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碳纳米管薄膜电热特性及其除冰性能
秦文峰, 游文涛, 钟勉, 范宇航, 韩孝强
中国民航飞行学院航空工程学院,广汉 618307
摘要:
采用碳纳米管薄膜(CNTF)作为电加热元件,研究碳纳米管薄膜对玻璃纤维增强树脂基复合材料结构表面的除冰性能,同时研究其电热性能。SEM发现样品内碳纳米管错综交缠、有较大孔隙率,厚度在14 µm左右。XRD表明CNTF样品为微晶结构,结晶度差且含有少量杂质。空气环境通电,升温速率和最高恒定温度随输入电压增大而迅速提高。输入电压为5 V时,前100 s升温速率为0.91 ℃/s,180 s时到达最高恒定温度95 ℃。在四次电热循环后,其表面电阻略有升高,均值从2.795 Ω到3.870 Ω。在9 V输入电压下,CNTF被迅速烧断,CNTF样品电流承载极限在1.8 A左右。利用其焦耳热性能进行除冰,质量为20 g冰块在树脂基玻璃纤维复合材料样品的表面脱落时间为240 s。表明CNTF在飞机除冰领域具有潜在应用价值。
关键词:  碳纳米薄膜  微观形貌  电导率  焦耳热  除冰
DOI:10.12044/j.issn.1007-2330.2018.06.017
分类号:
基金项目:中国民航飞行学院面上项目(XM2504,BJ2016-04);大学生创业创新项目(201710624005)
Electrothermal Energy and Deicing Properties of Carbon Nanotube Films
QIN Wenfeng, YOU Wentao, ZHONG Mian, FAN Yuhang, HAN Xiaoqiang
Aviation Engineering Institute,Civil Aviation Flight University of China,Guanghan 618307
Abstract:
Carbon nanotube film (CNTF) was used as an electric heating element to study the deicing and electrothermal properties of carbon nanotubes(CNTF) on the surface of glass fiber resin matrix composites.SEM result showed that the samples were intertwined by carbon nanotubes with large porosity.The thickness of CNTF was about 14 µm.The XDR results showed that the samples were microcrystalline,poor crystallinity and small amount of impurity.CNTF was electried in air,the rate of heating and the maximum constant temperature increase rapidly with the increase of input voltage.When the input voltage is 5 V,the heating rate of the first 100 s is 0.91 ℃/s and reaches the maximum constant temperature 95 ℃ at 180 s.After four cycles of electrothermal cycling, the surface resistance increased slightly,the mean value was from 2.795 Ω to 3.870 Ω.The CNTF was rapidly burned off at 9 V input voltage.The current carrying limit of CNTF sample is 1.8 A. Deicing is carried out by using its Joule thermal property. The time of 20 g ice falling off the surface of resin matrix glass fiber composite is 240 s.It is proved that it is feasible to deicing by using the electrothermal characteristics of CNTF.
Key words:  Carbon nanofilms  Microscopic morphology  Conductivity  Joule heat  Deicing