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Mechanically Reinforcing Polyacrylate/Polyacrylamide Hydrogels through the Addition of Colloidal Particles

Published online by Cambridge University Press:  31 January 2011

Bryan A Baker ,
Rebecca Murff  and
Valeria T Milam
Bryan A Baker
Affiliation:
bryan.baker@mse.gatech.edu, Georgia Institute of Technology, School of Materials Science and Engineering, 771 Ferst Drive, Atlanta, Georgia, 30332, United States
Rebecca Murff
Affiliation:
Rebecca.Murff@gatech.edu, Georgia Institute of Technology, Wallace H. Coulter Department of Biomedical Engineering, Atlanta, Georgia, United States
Valeria T Milam
Affiliation:
valeria.milam@mse.gatech.edu, Georgia Institute of Technology, School of Materials Science and Technology, Atlanta, Georgia, United States
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Abstract

Polyacrylamide is a popular material for many bio-related applications ranging from electrophoretic separation to cellular supports. A limitation of polyacrylamide-based hydrogels, however, is their mechanical compliance. The current study examines the effect of colloidal particles as a reinforcing filler phase to enhance the mechanical stiffness of polyacrylamide-polyacrylate hydrogels. Measurements with oscillatory rheology show that for a fixed polymer volume fraction, the presence of colloidal particles with various surface modifications generally results in an increase of the shear storage modulus of the hydrogel-particle composite. Interestingly, this study indicated that no discernable trends can be linked between the values of the shear storage modulus and the particle surface characteristics.

Keywords

colloidcompositepolymer
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1190: Symposium NN – Active Polymers , 2009 , 1190-NN03-07
Copyright
Copyright © Materials Research Society 2009

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