Reverse thermal organogels

Yuri Jeong; Min Kyung Joo; Youn Soo Sohn; Byeongmoon Jeong

doi:10.1002/adma.200700149

Reverse thermal organogels

Yuri Jeong, Min Kyung Joo, Youn Soo Sohn, Byeongmoon Jeong

Department of Chemistry & Nanoscience

Research output: Contribution to journal › Article › peer-review

26 Scopus citations

Abstract

The poly(ethylene glycol), poly(L-alanine-co-L-phenyl alanine) diblock copolymer (PEG-PAF), forming a free-flowing solution in chloroform at low temperature forms a gel as the temperature increases above 20°C. The transmission electron microscopy (TEM) image of the PEG-PAF developed in chloroform showed that spherical micelles with a size of 20-50 nm is packed together. The delicate balance between solvency and nonsolvency of a block copolymer might drive reverse thermal gelation in the solvent. This system expands the applications of organogels to sensors, media for electrochemistry carriers, and rheological modifiers, where the characteristics of low viscosity at low temperature and gel at high temperature are required.

Original language	English
Pages (from-to)	3947-3950
Number of pages	4
Journal	Advanced Materials
Volume	19
Issue number	22
DOIs	https://doi.org/10.1002/adma.200700149
State	Published - 19 Nov 2007

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title = "Reverse thermal organogels",

abstract = "The poly(ethylene glycol), poly(L-alanine-co-L-phenyl alanine) diblock copolymer (PEG-PAF), forming a free-flowing solution in chloroform at low temperature forms a gel as the temperature increases above 20°C. The transmission electron microscopy (TEM) image of the PEG-PAF developed in chloroform showed that spherical micelles with a size of 20-50 nm is packed together. The delicate balance between solvency and nonsolvency of a block copolymer might drive reverse thermal gelation in the solvent. This system expands the applications of organogels to sensors, media for electrochemistry carriers, and rheological modifiers, where the characteristics of low viscosity at low temperature and gel at high temperature are required.",

author = "Yuri Jeong and Joo, {Min Kyung} and Sohn, {Youn Soo} and Byeongmoon Jeong",

year = "2007",

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AU - Joo, Min Kyung

AU - Sohn, Youn Soo

AU - Jeong, Byeongmoon

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Y1 - 2007/11/19

N2 - The poly(ethylene glycol), poly(L-alanine-co-L-phenyl alanine) diblock copolymer (PEG-PAF), forming a free-flowing solution in chloroform at low temperature forms a gel as the temperature increases above 20°C. The transmission electron microscopy (TEM) image of the PEG-PAF developed in chloroform showed that spherical micelles with a size of 20-50 nm is packed together. The delicate balance between solvency and nonsolvency of a block copolymer might drive reverse thermal gelation in the solvent. This system expands the applications of organogels to sensors, media for electrochemistry carriers, and rheological modifiers, where the characteristics of low viscosity at low temperature and gel at high temperature are required.

AB - The poly(ethylene glycol), poly(L-alanine-co-L-phenyl alanine) diblock copolymer (PEG-PAF), forming a free-flowing solution in chloroform at low temperature forms a gel as the temperature increases above 20°C. The transmission electron microscopy (TEM) image of the PEG-PAF developed in chloroform showed that spherical micelles with a size of 20-50 nm is packed together. The delicate balance between solvency and nonsolvency of a block copolymer might drive reverse thermal gelation in the solvent. This system expands the applications of organogels to sensors, media for electrochemistry carriers, and rheological modifiers, where the characteristics of low viscosity at low temperature and gel at high temperature are required.

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Reverse thermal organogels

Abstract

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