On the electrospinning of PVB solutions

0348878 - ÚH 2011 RIV CZ eng C - Conference Paper (international conference)
Švrčinová, Petra - Filip, Petr - Lubasová, D.
On the electrospinning of PVB solutions.
Conference Proceedings. Ostrava: TANGER, 2010, s. 352-356. ISBN 978-80-87294-19-2.
[NANOCON 2010. International Conference /2./. Olomouc (CZ), 12.10.2010-14.10.2010]
R&D Projects: GA AV ČR IAA200600703
Institutional research plan: CEZ:AV0Z20600510
Keywords : electrospinning * elongational viscosity * polyvinylbutyral (PVB)
Subject RIV: BK - Fluid Dynamics

Extension rheological characteristics belong to the principal description of polymer jet formation during a process of electrospinning. However, in spite of nearly absence of shear deformation of polymer solutions during the process of their spinnability, it seems that shear electrorheological characteristics can serve as an indicator of good or bad quality of an electrospun template. The experiments were carried out with four polyvinylbutyral (PVB) solutions in concentration of 10 wt%. Shear viscosities in absence (η0) and presence (η) of electric field were measured using a rotational rheometer equipped with an electrorheological cell. It was shown that the good solvents of PVB exhibit an almost constant curve of η/η0 vs. electric field strength, whereas the viscosity curves for the poor solvents exhibit enhancement. This enhancement corresponds to better quality of electrospun templates (obtained for polymer solutions of PVB with poor solvents).
Permanent Link: http://hdl.handle.net/11104/0189283