以聚乙二醇(PEG)为基膜材料,将石墨烯纳米片(GNS)填充至PEG中制备了GNS/PEG杂化膜。通过扫描电镜(SEM)、红外光谱(FT-IR)、溶胀度测试(Sw)和热重分析(TG)等手段对膜材料及杂化膜的形貌、表面化学性质、耐溶胀性以及热性能进行了表征。将其应用于渗透汽化噻吩/正庚烷混合物体系的分离,结果表明:当GNS填充量由0.2%上升至1%,富硫因子呈增大趋势,渗透通量呈先下降后增加趋势,这可能是随着GNS填充量的变化,GNS提供的层间小分子传质通道、界面结构、PEG自由体积及分子间作用力均有不同程度的变化。随着操作温度的升高,渗透通量升高,富硫因子先降低后升高。当GNS填充量为1%时,渗透通量为166.34g/(m²·h),富硫因子为19.77,比纯PEG膜分别提高了61.29%和26.35%。

Graphene nano-sheets/polyethylene glycol (GNS/PEG) hybrid membranes were prepared by physical filling of GNS into PEG matrix.The morphology,surface chemical properties,swelling resistance and thermal properties was characterized by SEM,FT-IR,swelling measurement and TGA.GNS/PEG were applied for pervaporation desulfurization of thiophene/n-hexane mixtures.It was found that sulfur enrichment factor increased,with permeation flux decreasing first and increasing thereafter,as GNS loading increased from 0.2% to 1%.This was mainly ascribed to the variation of interlayer mass transfer channels,interface structure,free volume of PEG and intermolecular force due to the increasing of GNS loading.As operation temperature increased,the permeation flux increased,with sulfur enrichment factor decreased first and increased thereafter.As GNS loading was 1%,the permeation flux and enrichment factor were 166.34g/(m²·h) and 19.77,which was 61.29% and 26.35% higher than that of pure PEG membrane,respectively.