| 학회 |
한국고분자학회 |
| 학술대회 |
2021년 봄 (04/07 ~ 04/09, 대전컨벤션센터) |
| 권호 |
46권 1호 |
| 발표분야 |
고분자구조 및 물성 |
| 제목 |
Salt- and Temperature-dependent Simple Coacervation of Polyether-based Polyguanidinium |
| 초록 |
Simple coacervation is a liquid-liquid phase separation (LLPS) of a single polyelectrolyte solution by adding salts, which are frequently observed in biomolecule condensation such as arginine-rich protamine. The intermolecular interactions including π-π interaction cause the LLPS. In this work, we reported that salt- and temperature-induced simple coacervation of polyether-based polyguanidinium occurs by π-staking of like-charged guanidinium (Gdm) pairs. Gdm functionalized poly(allyl glycidyl ether)s (G-PAGEs) was synthesized by anionic ring opening polymerization and post-modification. Phase transition temperature (Tc) of the G-PAGE solutions was characterized as function of added salt concentration (Csalt) by transmittance. We observed that the G-PAGE solution shows upper critical solution temperature (UCST) within 0 ~ 100 ºC temperature range, and the Tc was modulated by the Csalt. As the results, the Tc increases as increasing Csalt, according to reversed Hofmeister series. |
| 저자 |
오승환1, 최수형1, 이민환2, 김슬우2, 이원보2
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| 소속 |
1홍익대, 2서울대 |
| 키워드 |
Liquid-liquid phase separation; simple coacervation; guanidinium; π-π interaction
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| E-Mail |
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