| 학회 |
한국고분자학회 |
| 학술대회 |
2010년 가을 (10/07 ~ 10/08, 대구 EXCO) |
| 권호 |
35권 2호 |
| 발표분야 |
분자전자소재 및 소자 |
| 제목 |
Thermosensitive Graphene/Polymer Conjugates |
| 초록 |
Stable aqueous solution of graphene is prepared by chemical reduction of graphene oxide (GO) in the presence of poly(N-isopropyl acrylamide) (PNIPAM) or hydroxypropyl cellulose (HPC) in water through the hydrophobic interaction between graphene plates and PNIPAM or HPC backbones. Thermosensitive solubility switching of graphene/polymer conjugates are successfully demonstrated below or above lower critical solution temperature (LCST). In case of graphene/PNIPAM conjugate, LCST of graphene/PNIPAM assembly (up to 42 oC) is higher than LCST of pure PNIPAM (36 oC) because interacting PNIPAM chains on graphene plates are less mobile than free PNIPAM chains. The success of PNIPAM as stabilizer for reduced graphene solution can be explained by both efficient hydrophobic interaction with graphene surface and matching of surface tension of water (72.8 mJ/m2) with ‘graphene friendly surface tension’ (40~50 mJ/m2) by the addition of PNIPAM in water (41.8 mJ/m2). |
| 저자 |
이다영, 윤세영, 박성영, 인인식
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| 소속 |
충주대 |
| 키워드 |
Graphene; LCST; PNIPAM; HPC; Thermo-sensitive
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| E-Mail |
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