| 학회 | 한국화학공학회 |
| 학술대회 | 2007년 가을 (10/26 ~ 10/27, 한국과학기술원) |
| 권호 | 13권 2호, p.1326 |
| 발표분야 | 고분자 |
| 제목 | Sorption and diffusion of carbon dioxide in spherical polymer particles |
| 초록 | Supercritical carbon dioxide is considered as a useful alternative of toxic or volatile organic solvents for polymer synthesis and processing. The use of supercritical carbon dioxide as a solvent offers the possibility to develop clean and environmental friendly processes for the drug delivery system. Supercritical carbon dioxide has excellent plasticizing properties and can swell most polymeric matrix. Biologically active or medical and cosmetic ingredients which were weak to thermal system can be impregnated into polymer without interference on the activity of the active substance because of mild experimental condition of supercritical carbon dioxide. Then, sorption and diffusion properties of carbon dioxide into polymer are very important. Sorption of carbon dioxide and swelling of polymer by sorption of carbon dioxide are enhanced to impregnate of some ingredients into polymer matrix. Spherical polymer particles are synthesized in supercritical carbon dioxide using the dispersion polymerization method. Sorption of polymer is measured with gravimetric method at various time, pressure and temperature. The amounts of sorption and diffusion coefficient as shapes of sample (powder or film) are greatly varied. |
| 저자 | 권소영1, 이경원1, 김효원1, 배 원2, 이윤우1, 김화용1 |
| 소속 | 1서울대, 2미원상사 |
| 키워드 | supercritical carbon dioxide; dispersion polymerization; sorption; diffusion |
| 원문파일 | 초록 보기 |
