| 학회 |
한국화학공학회 |
| 학술대회 |
2019년 가을 (10/23 ~ 10/25, 대전컨벤션센터) |
| 권호 |
25권 2호, p.1397 |
| 발표분야 |
미립자공학 (Fine Particles Technology) |
| 제목 |
Preparation of a stable colloidal MXene dispersion in high salinity solution by grafting polyelectrolyte stabilizers |
| 초록 |
There has been much effort in exploiting nanotechnology in various subsurface applications. One of the important challenges in such applications is to maintain the colloidal stability of nanomaterials in high salinity conditions of subsurface media. Here, we consider 2D titanium carbide (Ti3C2-MXenes) nanosheets as an effective scavenger of various aqueous pollutants. It was found that pristine MXenes were not stable in high salinity solutions containing both mono and divalent salts, likely due to the charge screening effects in high ionic strength and bridging effects caused by excess divalent cations. We prepared a stable colloidal dispersion of MXenes in high salinity solution, by grafting polyelectrolyte stabilizers. It was found that MXenes grafted with both anionic and zwitterionic copolymers showed excellent colloidal stability in standard American Petroleum Institute (API) brine (8% NaCl+2% CaCl2 by wt%) over four weeks. With respect to the long term stability over several months, MXenes grafted with the zwitterionic copolymers exhibited much slower sedimentation than those grafted with the anionic copolymers – possible mechanisms are discussed. |
| 저자 |
임세형, 박현수, 곽채수, 양지원, 김지은, 김지은, 이주형
|
| 소속 |
명지대 |
| 키워드 |
미립자; 다기능성
|
| E-Mail |
|
| 원문파일 |
초록 보기 |
