| 초록 |
The barrier properties of polymers can be improved by reducing diffusivity and solubility of gases using filler materials such as graphene oxides (GOs) or cellulose nanocrystals (CNCs). These well-dispersed filler materials in polymeric matrix enhance gas barrier properties of polymers, while not affecting its moisture barrier property. In this study, an hydrophobically functionalized graphene oxides (FGOs)/CNCs hybrid fillers were incorporated into PVA films with an enhanced moisture barrier property. The FGO was prepared by alkylation reactions of large lateral sized GO. The functional groups improved hydrophobicity of GO and the large lateral size of GO maximized the tortuous effect by increasing the diffusion path. In addition, CNCs helped improve the dispersibility of FGO in hydrophilic PVA matrix. As a result, the FGOs/CNCs hybrid fillers enhanced the moisture barrier property of PVA as well as its mechanical properties due to the synergistic effect of the hybrid fillers. |
