通过注塑成型制备了均匀分散的十二烷基胺功能化氧化石墨烯（DA‐GO ）／高密度聚乙烯（HDPE）纳米复合薄膜。X 射线衍射（XRD ）研究表明，室温条件下DA 分子可与环氧基团发生亲核取代而接枝于GO表面。复合材料断口扫描显示，DA‐GO以剥离的形式均匀分散于 HDPE基体中。均匀分散的DA‐GO片层能有效提高HDPE复合膜的气体阻隔性能，当DA‐GO含量为05．％（质量分数）时，复合薄膜的透氧系数从纯 HDPE 的4．555×10－14 cm3 cm／（cm2· s · Pa）降低到18．30×10－14 cm3 cm／（cm2· s · Pa），阻氧性能提高了60％。此外，DA‐GO 片层的加入使HDPE的热稳定性明显提高。
The dodecyl amine (DA) functionalized graphene oxide (DA‐GO)/high‐density polyethylene (HDPE) membranes were prepared by injection molding method .X‐ray diffraction (XRD) showed that the DA could be successfully grafted onto the graphene oxide surface with uncleophilic substitution and amidation reaction .Mor‐phological analysis of nanocomposites showed that DA‐GO was homogeneously dispersed and fully exfoliated in the HDPE matrix ,which significantly improved the gas barring performance of HDPE .With 0 .5wt% RGO loading ,the permeability coefficient of O2 of DA‐GO/HDPE nanocomposite membranes decreased by 60% from 4 5.55 × 10-14 cm3cm/(cm2 · s · Pa) to 1 8.30 × 10-14 cm3cm/(cm2 · s · Pa) .Meanwhile ,the thermal stability of HDPE was also dramatically improved as a result of DA‐GO sheets .
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