硫化异丁烯填充碳纳米管的机理研究

Formation mechanism of sulfurized isobutylene filled CNTs

利用液相湿化学法制备了润滑添加剂硫化异丁烯(T321)填充的碳纳米管(CNTs)复合物。首先利用浓酸对CNTs进行开口以及截短化处理,处理后的CNTs的端帽被打开,T321在液相条件下通过毛细作用进入开口CNTs中;然后利用透射电子显微镜、X射线光电子能谱、差热-热重分析、红外光谱等测试手段对复合物的化学成分、形态结构进行表征。实验结果表明,通过液相湿化学法可以得到T321填充的CNTs,在填充过程中二者主要发生物理结合。T321可通过毛细作用渗入CNTs内,二者形成复合物后,CNTs可对其中的T321起保护作用,T321填充CNTs的填充率约25%。

T321-filled CNTs composites were successfully prepared by liquid phase wet chemistry method.Firstly,CNTs were truncated with concentrated acid,and the end cap of CNTs was opened after the treatment.Under the liquid phase condition,T321 was filled in CNTs through capillary action.Then the composition and morphological structure of samples were characterized by transmission electron microscopy,X-ray photoelectron spectroscopy,thermogravimetric analysis and infrared spectroscopy.The results showed that CNTs filled with T321 can be obtained by liquid-phase wet chemistry method.During the filling process,the two were mainly physically combined.The filling rate of CNTs filled with T321 was about 20%.T321 can be infiltrated into CNTs through capillary action,and it can be protected by CNTs after the formation of composites.