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Solvent‐Free Aqueous Dispersions of Block Copolyesters for Electrospinning of Biodegradable Nonwoven Mats for Biomedical Applications
Author(s) -
Bubel Kathrin,
Grunenberg Daniel,
Vasilyev Gleb,
Zussman Eyal,
Agarwal Seema,
Greiner Andreas
Publication year - 2014
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.201400116
Subject(s) - electrospinning , materials science , rheology , aqueous solution , ethylene glycol , ethylene oxide , chemical engineering , nanofiber , dispersion (optics) , viscosity , solvent , polymer chemistry , copolymer , composite material , polymer , organic chemistry , chemistry , physics , optics , engineering
Biodegradable block copolyesters are processed from water to water‐stable electrospun fibers without use of any organic solvent, which is of major importance for a variety of applications. The copolyesters (poly(ϵ‐caprolactone‐ b ‐methoxypolyethylene glycol)) (PCL‐ b ‐MPEG)) are emulsified in water at 90 °C in presence of poly(ethylene oxide) (PEO) using melt dispersion method. Dramatic increase in viscosity is observed upon addition of PEO to aqueous dispersions of copolyesters. Evidence of structure formation in aqueous PCL‐ b ‐MPEG/PEO dispersions is adduced using rheological studies. PCL block length dependent water stable nanofiber non‐wovens are obtained upon electrospinning of the dispersions.