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nanocomposites enhanced greatly with the addition of CNFs, and the
CNFs content at maximum tensile strength was only 2 wt% regardless
of the preparation methods. These results are due to the physical
interaction between the PBS matrix and reinforced-CNFs with high
mechanical property, and more uniform dispersion at the 2 wt%
loading of CNFs. However, the tensile strength of nanocomposites
slightly started to decrease after 2 wt%, which attributed to the
aggregation of CNFs in the PBS matrix. It was also found that
nanocomposites prepared by the SOAM method showed relatively
higher tensile strength than those of the other preparation methods.
As the CNFs content increased, the slight decrease in the elongation
at break was observed as indicated in Figure 2(b). This variation was
resulted in part from the modifications in crystalline fraction of the PBS
matrix as more CNFs added. It thus is believed that the CNFs led to a
decrease in ductility and an increase in brittleness.5 In addition, we
can found that the decrease in the elongation at break was less in
nanocomposite obtained from the SOAM method than in those of two
other preparation methods.
The relative state of dispersion of CNFs inside the PBS matrix was
compared by scanning electron microscopy (SEM) as presented in
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