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  • 09월 05일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제120회 대한화학회 학술발표회, 총회 및 기기전시회 안내 UV-mediated synthesis of thermoresponsive alginate hydrogels and tuning their responsive properties

2017년 8월 24일 10시 52분 31초
POLY.O-5 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
금 15시 : 30분
Polymer Chemistry - Oral Presentation for Young Scholars in Polymer Chemistry
저자 및
Eun Jung Choi, Changsik Song*, Ju Hyen Lee, TaeWoo Kim1
Department of Chemistry, Sungkyunkwan University, Korea
1Sungkyunkwan University, Korea
Stimuli-responsive polymers, which can change their microstructures triggered by environmental stimuli, can be used in shape memory materials because of the fact that the structural changes from the external stimuli can be recovered to their original shapes in a controllable manner. Sodium alginate is one of polysaccharides that can be easily functionalized by several coupling reactions such as amination to carboxylate groups. Also, sodium alginate is well-known for capturing divalent ions giving rise to gelation. In this study, allyl-functionalized alginates were synthesized and subsequently N-isopropylamine (NIPAM)-containing alginate hydrogels were prepared by UV-mediated crosslinking via radical reaction. The pNIPAM-crosslinked alginate hydrogels showed different swelling ratios depending on the amount of NIPAM, pH, temperature and several metal cations. The morphology of the hydrogels was investigated by SEM images. Also, the ion-promoted crosslinking showed shape-programming properties with temperature cycling. Several analytical techniques such as IR and rheology were attempted to elucidate the mechanism of shape memory