Nanoparticle-reinforced associative network hydrogels

Sarvesh K. Agrawal; Naomi Sanabria-DeLong; Gregory N. Tew; Surita R. Bhatia

doi:10.1021/la8015518

Nanoparticle-reinforced associative network hydrogels

Sarvesh K. Agrawal
, Naomi Sanabria-DeLong
, Gregory N. Tew
, Surita R. Bhatia

Chemistry

Department of Chemical Engineering
University of Massachusetts

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

54 Scopus citations

Abstract

ABA triblock copolymers in solvents selective for the midblock are known to form associative micellar gels. We have modified the structure and rheology of ABA triblock copolymer gels comprising poly(lactide)-poly(ethylene oxide)-poly(lactide) (PLA-PEO-PLA) through addition of a clay nanoparticle, laponite. Addition of laponite particles resulted in additional junction points in the gel via adsorption of the PEO corona chains onto the clay surfaces. Rheological measurements showed that this strategy led to a significant enhancement of the gel elastic modulus with small amounts of nanoparticles. Further characterization using small-angle X-ray scattering and dynamic light scattering confirmed that nanoparticles increase the intermicellar attraction and result in aggregation of PLA-PEO-PLA micelles.

Original language	English
Pages (from-to)	13148-13154
Number of pages	7
Journal	Langmuir
Volume	24
Issue number	22
DOIs	https://doi.org/10.1021/la8015518
State	Published - Nov 18 2008

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abstract = "ABA triblock copolymers in solvents selective for the midblock are known to form associative micellar gels. We have modified the structure and rheology of ABA triblock copolymer gels comprising poly(lactide)-poly(ethylene oxide)-poly(lactide) (PLA-PEO-PLA) through addition of a clay nanoparticle, laponite. Addition of laponite particles resulted in additional junction points in the gel via adsorption of the PEO corona chains onto the clay surfaces. Rheological measurements showed that this strategy led to a significant enhancement of the gel elastic modulus with small amounts of nanoparticles. Further characterization using small-angle X-ray scattering and dynamic light scattering confirmed that nanoparticles increase the intermicellar attraction and result in aggregation of PLA-PEO-PLA micelles.",

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year = "2008",

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AU - Agrawal, Sarvesh K.

AU - Sanabria-DeLong, Naomi

AU - Tew, Gregory N.

AU - Bhatia, Surita R.

PY - 2008/11/18

Y1 - 2008/11/18

N2 - ABA triblock copolymers in solvents selective for the midblock are known to form associative micellar gels. We have modified the structure and rheology of ABA triblock copolymer gels comprising poly(lactide)-poly(ethylene oxide)-poly(lactide) (PLA-PEO-PLA) through addition of a clay nanoparticle, laponite. Addition of laponite particles resulted in additional junction points in the gel via adsorption of the PEO corona chains onto the clay surfaces. Rheological measurements showed that this strategy led to a significant enhancement of the gel elastic modulus with small amounts of nanoparticles. Further characterization using small-angle X-ray scattering and dynamic light scattering confirmed that nanoparticles increase the intermicellar attraction and result in aggregation of PLA-PEO-PLA micelles.

AB - ABA triblock copolymers in solvents selective for the midblock are known to form associative micellar gels. We have modified the structure and rheology of ABA triblock copolymer gels comprising poly(lactide)-poly(ethylene oxide)-poly(lactide) (PLA-PEO-PLA) through addition of a clay nanoparticle, laponite. Addition of laponite particles resulted in additional junction points in the gel via adsorption of the PEO corona chains onto the clay surfaces. Rheological measurements showed that this strategy led to a significant enhancement of the gel elastic modulus with small amounts of nanoparticles. Further characterization using small-angle X-ray scattering and dynamic light scattering confirmed that nanoparticles increase the intermicellar attraction and result in aggregation of PLA-PEO-PLA micelles.

UR - https://www.scopus.com/pages/publications/57349120722

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DO - 10.1021/la8015518

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SN - 0743-7463

VL - 24

SP - 13148

EP - 13154

JO - Langmuir

JF - Langmuir

IS - 22

ER -

Nanoparticle-reinforced associative network hydrogels

Abstract

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