Multiple vesicular morphologies in AB/AC diblock copolymer complexes through hydrogen bonding interactions

Salim, Nisa V. and Guo, Qipeng 2011, Multiple vesicular morphologies in AB/AC diblock copolymer complexes through hydrogen bonding interactions, Journal of physical chemistry b, vol. 115, no. 31, pp. 9528-9536.

Attached Files
Name Description MIMEType Size Downloads

Title Multiple vesicular morphologies in AB/AC diblock copolymer complexes through hydrogen bonding interactions
Author(s) Salim, Nisa V.
Guo, Qipeng
Journal name Journal of physical chemistry b
Volume number 115
Issue number 31
Start page 9528
End page 9536
Publisher American Chemical Society
Place of publication Washington, D. C.
Publication date 2011
ISSN 1520-6106
1520-5207
Summary We report for the first time multiple vesicular morphologies in block copolymer complexes formed in aqueous media via hydrogen bonding interactions. A model AB/AC diblock copolymer system consisting of polystyrene-block- poly(acrylic acid) (PS-b-PAA) and polystyrene-block-poly(ethylene oxide) (PS-b-PEO) was examined using transmission electron microscopy, small-angle X-ray scattering, and dynamic light scattering. The complexation and morphological transitions were driven by the hydrogen bonding between the complementary binding sites on PAA and PEO blocks of the two diblock copolymers. Upon the addition of PS-b-PEO, a variety of bilayer aggregates were formed in PS-b-PAA/PS-b-PEO complexes including vesicles, multilamellar vesicles (MLVs), thick-walled vesicles (TWVs), interconnected compound vesicles (ICCVs), and irregular aggregates. Among these aggregates, ICCVs were observed as a new morphology. The morphology of aggregates was correlated with respect to the molar ratio of PEO to PAA. At [EO]/[AA] = 0.5, vesicles were observed, while MLVs were obtained at [EO]/[AA] = 1. TWVs and ICCVs were formed at [EO]/[AA] = 2 and 6, respectively. When [EO]/[AA] reached 8 and above, only irregular aggregates appeared. These findings suggest that complexation between two amphiphilic diblock copolymers is a viable approach to prepare polymer vesicles in aqueous media.
Language eng
Field of Research 091209 Polymers and Plastics
Socio Economic Objective 870303 Polymeric Materials (e.g. Paints)
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2011, American Chemical Society
Persistent URL http://hdl.handle.net/10536/DRO/DU:30040377

Connect to link resolver
 
Unless expressly stated otherwise, the copyright for items in DRO is owned by the author, with all rights reserved.

Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 7 times in TR Web of Science
Scopus Citation Count Cited 7 times in Scopus
Google Scholar Search Google Scholar
Access Statistics: 45 Abstract Views, 1 File Downloads  -  Detailed Statistics
Created: Mon, 05 Dec 2011, 12:33:38 EST

Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.