Wang Shiren, Liang Zhiyong, Liu Tina, Wang Ben, Zhang Chuck
Florida Advanced Center for Composite Technologies, Department of Industrial and Manufacturing Engineering, FAMU-FSU College of Engineering, Florida State University, Tallahassee, FL32310, USA.
Nanotechnology. 2006 Mar 28;17(6):1551-7. doi: 10.1088/0957-4484/17/6/003. Epub 2006 Feb 21.
An effective functionalization method was investigated to take full advantage of the exceptional performance of both carbon nanotubes and epoxy polymer for composite application. Epoxy polymer curing agent, EPI-W, was grafted to the single-walled carbon nanotubes through diazotization. Fourier transformed infrared spectroscopy, Raman spectroscopy, differential scanning calorimetry, dynamical mechanical analysis and thermo-gravimetric analysis were performed to characterize the functionalization effect. The degree of functionalization was estimated to be 1 in 50 carbons in the nanotube framework. The elastic modulus of the nanocomposite was enhanced 24.6% with only 0.5 wt% loading of functionalized carbon nanotubes, in contrast to the 3.2% increase of un-functionalized carbon nanotube reinforced composite. This significant improvement suggested an effective way to realize an industrial application of nanotubes reinforcing epoxy composite.
为了充分利用碳纳米管和环氧树脂聚合物在复合材料应用中的优异性能，研究了一种有效的功能化方法。通过重氮化反应将环氧树脂固化剂EPI-W接枝到单壁碳纳米管上。采用傅里叶变换红外光谱、拉曼光谱、差示扫描量热法、动态力学分析和热重分析对功能化效果进行了表征。功能化程度估计为纳米管骨架中每50个碳原子中有1个。与未功能化碳纳米管增强复合材料3.2%的增幅相比，仅0.5 wt%功能化碳纳米管负载量的纳米复合材料的弹性模量提高了24.6%。这一显著改进为实现纳米管增强环氧复合材料的工业应用提供了一种有效途径。
