| 학회 |
한국고분자학회 |
| 학술대회 |
2013년 봄 (04/11 ~ 04/12, 대전컨벤션센터) |
| 권호 |
38권 1호 |
| 발표분야 |
고분자구조 및 물성 |
| 제목 |
Thermal behavior of semifluoronated smectic liquid crystals |
| 초록 |
A smetic phase of liquid crystal (SmLC) has been commonly known to have layered structure symmetrically forming focal conic domain along with defect line. Such layered perfluoronated SmLCs are thermally sublimated and then form noble 3D structures. Here, we have synthesized rod-like SmLC molecules by increasing methyl group gradually in biphenyl carboxylates (head group) having fluorinated alkyl chain (tail group). We measured weight lose percentage and thermal phase transition with Thermogravimetric Analysis (TGA) and differential scanning calorimetry (DSC) respectively, and then confirmed that thermal sublimation happen in smetic phase by TGA data. Its unique thermal sublimation property enables to access layer by layer - exfoliated fabrications for various applications. We also have suggested how the length of alkyl chains bonded to head group dependents the temperature of sublimations in terms of molecular interactions by using X-ray diffraction, SEM, TGA and DSC. |
| 저자 |
김대석1, 오성대2, 김문호3, 윤동기1
|
| 소속 |
1Graduate School of Nanoscience and Technology (WCU), 2KAIST, 3Daejeon 305-701 |
| 키워드 |
sublimation; perfluoronated smectic liquid crystal
|
| E-Mail |
|
