| 학회 |
한국고분자학회 |
| 학술대회 |
2011년 봄 (04/07 ~ 04/08, 대전컨벤션센터) |
| 권호 |
36권 1호 |
| 발표분야 |
고분자 구조 및 물성 |
| 제목 |
Morphological Transition of Block Copolymer Micelle Complexesby Varying Solution pH |
| 초록 |
The morphology of charged block copolymer micelle complexes, consisting of poly(styrene-b-acrylic acid) (PS-b-PAA) and poly(styrene-b-4-vinyl pyridine) (PS-b-P4VP) micelles, was controlled by pH of aqueous solvent. The charge densities of the corona block segments (PAA or P4VP blocks) dispersed in water were the sensitive functions of solution pH. The high pH region (pH > 6.5) is particularly interesting in the present case due to the formation of spherical micelle clusters since the degree of ionization of the P4VP blocks is almost negligible while PAA blocks are fully charged in this regime. These spherical clusters were then slowly transformed into different morphologies when the solution pH was adjusted to the range allowing both of the corona blocks to be oppositely charged. The present study demonstrates that the kinetic pathway for the formation and transformation of micelle complexes at various solution pH is significantly important for the control of packing symmetry. |
| 저자 |
이미숙1, 홍진기2, 차국헌3
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| 소속 |
1지능형 유도조합체 연구단, 2화학생물공학부, 3서울대 |
| 키워드 |
Block Copolymer; Micelle; Polymeric Nanoparticle; Packing Symmetry
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| E-Mail |
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