We produced carbon nanotubes (CNTs) by pyrolysis of a composite film of poly (vinyl alcohol) (PVA) with fly ash (FA) at 500°C for 10 min under nitrogen. The composite films were prepared by a suspension of PVA and FA in deionized water and cast onto glass petri dishes. The morphologies of the CNTs were observed in the images of scanning and transmission electron microscopy, showing different types of structures, e.g. whiskers, branches, ropes and graphene sheets. The widths of the CNTs measured varied in the range 18–80 nm. X-ray photoelectron spectroscopy analysis showed five types of carbon binding peaks, C–C/C–H (∼77%), C–O–H (∼9%), –C–O–C (∼5%), C=O (∼5%) and –O–C=O (∼3%). From an image of a broken CNT, a mechanism was proposed for the formation of CNTs. The CNTs grown on FA surfaces have potential for the fabrication of high-strength composite materials with polymer and metal.
展开▼
机译：我们通过在氮气下500℃下将聚乙烯醇（PVA）与粉煤灰（FA）的复合膜热解10分钟来生产碳纳米管（CNT）。通过将PVA和FA悬浮在去离子水中制备复合膜，然后将其流延到玻璃培养皿上。在扫描和透射电子显微镜的图像中观察到CNT的形态，显示出不同类型的结构，例如碳纳米管。晶须，树枝，绳索和石墨烯片。测得的CNT的宽度在18-80 nm范围内变化。 X射线光电子能谱分析显示了五种类型的碳结合峰：C–C / C–H（〜77％），C–O–H（〜9％），– C–OC–C（〜5％）， C = O（约5％）和–OC–O（约3％）。从断裂的CNT的图像，提出了形成CNT的机制。在FA表面上生长的CNT具有制造具有聚合物和金属的高强度复合材料的潜力。
展开▼
