Article
  • Effects of pH and Mixed Solvents on Swelling Properties of Crosslinked Poly(N-isopropyl acrylamide) Gels
  • Kim SY, Kim YJ, Sung YK
  • 가교된 폴리(N-이소프로필아크릴아마이드)겔의 팽윤성에 대한 pH 및 혼합용매의 영향
  • 김수연, 김용주, 성용길
Abstract
The swelling transition phenomena of poly(N-isopropyl acrylamide-ethylene glycol dimethacrylate)[P(NIPAAm-EGDMA)] and poly(N-isopropyl acrylamide-divinyl benzene)[P(NIPAAm-DVB)] occurred near 30℃ and 25℃, respectively. Crosslinked P(NIPAAm-EGDMA) and P(NIPAAm-DVB) hydrogels also exhibited endothermic peaks near 30℃ and 25℃, respectively. The swelling degrees of the crosslinked P(NIPAAm-EGDMA) in the mixture of 1,4-dioxane and water had maximum values near 85%(V/V) of 1,4-dioxane in the mixture. The swelling degree of the crosslinked P(NIPAAm-EGDMA) in the pH controlled buffer solution had minimum value near pH 7.5 but that of crosslinked P(NIPAAm-DVB) did not change nearly.

폴리(N-이소프로필 아크릴아마이드-에틸렌글리콜 디메타클레이트)[P(NIPAAm-EGDMA)] 및 폴리(N-이소프로필 아크릴아마이드-디비닐벤젠)[P(NIPAAm-DVB)]의 팽윤전이현상이 각각 30℃와 25℃ 근처에서 일어났다. 또한 가교된 P(NIPAAm-EGDMA) 수화겔은 30℃ 근처에서 흡열피이크를 보이고, 가교된 P(NIPAAm-DVB) 수화겔은 25℃ 근처에서 각각 흡열피이크가 나타났다. 1,4-디옥산과 물의 혼합용액에서 가교된 P(NIPAAm-EGDMA)와 P(NIPAAm-DVB)의 팽윤도는 1,4-디옥산이 85%(V/V)되는 근처에서 최대값이 나타났다. pH가 조절된 완충용액에 대한 가교된 P(NIPAAm-EGDMA)의 팽윤도는 pH 7.5 근처에서 최소값을 가지나 가교된 P(NIPAAm-DVB)의 팽윤도는 거의 변하지 않았다.

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  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2022 Impact Factor : 0.4
  • Indexed in SCIE

This Article

  • 1991; 15(5): 531-538

    Published online Oct 25, 1991