watanabe T, Martel A, Porcar L, Cabral JT. Microfluidic-SANS: flow processing of complex fluids. Sci Rep 2015; 5:7727. [PMID: 25578326 PMCID: PMC4289890 DOI: 10.1038/srep07727] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2014] [Accepted: 12/09/2014] [Indexed: 11/09/2022] Open
Abstract
Understanding and engineering the flow-response of complex and non-Newtonian fluids at a molecular level is a key challenge for their practical utilisation. Here we demonstrate the coupling of microfluidics with small angle neutron scattering (SANS). Microdevices with high neutron transmission (up to 98%), low scattering background (≲10⁻² cm⁻¹), broad solvent compatibility and high pressure tolerance (≈3-15 bar) are rapidly prototyped via frontal photo polymerisation. Scattering from single microchannels of widths down to 60 μm, with beam footprint of 500 μm diameter, was successfully obtained in the scattering vector range 0.01-0.3 Å(-1), corresponding to real space dimensions of ≃10-600 Å. We demonstrate our approach by investigating the molecular re-orientation and alignment underpinning the flow response of two model complex fluids, namely cetyl trimethylammonium chloride/pentanol/D₂O and sodium lauryl sulfate/octanol/brine lamellar systems. Finally, we assess the applicability and outlook of microfluidic-SANS for high-throughput and flow processing studies, with emphasis of soft matter.
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Affiliation(s)
- Carlos G Lopez
- Department of Chemical Engineering, Imperial College London, London SW7 2AZ, UK
| | - Takaichi Watanabe
- Department of Chemical Engineering, Imperial College London, London SW7 2AZ, UK
| | - Anne Martel
- Institute Laue-Langevin, BP 1566 rue Jules Horowitz, 380 42 Cedex 9 Grenoble, France
| | - Lionel Porcar
- Institute Laue-Langevin, BP 1566 rue Jules Horowitz, 380 42 Cedex 9 Grenoble, France
| | - João T Cabral
- Department of Chemical Engineering, Imperial College London, London SW7 2AZ, UK
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22
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Yao Y, Feng J, Han L, Che S. Hierarchal multi-lamellar silica vesicle clusters synthesized through self-assembly and mineralization. RSC Adv 2015. [DOI: 10.1039/c5ra19123h] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Novel hierarchal silica clusters composed of multi-lamellar silica vesicles were prepared through self-assembly and mineralization.
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Affiliation(s)
- Yuan Yao
- School of Chemistry and Chemical Technology
- State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- Shanghai 200240
- P.R. China
| | - Ji Feng
- School of Chemistry and Chemical Technology
- State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- Shanghai 200240
- P.R. China
| | - Lu Han
- School of Chemistry and Chemical Technology
- State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- Shanghai 200240
- P.R. China
| | - Shunai Che
- School of Chemistry and Chemical Technology
- State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- Shanghai 200240
- P.R. China
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23
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Zhu J, Tan M, Zhang L, Yin Q. Elongation flow-triggered morphology transitions of dendritic polyethylene amphiphilic assemblies: host-guest implications. SOFT MATTER 2014; 10:6506-6513. [PMID: 25046698 DOI: 10.1039/c4sm01012d] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The assemblies and transformations of dendritic polyethylene (DPE)-poly(oligo(ethyleneglycol) methacrylate) (POEGMA) amphiphilic micelles have been demonstrated by cryo-TEM and DLS techniques under elongation flow stimuli. The flow rate-dependence of the dissymmetry ratio suggests the possibility that a combination of shear and elongation could also be responsible for the transitions of DPE-POEGMAs, but it is obvious that the exposure of elongation flow is essential and plays a key role in the assembly and fusion of the DPE-POEGMA micelles. Fluorescence resonance energy transfer (FRET) is used to provide insight into the assembly and fusion of DPE-POEGMA under elongation flow. The FRET results show that a shorter separation distance of DiO-DiI with higher elongation rate can result in higher FRET efficiency. Furthermore, DPE-POEGMAs can display the responsive switching ability of the elongation flow-triggered FRET.
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Affiliation(s)
- Jieqing Zhu
- DSAPM Lab, PCFM Lab, OFCM Institute, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, China.
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24
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Gentile L, Behrens MA, Porcar L, Butler P, Wagner NJ, Olsson U. Multilamellar vesicle formation from a planar lamellar phase under shear flow. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:8316-25. [PMID: 24983325 DOI: 10.1021/la501071s] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
The formation of multilamellar vesicles (MLVs) from the lamellar phase of nonionic surfactant system C12E5/D2O under shear flow is studied by time-resolved small angle neutron and light scattering during shear flow. A novel small angle neutron scattering sample environment enables the tracking of the lamellae alignment in the velocity-velocity gradient (1-2) plane during MLV formation, which was tracked independently using flow small angle light scattering commensurate with rheology. During the lamellar-to-multilamellar vesicle transition, the primary Bragg peak from the lamellar ordering was observed to tilt, and this gradually increased with time, leading to an anisotropic pattern with a primary axis oriented at ∼25° relative to the flow direction. This distorted pattern persists under flow after MLV formation. A critical strain and critical capillary number based on the MLV viscosity are demonstrated for MLV formation, which is shown to be robust for other systems as well. These novel measurements provide fundamentally new information about the flow orientation of lamellae in the plane of flow that cannot be anticipated from the large body of previous literature showing nearly isotropic orientation in the 2,3 and 1,3 planes of flow. These observations are consistent with models for buckling-induced MLV formation but suggest that the instability is three-dimensional, thereby identifying the mechanism of MLV formation in simple shear flow.
