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Effects of Volume Fraction and Composition on the Rheological Properties of Polyacrylic Acid/Polyacrylamide Hydrogels

Published online by Cambridge University Press:  26 February 2011

Bryan Baker ,
Rebecca Murff  and
Valeria T. Milam
Bryan Baker
Affiliation:
bryan.baker@mse.gatech.edu, Georgia Institute of Technology, School of Materials Science and Engineering, 771 Ferst Drive, Atlanta, GA, 30332, United States
Rebecca Murff
Affiliation:
gtg333y@mail.gatech.edu, Georgia Institute of Technology, Department of Biomedical Engineering, Atlanta, GA, 30332, United States
Valeria T. Milam
Affiliation:
valeria.milam@mse.gatech.edu, Georgia Institute of Technology, School of Materials Science and Engineering, 771 Ferst Drive, Atlanta, GA, 30332, United States
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Abstract

Polyacrylamide-based hydrogels are popular materials that have been extensively studied for their applications in the field of biomaterials due to their permeability and biological compatibility. A major limitation of this polymeric material, however, in biological applications stems from their limited mechanical stiffness. The current study examines the mechanical properties of polyacrylamide-polyacrylic acid-based hydrogels at varying volume fractions and compositions using oscillatory rheology. For a fixed chemical cross-linker concentration, an increase in the volume fraction of hydrogel resulted in an increase in the shear elastic modulus of the hydrogel. Additionally, varying the relative ratio of polyacrylamide to polyacrylic acid resulted in modest changes in the shear elastic modulus.

Keywords

polymerelastic propertiesviscoelasticity
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 975: Symposium DD – Mechanics of Biological and Bio-Inspired Materials , 2006 , 0975-DD06-06
Copyright
Copyright © Materials Research Society 2007

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References

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