Premium
Electrospinning and Mechanotropic Phenomena in Polymer Solutions
Author(s) -
Kotomin Sergey,
Malkin Alexander,
Skvortsov Ivan
Publication year - 2020
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.201900091
Subject(s) - electrospinning , dimethylacetamide , polymer , spinning , materials science , microfiber , solvent , chemical engineering , evaporation , fiber , polymer chemistry , polymer solution , boiling , composite material , chemistry , organic chemistry , thermodynamics , physics , engineering
The mechanism of electrospinning traditionally is related to fast evaporation of solvent from thin liquid jets of polymer solution observed in high‐voltage electric fields. Another mechanism, called mechanotropic spinning, is more reasonable for polymer solutions in solvents having low vapor pressure and high boiling temperature, that is, dimethylacetamide (DMAc), DMF, dimethyl sulfoxide (DMSO). Under elongation, the solution undergoes phase separation as a result of high‐speed stretching and the solvent reveals on the surface of the fiber without its complete evaporation. Microfibers obtained by mechanotropic spinning as well as by electrospinning of PAN solutions in DMSO and polyamidbenzamidazol in DMAc have stable droplets of the solvent on the fiber surface.