In situ Rheo-GISANS of triblock copolymers: Gelation and shear effects on quasi-crystalline structures at interfaces

Gemma E. Newby; Erik B. Watkins; Daniel Hermida Merino; Paul A. Staniec; Oier Bikondoa

doi:10.1039/c5ra20215a

In situ Rheo-GISANS of triblock copolymers: Gelation and shear effects on quasi-crystalline structures at interfaces

Gemma E. Newby
, Erik B. Watkins
, Daniel Hermida Merino
, Paul A. Staniec
, Oier Bikondoa

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

6 Scopus citations

Abstract

The behaviour of polymeric systems at surfaces and under flow is extremely important in many applications, ranging from drug delivery to lubrication. We have studied a model triblock copolymer in deuterated water combining in situ rheology and grazing incidence small angle neutron scattering. Several thermotropic phases appear as a function of the temperature, including a bicontinuous phase not present in the bulk. Moreover, gelation can occur following a different route depending on the concentration. We show that shearing can be used to monitor the structural integrity of the micellar systems and in some cases as a tool for modifying the thermotropic phases: an fcc (face centred cubic) phase is sheared into a hcp (hexagonally close packed) phase, and is then recovered by cycling the temperature.

Original language	English
Pages (from-to)	104164-104171
Number of pages	8
Journal	RSC Advances
Volume	5
Issue number	126
DOIs	https://doi.org/10.1039/c5ra20215a
State	Published - Dec 1 2015
Externally published	Yes

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10.1039/c5ra20215a

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title = "In situ Rheo-GISANS of triblock copolymers: Gelation and shear effects on quasi-crystalline structures at interfaces",

abstract = "The behaviour of polymeric systems at surfaces and under flow is extremely important in many applications, ranging from drug delivery to lubrication. We have studied a model triblock copolymer in deuterated water combining in situ rheology and grazing incidence small angle neutron scattering. Several thermotropic phases appear as a function of the temperature, including a bicontinuous phase not present in the bulk. Moreover, gelation can occur following a different route depending on the concentration. We show that shearing can be used to monitor the structural integrity of the micellar systems and in some cases as a tool for modifying the thermotropic phases: an fcc (face centred cubic) phase is sheared into a hcp (hexagonally close packed) phase, and is then recovered by cycling the temperature.",

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T1 - In situ Rheo-GISANS of triblock copolymers

T2 - Gelation and shear effects on quasi-crystalline structures at interfaces

AU - Newby, Gemma E.

AU - Watkins, Erik B.

AU - Merino, Daniel Hermida

AU - Staniec, Paul A.

AU - Bikondoa, Oier

PY - 2015/12/1

Y1 - 2015/12/1

N2 - The behaviour of polymeric systems at surfaces and under flow is extremely important in many applications, ranging from drug delivery to lubrication. We have studied a model triblock copolymer in deuterated water combining in situ rheology and grazing incidence small angle neutron scattering. Several thermotropic phases appear as a function of the temperature, including a bicontinuous phase not present in the bulk. Moreover, gelation can occur following a different route depending on the concentration. We show that shearing can be used to monitor the structural integrity of the micellar systems and in some cases as a tool for modifying the thermotropic phases: an fcc (face centred cubic) phase is sheared into a hcp (hexagonally close packed) phase, and is then recovered by cycling the temperature.

AB - The behaviour of polymeric systems at surfaces and under flow is extremely important in many applications, ranging from drug delivery to lubrication. We have studied a model triblock copolymer in deuterated water combining in situ rheology and grazing incidence small angle neutron scattering. Several thermotropic phases appear as a function of the temperature, including a bicontinuous phase not present in the bulk. Moreover, gelation can occur following a different route depending on the concentration. We show that shearing can be used to monitor the structural integrity of the micellar systems and in some cases as a tool for modifying the thermotropic phases: an fcc (face centred cubic) phase is sheared into a hcp (hexagonally close packed) phase, and is then recovered by cycling the temperature.

UR - https://www.scopus.com/pages/publications/84951033522

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DO - 10.1039/c5ra20215a

M3 - Article

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SN - 2046-2069

VL - 5

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EP - 104171

JO - RSC Advances

JF - RSC Advances

IS - 126

ER -

In situ Rheo-GISANS of triblock copolymers: Gelation and shear effects on quasi-crystalline structures at interfaces

Abstract

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