Effect of ceramic nanoadditive content and type on the rheological properties of poly(vinyl alcohol) spinning solutions

Abstract

Rheological properties of aqueous PVA solutions within a wide concentration range have been examined to select a concentration at which apparent dynamic viscosity is suitable for fiber spinning from solution by the wet process. The rheological properties of PVA solutions containing various quantities of nanosilica and nanohydroxyapatite were assessed. It has been found that an increase in the quantity of both types of nanoadditives from 1 to 5% brings about a decrease in the value of the rheological parameter n and enhances the polymeric character of the fluid.

Nanocomposite polyvinyl alcohol fibers for medical applications

“…Differences in the values of the rheological parameters n and k of solutions containing 1–3% of HAp and SiO 2 nanoadditive result from mutual interactions between the polymer macromolecules, solvent molecules, and the nanoadditive. A detailed analysis of the influence of these nanoadditives on the mechanism of dilution by shearing was presented in our earlier publication 11. However, this concerned a polymer of lower molecular mass, and the tested solutions did not contain urea.…”