Micelle structure in isotropic aqueous colloids of a poly(oxyethylene) amphiphile C12E8

Matsumoto, Takayoshi; Zenkoh, Hirofumi

doi:10.1007/bf01410295

Cited by 15 publications

(9 citation statements)

References 25 publications

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“…We do not explicitly consider the influence of micelles on the dynamics of the process we describe here, although there is evidence that C 12 E 8 forms small spherical micelles over a wide range of concentrations above the CMC. 42 At larger concentrations, the dynamics of breaking and reforming micelles near the interface may introduce additional time scales into the transport of surfactants to the oil-water interface.…”

Section: -3mentioning

confidence: 99%

Microscale tipstreaming in a microfluidic flow focusing device

2006

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A microfluidic flow-focusing device is used to explore the use of surfactant-mediated tipstreaming to synthesize micrometer-scale and smaller droplets. By controlling the surfactant bulk concentration of a soluble nonionic surfactant in the neighborhood of the critical micelle concentration, along with the capillary number and the ratio of the internal and external flow rates, we observe several distinct modes of droplet breakup. For the most part, droplet breakup in microfluidic devices results in highly monodisperse droplets in the range of tens of micrometers in size. However, we observe a new mode of breakup called "thread formation" that resembles tipstreaming and yields tiny droplets in the range of a few micrometers in size or smaller. In this work, we characterize the growth of the thread and its maximum length as a function of flow variables and surfactant content, and we also characterize the period of droplet breakup as a function of these variables. Our results suggest possible methods for controlling the process. Using a simple flow visualization experiment as the basis, we report on preliminary efforts to model the thread formation process.

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Section: -3mentioning

confidence: 99%

Microscale tipstreaming in a microfluidic flow focusing device

2006

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“…In this paper, we present the results of a study about the aggregation behavior of mixed solutions of n-octyl-b-D-thioglucoside (OTG), a sugar-based surfactant belonging to the alkylpolyglucoside family, and the conventional ethoxylated surfactant C 12 E 8 (see structures in Chart 1). We have selected this non-ionic pair because the aggregation behavior of both surfactants in pure status, which has been previously well characterized [18][19][20][21][22], shows significant differences. In particular, it has been observed that the size of the micelles of OTG and C 12 E 8 shows opposite trend with temperature changes.…”

Section: Introductionmentioning

confidence: 99%

Characterization of mixed non-ionic surfactants n-octyl-β-d-thioglucoside and octaethylene–glycol monododecyl ether: Micellization and microstructure

Ruiz

Molina-Bolı́var

2011

Journal of Colloid and Interface Science

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“…Water is available everywhere, is cheap and the measurements should be reproducible. Moreover, water is already used as a secondary standard for SANS because of the strong incoherent scattering; it is also sometimes used in light-scattering techniques (Matsumoto & Zenkoh, 1990;Lindner & Glatter, 2000). Another important advantage is that the scattering of water comes from number¯uctuations and therefore only depends on the physical property of isothermal compressibility (Zemb & Charpin, 1985).…”

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confidence: 99%

SAXS experiments on absolute scale with Kratky systems using water as a secondary standard

2000

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For small-angle scattering, of X-rays (SAXS) and neutrons (SANS), the importance of absolute calibration has been recognized since the inception of the technique. The work reported here focuses on SAXS measurements using Kratky slit systems. In former days, only molecular weights or scattering per particle were determined, but today absolute calibration implies the use of the unit of cm À1 for the scattering curve. It is necessary to measure the so-called absolute intensity, which is the ratio of the scattering intensity to the primary intensity P 0 . Basically there are two possible ways to determine the absolute intensity. The ®rst one is the direct method, which involves the mechanical attenuation of the primary beam by a rotating disc or a moving slit. The second is the indirect method, using secondary standards. Water is well suited as a calibration standard because of the angle-independent scattering. The essential advantage is that the scattering of water only depends on the physical property of isothermal compressibility. Before presenting an example of the practical performance of this method, the most important theoretical equations for an SAS experiment on the absolute scale are summarized. With the slit collimation system, the scattering curve of water can be measured with high enough statistical accuracy. As a ®rst example, the scattering curve of the protein lysozyme on the absolute scale is presented. The second example is the determination of the aggregation number of a triblock copolymer P94 (EO 17 ± PO 42 ±EO 17 ). Taking into account that at least 10% of the polymer sample consists of diblocks, the accuracy of around 10% for the determined aggregation number is rather good. The data of P94 are also considered on the particle scale in order to obtain the radial scattering-length density distribution.

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Micelle structure in isotropic aqueous colloids of a poly(oxyethylene) amphiphile C12E8

Cited by 15 publications

References 25 publications

Microscale tipstreaming in a microfluidic flow focusing device

Microscale tipstreaming in a microfluidic flow focusing device

Characterization of mixed non-ionic surfactants n-octyl-β-d-thioglucoside and octaethylene–glycol monododecyl ether: Micellization and microstructure

SAXS experiments on absolute scale with Kratky systems using water as a secondary standard

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