| 학회 |
한국화학공학회 |
| 학술대회 |
2021년 가을 (10/27 ~ 10/29, 광주 김대중컨벤션센터) |
| 권호 |
27권 2호, p.1324 |
| 발표분야 |
고분자 |
| 제목 |
Liquid-liquid Phase Separation of Polyether-based Polyguanidinium in Aqueous Solution: The Role of Strong π-stacking |
| 초록 |
Simple coacervation is liquid-liquid phase separation (LLPS) of a polyelectrolyte solution induced by adding salts. Mostly, multivalent salts bridge the polyelectrolytes, resulting in LLPS as observed in arginine-rich protamine. In this work, we demonstrate that a monovalent salt cause LLPS of positively charged polyguanidinium. Well-defined guanidinium -functionalized poly(allyl glycidyl ether) (G-PAGE) was synthesized by anionic ring-opening polymerization and post-modification, producing ideal polymer system to investigate LLPS in aqueous media. Upper critical solution temperature (UCST) behavior of LLPS and the salt-concentration dependence of the transition temperature are observed. Also, the combination of the molecular dynamics (MD) simulation, infra-red (IR) spectroscopy, and the surface forces apparatus (SFA) confirms that the π-π interaction between guanidinium moieties plays a significant role to cause the LLPS with the help of salt molecules. |
| 저자 |
오승환1, 이진훈2, 이민환3, 김슬우3, 이원보3, 이동욱2, 최수형1
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| 소속 |
1홍익대, 2UNIST, 3서울대 |
| 키워드 |
첨단고분자 |
| E-Mail |
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| 원문파일 |
초록 보기 |
