关键词: 碳纳米管, 表面改性, 纳米复合材料

Abstract: Surface modification of CNTs can improve their surface activity，dispersion ability，and the compatibility between CNTs and base matrix，resulting in reinforcement of composite material. The methods of surface modification of CNTs are classified into physical methods and chemical methods. The physical methods consist of high-energy mechanical polishing method，high-energy ball milling method，and ultrasonic vibration method. The chemical methods consist of acid treatment method，method of coupling agent，electroless plating method，high-energy rays irradiation method，and atom transfer radical polymerization. In practical application，several modification methods can be used in combination to make the performance more stable and achieve more diverse properties. Meanwhile，the applications of modified carbon nanotubes to various composite materials are reviewed. Two focal points in modification of carbon nanotubes are proposed：one is to keep structural integrity of carbon nanotube itself，the second is to improve the dispersion of carbon nanotubes in the matrix.

Key words: carbon nanotube, surface modification, nano-composite