不同比例碳纳米管/石墨烯杂化材料的制备及性能

The preparation and performance of MWCNTs/GnPs-OH hybrid materials with different proportion MWCNTs to GnPs-OH

碳纳米管和酸化石墨烯可以通过聚丙烯酰氯的桥梁作用紧密地连接在一起,形成稳定的碳纳米管/石墨烯杂化材料。将合成杂化材料所需的碳纳米管和石墨烯的比例分别调整为1∶2和2∶1与聚丙烯酰氯进行反应。用红外光谱(FT-IR)、透射电镜(TEM)和拉曼光谱(Raman)对反应产物碳纳米管/石墨烯杂化材料进行表征。将合成的不同种类杂化材料添加到环氧树脂中制备复合材料,研究不同种类的杂化材料对环氧树脂的增强增韧效果。拉伸测试结果表明,碳纳米管和石墨烯的比例为1∶2时,合成的碳纳米管/石墨烯杂化材料对环氧树脂基的增强增韧效果最佳。这是由于当碳纳米管与石墨烯的比例为1∶2时,碳纳米管可以更均匀地分散在石墨烯的片层中,形成稳定的三维结构,当复合材料承受外力时不会产生局部应变,从而达到增强增韧效果。

The MWCNTs/GnPs-OH hybrid materials with stable structure were prepared by linking MWCNTs and GnPs-OH closely via the bridge poly（acryloyl chloride）.The proportion of MWCNTs and GnPs-OH was adjusted from 1∶1to 1∶2and 2∶1respectively to react with poly（acryloyl chloride）.The FT-IR,TEM and Raman were used to characterize the successful preparation of hybrid materials.The epoxy resin composites were made by adding different hybrid materials into epoxy resin to study the strengthening and toughening effect of hybrid materials.The tensile tested showed that the 1∶2hybrid material（MWCNTs∶GnPs-OH=1∶2）owned the best strengthening and toughening effect on epoxy resin.The reason may be attributed to the less MWCNTs-OH can disperse homogeneously into the more GnPs-OH sheets to form stable three-dimensional structure.So the strengthening and toughening effect would be achieved by avoiding local strain when undertake external load.