Rheological Properties and Spinnability of Chitosan Concentrated Solutions

Rheological properties and spinnability of chitosan concentrated solutions in aq.organic acids were investigated. The result of the dynamic viscoelasticity of the concentrated solutions indicated the existence of molecular association in the solution. This association tended to be weaker in the solutions with a strong acid. When an ultrasonic apparatus was used to dissolve the chitosan in the aq.organic acids, the size of the associated structure seems to be smaller. The concentration of the chitosan and the kind of acids added in the solution affect the spinnability of the concentrated solutions.