环氧改性氧化石墨烯/水性聚氨酯复合膜的制备及其增强作用

Preparation and Enhancement of Composite based on the Epoxy Modified Graphene Oxide/Waterborne Polyurethane

摘要:

采用环氧氯丙烷（EPI）对氧化石墨烯（GO）进行共价键改性制备环氧改性氧化石墨烯（EPGO），再将EPGO共混水性聚氨酯（WPU）制得含有不同EPGO质量分数（以水性聚氨酯有效含量计）EPGO/WPU复合膜，通过FT-IR、XRD、TEM表征了EPGO的结构和形态并测试了成膜拉伸性能、耐磨性能。实验结果表明：EPGO的添加可以明显提高水性聚氨酯膜的拉伸强度，当添加0.8wt%的EPGO时，复合膜的拉伸强度达到12.9MPa，较空白膜提高了67.5%，杨氏模量提高了39.2%，且复合膜的耐磨性显著提高，表明EPGO的添加对水性聚氨酯膜有一定的增强作用。

Abstract:

The epoxy modified grapheme oxide (EPGO) was synthesized via the epichlorohydrin (EPI) modified graphene oxide (GO). EPGO was characterized for its structure and morphology by FTIR, XRD and TEM.EPGO/WPU composites were prepared containing different mass fraction of EPGO (in the effective content of WPU), and the tensile and abrasion resistances of these films were tested. The results revealed that the addition of EPGO could increase WPU tensile strength obviously. When the addition amount of EPGO was 0.8wt%, composite materials tensile strength reached 12.9MPa. Compared with the blank film(without EPGO)，tensile strength improved 67.5%，Young modulus enhance 39.2%, and the abrasion resistance of the film is improved obviously. So the mechanical properties of EPGO/WPU composites were strongly enhanced that is associated with the addition of EPGO.