Cho, Jaehyun Jeon, Ikseong Kim, Seong Yun Lim, Soonho Jho, Jae Young 2024-01-20T01:00:23Z 2024-01-20T01:00:23Z 2021-09-04 2017-08-23 1944-8244 https://pubs.kist.re.kr/handle/201004/122401 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 y 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. English American Chemical Society GRAPHENE OXIDE SHEETS NANOCOMPOSITES EXFOLIATION INTERFACE MECHANISM STRENGTH Improving Dispersion and Barrier Properties of Polyketone/Graphene Nanoplatelet Composites via Noncovalent Functionalization Using Aminopyrene Article 10.1021/acsami.7b10474 1 ACS Applied Materials & Interfaces, v.9, no.33, pp.27984 - 27994 ACS Applied Materials & Interfaces 9 33 27984 27994 scie scopus 000408518800071 2-s2.0-85028030775 Nanoscience & Nanotechnology Materials Science, Multidisciplinary Science & Technology - Other Topics Materials Science Article GRAPHENE OXIDE SHEETS NANOCOMPOSITES EXFOLIATION INTERFACE MECHANISM STRENGTH graphene nanocomposite noncovalent functionalization dispersion interfacial interaction mechanical property barrier property 3D micro-CT