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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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Gentile L. Ferrihydrite nanoparticles entrapped in shear-induced multilamellar vesicles. J Colloid Interface Sci 2022; 606:1890-1896. [PMID: 34689045 DOI: 10.1016/j.jcis.2021.09.192] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 09/28/2021] [Accepted: 09/29/2021] [Indexed: 10/20/2022]
Abstract
HYPOTHESIS Ferrihydrite (Fh) nanoparticles are receiving considerable scientific interest due to their large reactive surface areas, crystalline structures, and nanoparticle morphology. They are of great importance in biogeochemical processes and have the ability to sequester hazardous and toxic substances. Here, the working hypothesis was to entrap fractal-like Fh nanoparticles, with a radius of gyration of 6.2 nm and a primary building block of polydisperse spheres with a radius of 0.8 nm, in a shear-induced multilamellar vesicle (MLV) state using a 40 wt% polyethylene glycol dodecyl ether surfactant. EXPERIMENTS Small- and Wide- Angle X-ray scattering revealed the equilibrium state of the non-ionic planar lamellar phase, the Fh dispersion, and their mixture. The MLV state was induced by using a shear flow in a Taylor-Couette geometry of a rheometer. FINDINGS The nonionic surfactant initially exhibited a lamellar gel phase with two distinct d-spacings of 11.0 and 9.7 nm, which collapsed into the MLV state under shear flow. The Fh nanoparticles induced bilayer attraction by suppressing lamellar layer undulations, decreasing the d-spacing. These results are helpful in the understanding of the relationship between nanoparticle size and nanoparticle-bilayers interactions and provides insight on Fh encapsulations in a kinetically stable MLVs state.
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Affiliation(s)
- Luigi Gentile
- Department of Chemistry, University of Bari "Aldo Moro", Via Orabona 4, Bari 70126, Italy; Center of Colloid and Surface Science (CSGI) Bari Unit, Via Orabona 4 Bari 70126, Italy.
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Donina L, Rafique A, Khodaparast S, Porcar L, Cabral JT. Lamellar-to-MLV transformation in SDS/octanol/brine examined by microfluidic-SANS and polarised microscopy. SOFT MATTER 2021; 17:10053-10062. [PMID: 34713873 DOI: 10.1039/d1sm01215k] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The lamellar-to-multilamellar vesicle (MLV) transformation in a model surfactant system, sodium dodecyl sulfate (SDS), octanol and brine, is investigated under continuous and oscillatory microfluidic contraction-expansion flows, employing polarised optical microscopy and small angle neutron scattering (SANS), with sample volume probed down to ≃20 nL. We determine the lamellar-to-MLV transition requirements at varying flow velocity, oscillation amplitude, frequency, and number of oscillatory cycles. The spatio-temporal evolution of the hierarchical fluid structure is elucidated: lamellar sheets initially align with flow direction upon entering a constriction and then perpendicularly upon exiting; the formation of MLVs at the nanoscale is first observed by SANS within a few (<5) oscillatory cycles, followed by the gradual appearance of a regular (albeit not crystalline) MLV arrangement, at the micronscale, by optical microscopy after tens of cycles, under the conditions investigated. Once MLVs form under flow, these remain metastable for several days.
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Affiliation(s)
- Liva Donina
- Department of Chemical Engineering, Imperial College London, London SW7 2AZ, UK.
| | - Aysha Rafique
- Department of Chemical Engineering, Imperial College London, London SW7 2AZ, UK.
| | - Sepideh Khodaparast
- Department of Chemical Engineering, Imperial College London, London SW7 2AZ, UK.
| | - Lionel Porcar
- Institut Laue-Langevin, 71 Avenue des Martyrs, B.P. 156, F-38042 Grenoble CEDEX, France
| | - João T Cabral
- Department of Chemical Engineering, Imperial College London, London SW7 2AZ, UK.
