Mechanical properties of chitosan films: Effect of solvent acid

Authors

  • Carlos A. Kienzle-Sterzer,

    1. Biomaterials Sciences and Engineering Laboratory, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
    Search for more papers by this author
  • Dolores Rodriguez-Sanchez,

    1. Biomaterials Sciences and Engineering Laboratory, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
    Search for more papers by this author
  • ChoKyun Rha

    Corresponding author
    1. Biomaterials Sciences and Engineering Laboratory, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
    • Biomaterials Sciences and Engineering Laboratory, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
    Search for more papers by this author

Abstract

The apparent Young's modulus shows a linear relationship with junction density of chitosan films. The linear relationship of apparent Young's modulus with chitosan concentration is also observed. The linear relationship depends of the acid used in the casting solution. Relaxation times were of the order of 104 seconds, indicating a slow physical process. Stress-relaxation behavior of swollen chitosan films, prepared by solvent casting from dilute acetic or propionic acid solutions, can be represented by a one-component Maxwell model.

Ancillary