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Affiliation(s)
- Luigi Gentile
- Department of Chemistry and Chemical Technologies, University of Calabria , Pietro Bucci 12C, 87036 Rende, Italy
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25
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Bernin D, Koch V, Nydén M, Topgaard D. Multi-scale characterization of lyotropic liquid crystals using 2H and diffusion MRI with spatial resolution in three dimensions. PLoS One 2014; 9:e98752. [PMID: 24905818 PMCID: PMC4048170 DOI: 10.1371/journal.pone.0098752] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2014] [Accepted: 05/07/2014] [Indexed: 11/19/2022] Open
Abstract
The ability of lyotropic liquid crystals to form intricate structures on a range of length scales can be utilized for the synthesis of structurally complex inorganic materials, as well as in devices for controlled drug delivery. Here we employ magnetic resonance imaging (MRI) for non-invasive characterization of nano-, micro-, and millimeter scale structures in liquid crystals. The structure is mirrored in the translational and rotational motion of the water, which we assess by measuring spatially resolved self-diffusion tensors and spectra. Our approach differs from previous works in that the MRI parameters are mapped with spatial resolution in all three dimensions, thus allowing for detailed studies of liquid crystals with complex millimeter-scale morphologies that are stable on the measurement time-scale of 10 hours. The data conveys information on the nanometer-scale structure of the liquid crystalline phase, while the combination of diffusion and data permits an estimate of the orientational distribution of micrometer-scale anisotropic domains. We study lamellar phases consisting of the nonionic surfactant C10E3 in O, and follow their structural equilibration after a temperature jump and the cessation of shear. Our experimental approach may be useful for detailed characterization of liquid crystalline materials with structures on multiple length scales, as well as for studying the mechanisms of phase transitions.
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Affiliation(s)
- Diana Bernin
- Applied Surface Chemistry, Chalmers University of Technology, Gothenburg, Sweden
- Swedish NMR Centre, University of Gothenburg, Gothenburg, Sweden
| | - Vanessa Koch
- Division of Physical Chemistry, Department of Chemistry, Lund University, Lund, Sweden
| | - Magnus Nydén
- Ian Wark Research Institute, University of South Australia, Adelaide, South Australia, Australia
| | - Daniel Topgaard
- Division of Physical Chemistry, Department of Chemistry, Lund University, Lund, Sweden
- * E-mail:
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26
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Song S, Wang H, Song A, Dong S, Hao J. Sponge Phase Producing Porous CeO2for Catalytic Oxidation of CO. Chemistry 2014; 20:9063-72. [DOI: 10.1002/chem.201304836] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2013] [Revised: 03/13/2014] [Indexed: 11/09/2022]
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27
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Shiba H, Noguchi H, Gompper G. Structure formation of surfactant membranes under shear flow. J Chem Phys 2014; 139:014702. [PMID: 23822315 DOI: 10.1063/1.4811239] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Shear-flow-induced structure formation in surfactant-water mixtures is investigated numerically using a meshless-membrane model in combination with a particle-based hydrodynamics simulation approach for the solvent. At low shear rates, uni-lamellar vesicles and planar lamellae structures are formed at small and large membrane volume fractions, respectively. At high shear rates, lamellar states exhibit an undulation instability, leading to rolled or cylindrical membrane shapes oriented in the flow direction. The spatial symmetry and structure factor of this rolled state agree with those of intermediate states during lamellar-to-onion transition measured by time-resolved scatting experiments. Structural evolution in time exhibits a moderate dependence on the initial condition.
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Affiliation(s)
- Hayato Shiba
- Institute for Solid State Physics, University of Tokyo, Chiba 277-8581, Japan.
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28
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Dou Y, Dong S, Hao J. Magnetic-field-induced orientational phase structure transition. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:1266-1271. [PMID: 24447257 DOI: 10.1021/la4047929] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Magnetic field effect on the phase transition at high temperature (from 50 °C) inside the magnetic field has been found in C14G2 (N-tetradecyllactobionamide)/C12EO4 (tetraethylene glycol monododecyl ether)/D2O system. The phase was transited quickly from lamellar phase to isotropic phases [bottom, micellar phase (L1 phase) and top, sponge phase (L3 phase)] induced by a magnetic field, which was demonstrated by (2)H NMR and FF-TEM measurements. The isotropic phases induced by magnetic field were not stable, and the upper L3 phase can recover to lamellar phase after being restored in a 55 °C thermostat outside the magnetic field for about one month. During the mechanism study, the C12EO4 molecule was proved to be the dominant component for the phase transition induced by the magnetic field, while the C14G2 molecule was the auxiliary and just affected the transition speed. The breaking and rebuilding of hydrogen bonds could play an important role in the phase transition and recovering. Moreover, the surfactant concentration had an effect on the speed of phase transiting and phase recovering. These observations could provide an understanding of the phase transition and also the applications for the controlled drug delivery system of bilayer membranes driving, induced by the magnetic field.
