Effect of temperature on shear-induced anisotropic structure in polymer clay hydrogels

Jun Li; Jun Jiang; Chunhua Li; Min Y. Lin; Steven A. Schwarz; Miriam H. Rafailovich; Jonathan Sokolov

doi:10.1002/marc.200600438

Effect of temperature on shear-induced anisotropic structure in polymer clay hydrogels

Jun Li
, Jun Jiang
, Chunhua Li
, Min Y. Lin
, Steven A. Schwarz
, Miriam H. Rafailovich
, Jonathan Sokolov

Materials Science and Engineering

Stony Brook University

City University of New York
Stony Brook University

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

10 Scopus citations

Abstract

Shear-induced orientation of nanoparticles in poly(ethylene oxide)/Laponite RD hydrogels has been investigated by small angle neutron scattering (SANS). As temperature is reduced, anisotropy develops at lower shear rates. The two-correlation length Debye-Anderson-Brumberger (DAB) model provides a good fit to the experimental data. The deduced short-range correlation length (≈5 nm) is observed to increase with shear. The long-range correlation length (≈50 nm) shows a strong directional dependence, and decreases when shear is applied. The relative contribution of long-range order to the SANS intensity is observed to increase with shear and decrease with temperature.

Original language	English
Pages (from-to)	1787-1791
Number of pages	5
Journal	Macromolecular Rapid Communications
Volume	27
Issue number	20
DOIs	https://doi.org/10.1002/marc.200600438
State	Published - Oct 24 2006

Keywords

Clay
Composite
Hydrogels
Neutron scattering
Orientation
Polyethylene

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10.1002/marc.200600438

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title = "Effect of temperature on shear-induced anisotropic structure in polymer clay hydrogels",

abstract = "Shear-induced orientation of nanoparticles in poly(ethylene oxide)/Laponite RD hydrogels has been investigated by small angle neutron scattering (SANS). As temperature is reduced, anisotropy develops at lower shear rates. The two-correlation length Debye-Anderson-Brumberger (DAB) model provides a good fit to the experimental data. The deduced short-range correlation length (≈5 nm) is observed to increase with shear. The long-range correlation length (≈50 nm) shows a strong directional dependence, and decreases when shear is applied. The relative contribution of long-range order to the SANS intensity is observed to increase with shear and decrease with temperature.",

keywords = "Clay, Composite, Hydrogels, Neutron scattering, Orientation, Polyethylene",

author = "Jun Li and Jun Jiang and Chunhua Li and Lin, \{Min Y.\} and Schwarz, \{Steven A.\} and Rafailovich, \{Miriam H.\} and Jonathan Sokolov",

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TY - JOUR

T1 - Effect of temperature on shear-induced anisotropic structure in polymer clay hydrogels

AU - Li, Jun

AU - Jiang, Jun

AU - Li, Chunhua

AU - Lin, Min Y.

AU - Schwarz, Steven A.

AU - Rafailovich, Miriam H.

AU - Sokolov, Jonathan

PY - 2006/10/24

Y1 - 2006/10/24

N2 - Shear-induced orientation of nanoparticles in poly(ethylene oxide)/Laponite RD hydrogels has been investigated by small angle neutron scattering (SANS). As temperature is reduced, anisotropy develops at lower shear rates. The two-correlation length Debye-Anderson-Brumberger (DAB) model provides a good fit to the experimental data. The deduced short-range correlation length (≈5 nm) is observed to increase with shear. The long-range correlation length (≈50 nm) shows a strong directional dependence, and decreases when shear is applied. The relative contribution of long-range order to the SANS intensity is observed to increase with shear and decrease with temperature.

AB - Shear-induced orientation of nanoparticles in poly(ethylene oxide)/Laponite RD hydrogels has been investigated by small angle neutron scattering (SANS). As temperature is reduced, anisotropy develops at lower shear rates. The two-correlation length Debye-Anderson-Brumberger (DAB) model provides a good fit to the experimental data. The deduced short-range correlation length (≈5 nm) is observed to increase with shear. The long-range correlation length (≈50 nm) shows a strong directional dependence, and decreases when shear is applied. The relative contribution of long-range order to the SANS intensity is observed to increase with shear and decrease with temperature.

KW - Clay

KW - Composite

KW - Hydrogels

KW - Neutron scattering

KW - Orientation

KW - Polyethylene

UR - https://www.scopus.com/pages/publications/33750714777

U2 - 10.1002/marc.200600438

DO - 10.1002/marc.200600438

M3 - Article

SN - 1022-1336

VL - 27

SP - 1787

EP - 1791

JO - Macromolecular Rapid Communications

JF - Macromolecular Rapid Communications

IS - 20

ER -

Effect of temperature on shear-induced anisotropic structure in polymer clay hydrogels

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Keywords

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