Textile Science and Engineering (한국섬유공학회지)

The Korean Fiber Society (한국섬유공학회)
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Rheological Properties of Poly(ethyleneoxide-propyleneoxide-ethyleneoxide) Hydrogel

Poly(ethyleneoxide-propyleneoxide-ethyleneoxide) 하이드로겔의 유변학적 특성 연구

  • Choi, Min-Hoon (Department of Molecular System Engineering, Hanyang University) ;
  • Kang, Jun-Tae (Department of Molecular System Engineering, Hanyang University) ;
  • Kim, Duk-Ki (Department of Molecular System Engineering, Hanyang University) ;
  • Kim, Seong-Hun (Department of Molecular System Engineering, Hanyang University)
  • 최민훈 (한양대학교 응용화공생명공학부 분자시스템공학과) ;
  • 강전태 (한양대학교 응용화공생명공학부 분자시스템공학과) ;
  • 김덕기 (한양대학교 응용화공생명공학부 분자시스템공학과) ;
  • 김성훈 (한양대학교 응용화공생명공학부 분자시스템공학과)
  • Published : 2009.08.31
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Abstract

Hydrogel is prepared using triblock copolymer of poly(ethyleneoxide-propyleneoxide-ethyleneoxide) with different block contents. Each hydrogel showed different rheological and thermal behavior according to the conditions of gelation such as solution temperature, the content of block copolymer, and block ratio between ethylene oxide and propylene oxide. In this hydrogel system, poly(propyleneoxide) and poly(ethyleneoxide) acted as hydrophobic and hydrophilic domains, respectively. In aqueous solution, block copolymer acts as a surfactant, and then formed micelles due to the hydrophilic-lyophobic balance. These micelles aggregated and formed a lattice structure. In temperature sweeping using Rheometer, transition of aqueous block copolymer solution was developed from a liquid state through soft-gel state to hard-gel state as increasing temperature. Hydrogels with different block ratio of PPO and PEO represent different sol-gel and gel-sol transition point.

Keywords

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