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Electrospinning of poly(ε‐caprolactone) solutions containing graphene oxide: Effects of graphene oxide content and oxidation level
Author(s) -
Ramazani Soghra,
Karimi Mohammad
Publication year - 2016
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.23163
Subject(s) - materials science , graphene , oxide , electrospinning , composite material , scanning electron microscope , fiber , contact angle , conductivity , nanofiber , caprolactone , graphite , chemical engineering , copolymer , polymer , nanotechnology , chemistry , engineering , metallurgy
The morphological appearance, fiber diameter, and structure of poly(ε‐caprolactone) (PCL) nanofibers produced by the electrospinning process were studied in the presence of different amounts of graphene oxide (GO) with different oxidation levels. Scanning electron microscope micrographs of electrospun fibers showed that the average fiber diameter decreases in the presence of GO with different loading and oxidation levels. The loading level of GO especially higher than 0.3 wt% was influential in decreasing the diameter of PCL electrospun fibers rather than oxidation level. Contact angle, infrared spectroscopy, and conductivity measurements on graphite oxide (GtO) samples, as well as rheological, conductivity, and surface tension experiments on PCLGO solutions were performed to describe the role of GO in the significant reduction of fiber diameter. It was found that three factors are involved in generating a driving force for more stretching of the electrospinning jet. One is the viscosity reduction of PCLGO solution, which intensifies by more GO content and less GO oxidation level. The second is solution conductivity which enhances by GO loading and the third is the charge relaxation time of the spinning solution, which grows with increasing the oxidation level of GO as well as the GO content. POLYM. COMPOS., 131–140, 2016. © 2014 Society of Plastics Engineers