Self-assembly of amphiphilic block copolymers in ternary solvent mixtures: Lyotropic liquid crystalline phase behavior and structure

Biswajit Sarkar; Jinendra Lakshmichand; Paschalis Alexandridis

doi:10.1002/macp.201200438

Self-assembly of amphiphilic block copolymers in ternary solvent mixtures: Lyotropic liquid crystalline phase behavior and structure

Biswajit Sarkar
, Jinendra Lakshmichand
, Paschalis Alexandridis

Department of Chemical and Biological Engineering

SUNY Buffalo

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

19 Scopus citations

Abstract

The effects of the simultaneous addition of two organic solvents (glycerol and ethanol) on the lyotropic liquid crystalline (LLC) phase behavior and structure formed by PEO-PPO-PEO amphiphilic block copolymers in water are examined. Glycerol and ethanol have been selected because of their opposite effect: structure promoting and structure dissolving, respectively. Lattice parameters of Pluronic P105 (EO₃₇PO₅₈EO₃₇) and F127 (EO₁₀₀PO₇₀EO₁₀₀) LLC samples in the presence of any type and amount of E + G solvents decrease with increasing volume fraction of the PPO-rich domains. Lattice parameters for the two block copolymers fall on the same line when normalized with the square root of polymer molecular weight, suggesting weak block segregation.

Original language	English
Pages (from-to)	2514-2528
Number of pages	15
Journal	Macromolecular Chemistry and Physics
Volume	213
Issue number	23
DOIs	https://doi.org/10.1002/macp.201200438
State	Published - Dec 13 2012

Keywords

Block copolymers
Hydrogels
Phase diagrams
Self-assembly
Small-angle X-ray scattering

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10.1002/macp.201200438

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title = "Self-assembly of amphiphilic block copolymers in ternary solvent mixtures: Lyotropic liquid crystalline phase behavior and structure",

abstract = "The effects of the simultaneous addition of two organic solvents (glycerol and ethanol) on the lyotropic liquid crystalline (LLC) phase behavior and structure formed by PEO-PPO-PEO amphiphilic block copolymers in water are examined. Glycerol and ethanol have been selected because of their opposite effect: structure promoting and structure dissolving, respectively. Lattice parameters of Pluronic P105 (EO37PO58EO37) and F127 (EO100PO70EO100) LLC samples in the presence of any type and amount of E + G solvents decrease with increasing volume fraction of the PPO-rich domains. Lattice parameters for the two block copolymers fall on the same line when normalized with the square root of polymer molecular weight, suggesting weak block segregation.",

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author = "Biswajit Sarkar and Jinendra Lakshmichand and Paschalis Alexandridis",

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T1 - Self-assembly of amphiphilic block copolymers in ternary solvent mixtures

T2 - Lyotropic liquid crystalline phase behavior and structure

AU - Sarkar, Biswajit

AU - Lakshmichand, Jinendra

AU - Alexandridis, Paschalis

PY - 2012/12/13

Y1 - 2012/12/13

N2 - The effects of the simultaneous addition of two organic solvents (glycerol and ethanol) on the lyotropic liquid crystalline (LLC) phase behavior and structure formed by PEO-PPO-PEO amphiphilic block copolymers in water are examined. Glycerol and ethanol have been selected because of their opposite effect: structure promoting and structure dissolving, respectively. Lattice parameters of Pluronic P105 (EO37PO58EO37) and F127 (EO100PO70EO100) LLC samples in the presence of any type and amount of E + G solvents decrease with increasing volume fraction of the PPO-rich domains. Lattice parameters for the two block copolymers fall on the same line when normalized with the square root of polymer molecular weight, suggesting weak block segregation.

AB - The effects of the simultaneous addition of two organic solvents (glycerol and ethanol) on the lyotropic liquid crystalline (LLC) phase behavior and structure formed by PEO-PPO-PEO amphiphilic block copolymers in water are examined. Glycerol and ethanol have been selected because of their opposite effect: structure promoting and structure dissolving, respectively. Lattice parameters of Pluronic P105 (EO37PO58EO37) and F127 (EO100PO70EO100) LLC samples in the presence of any type and amount of E + G solvents decrease with increasing volume fraction of the PPO-rich domains. Lattice parameters for the two block copolymers fall on the same line when normalized with the square root of polymer molecular weight, suggesting weak block segregation.

KW - Block copolymers

KW - Hydrogels

KW - Phase diagrams

KW - Self-assembly

KW - Small-angle X-ray scattering

UR - https://www.scopus.com/pages/publications/84872338916

U2 - 10.1002/macp.201200438

DO - 10.1002/macp.201200438

M3 - Article

AN - SCOPUS:84872338916

SN - 1022-1352

VL - 213

SP - 2514

EP - 2528

JO - Macromolecular Chemistry and Physics

JF - Macromolecular Chemistry and Physics

IS - 23

ER -

Self-assembly of amphiphilic block copolymers in ternary solvent mixtures: Lyotropic liquid crystalline phase behavior and structure

Abstract

Keywords

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