| 초록 |
Polyelectrolytes are polymers whose repeating units bear an electrolyte group. These groups will dissociate in water to make the polymers charged. Carbon nanotubes (CNT) are aggregated and exist as bundles in their native state. The best method to overcome these problems is to introduce various functional groups, such as carboxylic acids, on the surface of CNT, which can improve the dispersion of CNTs in solution or composite materials. Moreover, various functional groups can be introduced through further chemical modification on the carboxylated CNT. In this study, we demonstratde the possibility of using the carboxylated CNT as a polyelectrolyte that can form ionic complexes with a counter ionic polymer; poly(allyamine hydrochloride) (PAH). The effects of CNT/PAH ratio, degree of carboxylation on CNT, molecular weight of PAH, and pH/ionic strength of the media on complexation behaviors were characterized using UV-Vis spectroscopy, Zeta-potential measurement, XPS, and TEM. |