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Affiliation(s)
- Yingying Dou
- Key Laboratory of Colloid and Interface Chemistry and Key Laboratory of Special Aggregated Materials (Shandong University) , Ministry of Education, Jinan 250100, People's Republic of China
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29
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Dou Y, Long P, Dong S, Hao J. Spontaneous transformation of lamellar structures from simple to more complex states. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:12901-12908. [PMID: 24070426 DOI: 10.1021/la402993y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Spontaneous transformation of lamellar structures, such as multilamellar vesicles from micelles or unilamellar vesicles, is an important challenge in the field of amphiphile molecules, which may serve as models to understand biologically relevant bilayer membranes. Herein, we report a progressive self-assembly progress of N-tetradecyllactobionamide (C14G2) and tetraethylene glycol monododecyl ether (C12EO4) mixtures in aqueous solution. Increasing temperature or surfactant compositions causes spontaneous transformation from simple to high-level aggregates, i.e., from unilamellar vesicles, to coexisting multilamellar vesicles, terraced planar bilayers, and finally terraced planar bilayers. Deuterium nuclear magnetic resonance ((2)H NMR), freeze-fracture transmission electron microscopy (FF-TEM), and small-angle X-ray scattering (SAXS) measurements clearly demonstrate the spontaneously progressive self-assembly process. The interlamellar spacing (d) of the bilayers decreases from unilamellar vesicles to the terraced planar bilayers with an increase of the temperature or surfactant compositions. Lamellar samples consisting of terraced planar bilayers at higher temperature still show viscoelastic properties, being Bingham fluids, and both the viscoelasticity and yield stress increase with the composition and decrease with the temperature. The spontaneous transformation of the progressive self-assembly progress of C14G2 and C12EO4 aqueous mixtures is due to a balance of three driving forces, hydrophobic interactions, hydrogen bonding, and steric effects.
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Affiliation(s)
- Yingying Dou
- Key Laboratory of Colloid and Interface Chemistry and Key Laboratory of Special Aggregated Materials, Ministry of Education, Shandong University , Jinan, Shandong 250100, People's Republic of China
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30
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Xu W, Song A, Dong S, Chen J, Hao J. A systematic investigation and insight into the formation mechanism of bilayers of fatty acid/soap mixtures in aqueous solutions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:12380-12388. [PMID: 24028317 DOI: 10.1021/la403008d] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Vesicles are the most common form of bilayer structures in fatty acid/soap mixtures in aqueous solutions; however, a peculiar bilayer structure called a "planar sheet" was found for the first time in the mixtures. In the past few decades, considerable research has focused on the formation theory of bilayers in fatty acid/soap mixtures. The hydrogen bond theory has been widely accepted by scientists to explain the formation of bilayers. However, except for the hydrogen bond, no other driving forces were proposed systematically. In this work, three kinds of weak interactions were investigated in detail, which could perfectly demonstrate the formation mechanism of bilayer structures in the fatty acid/soap mixtures in aqueous solutions. (i) The influence of hydrophobic interaction was detected by changing the chain length of fatty acid (C(n)H(2n+1)COOH), in which n = 10 to 18, the phase behavior was investigated, and the phase region was presented. With the help of cryogenic transmission electron microscopy (cryo-TEM) observations, deuterium nuclear magnetic resonance ((2)H NMR), and X-ray diffraction (XRD) measurements, the vesicles and planar sheets were determined. The chain length of C(n)H(2n+1)COOH has an important effect on the physical state of the hydrophobic chain, resulting in an obvious difference in the viscoelasticity of the solution samples. (ii) The existence of hydrogen bonds between fatty acids and their soaps in aqueous solutions was demonstrated by Fourier transform infrared (FT-IR) spectroscopy and molecule dynamical simulation. From the pH measurements, the pH ranges of the bilayer formation were at the pKa values of fatty acids, respectively. (iii) Counterions can be embedded in the stern layer of the bilayers and screen the electrostatic repulsion between the COO(-) anionic headgroups. FT-IR characterization demonstrated a bidentate bridging coordination mode between counterions and carboxylates. The conductivity measurements provided the degree of counterion binding (β = 0.854), indicating the importance of the counterions.
