氧化石墨烯/三元共聚尼龙纳米复合材料的制备与性能  

Preparation and Properties of Graphene Oxide/Nylon Nanocomposites

作　　者：刘欣[1] 管永[1] 邵晓瑜 赵丽芬[1] 何海峰[1] 

机构地区：[1]山东科技大学材料科学与工程学院青岛市海洋耐磨蚀材料重点实验室,山东青岛266590

出　　处：《高分子材料科学与工程》2015年第10期165-169,174,共6页Polymer Materials Science & Engineering

摘　　要：采用改进的Hummers法,以天然石墨为原料制备了氧化石墨烯。通过溶液预共混法制备了氧化石墨烯(GO)/三元共聚尼龙(CO-PA)复合材料。通过X射线衍射图谱对复合材料衍射峰的分析及扫描电镜对复合材料的断面微观形态分析未发现堆积的氧化石墨烯,表明氧化石墨烯在三元共聚尼龙中得到较好的分散。力学性能分析,GO质量分数为0.6%时,复合材料的拉伸强度达到最大,相比于纯的三元共聚尼龙提高了17.21%;断裂伸长率随着GO含量的增加而降低。气体透过率测试表明氧化石墨能明显增加复合材料气体阻隔性。差示扫描量热和热重分析表明复合材料的结晶度和结晶温度随着GO含量的增加而上升,复合材料的热稳定性也随之提高。Graphene oxide（GO）was prepared by improved Hummers method with natural graphite as raw material.To improve the properties of copolymerization nylon（CO-PA）,a series of nanocomposites based on CO-PA and grapheme oxide were prepared via melt-blending before the pre-mixing process.X-ray diffraction and scanning electron microscope exhibit an exfoliated structure of GO in polymer,and reveal excellent dispersion of GO in polymer matrix.The mechanical properties analysis shows that the tensile strength of the nanocomposites is the maximum and improved by 17.21%in comparison with pure CO-PA matrix at the GO concentration only 0.6%;and the elongation at break of the nanocomposites reduces with increasing GO content.The water vapor permeability of GO/CO-PA nanocomposites is improved significantly by the incorporation of GO into the CO-PA matrix.DSC and TG tests indicate that crystallinity and crystallization temperature of the nanocomposites increase with increasing GO content and the thermal stability is also improved.

关 键 词：氧化石墨烯 尼龙 纳米复合材料 力学性能 

分 类 号：TQ323.6[化学工程—合成树脂塑料工业]