Phase-separation of miscible liquids in a centrifuge
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Phase-separation of miscible liquids in a centrifuge
We show that a liquid mixture in the thermodynamically stable homogeneous phase can undergo a phaseseparation transition when rotated at sufficiently high frequency ω. This phase-transition is different from the usual case where two liquids are immiscible or where the slow sedimentation process of one component (e.g. a polymer) is accelerated due to centrifugation. For a binary mixture, the mai...
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Jiro Kumaki,1 Takeji Hashimoto,1,2 and Steve Granick3 1Hashimoto Polymer Phasing Project, ERATO, JRDC, Keihanna Plaza, Seika, Kyoto 619-02, Japan 2Division of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 606-01, Japan 3Department of Materials Science and Engineering, University of Illinois, Urbana, Illinois 61801 (Received 27 February 1996) Phase separation occurre...
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Evidence of the existence of a transient surface tension between two miscible fluid phases is given. This is done by making use of a density matched free of gravity perturbations, binary liquid of isobutyric acid and water, which presents a miscibility gap and is studied by light scattering. The experiment is performed very near the critical point of the binary liquid, where the diffusion of ph...
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The phase separation of ionic liquids (ILs) in water is studied by laser light scattering (LLS). For the ILs with longer alkyl chains, such as [C(8)mim]BF(4) and [C(6)mim]BF(4) (mim = methylimidazolium), macroscopic phase separation occurs in the mixture with water. LLS also reveals the coexistence of the mesoscopic phase, the size of which is in the order of 100-800 nm. In aqueous mixtures of ...
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ژورنال
عنوان ژورنال: Comptes Rendus Physique
سال: 2007
ISSN: 1631-0705
DOI: 10.1016/j.crhy.2007.09.017