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Affiliation(s)
- Wenlong Xu
- Key Laboratory of Colloid and Interface Chemistry and Key Laboratory of Special Aggregated Materials, Shandong University, Ministry of Education , Jinan 250100, P. R. China
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31
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Ramesh N, Sarangi NK, Patnaik A. Establishing the ellipsoidal geometry of a benzoic acid-based amphiphile via dimer switching: insights from intramolecular rotation and facial H-bond torsion. J Phys Chem B 2013; 117:5345-54. [PMID: 23534676 DOI: 10.1021/jp400854x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Soft molecular ellipsoids conceived from 3,4-di(dodecyloxy)benzoic acid (DDBA) amphiphile draw attention to monomer structure design, intramolecular -COOH headgroup twist (ϕ°) and cyclic-acyclic dimer switching through facial H-bond torsion (ψ°). Generically, precipitation in hydrogen bonded systems has been the prime phenomenon once the critical aggregation concentrations were reached in the bulk solution. DDBA was no exception to this generalization. It formed precipitates in chloroform and methanol with no specific geometry but with cyclic dimer motifs in them. On the contrary, surface pressure modulated interfacial aggregation with ellipsoidal geometry followed acyclic dimerization (catemer motif) with various levels of headgroup torsion, established through real-time polarization modulated infrared reflection-absorption spectroscopy (IRRAS) and density functional theory (DFT) calculations, that estimated the energy costs for these unexplored pathways. The reaction coordinates ϕ° and ψ° in consonance with 2D surface pressure modulation thus directed the shape anisotropy during the dynamic self-assembly of DDBA. Changes in subphase pH and metal ionic environment had a derogatory effect on the ellipsoid formation, the structural requirement for which strictly followed a stringent need for twin alkyl chains in an asymmetric unit cell, as 4-dodecyloxybenzoic acid (MABA) with a single alkyl chain formed exclusively spherical assemblies with no dimer modulation. The investigation thus reports unexplored energy pathways toward ellipsoidal geometry of the amphiphile in the course of its interfacial aggregation.
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Affiliation(s)
- Nivarthi Ramesh
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, India
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32
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Sato D, Obara K, Kawabata Y, Iwahashi M, Kato T. Re-entrant lamellar/onion transition with varying temperature under shear flow. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:121-132. [PMID: 23214993 DOI: 10.1021/la3041665] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We have found for the first time the reentrant lamellar/onion (lamellar-onion-lamellar) transition with varying temperature under constant shear rate by using simultaneous measurements of shear stress and small-angle X-ray scattering (Rheo-SAXS) for a nonionic surfactant (C(14)E(5))/water system, which exhibits the lamellar phase in a wide temperature range from 15-75 °C. The onion state exists in a closed region in the temperature-concentration diagram at a constant shear rate. Temperature dependence of the lamellar repeat distance (d) at rest has also been measured at several concentrations. It is shown that the increase of d with increasing temperature is necessary for the existence of the lower transition. We have investigated the change in the lamellar orientation in the lamellar-to-onion and onion-to-lamellar transition processes near the upper and lower transition temperatures. For all four kinds of transition processes, the following change in the lamellar orientation is observed; lamellar state (oriented to the velocity gradient direction) ↔ further enhancement of the orientation to the velocity gradient direction ↔ enhancement of the orientation to the neutral direction ↔ onion state.
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Affiliation(s)
- Daijiro Sato
- Department of Chemistry, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo 192-0397, Japan
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33
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Medronho B, Olsson U, Schmidt C, Galvosas P. Transient and Steady-State Shear Banding in a Lamellar Phase as Studied by Rheo-NMR. ACTA ACUST UNITED AC 2012. [DOI: 10.1524/zpch.2012.0313] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Abstract
Flow fields and shear-induced structures in the lamellar (L
α
) phase of the system triethylene glycol mono n-decyl ether (C10E3)/water were investigated by NMR velocimetry, diffusometry, and
2
H NMR spectroscopy. The transformation from multilamellar vesicles (MLVs) to aligned planar lamellae is accompanied by a transient gradient shear banding. A high-shear-rate band of aligned lamellae forms next to the moving inner wall of the cylindrical Couette shear cell while a low-shear-rate band of the initial MLV structure remains close to the outer stationary wall. The band of layers grows at the expense of the band of MLVs until the transformation is completed. This process scales with the applied strain. Wall slip is a characteristic of the MLV state, while aligned layers show no deviation from Newtonian flow. The homogeneous nature of the opposite transformation from well aligned layers to MLVs via an intermediate structure resembling undulated multilamellar cylinders is confirmed. The strain dependence of this transformation appears to be independent of temperature. The shear diagram, which represents the shear-induced structures as a function of temperature and shear rate, contains a transition region between stable layers and stable MLVs. The steady-state structures in the transition region show a continuous change from layer-like at high temperature to MLV-like at lower temperature. These structures are homogeneous on a length scale above a few micrometers.