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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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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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Xu N, Wei J, Kawaguchi Y. Dynamic and Energy Analysis on the Viscosity Transitions with Increasing Temperature under Shear for Dilute CTAC Surfactant Solutions. Ind Eng Chem Res 2016. [DOI: 10.1021/acs.iecr.5b04659] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Na Xu
- State
Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China
| | - Jinjia Wei
- State
Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China
| | - Yasuo Kawaguchi
- Department
of Mechanical Engineering, Faculty of Science and Technology, Tokyo University of Science, Noda, Chiba 278-8510, Japan
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Gupta S, Camargo M, Stellbrink J, Allgaier J, Radulescu A, Lindner P, Zaccarelli E, Likos CN, Richter D. Dynamic phase diagram of soft nanocolloids. NANOSCALE 2015; 7:13924-13934. [PMID: 26219628 DOI: 10.1039/c5nr03702f] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
We present a comprehensive experimental and theoretical study covering micro-, meso- and macroscopic length and time scales, which enables us to establish a generalized view in terms of structure-property relationship and equilibrium dynamics of soft colloids. We introduce a new, tunable block copolymer model system, which allows us to vary the aggregation number, and consequently its softness, by changing the solvophobic-to-solvophilic block ratio (m : n) over two orders of magnitude. Based on a simple and general coarse-grained model of the colloidal interaction potential, we verify the significance of interaction length σint governing both structural and dynamic properties. We put forward a quantitative comparison between theory and experiment without adjustable parameters, covering a broad range of experimental polymer volume fractions (0.001 ≤ϕ≤ 0.5) and regimes from ultra-soft star-like to hard sphere-like particles, that finally results in the dynamic phase diagram of soft colloids. In particular, we find throughout the concentration domain a strong correlation between mesoscopic diffusion and macroscopic viscosity, irrespective of softness, manifested in data collapse on master curves using the interaction length σint as the only relevant parameter. A clear reentrance in the glass transition at high aggregation numbers is found, recovering the predicted hard-sphere (HS) value in the hard-sphere like limit. Finally, the excellent agreement between our new experimental systems with different but already established model systems shows the relevance of block copolymer micelles as a versatile realization of soft colloids and the general validity of a coarse-grained approach for the description of the structure and dynamics of soft colloids.
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Affiliation(s)
- Sudipta Gupta
- JCNS-1 and ICS-1, Forschungszentrum Jülich, Leo-Brandt-Straße, 52425 Jülich, Germany.
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Lupi FR, Gentile L, Gabriele D, Mazzulla S, Baldino N, de Cindio B. Olive oil and hyperthermal water bigels for cosmetic uses. J Colloid Interface Sci 2015; 459:70-78. [PMID: 26263497 DOI: 10.1016/j.jcis.2015.08.013] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2015] [Revised: 08/04/2015] [Accepted: 08/05/2015] [Indexed: 11/25/2022]
Abstract
Bigels are biphasic systems produced with an organogel (or oleogel) and a hydrogel mixed together at high shear rates. These systems are promising for different uses, among them the formulation of new cosmetic matrices for cosmetic agents delivery is under investigation. In the present paper, a common cosmetic formulation for skin care was enriched with increasing fractions of monoglycerides of fatty acids/olive oil organogels, in order to understand the rheology and the microstructure of these systems. Small amplitude oscillation tests, NMR-self diffusion analysis, contrast phase microscopy and electric conductivity confirmed that the addition of the organogel caused a microstructural change of the starting material, which turned from O/W to a more complex system where, probably, a matrix-in-matrix structure is present at the highest fractions of added organogel.
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Affiliation(s)
- F R Lupi
- Department of Information, Modeling, Electronics and System Engineering (D.I.M.E.S.), University of Calabria, Via P. Bucci, Cubo 39C, I-87036 Rende, CS, Italy.
| | - L Gentile
- Department of Chemistry and Chemical Technologies, University of Calabria, Via P. Bucci, Cubo 14D, I-87036 Rende, CS, Italy.
| | - D Gabriele
- Department of Information, Modeling, Electronics and System Engineering (D.I.M.E.S.), University of Calabria, Via P. Bucci, Cubo 39C, I-87036 Rende, CS, Italy.
| | - S Mazzulla
- Department of Biology, Ecology and Earth Science (Di.B.E.S.T.), University of Calabria, Via P. Bucci, Cubo 6C, I-87036 Rende, CS, Italy.
| | - N Baldino
- Department of Information, Modeling, Electronics and System Engineering (D.I.M.E.S.), University of Calabria, Via P. Bucci, Cubo 39C, I-87036 Rende, CS, Italy.
| | - B de Cindio
- Department of Information, Modeling, Electronics and System Engineering (D.I.M.E.S.), University of Calabria, Via P. Bucci, Cubo 39C, I-87036 Rende, CS, Italy.
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