Influence of shear on solvated amphiphilic block copolymers with lamellar morphology

Johannes Zipfel; Jörg Berghausen; Gudrun Schmidt; Peter Lindner; Paschalis Alexandridis; Walter Richtering

doi:10.1021/ma0116912

Influence of shear on solvated amphiphilic block copolymers with lamellar morphology

Johannes Zipfel
, Jörg Berghausen
, Gudrun Schmidt
, Peter Lindner
, Paschalis Alexandridis
, Walter Richtering

Department of Chemical and Biological Engineering

Institut Laue-Langevin
Solvias AG
Louisiana State University
Kiel University

Research output: Contribution to journal › Article › peer-review

43 Scopus citations

Abstract

The effect of shear on lyotropic lamellar phases consisting of amphiphilic block copolymers was studied by in situ small-angle neutron scattering (SANS) and rheo-optics. Two different ternary systems containing a commercially available Pluronic type poly(ethylene oxide)-b-poly(propylene oxide)-b-poly(ethylene oxide) block copolymer, P123 (EO₂₀PO₇₀EO₂₀) or F127 (EO₁₀₀PO₇₀EO₁₀₀), as well as water and butanol were investigated over a wide range of concentrations. Orientation diagrams were constructed for both ternary systems; both exhibited a parallel-to-perpendicular transition of planar lamellae and a shear-induced formation of multilamellar vesicles (also termed liposomes, onions, or spherulites). For both systems, the vesicle formation occurred at low polymer content close to the phase boundary of the lamellar region and was accompanied by shear thickening. In addition, the kinetics and temperature dependence of the parallel-to-perpendicular transition were studied.

Original language	English
Pages (from-to)	4064-4074
Number of pages	11
Journal	Macromolecules
Volume	35
Issue number	10
DOIs	https://doi.org/10.1021/ma0116912
State	Published - May 7 2002

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10.1021/ma0116912

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title = "Influence of shear on solvated amphiphilic block copolymers with lamellar morphology",

abstract = "The effect of shear on lyotropic lamellar phases consisting of amphiphilic block copolymers was studied by in situ small-angle neutron scattering (SANS) and rheo-optics. Two different ternary systems containing a commercially available Pluronic type poly(ethylene oxide)-b-poly(propylene oxide)-b-poly(ethylene oxide) block copolymer, P123 (EO20PO70EO20) or F127 (EO100PO70EO100), as well as water and butanol were investigated over a wide range of concentrations. Orientation diagrams were constructed for both ternary systems; both exhibited a parallel-to-perpendicular transition of planar lamellae and a shear-induced formation of multilamellar vesicles (also termed liposomes, onions, or spherulites). For both systems, the vesicle formation occurred at low polymer content close to the phase boundary of the lamellar region and was accompanied by shear thickening. In addition, the kinetics and temperature dependence of the parallel-to-perpendicular transition were studied.",

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T1 - Influence of shear on solvated amphiphilic block copolymers with lamellar morphology

AU - Zipfel, Johannes

AU - Berghausen, Jörg

AU - Schmidt, Gudrun

AU - Lindner, Peter

AU - Alexandridis, Paschalis

AU - Richtering, Walter

PY - 2002/5/7

Y1 - 2002/5/7

N2 - The effect of shear on lyotropic lamellar phases consisting of amphiphilic block copolymers was studied by in situ small-angle neutron scattering (SANS) and rheo-optics. Two different ternary systems containing a commercially available Pluronic type poly(ethylene oxide)-b-poly(propylene oxide)-b-poly(ethylene oxide) block copolymer, P123 (EO20PO70EO20) or F127 (EO100PO70EO100), as well as water and butanol were investigated over a wide range of concentrations. Orientation diagrams were constructed for both ternary systems; both exhibited a parallel-to-perpendicular transition of planar lamellae and a shear-induced formation of multilamellar vesicles (also termed liposomes, onions, or spherulites). For both systems, the vesicle formation occurred at low polymer content close to the phase boundary of the lamellar region and was accompanied by shear thickening. In addition, the kinetics and temperature dependence of the parallel-to-perpendicular transition were studied.

AB - The effect of shear on lyotropic lamellar phases consisting of amphiphilic block copolymers was studied by in situ small-angle neutron scattering (SANS) and rheo-optics. Two different ternary systems containing a commercially available Pluronic type poly(ethylene oxide)-b-poly(propylene oxide)-b-poly(ethylene oxide) block copolymer, P123 (EO20PO70EO20) or F127 (EO100PO70EO100), as well as water and butanol were investigated over a wide range of concentrations. Orientation diagrams were constructed for both ternary systems; both exhibited a parallel-to-perpendicular transition of planar lamellae and a shear-induced formation of multilamellar vesicles (also termed liposomes, onions, or spherulites). For both systems, the vesicle formation occurred at low polymer content close to the phase boundary of the lamellar region and was accompanied by shear thickening. In addition, the kinetics and temperature dependence of the parallel-to-perpendicular transition were studied.

UR - https://www.scopus.com/pages/publications/0037035662

U2 - 10.1021/ma0116912

DO - 10.1021/ma0116912

M3 - Article

AN - SCOPUS:0037035662

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VL - 35

SP - 4064

EP - 4074

JO - Macromolecules

JF - Macromolecules

IS - 10

ER -

Influence of shear on solvated amphiphilic block copolymers with lamellar morphology

Abstract

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