功能化MWCNTs网格/环氧树脂复合材料的制备及性能

采用正压过滤法制备了多壁碳纳米管（MWCNTs）网格（巴基纸），并采用真空辅助RTM工艺制备了MWCNTs网格/环氧树脂复合材料。通过SEM、FTIR、拉伸测试等对MWCNTs网格的微观形貌和性能进行了表征，并研究了MWCNTs网格/环氧复合材料的拉伸性。结果表明，所制备的功能化MWCNTs网格比较均匀，拉伸强度在22~32 MPa之间，拉伸模量约为1 GPa，相比未功能化处理的MWCNTs网格，强度最大提高了约167%。功能化MWCNTs网格/环氧树脂复合材料的拉伸强度和拉伸模量可达到152 MPa和6.48 GPa，相比空白环氧树脂提高了约1倍以上，拉伸试样断面SEM表明，环氧树脂对功能化MWCNTs网格的浸润效果良好，界面结合紧密，有效地提高了复合材料的力学性能。

Preparation and properties of functionalized MWCNTs webs/epoxy resin composites

The functionalized multi-walled carbon nanotubes (MWCNTs) webs (buckypaper) were prepared by using positive pressure filtering process, and the functionalized MWCNTs webs were impregnated with epoxy by vacuum assistant RTM process. The morphology and performance of the MWCNTs webs were examined with SEM, FTIR and tensile testing methods. The mechanical properties of the MWCNTs web/epoxy composites were also measured by using tensile test. The results show that the functionalized MWCNTs webs is homogeneous, tensile strength is between 22 and 32 MPa, tensile modulus is around 1 GPa. The tensile strength is improved by 167% compared with that of the un-functionalized MWCNTs web. The strength and modulus of the functionalized MWCNTs webs/epoxy composites can reach 152 MPa and 6.48 GPa, respectively, improved by 100% compared with that of the neat epoxy. The fractured surfaces of some typical specimens from SEM observation show that the webs are impregnated well with epoxy and the interfacial bonding between the MWCNTs webs and epoxy matrix are good, which leads to the improvement of the mechanical properties of the composites.