Novel star-like surfactant as dispersant for multi-walled carbon nanotubes in aqueous suspensions at high concentration

作者：Qiao, Min; Ran, Qianping; Wu, Shishan^*

来源：Applied Surface Science, 2018, 433: 975-982.

DOI：10.1016/j.apsusc.2017.10.138

• Surfactant
• Star like
• Carbon nanotubes
• Dispersion
• Aqueous suspensions
• High concentration

A kind of novel surfactant with star-like molecular structure and terminated sulfonate was synthesized, and it was used as the dispersant for multi-walled carbon nanotubes (CNTs) in aqueous suspensions compared with a traditional single-chained surfactant. The star-like surfactant showed good dispersing ability for multi-walled CNTs in aqueous suspensions. Surface tension analysis, total organic carbon analysis, X-ray photoelectron spectroscopy, zeta potential, dynamic light scattering and transmission electron microscopy were performed to research the effect of star-like surfactant on the dispersion of multi-walled CNTs in aqueous suspensions. With the assistance of star-like surfactant, the CNTs could disperse well in aqueous suspension at high concentration of 50 g/L for more than 30 days, while the CNTs precipitated completely in aqueous suspension after 1 day without any dispersant or after 10 days with sodium 4-dodecylbenzenesulfonic acid as dispersant.

• 出版日期2018-3-1
• 单位南京大学