1 research outputs found
Improving Dispersion and Barrier Properties of Polyketone/Graphene Nanoplatelet Composites via Noncovalent Functionalization Using Aminopyrene
A series of polyketone
(PK) nanocomposite films with varying content of noncovalently functionalized
graphene nanoplatelet with 1-aminopyrene (GNP/APy) is prepared by
solution blending with a solvent of hexafluoro-2-propanol. GNP/APy,
prepared by a facile method, can effectively induce specific interaction
such as hydrogen bonding between the amine functional group of GNP/APy
and the carbonyl functional group of the PK matrix. With comparison
of GNP and GNP/Py as reference materials, intensive investigation
on filler–matrix interaction is achieved. In addition, the
dispersion state of the functionalized GNP (f-GNPs; GNP/Py and GNP/APy)
in the PK matrix is analyzed by three-dimensional nondestructive X-ray
microcomputed tomography, and the increased dispersion state of those
fillers results in significant improvement in the water vapor transmission
rate (WVTR). The enhancement in WVTR of the PK/GNP/APy nanocomposite
film at 1 wt % loading of filler leads to a barrier performance approximately
2 times larger compared to that of PK/GNP nanocomposite film and an
approximately 92% reduction in WVTR compared to the case of pristine
PK film. We expect that this facile method of graphene functionalization
to enhance graphene dispersibility as well as interfacial interaction
with the polymer matrix will be widely utilized to expand the potential
of graphene materials to barrier film applications