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Affiliation(s)
- Bruno Medronho
- University of Algarve, Faculty of Sciences and Technology, Faro, Portugal
| | - Ulf Olsson
- Lund University, Physical Chemistry, Lund, Schweden
| | - Claudia Schmidt
- University of Paderborn, Faculty of Science, Paderborn, Deutschland
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34
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Gentile L, Oliviero Rossi C, Olsson U. Rheological and rheo-SALS investigation of the multi-lamellar vesicle formation in the C12E3/D2O system. J Colloid Interface Sci 2012; 367:537-9. [DOI: 10.1016/j.jcis.2011.10.057] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2011] [Revised: 10/21/2011] [Accepted: 10/22/2011] [Indexed: 10/15/2022]
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35
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Gentile L, Silva BFB, Balog S, Mortensen K, Olsson U. Structural transitions induced by shear flow and temperature variation in a nonionic surfactant/water system. J Colloid Interface Sci 2012; 372:32-9. [PMID: 22321990 DOI: 10.1016/j.jcis.2012.01.027] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2011] [Revised: 01/12/2012] [Accepted: 01/13/2012] [Indexed: 10/14/2022]
Abstract
In this study, we investigate structural transitions of tetraethylene glycol monohexadecyl ether (C(16)E(4)) in D(2)O as a function of shear flow and temperature. Via a combination of rheology, rheo-small-angle neutron scattering and rheo-small-angle light scattering, we probe the structural evolution of the system with respect to shear and temperature. Multi-lamellar vesicles, planar lamellae, and a sponge phase were found to compete as a function of shear rate and temperature, with the sponge phase involving the formation of a new transient lamellar phase with a larger spacing, coexisting with the preceding lamellar phase within a narrow temperature-time range. The shear flow behavior of C(16)E(4) is also found to deviate from other nonionic surfactants with shorter alkyl chains (C(10)E(3) and C(12)E(4)), resembling to the C(16)E(7) case, of longer chain.
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Affiliation(s)
- Luigi Gentile
- Department of Chemistry, University of Calabria, P. Bucci 14C, 87036 Rende, Italy.
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36
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Multi-lamellar vesicle formation in a long-chain nonionic surfactant: C16E4/D2O system. J Colloid Interface Sci 2011; 362:1-4. [DOI: 10.1016/j.jcis.2011.06.053] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2011] [Revised: 06/20/2011] [Accepted: 06/21/2011] [Indexed: 10/18/2022]
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37
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Ito M, Kosaka Y, Kawabata Y, Kato T. Transition processes from the lamellar to the onion state with increasing temperature under shear flow in a nonionic surfactant/water system studied by Rheo-SAXS. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:7400-7409. [PMID: 21574584 DOI: 10.1021/la104826s] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
In a previous paper, we reported for the first time the lamellar-to-onion transition with increasing temperature at around 67 °C under a constant shear rate (0.3-10 s(-1)) in a nonionic surfactant C(16)E(7)/water system. In this study, the first temperature-shear rate diagram has been constructed in a wider range of shear rate (0.05-30 s(-1)) than in our previous study based on the temperature dependence of the shear stress at constant shear rate. The results suggest that the critical temperature above which the transition begins does not depend on the shear rate very much, although it takes a very shallow minimum. Then we have performed simultaneous measurements of small-angle X-ray scattering/shear stress (rheo-SAXS) with a stepwise increase in temperature of 0.1 K per 15 min at a constant shear rate of 3 s(-1) near the transition temperature. When the temperature exceeds 67 °C, just before the increase in the shear stress, the intensity of the Bragg peak for the velocity gradient direction (approximately proportional to the number of lamellae with their normal along this direction) is suddenly increased. As the temperature increases by 0.2 K, the shear stress begins to increase. At the same time, the peak intensity in the velocity gradient direction rapidly decreases and instead the intensity in the neutral direction increases. As the temperature increases further, the intensities in both the neutral and gradient directions decrease whereas the intensity in the flow direction increases, corresponding to the formation of onions. We have also performed rheo-SAXS experiments with a stepwise increase in shear rate at 72 °C. The sequence of the change in the intensity in each direction is almost the same in the temperature scan experiments at constant shear rate, suggesting that the transition mechanisms along these two paths are similar. The abrupt enhancement of the lamellar orientation with the layer normal along the velocity gradient direction just before the transition is the first finding and strongly supports the coherent buckling mechanism in the lamellar-to-onion transition proposed by Zilman and Granek (Zilman, A. G.; Granek, R. Eur. Phys. J. B 1999, 11, 593).
