Kim Dong-Kyu, Han Woong, Kim Kwan-Woo, Kim Byung-Joo
Industrialization Division, Korea Carbon Industry Promotion Agency, Jeonju 54852, Republic of Korea.
Department of Carbon Materials and Fiber Engineering, Jeonbuk University, Jeonju 54896, Republic of Korea.
Materials (Basel). 2023 Mar 24;16(7):2604. doi: 10.3390/ma16072604.
In this study, carbon nanotubes (CNTs) were grown under the same conditions as those of carbon fibers and glass fibers, and a comparative analysis was performed to confirm the potential of glass fibers with grown CNTs as electromagnetic interference (EMI) shielding materials. The CNTs were grown directly on the two fiber surfaces by a chemical vapor deposition process, with the aid of Ni particles loaded on them via a Ni-P plating process followed by heat treatment. The morphology and structural characteristics of the carbon and glass fibers with grown CNTs were analyzed using scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS), X-ray diffraction (XRD), and X-ray photoelectron spectrometry (XPS), and the EMI shielding efficiency (EMI SE) of the directly grown CNT/carbon and glass fiber-reinforced epoxy matrix composites was determined using a vector-network analyzer. As the plating time increased, a plating layer serving as a catalyst formed on the fiber surface, confirming the growth of numerous nanowire-shaped CNTs. The average EMI SE values of the carbon fiber-reinforced plastic (CFRP) and glass fiber-reinforced plastic (GFRP) with grown CNTs maximized at approximately 81 and 40 dB, respectively. Carbon fibers with grown CNTs exhibited a significantly higher EMI SE value than the glass fiber-based sample, but the latter showed a higher EMI SE increase rate. This indicates that low-cost, high-quality EMI-shielding materials can be developed through the growth of CNTs on the surface of glass fibers.
在本研究中，碳纳米管（CNT）在与碳纤维和玻璃纤维相同的条件下生长，并进行了对比分析，以确认生长有CNT的玻璃纤维作为电磁干扰（EMI）屏蔽材料的潜力。通过化学气相沉积工艺，在镍颗粒的辅助下，先通过镍 - 磷镀覆工艺在两种纤维表面负载镍颗粒，然后进行热处理，从而直接在纤维表面生长CNT。使用扫描电子显微镜 - 能量色散X射线光谱仪（SEM - EDS）、X射线衍射仪（XRD）和X射线光电子能谱仪（XPS）分析了生长有CNT的碳和玻璃纤维的形态及结构特征，并使用矢量网络分析仪测定了直接生长的CNT/碳和玻璃纤维增强环氧基复合材料的EMI屏蔽效率（EMI SE）。随着镀覆时间的增加，在纤维表面形成了作为催化剂的镀层，证实了大量纳米线状CNT的生长。生长有CNT的碳纤维增强塑料（CFRP）和玻璃纤维增强塑料（GFRP）的平均EMI SE值分别在约81 dB和40 dB时达到最大值。生长有CNT的碳纤维表现出比玻璃纤维基样品显著更高的EMI SE值，但后者显示出更高的EMI SE增长率。这表明通过在玻璃纤维表面生长CNT可以开发出低成本、高质量的EMI屏蔽材料。
