Nanoparticle-Reinforced Associative Network Hydrogels

Agrawal, Sarvesh K. and Sanabria-DeLong, Naomi and Tew, Gregory N. and Bhatia, Surita R.. (2008) Nanoparticle-Reinforced Associative Network Hydrogels. Langmuir, 24 (22). pp. 13148-13154. ISSN 0743-7463

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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.

Item Type: Article
Additional Information: Reprinted with permission from "Nanoparticle-Reinforced Associative Network Hydrogels", S.K. Agrawal et al. Copyright 2008 American Chemical Society.
InterNano Taxonomy: Nanoscale Objects and Nanostructured Materials > Nanostructured Materials > Block copolymers
Nanomanufacturing Processes > Deposition of Nanostructured Films or Nanostructures > Adsorption
Nanoscale Objects and Nanostructured Materials
Nanomanufacturing Characterization Techniques > Diffraction and Scattering > Neutron diffraction
Nanomanufacturing Characterization Techniques > Diffraction and Scattering > Small angle x-ray scattering (SAXS)
Collections: Nanomanufacturing Research Collection > Nanomanufacturing Nanoscale Science and Engineering Centers > Center for Hierarchical Manufacturing
Nanomanufacturing Research Collection
Depositing User: Moureen Kemei
Date Deposited: 08 Feb 2010 22:59
Last Modified: 19 Sep 2011 21:22

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