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Affiliation(s)
- Makiko Ito
- Department of Chemistry, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo 192-0397, Japan
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38
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Youssry M, Coppola L, Nicotera I, Ar G, Schmidt C. Effect of shear on vesicle and lamellar phases of DDAB/lecithin ternary systems. J Colloid Interface Sci 2011; 358:506-12. [DOI: 10.1016/j.jcis.2011.03.053] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2011] [Revised: 03/13/2011] [Accepted: 03/17/2011] [Indexed: 10/18/2022]
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39
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Aslund I, Medronho B, Topgaard D, Söderman O, Schmidt C. Homogeneous length scale of shear-induced multilamellar vesicles studied by diffusion NMR. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2011; 209:291-299. [PMID: 21349752 DOI: 10.1016/j.jmr.2011.01.024] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2010] [Revised: 01/19/2011] [Accepted: 01/27/2011] [Indexed: 05/30/2023]
Abstract
A recently developed protocol for pulsed gradient spin echo (PGSE) NMR is applied for the size determination of multilamellar vesicles (MLVs). By monitoring the self-diffusion behavior of water, the technique yields an estimate of the homogeneous length scale λ(hom), i.e. the maximum length scale at which there is local structural heterogeneity in a globally homogeneous material. A cross-over between local non-Gaussian to global Gaussian diffusion is observed by varying the experimentally defined length- and time-scales. Occasional observation of a weak Bragg peak in the PGSE signal attenuation curves permits the direct estimation of the MLV radius in favorable cases, thus yielding the constant of proportionality between λ(hom) and radius. The microstructural origin of the Bragg peak is verified through Brownian dynamics simulations and a theoretical analysis based on the center-of-mass diffusion propagator. λ(hom) is decreasing with increasing shear rate in agreement with theoretical expectations and results from (2)H NMR lineshape analysis.
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Affiliation(s)
- Ingrid Aslund
- Physical Chemistry, Center of Chemistry and Chemical Engineering, Lund University, Lund, Sweden.
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40
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Gentile L, Rossi CO, Olsson U, Ranieri GA. Effect of shear rates on the MLV formation and MLV stability region in the C12E5/D2O system: rheology and rheo-NMR and rheo-SANS experiments. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:2088-2092. [PMID: 21261313 DOI: 10.1021/la1046047] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
At high temperatures, pentaethylene glycol monododecyl ether (C12E5) in D2O forms a swollen lamellar phase. This letter reports the shear-induced multilamellar vesicle (MLV) formation in a sample that contains 40 wt % C12E5 dissolved in D2O at 55 °C. This transition has been investigated by time-resolved rheo-nuclear magnetic resonance, rheo small-angle neutron scattering, and rheometry. The typical transient viscosity behavior of MLV formation has been discovered at 1 s(-1). For the first time, it has been found that MLVs are not stable over time when subjected to high shear rates. Our results show that the MLV stability is confined in a narrow region in the range 1-10 s(-1) shear rates. This is not observed for other CnEm surfactants.
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Affiliation(s)
- Luigi Gentile
- Department of Chemistry, University of Calabria , P. Bucci 14C, 87036 Rende, Italy
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41
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Liu C, Hao J. Shear-Induced Structural Transition and Recovery in the Salt-Free Catanionic Surfactant Systems Containing Deoxycholic Acid. J Phys Chem B 2011; 115:980-9. [DOI: 10.1021/jp107946n] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Changcheng Liu
- Key Laboratory of Colloid and Interface Chemistry, Shandong University, Ministry of Education, Jinan 240100, P. R. China
| | - Jingcheng Hao
- Key Laboratory of Colloid and Interface Chemistry, Shandong University, Ministry of Education, Jinan 240100, P. R. China
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42
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Thermodynamics and kinetics of vesicles formation processes. Adv Colloid Interface Sci 2010; 161:77-88. [PMID: 20079476 DOI: 10.1016/j.cis.2009.11.004] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2009] [Revised: 11/23/2009] [Accepted: 11/24/2009] [Indexed: 11/21/2022]
Abstract
Vesicles are hollow aggregates, composed of bilayers of amphiphilic molecules, dispersed into and filled with a liquid solvent. These aggregates can be formed either as equilibrium or as out of equilibrium meta-stable structures and they exhibit a rich variety of different morphologies. The surprising richness of structures, the vast range of industrial applications and the presence of vesicles in a number of biological systems have attracted the interest of numerous researchers and scientists. In this article, we review both the thermodynamics and the kinetics aspects of the phenomena of formation of vesicles. We start presenting the thermodynamics of bilayer membranes formation and deformation, with the aim of deriving the conditions for the existence of equilibrium vesicles. Specifically, we use the results from continuum thermodynamics to discuss the possibility of formation of stable equilibrium vesicles, from both mixed amphiphiles and single component systems. We also link the bilayer membrane properties to the molecular structure of the starting amphiphiles. In the second part of this article, we focus on the dynamics and kinetics of vesiculation. We review the process of vesicles formation both from planar lamellar phase under shear and from isotropic micelles. In order to clarify the physical mechanisms of vesicles formation, we continuously draw a parallel between emulsification and vesiculation processes. Specifically, we compare the experimental results, the driving forces and the relative scaling laws identified for the two processes. Describing the dynamics of vesicles formation, we also discuss why non equilibrium vesicles can be formed by kinetics control and why they are meta-stable. Understanding how to control the properties, the stability and the formation process of vesicles is of fundamental importance for a vast number of industrial applications.
