关键词: 碳纳米管, 聚合物, 电磁屏蔽效能, 填充量, 长径比, 管径

Abstract: In this paper，the research progress in carbon nanotube filled polymer based composites for electromagnetic shielding was overviewed. By explaining the need for the development of electromagnetic shielding materials，the electromagnetic shielding mechanism of composite was introduced，then attention was focused on the effect of carbon nanotube addition，aspect ratio and diameter，the thickness of the shield，composite processing on the electromagnetic shielding performance of the composites. Finally，the prospect of the future research trend of carbon nanotube filled polymer based composites for electromagnetic shielding was given：the addition of low-cost filler could have a synergistic effect or not with carbon nanotube；how to design the preparation process to solve the dispersion of carbon nanotube；based on the microscopic structure of carbon nanotube，enrich the theoretical content of the electromagnetic shielding mechanism of composite；how to control the addition amount of carbon nanotube，making the absorption as the main shielding mode.

Key words: carbon nanotube, polymer, electromagnetic shielding, addition, aspect ratio, diameter