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제126회 대한화학회 학술발표회 및 총회 Improved network formation in polyelectrolyte complex hydrogels via suppression of micellization

등록일
2020년 9월 2일 10시 37분 03초
접수번호
0312
발표코드
POLY.P-7 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
10월 21일(수) 16:30~17:00
발표형식
포스터
발표분야
Polymer Chemistry
저자 및
공동저자
Jihoon Han, Younsoo Kim1,*
Materials Science and Engineering, Pohang University of Science and Technology, Korea
1Department of Materials Science and Engineering, Pohang University of Science and Technology, Korea
Physical hydrogels composed of oppositely charged polyelectrolytes have unique functions like sol-gel transition and self-healing. However, it is difficult to obtain both of high water content and excellent mechanical properties in the physical hydrogel. Generally, physical hydrogels can be easily obtained by using ABA triblock copolymers, where A blocks are charged blocks and B blocks are hydrophilic neutral blocks. At critical gelation concentration, ABA triblock copolymers construct a 3-dimensional polymer network through self-assembled micelles, especially flower-type micelles. In this case, the loop-shaped polymers do not contribute to connection of network at all, which lowers the efficiency of gel formation. Here, we propose new BABAB pentablock copolymers showing direct network formation rather than loop formation through suppression of micellization. The mechanism of the directly formed polymer network as well as the rheological properties of our hydrogels will be discussed.

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