The soluble multi-wall carbon nanotube(MWNT) was prepared by acid-treatment.The acid-treated MWNT could be dispersed into water to form very stable aqueous colloids with the help of ultrasonication.

• 采用加热氧化法制备了可溶性多壁碳纳米管，借助超声作用把可溶性多壁碳纳米管分散在水中形成水溶胶。