화학공학소재연구정보센터
학회 한국고분자학회
학술대회 2019년 봄 (04/10 ~ 04/12, 부산컨벤션센터(BEXCO))
권호 44권 1호
발표분야 대학원생 구두발표 (발표15분)
제목 Transition of Solution Assembly Behaviors from Nanowires to Micelles Using Regioregularity-Controlled P3HT-b-P2VP Block Copolymers
초록 In selective solvents, poly(3-hexylthiophene) (P3HT)-based block copolymers (BCPs) assemble into crystallized nanowire (NW) structures due to rigid P3HT blocks. Herein, we report the effect of the crystalline interactions of P3HT block on the self-assembled structure of P3HT-block-poly(2-vinylpyridine) copolymers in solvent by tuning the regioregularities (RRs) of P3HT. We synthesized a series of BCPs that had the same molecular weights but various RRs, ranging from 55 to 95%, and investigate their behavior in a binary solvent mixture. The well-defined NW structures were produced from BCP with high RR (95%). As decreasing RR, more flexible P3HT chains produced gradual increases in the width of NWs, from 12 to 24 nm. A morphological transition to spherical micelle structures was observed at 55% RR. The structural differences were visualized by incorporating Au nanoparticles, which locate at the interface of P3HT and P2VP blocks, onto NWs and imaging the resulting hybrid nanostructures.
저자 김영권1, 김형준2, 김진성3, 윤홍석1, 박현정1, 한정훈1, 김범준1
소속 1KAIST, 2Univ. of Massachusetts, 3Amherst
키워드 P3HT; regioregularity; block copolymer; solution assembly; transition
E-Mail bjkim02@kaist.ac.kr