CO-PA/SEG复合材料的热稳定性和力学性能研究  

Study on Thermal Stability and Mechanical Properties of CO-PA/SEG Composites

作　　者：刘欣[1] 王乐英[1] 管永[1] 赵丽芬[1] 何海峰[1] 万振高 

机构地区：[1]山东科技大学材料科学与工程学院,山东青岛266590

出　　处：《塑料科技》2016年第4期36-42,共7页Plastics Science and Technology

摘　　要：采用剪切剥离法制备了无片层缺陷石墨烯(SEG),并以之为填料,通过简单的溶液共混法制备了共聚聚酰胺(CO-PA)/SEG纳米复合材料。原子力显微镜(AFM)和扫描电镜(SEM)测试结果显示,所制备的SEG是多片层石墨烯而非单片层石墨烯。X射线衍射(XRD)和偏光显微镜(POM)测试结果表明,SEG的引入能改变CO-PA的结晶性能,并使其晶型发生转变。热重分析(TG)与力学性能测试结果表明,当SEG含量较低时,CO-PA/SEG纳米复合材料具有较好的热稳定性和力学性能,明显优于纯CO-PA。这皆归因于无缺陷石墨烯SEG不但具有良好的热学和力学性能,而且能在CO-PA中得到良好的剥离和分散。The shear exfoliation graphene（SEG） with no basal-plane defects was fabricated by shear exfoliation in aqueous phase. With the SEG as filler, the co-polyamide（CO-PA）/SEG nanocomposites were prepared via a simple solution mixing method. The atomic force microscope（AFM） and scanning electron microscopy（SEM） test results reveal that, the SEG is few-layer graphene rather than solely monolayer graphene. The X-ray diffraction（XRD） and polarizing microscope（POM） test results indicate that, the introduction of SEG can change the crystallization behavior of CO-PA and contributes to the crystal form transformation. The thermogravimetric analysis（TG） and mechanical properties test results show that, the COPA/SEG nanocomposites at a low SEG loading have better thermal stability and mechanical properties than that of neat CO-PA. All these enhancements of the nanocomposites are ascribed to the superior thermal and mechanical properties of SEG, and its well exfoliation and dispersion in CO-PA matrix.

关 键 词：剪切剥离石墨烯 共聚聚酰胺 溶液共混 热稳定性 力学性能 

分 类 号：TQ323.6[化学工程—合成树脂塑料工业]