Nanofibrillar micelles and entrapped vesicles from biodegradable block copolymer/polyelectrolyte complexes in aqueous media

Salim, Nisa V., Hameed, Nishar, Hanley, Tracey L., Waddington, Lynne J., Hartley, Patrick G. and Guo, Qipeng 2013, Nanofibrillar micelles and entrapped vesicles from biodegradable block copolymer/polyelectrolyte complexes in aqueous media, Langmuir, vol. 29, no. 29, pp. 9240-9248.

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Title Nanofibrillar micelles and entrapped vesicles from biodegradable block copolymer/polyelectrolyte complexes in aqueous media
Author(s) Salim, Nisa V.
Hameed, Nishar
Hanley, Tracey L.
Waddington, Lynne J.
Hartley, Patrick G.
Guo, Qipeng
Journal name Langmuir
Volume number 29
Issue number 29
Start page 9240
End page 9248
Total pages 9
Publisher American Chemical Society
Place of publication Washington, D.C.
Publication date 2013
ISSN 0743-7463
1520-5827
Summary Here we report a viable route to fibrillar micelles and entrapped vesicles in aqueous solutions. Nanofibrillar micelles and entrapped vesicles were prepared from complexes of a biodegradable block copolymer poly(ethylene oxide)-block-poly(lactide) (PEO-b-PLA) and a polyelectrolyte poly(acrylic acid) (PAA) in aqueous media and directly visualized using cryogenic transmission electron microscopy (cryo-TEM). The self-assembly and the morphological changes in the complexes were induced by the addition of PAA/water solution into the PEO-b-PLA in tetrahydrofuran followed by dialysis against water. A variety of morphologies including spherical wormlike and fibrillar micelles, and both unilamellar and entrapped vesicles, were observed, depending on the composition, complementary binding sites of PAA and PEO, and the change in the interfacial energy. Increasing the water content in each [AA]/[EO] ratio led to a morphological transition from spheres to vesicles, displaying both the composition- and dilution-dependent micellar-to-vesicular morphological transitions.
Language eng
Field of Research 099999 Engineering not elsewhere classified
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2013, American Chemical Society
Persistent URL http://hdl.handle.net/10536/DRO/DU:30057635

Document type: Journal Article
Collection: Institute for Frontier Materials
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