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43
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Liu C, Hao J, Wu Z. Phase Behavior and Rheological Properties of Salt-Free Catanionic Surfactant Mixtures in the Presence of Bile Acids. J Phys Chem B 2010; 114:9795-804. [DOI: 10.1021/jp103916a] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Changcheng Liu
- Key Laboratory of Colloid and Interface Chemistry, Shandong University, Ministry of Education, Jinan 250100, and Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039, People’s Republic of China
| | - Jingcheng Hao
- Key Laboratory of Colloid and Interface Chemistry, Shandong University, Ministry of Education, Jinan 250100, and Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039, People’s Republic of China
| | - Ziyu Wu
- Key Laboratory of Colloid and Interface Chemistry, Shandong University, Ministry of Education, Jinan 250100, and Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039, People’s Republic of China
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44
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Medronho B, Rodrigues M, Miguel MG, Olsson U, Schmidt C. Shear-induced defect formation in a nonionic lamellar phase. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:11304-11313. [PMID: 20373778 DOI: 10.1021/la100627z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
(2)H NMR experiments on a nonionic oriented lamellar phase demonstrate that shear flow induces structural defects in the lamellar structure. These substantial structural changes give rise to a transition from a viscous to a solidlike behavior; the elastic modulus of presheared samples was found to increase, reversibly, with the applied preshear rate. A similar behavior was found when step-cycling the temperature toward the layer-to-multilamellar-vesicle transition and back at constant shear rate. However, while shear rate controls the defect density, the temperature is found to control the defect rigidity. The lamellar phase exhibits a shear-thinning behavior under steady shear conditions, following the power law eta approximately gamma(n), with n approximately -0.4. Both the shear thinning and the elastic behavior are in agreement with the available theoretical models. The observed shear-induced structural defects are reversible and can be regarded as a pretransition prior to the shear-induced formation of multilamellar vesicles.
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Affiliation(s)
- B Medronho
- Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal.
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45
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Dong R, Hao J. Complex Fluids of Poly(oxyethylene) Monoalkyl Ether Nonionic Surfactants. Chem Rev 2010; 110:4978-5022. [DOI: 10.1021/cr9003743] [Citation(s) in RCA: 174] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Renhao Dong
- Key Laboratory of Colloid and Interface Chemistry, Shandong University, Ministry of Education, Jinan 250100, PR China
| | - Jingcheng Hao
- Key Laboratory of Colloid and Interface Chemistry, Shandong University, Ministry of Education, Jinan 250100, PR China
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46
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Suganuma Y, Imai M, Kato T, Olsson U, Takahashi T. Order-disorder transition of nonionic onions under shear flow. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:7988-7995. [PMID: 20232830 DOI: 10.1021/la904862e] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We have investigated the shear-induced ordering of multilamellar vesicles (onions) in a nonionic surfactant (C(12)E(4)) system using a small-angle light scattering (shear-SALS) and a small-angle X-ray scattering (shear-SAXS) technique. In a narrow shear rate-temperature space, the onions form a two-dimensional (2D) hexagonally close-packed structure that shows characteristic hexagonal scattering patterns in both SALS and SAXS. In the dynamic phase diagram, the ordered onion phase is surrounded by disordered onion phase, indicating reentrant behavior against the temperature. The disorder-order transition is accompanied by a jump in onion size by a factor of 5-6. In the disordered onion phase, by applying a shear flow, the planar lamellar membranes transform to an intermediate structure, multilamellae cylinders or a coherent stripe buckling, and then the intermediate structure develops to the isotropic onions. On the other hand, in the ordered onion phase, the intermediate structure breaks to onions stretched in the shear velocity direction, and then the stretched onions aligned gradually to form the 2D hexagonal close packing.
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Affiliation(s)
- Yukiko Suganuma
- Department of Physics, Ochanomizu University, 2-1-1 Otsuka, Bunkyo, Tokyo 112-8610, Japan
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47
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Kosaka Y, Ito M, Kawabata Y, Kato T. Lamellar-to-onion transition with increasing temperature under shear flow in a nonionic surfactant/water system. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:3835-3842. [PMID: 20214389 DOI: 10.1021/la903251v] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Simultaneous measurements of small-angle light scattering/shear stress (Rheo-SALS) and small-angle X-ray scattering/shear stress (Rheo-SAXS) have been performed in the lamellar phase of the C(16)E(7)/D(2)O system. As the temperature is increased and exceeds 67 degrees C at constant shear rates (at 1 and 3 s(-1)), the shear stress increases abruptly and a four-lobe pattern is observed in the depolarized SALS. These results suggest that the lamellar-to-onion transition occurs with increasing temperature, which has not yet been reported. The diameter of onions obtained from the depolarized SALS pattern at 3 s(-1) increases with increasing temperature. The transition is reversible against the change in temperature. The Rheo-SALS measurements have also been made with a stepwise increase in shear rate at constant temperature. The results are consistent with the above temperature-scan experiments at constant shear rate, suggesting that the transition does not depend on the path. The variation of the SAXS pattern at 3 s(-1) indicates that the orientation of lamellae becomes isotropic as the temperature is increased from 67 to 69 degrees C, which also supports the lamellar-to-onion transition. The transition temperature at constant shear rate (at 3 s(-1)) increases rapidly with a slight increase in surfactant concentration. From this, together with the SAXS results at rest in our previous study, we deduce that an increase in the water-layer thickness is necessary for the lamellar-to-onion transition with increasing temperature.
