Park Sung-Hoon, Ha Ji-Hwan
Department of Mechanical Engineering, Soongsil University, 369 Sangdo-ro, Dongjak-Gu, Seoul 06978, Korea.
Materials (Basel). 2019 Apr 29;12(9):1395. doi: 10.3390/ma12091395.
We report the enhanced electromagnetic interference (EMI) shielding properties of hybrid carbon nanotube (CNT) composites consisting of more than two kinds of fillers through the use of segregate conducting networks. An excluded volume was created by micro-sized silica particles that concentrate the CNT network, resulting in improved electrical conductivity and microwave properties. To achieve the optimal dispersion of CNTs and silica particles, high shear force was applied to the pre-cured composite mixture via three-roll milling. Depending on the micro-silica content ratio, we observed improved electrical conductivity and EMI shielding properties. For a quantitative comparison to observe the excluded-volume effects, a CNT composite without micro-silica was measured in parallel with the other sample.
我们报道了通过使用隔离导电网络，由两种以上填料组成的混合碳纳米管（CNT）复合材料增强的电磁干扰（EMI）屏蔽性能。微米级二氧化硅颗粒形成了一个排除体积，使CNT网络集中，从而提高了电导率和微波性能。为了实现CNT和二氧化硅颗粒的最佳分散，通过三辊研磨对预固化的复合混合物施加高剪切力。根据微二氧化硅含量比，我们观察到电导率和EMI屏蔽性能有所改善。为了进行定量比较以观察排除体积效应，将不含微二氧化硅的CNT复合材料与其他样品并行测量。
