Institute of Physics and Materials Science, University of Natural Resources and Life Sciences Vienna, Peter-Jordan-Straße 82, 1190 Vienna, Austria.
Department of Structural Engineering, Ghent University, 9000 Ghent, Belgium.
Molecules. 2019 Jan 31;24(3):510. doi: 10.3390/molecules24030510.
Sample preparation is an important step when testing the mechanical properties of materials. Especially, when carbon nanotubes (CNT) are added to epoxy resin, the increase in viscosity complicates the casting of testing specimens. We present a vacuum casting approach for different geometries in order to produce specimens from functional nanocomposites that consist of epoxy matrix and oxidized multi-walled carbon nanotubes (MWCNTs). The nanocomposites were characterized with various mechanical tests that showed improved fracture toughness, bending and tensile properties performance by addition of oxidized MWCNTs. Strengthening mechanisms were analyzed by SEM images of fracture surfaces and in-situ imaging by digital image correlation (DIC).
样品制备是测试材料力学性能的重要步骤。特别是当将碳纳米管（CNT）添加到环氧树脂中时，增加的粘度会使测试样品的浇铸变得复杂。我们提出了一种用于不同几何形状的真空浇铸方法，以便从由氧化多壁碳纳米管（MWCNT）和环氧树脂组成的功能纳米复合材料中生产样品。通过添加氧化 MWCNT，对纳米复合材料进行了各种机械测试，结果表明断裂韧性、弯曲和拉伸性能得到了提高。通过对断裂表面的 SEM 图像和数字图像相关（DIC）的原位成像来分析增强机制。
