氨基化多壁碳纳米管的制备及其在复合材料中的应用  

Preparation of amine-modified multiwalled carbon nanotubes and their use in composites

作　　者：王国建[1,2] 祖梅[2] 邱军[1,2] 

机构地区：[1]先进土木工程材料教育部重点实验室(同济大学),上海200092 [2]同济大学材料科学与工程学院,上海200092

出　　处：《新型炭材料》2011年第2期89-97,共9页New Carbon Materials

基　　金：国家高技术研究发展计划(863计划)项目(2009AA03Z528)~~

摘　　要：采用不同链长的乙二胺(EDA)、己二胺(HMDA)和癸二胺(DMDA)对多壁碳纳米管(MW CNTs)进行了修饰。利用红外光谱、拉曼光谱、透射电镜及X射线光电子能谱对二元胺修饰的MW CNTs的化学结构进行了表征。结果表明:二元胺可以有效地修饰MW CNTs。经胺化修饰后,MW CNTs-EDA、MW CNTs-HMDA、MW CNTs-DMDA表面的N元素含量可分别达到3.52%、4.18%和2.88%,表明在相同的氨化条件下,己二胺的接枝率最高。进一步采用紫外-可见吸收光谱及全能稳定性分析仪对不同链长的二元胺修饰的氨基化MW CNTs在有机溶剂中的分散性进行了半定量的表征。结果显示:氨基化修饰有效改善了碳纳米管在极性溶剂中的分散稳定性,其中己二胺修饰的MW CNTs在乙醇中的分散稳定性最好。将MW CNTs-HMDA引入到传统的炭纤维/环氧树脂复合材料体系中,复合材料的冲击性能及弯曲性能均有较大提高。Multiwalled carbon nanotubes（MWCNTs） were modified by a graft reaction of diamines with different chain lengths,such as ethylenediamine（EDA）,hexamethylene diamine（HMDA） and decamethylene diamine（DMDA）.FTIR,Raman spectroscopy,XPS and TEM were used to characterize their chemical structure.XPS indicated that the molar content of N on the surface of MWCNTs-EDA,MWCNTs-HMDA and MWCNTs-DMDA reached 3.52%,4.18% and 2.88% respectively under the same reaction conditions.The dispersion of MWCNTs in organic solvents before and after the modification was measured semi-quantitatively using UV-Vis spectra and a Turbiscan analyzer.It was found that the amino-modified MWCNTs improved their dispersion in polar solvents and MWCNTs-HMDA had the best dispersion stability.MWCNTs-HMDA were introduced into a traditional carbon fiber reinforced epoxy system to prepare three phase composites which showed remarkably improved flexural and impact strengths.

关 键 词：碳纳米管 二元胺 化学修饰 分散稳定性 复合材料 

分 类 号：TB383.1[一般工业技术—材料科学与工程]