| 학회 |
한국고분자학회 |
| 학술대회 |
2007년 가을 (10/11 ~ 10/12, 일산킨텍스) |
| 권호 |
32권 2호 |
| 발표분야 |
기능성 고분자 |
| 제목 |
Thermosensitive Microgels Prepared from Precipitation Polymerization of N-isopropylacrylamide |
| 초록 |
Thermosensitive poly(N-isopropylacrylamide) (PNIPAAm) microgels that have regularity on a sub-micrometer diameter scale were prepared by precipitation polymerization method in water at 70 ˚C using potassium persulfate as an initiator and N,N'-methylenebisacrylamide (MBA) as a crosslinking agent. The size and swelling behavior of the PNIPAAm microgels as a function of temperature was investigated using a TEM and a particle size analyzer. PNIPAAm microgels could not be obtained or coagulated at MBA concentration of higher than 3% to total monomer weight. The diameters of the PNIPAAm microgels immersed in water at 10 ˚C and 50 ˚C were 845 nm and 181 nm, respectively. Swelling ratio of the microgel calculated from these diameters was 103 and it decreased abruptly around its lower critical solution temperature of 32 °C. |
| 저자 |
함명조, 고재훈, 김영호
|
| 소속 |
숭실대 |
| 키워드 |
thermosensitive; poly(N-isopropylacrylamide); microgel; swelling ratio
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| E-Mail |
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