화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Macromolecular Research, Vol.18, No.6, 589-595, June, 2010
DOI10.1007/s13233-010-0614-x  Export Citation
Picolyamine Based pH/Temperature Sensitive Hydrogels
Dai Phu Huynh, Cong Truc Huynh1, and Doo Sung Lee1, †
  • National Key Laboratory of Polymer and Composite Materials, HoChiMinh City University of Technology, 268 LyThuongKiet, Dist. 10, HoChiMinh City, Vietnam
  • 1Department of Polymer Science and Engineering, Sungkyunkwan University, Gyeonggi-do, 440-746, Korea
E-mail:
pH/temperature-sensitive hydrogels have attracted increasing attention as drug/protein delivery systems. This study reports a new pH sensitive moiety of picolyamine (PCA) and its pentablock copolymer hydrogels made from triblock PCL-PEG-PCL and picolyamine oligomer (OPCA). The picolyamine monomer (PCAM) was synthesized using the picolyamine and methacryloyl chloride coupling reaction. OPCA was synthesized by conventional radical polymerization from PCAM. The pKa of the pH sensitive moiety, OPCA, was found to be 6.65. The moiety was used to couple with PCL-PEG-PCL to produce the pentablock copolymer, OPCA-PCL-PEG-PCL-OPCA. The sol-gel phase transition of the aqueous solution of this material was affected by the pH and temperature change. In addition, the gel phase region could be controlled by the molecular weight of OPCA, the PCL/PEG ratio and chain length of PEG. This material could be used as an injectable hydrogel for drug/protein delivery.
Keywords:pH/temperature-sensitive;hydrogels;picolyamine
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