| 초록 |
Graphene has recently been studied by researchers for incorporation into moisture barrier composite film due to its high aspect ratio and the unique molecular impenetrability. Here, we demonstrate the enhanced barrier property of graphene-polyethylene composite by incorporating few-layered graphene flakes (GFs) produced through solvothermal method. An organic molecule, quinoline, was intercalated into the graphite during the solvothermal process, which yielded a graphite compound with expanded layer spacing. The compound was then exfoliated to form GFs with extremely low oxygen contents (~3.17 %) and large lateral size ranging up to 10 ㎛. Moreover, the produced GFs were non-covalently functionalized with quinoline during the process, which allowed re-dispersion in various organic solvents. The re-dispersed GFs were incorporated into polyethylene matrix via solution mixing method, resulting in a graphene-polyethylene composite with moisture barrier properties with 50 % of improvement. |
