Octadecylamine-grafted partially unzipped carbon nanotubes (PUCNT-C18) incorporated thin-film nanocomposite (TFN) reverse osmosis (RO) membrane with high separation performance
발표자
()
초록
내용
Thin-film nanocomposite (TFN) membranes containing carbon nanotubes (CNTs) are known to exhibit higher water permeability than conventional thin-film composite (TFC) membranes. However, CNTs has the poor dispersion stability to most of solvents. Thus, to incorporate CNTs into polymer membrane without aggregation it should be oxidized and dispersed in aqueous phase during the interfacial polymerization (IP). The aim of this study is to increase the dispersion stability of CNTs to the organic solvent by modifying CNT to partially unzipped carbon nanotube (PUCNT) and grafting octadecylamine on PUCNT. TFN membrane fabricated by introducing PUCNT-C18 as a filler of organic phase could maximize the manifestation of the properties of CNTs. Also, TFN with PUCNT-C18 showed much higher pure water flux than TFC, which was comparable to that of TFN with oxidized CNT. These results indicate that controlling the position of nanomaterials could improve the performance of TFN membrane.