Xiong Xuhai, Zhao Pu, Ren Rong, Cui Xu, Ji Shude
Liaoning Key Laboratory of Advanced Polymer Matrix Composites, Shenyang Aerospace University, Shenyang 110136, China.
Shenyang National Laboratory for Materials Science, Advanced Carbon Division, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China.
Nanomaterials (Basel). 2019 Aug 22;9(9):1188. doi: 10.3390/nano9091188.
Multi-walled carbon nanotubes (MWCNTs) in the form of "forests" were synthesized directly on the surface of stainless steel (SS) mesh from ethanol flame volume. The growth dependence of the MWCNT forests on the porosity of SS mesh substrate and the morphologies and growth mechanism of the MWCNT forests were investigated in detail by a combination of turbulent flow simulation, scanning electron microscopy (SEM), transmission electron microscope (TEM), and Raman and X-ray diffraction (XRD) spectroscopy. The growth height of the MWCNT forests exhibited a strong dependence on the flame gas flow rate controlled by the porosity of SS mesh substrate, and the maximum averaged height of the MWCNT forests reached 34 μm. Most MWCNTs grew perpendicularly on the surface of SS wires, and some branch, welded, and spiral structures were observed by SEM and TEM. The MWCNT-decorated mesh was used as a novel heating element to weld glass-fabric-reinforced polyetherimide (GF/PEI) thermoplastics. We found that the maximum tensile lap-shear strength (LSS) of the welded joints could reach 39.21 MPa, an increase of 41% in comparison with that of conventional SS mesh-based joints.
以“森林”形式存在的多壁碳纳米管（MWCNTs）通过乙醇火焰在不锈钢（SS）网表面直接合成。通过湍流模拟、扫描电子显微镜（SEM）、透射电子显微镜（TEM）以及拉曼光谱和X射线衍射（XRD）光谱相结合的方法，详细研究了MWCNT森林对SS网基材孔隙率的生长依赖性以及MWCNT森林的形态和生长机制。MWCNT森林的生长高度对由SS网基材孔隙率控制的火焰气体流速表现出强烈依赖性，MWCNT森林的最大平均高度达到34μm。大多数MWCNTs垂直生长在SS丝表面，通过SEM和TEM观察到一些分支、焊接和螺旋结构。MWCNT修饰的网被用作一种新型加热元件来焊接玻璃纤维增强聚醚酰亚胺（GF/PEI）热塑性塑料。我们发现焊接接头的最大拉伸搭接剪切强度（LSS）可达39.21MPa，与传统基于SS网的接头相比提高了41%。