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Affiliation(s)
- Yuriko Kosaka
- Department of Chemistry, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo 192-0397, Japan
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48
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Medronho B, Schmidt C, Olsson U, Miguel MG. Size determination of shear-induced multilamellar vesicles by rheo-NMR spectroscopy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:1477-1481. [PMID: 20099913 DOI: 10.1021/la903682p] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
A model for analyzing the deuterium ((2)H) NMR line shapes of D(2)O in surfactant multilamellar vesicle (MLV, "onion") systems is proposed. The assumption of the slow exchange of water molecules between adjacent layers implies that the (2)H NMR line shape is simply given by a sum of Lorentzians if the condition of motional narrowing is also fulfilled. Using the classical two-step model for the NMR relaxation in structured fluids allows us to calculate how the NMR line shape depends on the MLV size. The model is tested on two different MLV systems for which the NMR line shapes are measured as a function of the applied shear rate using rheo-NMR. The MLV sizes obtained are in good agreement with previous data from rheo-small-angle light scattering.
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Affiliation(s)
- B Medronho
- Department of Chemistry, University of Coimbra, 3004-535, Coimbra, Portugal.
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49
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Yuan Z, Dong S, Liu W, Hao J. Transition from vesicle phase to lamellar phase in salt-free catanionic surfactant solution. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:8974-8981. [PMID: 19719214 DOI: 10.1021/la900662w] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
A salt-free cationic and anionic (catanionic) surfactant system was formed by mixing a double-tailed di-(2-ethylhexyl) phosphoric acid (DEHPA, commercial name P204), which is an excellent extractant of rare earth metal ions, with a single-tailed cationic trimethyltetradecylammonium hydroxide (TTAOH) in water. With the mole ratio (r) of DEHPA to TTAOH varying from 0.9 to 1, the phase transition occurred from a densely stacked vesicle phase (Lalphav) to a lamellar phase (Lalphal). Macroscopic properties, such as polarization and rheology, were measured and changed greatly during the course of the phase transition. When r was 0.96 or 0.98, the steady state shear curves exhibited two yield stress values, indicating the coexistence of the Lalphav phase and the Lalphal phase. The Lalphal phase formed in the salt-free and zero-charged system (r=1.0) is defective and undulating, which was confirmed by cryogenic transmission electron microscopy (cryo-TEM). The deuterium nuclear magnetic resonance spectra (2H NMR) showed that a single peak (singlet) split into two symmetric peaks (doublet) gradually, indicating the phase transition from the Lalphav phase to the Lalphal phase. Correspondingly, phosphorus nuclear magnetic resonance spectra (31P NMR) presented changes in both the chemical shift and the peak width, indicating that these two types of bilayer structures are of different anisotropy degrees and different viscosities. When the Lalphal phase is subjected to a certain shear force, it can be reversed to a Lalphav phase again, which was proved by rheological, 2H NMR, and 31P NMR measurements. Furthermore, a theoretical consideration about the formation of the defective and undulating Lalphal phase was taken into account from a viewpoint of energy.
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Affiliation(s)
- Zaiwu Yuan
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China
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50
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Fujii S, Koschoreck S, Lindner P, Richtering W. Influence of a triblock copolymer on phase behavior and shear-induced topologies of a surfactant lamellar phase. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:5476-5483. [PMID: 19388635 DOI: 10.1021/la802943d] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The influence of a triblock copolymer, poly(ethylene oxide)20-b-poly(propylene oxide)70-b-poly(ethylene oxide)20 (Pluronic P123) on the phase behavior and on the shear-induced multilamellar vesicle (MLV, also called Onion) formation in the lyotropic lamellar phase of the nonionic surfactant C10E3 was investigated by means of rheology, small-angle neutron scattering (SANS), and microscopy. Added triblock copolymer shifted the Lalpha-L3 phase transition to lower temperatures. In the presence of triblock copolymer, MLV structure was not stable and easily transformed back into the lamellar phase with increasing polymer concentration and temperature. In the study of the shear-induced MLV formation, we found an increase of the critical shear rate for the onset of the shear-thickening, which also indicates the instability of MLV in the presence of the triblock copolymer. No MLV formation was observed at high polymer concentration. Suppression of the shear-induced MLV formation might be attributed to the enhancement of the effective surface tension originating from the excluded volume effect between polymers adsorbed onto the membranes.
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Affiliation(s)
- S Fujii
- Physical Chemistry, RWTH Aachen University, Landoltweg 2, 52070 Aachen, Germany.
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