氧化石墨烯纳米带与氧化石墨烯增强热塑性聚氨酯薄膜的制备及性能

Preparation and Properties of Graphene Oxide Nanoribbons and Graphene Oxide Reinforced Thermoplastic Polyurethane Films

利用纵向裂解多壁碳纳米管制备了氧化石墨烯纳米带,并采用溶液成型的方法制得氧化石墨烯纳米带-氧化石墨烯(GONRs-GO)/热塑性聚氨酯(TPU)复合材料薄膜。场发射扫描电镜和X射线衍射分析结果显示,GONRs与GO间相互剥离并均匀地分散在TPU基体中;氧气透过率(OTR)和力学性能测试表明,GONRs和GO具有协同增强TPU复合材料薄膜的阻隔和力学性能的作用。当GONRs和GO在TPU中添加量均为1.5%(质量分数)时,GONRs-GO/TPU复合材料薄膜的阻隔和力学性能达到最佳。相比于纯TPU薄膜,该GONRs-GO/TPU复合材料薄膜的OTR降低了83.94%,拉伸断裂强度、屈服强度、扯断伸长率则分别提高了59.28%,59.54%和15.0%。

The graphene oxide nanoribbons were prepared by longitudinally unzipping the multiwalled carbon nanotubes,and then thermoplastic polyurethane( TPU) composite films containing graphene oxide nanoribbons( GONRs)and graphene oxide( GO) were fabricated by the solution casting method. The results of FE-SEM and XRD indicate that GONRs-GO in TPU matrix are fully exfoliated and uniformly dispersed in the TPU matrix; Oxygen transmission rate( OTR) and mechanical testing indicate that GONRs and GO exhibit a synergistic effect on improving the barrier and mechanical properties of TPU composite films. Adding with 1. 5% GONRs and 1. 5% GO into the TPU matrix at the same time,the barrier properties and mechanical properties of GONRs-GO/TPU composite films can gain the best results.Moreover,compared with the pure TPU film,the OTR of GONRs-GO/TPU composite films declines by about 83. 94%,and the tensile strength,the yield strength and the elongation at break are increased by 59. 28%,59. 54% and 15. 0%respectively.