title: Reverse thermal organogelation of poly(ethylene glycol)-polypeptide diblock copolymers in chloroform.
abstract: Most organogel formation has been observed at low temperatures and the gel melts as the temperature increases. As an opposite case to traditional organogels, we report a reverse thermal gelation of methoxy-aminopoly(ethylene glycol)-homopolypeptide block-copolymer chloroform solutions that undergo a sol-to-gel transition as the temperature increases. A series of methoxy-aminopoly(ethylene glycol)-homopolypeptide block copolymers showing reverse thermal gelation in chloroform was synthesized and we prove that the secondary structure of the polypeptide determines the morphology of the organogel.
authors.affiliation: Department of Chemistry and Nano Science, Ewha Womans University, Daehyun-Dong, Seodaemun-Ku, Seoul, 120-750, Korea.
authors.forename: Yun Young
authors.initials: YY
authors.lastname: Choi
authors.forename: Yuri
authors.initials: Y
authors.lastname: Jeong
authors.forename: Min Kyung
authors.initials: MK
authors.lastname: Joo
authors.forename: Byeongmoon
authors.initials: B
authors.lastname: Jeong
mesh_terms: D001672:Biocompatible Materials / Q000737:chemistry; D002725:Chloroform / Q000737:chemistry*; D005782:Gels / Q000737:chemistry*; D008422:Materials Testing; D008958:Models, Molecular; D010455:Peptides / Q000737:chemistry*; D011092:Polyethylene Glycols / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D013314:Stress, Mechanical; D013696:Temperature
chemical_list: D001672:Biocompatible Materials; D005782:Gels; D010455:Peptides; D011108:Polymers; D011092:Polyethylene Glycols; D002725:Chloroform