磁性功能化碳纳米管的制备及序列化碳纳米管材料的力学性能研究

Preparation of Functionalized Magnetic Carbon Nanotubes and Research on Mechanical Properties of Construct Ordered Carbon Nanotubes Materials

对碳纳米管(MWNTs)进行化学镀镍处理制备镀镍碳纳米管(Ni/MWNTs),在500±0.5℃条件下对Ni/MWNTs进行热处理;采用磁诱导/冰模板定型复合方式将热处理Ni/MWNTs添加到壳聚糖溶液中,冷冻干燥形成MWNTs有序排列的镀镍碳纳米管-壳聚糖(Ni/MWNTs-CHI)多孔结构;将多孔结构浸入环氧树脂-固化剂-丙酮系统混合液,真空干燥处理10 h制得序列化镀镍碳纳米管-环氧树脂(Ni/MWNTs-EP)复合材料。利用分析型扫描电镜、振动样品磁强计对Ni/MWNTs进行表征。利用SEM观察了序列化Ni/MWNTs-CHI多孔显微结构。采用微机控制电子万能试验机测试了复合材料力学性能。结果表明:热处理工艺能够均匀化所镀镍层,使热处理后Ni/MWNTs饱和磁化强度(Ms)提高17±1倍;SEM发现多孔结构内局部MWNTs呈有序化排列;当MWNTs含量为2wt%时,序列化Ni/MWNTs-EP材料较MWNTs-EP材料断裂拉伸力提高了49.94%。

Ni/MWNTs were prepared by MWNTs with the chemical plating process. Ni/MWNTs were heat-treated under conditions of 500 ± 0.5 ℃. The complex method of magnetic induction/ice template stereotypes was being used to add heat-treated Ni/MWNTs into chitosan solution, and being freeze dried to forming Ni/MWNTs-CHI porous structure which was composed of ordered arrays of MWNTs. The porous structure was immersed in the epoxy resin- curing agent- acetone system mixture, and Ni/MWNTs- EP composite material was prepared by vacuum drying 10 h. The Ni/MWNTs were characterized by scanning electron microscopy analysis and vibrating sample magnetometer（VSM）. Porous structure of Ni/ MWNTs-CHI were observed by SEM. Mechanical properties of composite materials were characterized by computer-controlled electronic universal testing machine. The results show that： heat treatment can uniform Ni layer, and the saturation magnetization（Ms） after heat treatment. SEM analysis indicates that partial of Ni/MWNTs can be improved by 17 ± 1 times MWNTs achieve the orderly arrangement in the porous structure. When the content of MWNTs is 2wt%, the tensile strength of serialization of Ni/ MWNTs-EP material improves 49.94% compared with the MWNTs-EP material.