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Titolo:
Isotropic-nematic phase separation in suspensions of polydisperse colloidal platelets
Autore:
van der Kooij, FM; van der Beek, D; Lekkerkerker, HNW;
Indirizzi:
Univ Utrecht, Debye Inst, Vant Hoff Lab Phys & Colloid Chem, NL-3584 CH Utrecht, Netherlands Univ Utrecht Utrecht Netherlands NL-3584 CH 3584 CH Utrecht, Netherlands
Titolo Testata:
JOURNAL OF PHYSICAL CHEMISTRY B
fascicolo: 9, volume: 105, anno: 2001,
pagine: 1696 - 1700
SICI:
1520-6106(20010308)105:9<1696:IPSISO>2.0.ZU;2-T
Fonte:
ISI
Lingua:
ENG
Soggetto:
HARD-ROD MIXTURES; DISPERSIONS; TRANSITION; BEHAVIOR; PARTICLES; SYSTEMS; POLYMER; CORE; EQUILIBRIUM; CRYSTALS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
37
Recensione:
Indirizzi per estratti:
Indirizzo: Lekkerkerker, HNW Univ Utrecht, Debye Inst, Vant Hoff Lab Phys & Colloid Chem, Padualaan 8, NL-3584 CH Utrecht, Netherlands Univ Utrecht Padualaan 8 Utrecht Netherlands NL-3584 CH
Citazione:
F.M. van der Kooij et al., "Isotropic-nematic phase separation in suspensions of polydisperse colloidal platelets", J PHYS CH B, 105(9), 2001, pp. 1696-1700

Abstract

We are studying the phase behavior of a suspension of platelike colloids which has a very broad size distribution, particularly in thickness. This suspension exhibits an isotropic--nematic phase separation over a notably wide range of particle concentrations, displaying a remarkable phenomenon. In part of the coexistence region, phase separation yields a nematic upper phase in coexistence with an isotropic bottom phase. If the nematic phase is isolated and diluted, the reverse situation is observed such that the isotropic phase now becomes the upper phase. We show that these phenomena can be explained by a pronounced fractionation with respect to platelet thickness.

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Documento generato il 06/04/20 alle ore 08:27:22