| 학회 |
한국고분자학회 |
| 학술대회 |
2018년 가을 (10/10 ~ 10/12, 경주컨벤션센터) |
| 권호 |
43권 2호 |
| 발표분야 |
고분자가공/복합재료 |
| 제목 |
Pickering-Emulsion-Polymerized Polystyrene/Fe3O4-based Magnetorheological Suspension with High Performance and Enhanced Sedimentation Stability |
| 초록 |
The magnetorheological (MR) performance of suspensions based on core–shell-structured foamed polystyrene (PSF)/Fe3O4 particles was investigated. Core–shell-structured polystyrene (PS)/Fe3O4 was synthesized by using the Pickering-emulsion polymerization method. PS core was foamed by using a supercritical carbon dioxide (scCO2) fluid. The density of the core–shell-structured composites particles was measured by a pycnometer. The densities of PS/ Fe3O4 and PSF/ Fe3O4 particles were much lower than that of the pure Fe3O4 particle. All suspensions showed similar MR behaviors but different yield strengths due to the different surface density of Fe3O4 on the PS surface. The suface of PS/Fe3O4 and PSF/ Fe3O4 was rough, which could decrease the sedimentation velocity of the composite particle. And finally, the suspensions of PS/Fe3O4 and PSF/Fe3O4 showed remarkably improved sedimentation stability compared to Fe3O4-based suspensions. |
| 저자 |
최준석, 서용석, 한상석
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| 소속 |
서울대 |
| 키워드 |
magnetorheological suspensions; Pickering emulsion polymerization; Foaming; core-shell structure; sedimentation stability
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| E-Mail |
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