摘要
采用TX-10表面活性剂作为分散剂,并用超声波振荡方法对碳纳米管(CNTs)进行了分散处理。利用透射电镜(TEM)观察了超声波振荡时间对碳纳米管分散状态的影响,并评价了碳纳米管的损伤。此外,通过静置悬浊液观察沉淀的方法,研究了该体系的稳定性。结果表明,CNTs的直径越小其抗弯截面系数也越小,在超声波侧向冲击的作用下产生的弯曲正应力越大,超声波振荡造成的损伤也越严重,最终导致较细纳米碳管在剪切的作用下长度急剧下降,这也是影响CNTs分散性及其悬浊液稳定性的重要原因。
Using TX-10 as surfactants, carbon nanotubes （CNTs） were dispersed by ultrasonic oscillation. The effects of ultrasonic oscillation on the dispersity and damage of CNTs were studied with TEM. And the stability was evaluated with settlement time of the suspension. The results show that the smaller diameter of the CNTs, the smaller of the bending section modulus, and the bending normal stresses caused by ultrasonic lateral impact force are greater, the damage caused by ultrasonic oscillation is more serious. As a result,the length of the smaller diameter CNTs decreased significantly due to the shearing. It is also the important factor that affects the dispersity of CNTs and stability of CNTs suspension.
出处
《石油化工高等学校学报》
CAS
2013年第3期57-61,共5页
Journal of Petrochemical Universities
基金
国家重点基础研究计划973项目(2011CB932603
2012CB619600)
关键词
碳纳米管
超声波
分散性
损伤
Carbon nanotubes
Ultrasonic oscillation
Dispersity
Damage
