Advanced

Network formation of graphene oxide in poly(3-hydroxybutyrate) nanocomposites

Rodriguez Arza, Carlos LU ; Jannasch, Patric LU and Maurer, Frans LU (2014) In European Polymer Journal 59. p.262-269
Abstract
Network formation of graphene oxide (GO) nanoplatelets was held accountable for the modification of the rheological properties of nanocomposites based on poly(3-hydroxybutyrate) (PHB). The nanocomposites were prepared by a casting procedure from the green solvent γ-butyrolactone. The nature of the GO network and percolation limits were analyzed by making use of the molar mass reduction of PHB that takes place in the melt, as well as by studying the deformation dependence of the viscoelastic behavior of the nanocomposites. The percolation volume fraction for the formation of GO network was found to be below 0.07%, while a corresponding GO aspect ratio of 400 was determined. The equilibrium shear modulus (|G∗eq|) of the GO network and the... (More)
Network formation of graphene oxide (GO) nanoplatelets was held accountable for the modification of the rheological properties of nanocomposites based on poly(3-hydroxybutyrate) (PHB). The nanocomposites were prepared by a casting procedure from the green solvent γ-butyrolactone. The nature of the GO network and percolation limits were analyzed by making use of the molar mass reduction of PHB that takes place in the melt, as well as by studying the deformation dependence of the viscoelastic behavior of the nanocomposites. The percolation volume fraction for the formation of GO network was found to be below 0.07%, while a corresponding GO aspect ratio of 400 was determined. The equilibrium shear modulus (|G∗eq|) of the GO network and the critical strain γc of the nanocomposites could be described both by a power-law dependence on the volume fraction of GO nanoparticles. Further assessment of the structure formation of the GO nanoparticles was made in the solid state, wherein the shear modulus of GO was analyzed with the Halpin-Tsai model. The values thus determined suggested the existence of tiled nanoplatelets within the formed network structure in the nanocomposites. The thermal properties of the nanocomposites were examined by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The microstructure of the samples was also characterized using X-ray diffraction (XRD) measurements. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Graphene Oxide, Biopolymer, PHB, Network Formation., Melt Rheology, Shear Modulus GO
in
European Polymer Journal
volume
59
pages
262 - 269
publisher
Elsevier
external identifiers
  • wos:000343341100030
  • scopus:84906837812
ISSN
0014-3057
DOI
10.1016/j.eurpolymj.2014.07.035
language
English
LU publication?
yes
id
4cc1c780-226c-4c10-8f52-a8b68198c1ad (old id 3734594)
date added to LUP
2014-09-12 16:51:31
date last changed
2017-03-26 04:00:45
@article{4cc1c780-226c-4c10-8f52-a8b68198c1ad,
  abstract     = {Network formation of graphene oxide (GO) nanoplatelets was held accountable for the modification of the rheological properties of nanocomposites based on poly(3-hydroxybutyrate) (PHB). The nanocomposites were prepared by a casting procedure from the green solvent γ-butyrolactone. The nature of the GO network and percolation limits were analyzed by making use of the molar mass reduction of PHB that takes place in the melt, as well as by studying the deformation dependence of the viscoelastic behavior of the nanocomposites. The percolation volume fraction for the formation of GO network was found to be below 0.07%, while a corresponding GO aspect ratio of 400 was determined. The equilibrium shear modulus (|G∗eq|) of the GO network and the critical strain γc of the nanocomposites could be described both by a power-law dependence on the volume fraction of GO nanoparticles. Further assessment of the structure formation of the GO nanoparticles was made in the solid state, wherein the shear modulus of GO was analyzed with the Halpin-Tsai model. The values thus determined suggested the existence of tiled nanoplatelets within the formed network structure in the nanocomposites. The thermal properties of the nanocomposites were examined by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The microstructure of the samples was also characterized using X-ray diffraction (XRD) measurements.},
  author       = {Rodriguez Arza, Carlos and Jannasch, Patric and Maurer, Frans},
  issn         = {0014-3057},
  keyword      = {Graphene Oxide,Biopolymer,PHB,Network Formation.,Melt Rheology,Shear Modulus GO},
  language     = {eng},
  pages        = {262--269},
  publisher    = {Elsevier},
  series       = {European Polymer Journal},
  title        = {Network formation of graphene oxide in poly(3-hydroxybutyrate) nanocomposites},
  url          = {http://dx.doi.org/10.1016/j.eurpolymj.2014.07.035},
  volume       = {59},
  year         = {2014},
}