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Updated: Jun 28, 2026

Injectable Supramolecular Polymer-Nanoparticle Hydrogels for Cell and Drug Delivery Applications

Injectable Supramolecular Polymer-Nanoparticle Hydrogels for Cell and Drug Delivery Applications

Published on: February 7, 2021

Nanoparticle-reinforced associative network hydrogels.

Sarvesh K Agrawal¹, Naomi Sanabria-Delong, Gregory N Tew

¹Department of Chemical Engineering, University of Massachusetts, Amherst, MA 01003, USA.

Langmuir : the ACS Journal of Surfaces and Colloids

|October 25, 2008

Summary

This summary is machine-generated.

Adding laponite nanoparticles to poly(lactide)-poly(ethylene oxide)-poly(lactide) (PLA-PEO-PLA) gels enhances their elastic modulus. This modification increases intermicellar attraction and micellar aggregation, improving gel properties.

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Area of Science:

Polymer Science
Materials Science
Nanotechnology

Background:

ABA triblock copolymers form associative micellar gels in selective solvents.
Poly(lactide)-poly(ethylene oxide)-poly(lactide) (PLA-PEO-PLA) is a type of ABA triblock copolymer.
Laponite is a synthetic clay nanoparticle.

Purpose of the Study:

To investigate the effect of laponite nanoparticles on the structure and rheology of PLA-PEO-PLA micellar gels.
To understand how nanoparticles modify the gel network and enhance mechanical properties.

Main Methods:

Preparation of PLA-PEO-PLA gels with varying laponite concentrations.
Rheological measurements to assess gel elasticity (elastic modulus).
Small-angle X-ray scattering (SAXS) and dynamic light scattering (DLS) for structural characterization.

Main Results:

Addition of laponite significantly enhanced the elastic modulus of PLA-PEO-PLA gels.
Nanoparticles create additional junction points through adsorption of PEO chains onto laponite surfaces.
SAXS and DLS confirmed increased intermicellar attraction and micellar aggregation.

Conclusions:

Laponite nanoparticles effectively reinforce PLA-PEO-PLA micellar gels.
The enhanced mechanical properties are attributed to nanoparticle-induced changes in gel microstructure.
This strategy offers a method for tuning the properties of polymer gels for advanced applications.