Tenside-Free Biodegradable Polymer Nanofiber Nonwovens by "Green Electrospinning"

Titelangaben

Bubel, Kathrin ; Zhang, Yi ; Assem, Yasser ; Agarwal, Seema ; Greiner, Andreas:
Tenside-Free Biodegradable Polymer Nanofiber Nonwovens by "Green Electrospinning".
In: Macromolecules. Bd. 46 (2013) Heft 17 . - S. 7034-7042.
ISSN 1520-5835
DOI: https://doi.org/10.1021/ma401044s

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Abstract

This work highlights the formation and use of tenside-free biodegradable polyester dispersions in water for making water stable nanofibers in accordance with the method of "Green Electrospinning". The concept was to use the amphiphilic block copolyesters poly[(hexamethylene adipate)-block-(methoxypolyethylene glycol)] (PHA-b-MPEG) and poly[(epsilon-caprolactone)-block-(methoxypolyethylene glycol)] (PCL-b-MPEG) for making tenside-free water dispersions. Different copolymers with varied block lengths were synthesized and converted to high-concentration aqueous dispersions by the solvent displacement method followed by dialysis. The dispersions were electrospun with solid contents of up to 28 wt %. Via addition of small amounts of a high-molecular weight poly(ethylene oxide) as a template polymer, the dispersions were processed to nanofiber nonwovens by electrospinning. Water stable PHA-b-MPEG and PCL-b-MPEG nanofibers were obtained by aqueous extraction of the nanofibers.