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Möller J, Léonardon J, Gorini J, Dattani R, Narayanan T. A sub-ms pressure jump setup for time-resolved X-ray scattering. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2016; 87:125116. [PMID: 28040915 DOI: 10.1063/1.4972296] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We present a new experimental setup for time-resolved solution small-angle X-ray scattering (SAXS) studies of kinetic processes induced by sub-ms hydrostatic pressure jumps. It is based on a high-force piezo-stack actuator, with which the volume of the sample can be dynamically compressed. The presented setup has been designed and optimized for SAXS experiments with absolute pressures of up to 1000 bars, using transparent diamond windows and an easy-to-change sample capillary. The pressure in the cell can be changed in less than 1 ms, which is about an order of magnitude faster jump than previously obtained by dynamic pressure setups for SAXS. An additional temperature control offers the possibility for automated mapping of p-T phase diagrams. Here we present the technical specifications and first experimental data taken together with a preview of new research opportunities enabled by this setup.
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Appel M, Spehr TL, Wipf R, Stühn B. Water–AOT–alkylbenzene microemulsions: Influence of alkyl chain length on structure and percolation behavior. J Colloid Interface Sci 2012; 376:140-5. [DOI: 10.1016/j.jcis.2012.02.062] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2012] [Revised: 02/23/2012] [Accepted: 02/25/2012] [Indexed: 10/28/2022]
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Sasuga S, Weihs D, Talmon Y, Okabayashi HF, O’Connor CJ. Aggregate Structures of Asymmetric Di-Alkyl Phosphate Anions and the Role of Conformations about the Polar Region: SANS, Cryo-TEM, Raman Scattering, 13C NMR, and Selective NOE Studies. J Phys Chem B 2012; 116:3538-50. [DOI: 10.1021/jp300019n] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sonoko Sasuga
- Department of Applied
Chemistry, Nagoya Institute of Technology, Gokiso-cho, Showa-ku,
Aichi 466-8555, Japan
| | - Daphne Weihs
- Faculty of Biomedical
Engineering, Technion-Israel Institute of Technology,
Haifa 32000, Israel
| | - Yeshayahu Talmon
- Faculty
of Chemical Engineering, Technion-Israel Institute of Technology, Haifa 32000,
Israel
| | - Hiro-Fumi Okabayashi
- Department of Applied
Chemistry, Nagoya Institute of Technology, Gokiso-cho, Showa-ku,
Aichi 466-8555, Japan
| | - Charmian J. O’Connor
- Department
of Chemistry, The University of Auckland, Private Bag 92019, Auckland
1142, New Zealand
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Okabayashi HF, Izawa KI, Sumiya A, Eastoe J, O’Connor CJ. Role of the Succinate Skeleton in the Disorder–Order Transition of AOT and Its Analogous Molecules: Detection by Infrared Absorption Spectra of the Configurations Arising from the Difference in Torsion Angles of the Succinate Skeleton. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2010. [DOI: 10.1246/bcsj.20100002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Müller M, Stühn B, Busse K, Kressler J. Modification of a reverse microemulsion with a fluorinated triblock copolymer. J Colloid Interface Sci 2009; 335:228-33. [DOI: 10.1016/j.jcis.2009.03.085] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2008] [Revised: 03/09/2009] [Accepted: 03/09/2009] [Indexed: 10/20/2022]
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Ghosh SK, Ichiyanagi N, Okabayashi HF, Yoshino AH, Takeda T, O’Connor CJ. Effect of Hydration on the Very Slow Droplet–Lamellar Transition in Dioleylsulfosuccinate/Decane/Water System: A Small Angle X-ray Scattering Study. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2009. [DOI: 10.1246/bcsj.82.664] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Nagao M, Seto H. Concentration dependence of shape and structure fluctuations of droplet microemulsions investigated by neutron spin echo spectroscopy. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2008; 78:011507. [PMID: 18763961 DOI: 10.1103/physreve.78.011507] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2008] [Indexed: 05/26/2023]
Abstract
We describe dynamic modes that originate from shape and structure fluctuations in a droplet microemulsion system. The modes are decoupled by a contrast variation neutron scattering technique using the relative intermediate form factor method. The strategy of the method is analogous to the relative form factor method, which decouples the form and structure factors from the small-angle neutron scattering intensity [M. Nagao, Phys. Rev. E 75, 061401 (2007)]. First, we will briefly explain theoretical and experimental approaches to understanding neutron spin echo (NSE) data from droplet microemulsion systems. Then we will introduce the relative intermediate form factor method, which decouples shape and structure fluctuations. The concentration dependence of the droplet dynamics in a microemulsion system is used to elucidate the strengths of this method. The intermediate form and structure factors are successfully decoupled from an observed intermediate scattering function by NSE. The decay rate of the shape fluctuation modes linearly decreases, while the fluctuation amplitude increases as the droplet concentration increases. The first cumulant of the obtained intermediate structure factor shows a clear de Gennes narrowing behavior at a length scale corresponding to the interdroplet distance. However, in the high-momentum-transfer and longer-time regions, the first cumulant deviates from the intermediate structure factor. This result suggests the existence of other dynamic modes of structure fluctuations rather than the center-of-mass diffusion mode.
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Affiliation(s)
- Michihiro Nagao
- NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-6102, USA.
