为了提高热塑性聚氨酯(TPU)的阻隔性能,首先,采用溶液成型的方法在涂膜机上制备了功能氧化石墨烯(IP-GO)/TPU复合材料薄膜.然后,利用FTIR、XPS、XRD、FE-SEM、原子力显微镜和氧气透过仪对IP-GO/TPU复合材料的形貌和性能进行了表征.结果表明:IP-GO层间距相对原始鳞片石墨的增加了0.696 nm,片层的厚度为1.2 nm左右.IP-GO以褶皱层状的形式均匀分散在TPU基体中,并且包覆在复合材料薄膜断口表面.当IP-GO含量为3wt％时,IP-GO/TPU复合材料薄膜的氧气透过率为84.325 cm3/(m2·d·Pa),相比纯TPU薄膜的280.973 cm3/(m2·d·Pa)下降了70％,阻隔性能明显提高.研究解决了TPU薄膜阻隔性能不佳的问题,为高阻隔聚合物的制备提供了一种思路和方法.
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