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Issue 21, 2013
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Lamellar–micelle transition in a hydrogel induced by polyethylene glycol grafting

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Abstract

We demonstrate, for the first time, a distinct change of the bulk properties of a hydrogel based on the lamellar–micelle transition. The hydrogel consists of thousands of periodical stacks of bilayer membranes, poly(dodecyl glyceryl itaconate) (PDGI), inside a dilute polyacrylamide network. Along with a bright structure color, the hydrogel exhibits a strong anisotropy in its bulk properties. By grafting a short chain polymer lipid, poly(ethylene glycol) dodecyl ether (C12EO23), to the bilayer membrane, sharp changes in the structure color, swelling and modulus of the hydrogel are observed in a narrow C12EO23 concentration range. These changes are ascribed to the structure transition of the single domain lamellar phase to the multi-domain micelle phase of PDGI, induced by the excluded volume effect of two dimensionally grafted poly(ethylene glycols) (PEG). By controlling the water permeable nano-channels formed during the structure transition, a specific molecular diffusion and recognition are demonstrated. This lamellar bilayer hydrogel could be a new insight into the lipid bilayer system to investigate the nature of biological membranes by the bulk behaviors of hydrogels.

Graphical abstract: Lamellar–micelle transition in a hydrogel induced by polyethylene glycol grafting

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Publication details

The article was received on 22 Feb 2013, accepted on 22 Mar 2013 and first published on 25 Apr 2013


Article type: Paper
DOI: 10.1039/C3SM50544H
Citation: Soft Matter, 2013,9, 5223-5230
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    Lamellar–micelle transition in a hydrogel induced by polyethylene glycol grafting

    Md. A. Haque, T. Kurokawa and J. P. Gong, Soft Matter, 2013, 9, 5223
    DOI: 10.1039/C3SM50544H

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