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Blochowicz T, Gögelein C, Spehr T, Müller M, Stühn B. Polymer-induced transient networks in water-in-oil microemulsions studied by small-angle x-ray and dynamic light scattering. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2007; 76:041505. [PMID: 17994992 DOI: 10.1103/physreve.76.041505] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2007] [Indexed: 05/25/2023]
Abstract
We study water-in-oil microemulsions, in particular dispersions of water droplets coated with a monolayer of the anionic surfactant AOT in a continuous phase of n -decane. Upon addition of the amphiphilic triblock copolymer PEO(polyethylenoxide)-PI(polyisoprene)-PEO, a transient network is formed. At constant droplet size we vary the polymer concentration and there is clear evidence for an increasing crosslinking of the droplets from structural investigations with small-angle x-ray scattering. The dynamics of concentration fluctuations consisting of the translational diffusion of the droplets and the relaxation of the network are monitored with photon correlation spectroscopy. We mainly focus on the variation of the dynamic behavior as a function of the number of polymer molecules per droplet and the droplet volume fraction, which may be taken as a measure for the interdroplet distance. With increasing polymer content the dynamics of the system slows down and three different relaxation processes may be distinguished. We discuss the origin of the different relaxation modes. In particular, it turns out that the intermediate relaxation mode may be suppressed by index matching the oil matrix and the PI block and that it is effectively slowed down by an additional loading of the emulsion droplets with polyethylene glycol of increasing molecular weight.
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Nagao M, Seto H, Yamada NL. Interaction between droplets in a ternary microemulsion evaluated by the relative form factor method. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2007; 75:061401. [PMID: 17677257 DOI: 10.1103/physreve.75.061401] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2006] [Revised: 02/16/2007] [Indexed: 05/16/2023]
Abstract
This paper describes the concentration dependence of the interaction between water droplets coated by a surfactant monolayer using the contrast variation small-angle neutron scattering technique. In the first part, we explain the idea of how to extract a relatively model free structure factor from the scattering data, which is called the relative form factor method. In the second part, the experimental results for the shape of the droplets (form factor) are described. In the third part the relatively model free structure factor is shown, and finally the concentration dependence of the interaction potential between droplets is discussed. The result indicates the validity of the relative form factor method, and the importance of the estimation of the model free structure factor to discuss the nature of structure formation in microemulsion systems.
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Affiliation(s)
- Michihiro Nagao
- Cyclotron Facility, Indiana University, Bloomington, Indiana 47408-1398, USA.
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Ruegg ML, Reynolds BJ, Lin MY, Lohse DJ, Krishnamoorti R, Balsara NP. Effect of Pressure on a Multicomponent A/B/A−C Polymer Blend with Attractive and Repulsive Interactions. Macromolecules 2006. [DOI: 10.1021/ma061894w] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Megan L. Ruegg
- Department of Chemical Engineering, University of California, Berkeley, California 94720; Earth Science Division, Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720; Materials Sciences Division and Environmental Energy Technologies Division, Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720; ExxonMobil Research and Engineering, Annandale, New Jersey 08801; and Department of Chemical Engineering, University of Houston,
| | - Benedict J. Reynolds
- Department of Chemical Engineering, University of California, Berkeley, California 94720; Earth Science Division, Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720; Materials Sciences Division and Environmental Energy Technologies Division, Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720; ExxonMobil Research and Engineering, Annandale, New Jersey 08801; and Department of Chemical Engineering, University of Houston,
| | - Min Y. Lin
- Department of Chemical Engineering, University of California, Berkeley, California 94720; Earth Science Division, Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720; Materials Sciences Division and Environmental Energy Technologies Division, Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720; ExxonMobil Research and Engineering, Annandale, New Jersey 08801; and Department of Chemical Engineering, University of Houston,
| | - David J. Lohse
- Department of Chemical Engineering, University of California, Berkeley, California 94720; Earth Science Division, Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720; Materials Sciences Division and Environmental Energy Technologies Division, Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720; ExxonMobil Research and Engineering, Annandale, New Jersey 08801; and Department of Chemical Engineering, University of Houston,
| | - Ramanan Krishnamoorti
- Department of Chemical Engineering, University of California, Berkeley, California 94720; Earth Science Division, Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720; Materials Sciences Division and Environmental Energy Technologies Division, Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720; ExxonMobil Research and Engineering, Annandale, New Jersey 08801; and Department of Chemical Engineering, University of Houston,
| | - Nitash P. Balsara
- Department of Chemical Engineering, University of California, Berkeley, California 94720; Earth Science Division, Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720; Materials Sciences Division and Environmental Energy Technologies Division, Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720; ExxonMobil Research and Engineering, Annandale, New Jersey 08801; and Department of Chemical Engineering, University of Houston,
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Nagao M, Seto H, Ihara D, Shibayama M, Takeda T. Pressure-induced hexagonal phase in a ternary microemulsion system composed of a nonionic surfactant, water, and oil. J Chem Phys 2005; 123:054705. [PMID: 16108683 DOI: 10.1063/1.1993559] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The pressure-induced phase transition in a microemulsion, consisting of pentaethylene glycol mono-n-dodecyl ether, water, and n-octane, was investigated by means of small-angle neutron scattering. A pressure-induced phase transition from a lamellar structure to a hexagonal structure was observed. The temperature-pressure phase boundary shows a positive slope with dTdP approximately 0.09 KMPa. The structure unit of the high-pressure hexagonal phase was an oil-in-water cylinder with the membrane thickness of 15.5 A, identical to the low-temperature hexagonal phase. Pressurizing was found to have the same effect by decreasing temperature. This behavior was satisfactorily explained with the pressure dependence of the spontaneous curvature of surfactant membranes. That is, the volume change of surfactant tails plays a dominant role in the structure change of the microemulsion with applying pressure.
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Affiliation(s)
- Michihiro Nagao
- Institute for Solid State Physics, The University of Tokyo, 106-1 Shirakata, Tokai 319-1106, Japan.
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Tanaka R, Yokoyama T, Sameshima K, Kawase T. Growth of AOT Reversed Micelles and the Solvent Effect Investigated by Dielectric and Light-Scattering Measurements. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2005. [DOI: 10.1246/bcsj.78.599] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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