Open AccessPolylactic acid/polyethylene glycol blend fibres prepared via melt electrospinning: effect of polyethylene glycol content
Author(s) -
Nazari Tayebe,
Garmabi Hamid
Publication year - 2014
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2013.0735
Subject(s) - polylactic acid , materials science , polyethylene glycol , differential scanning calorimetry , rheometry , crystallinity , peg ratio , electrospinning , composite material , rheology , chemical engineering , polymer , polymer chemistry , polymer blend , crystallization , copolymer , engineering , physics , finance , economics , thermodynamics
Polylactic acid (PLA) was blended with polyethylene glycol (PEG) and spun via a melt‐electrospinning system. The effect of PEG content on the PLA melt and the thermal behaviour of the blend was studied using dynamic rheometry and differential scanning calorimetry, respectively. By fitting a rheological model, parameters such as zero‐shear viscosity and the relaxation time of polymer chains were obtained. A substantial reduction of zero‐shear viscosity and relaxation time by increasing the PEG content from 0 to 30 wt% was observed. Crystallisation peaks shifted to lower temperatures and the crystallinity level increased in PLA/PEG blends against PEG concentration. The results revealed enhanced polymer chain mobility because of the plasticising effect of PEG. Continuous microfibres were obtained by electrospinning of PLA/PEG blends. While neat PLA was not spinnable at the spinning temperature of 200°C, PLA/PEG blends were easily spun and the lowest fibre diameters of 3–6 μm were achieved with 30% PEG loading, at an applied voltage of 70 kV.