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将多壁碳纳米管(MWNTs)在硝酸中回流纯化,使用不同类型的表面活性剂将纯化后的MWNTs功能化分散,再将其加入到聚乙烯醇(PVA)和聚氧化乙烯(PEO)物理共混纺丝溶液中进行静电纺丝。利用扫描电子显微镜(SEM)、红外光谱仪(IR)、X衍射射线仪(XRD)和分光光度计等对纯化和功能化分散的MWNTs以及得到的超细纤维进行表征。结果表明,通过硝酸回流纯化处理,MWNTs的杂质被去除,晶格结构变得更加完整。在超声波作用下,十二烷基硫酸钠使纯化后的MWNTs在水溶液中具有较好的分散稳定性。进行功能化分散的MWNTs的加入使静电纺超细纤维的平均直径减小。
Multi-walled carbon nanotubes (MWNTs) were purified by refluxing in nitric acid, the purified MWNTs were functionally dispersed using different types of surfactants and then added to polyvinyl alcohol (PVA) and polyethylene oxide (PEO) Electrospinning was carried out in the blended spinning solution. The purified and functionalized MWNTs and the resulting microfibers were characterized by scanning electron microscopy (SEM), infrared spectroscopy (IR), X-ray diffractometry (XRD) and spectrophotometer. The results show that the impurities of MWNTs are removed and the lattice structure becomes more complete by the nitric acid reflux purification. Under the action of ultrasound, sodium dodecyl sulfate can make the purified MWNTs have good dispersion stability in aqueous solution. The addition of functionalized dispersed MWNTs reduced the average diameter of electrospun microfibers.