Modification of multi-walled carbon nanbtubes with p-aminobenzenesulfonic acid by a two-step method

作者：Yang Jia Yi^*; Shi Tie Jun; Jin Wei Ya; Zou Yan

来源：Acta Chimica Sinica, 2008, 66(5): 552-556.

• multi-walled carbon nanotube
• p-aminobenzenesulfonic acid
• superficial modification
• N,N '-dicyclohexylcarbodiimide

Multi-walled carbon nanotubes (MWCNT) have been treated by mixed acids, resulting in the formation of many carboxyl groups on their sides. With the action of N,N'-dicyclohexylcarbodiimide, p-aminobenzenesulfonic acid could be grafted to MWCNT. Taking the strong sulfuric acid as the sulfonation agent, sulfonated poly(ether ether ketone) (SPEEK) was prepared under room temperature. SPEEK/grafted-WMCNT composite film could be prepared by a solution blending method. The structure and properties of the modified MWCNT were characterized by FT-IR, TGA, TEM and Raman spectra. The FT-IR spectrum showed that the amino group of p-aminobenzenesulfonic acid reacted with the carboxyl on the sides of the MWCNT, and the process created an amide group. The TGA curves showed that the weight ratio of the organic group grafted on the MWCNT surfaces reached 40%. The Raman spectrum showed that the ratio of I-D/I-G changed very slightly, which indicated that the content of the graphite structure of the MWCNT was not changed basically. The measurement of mechanical properties of the composite film showed that the grafted-MWCNT could increase the tensile strength of the film.

• 出版日期2008-3-14
• 单位合肥工业大学; 合肥通用机械研究院