Hydrogen bonding induced vesicular morphologies in diblock copolymer complexes

Salim, Nisa and Guo, Qipeng 2011, Hydrogen bonding induced vesicular morphologies in diblock copolymer complexes, in ISACS6 2011 : Proceedings of the International Symposia on Advancing the Chemical Sciences : Challenges in Organic Materials and Supramolecular Chemistry, Royal Society of Chemistry, [Beijing, China], pp. 29-29.

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Title Hydrogen bonding induced vesicular morphologies in diblock copolymer complexes
Author(s) Salim, Nisa
Guo, Qipeng
Conference name International Symposia on Advancing the Chemical Sciences (2011 : Beijing, China)
Conference location Beijing, China
Conference dates 2-5 Sep. 2011
Title of proceedings ISACS6 2011 : Proceedings of the International Symposia on Advancing the Chemical Sciences : Challenges in Organic Materials and Supramolecular Chemistry
Editor(s) [Unknown]
Publication date 2011
Conference series International Symposia on Advancing the Chemical Sciences
Start page 29
End page 29
Publisher Royal Society of Chemistry
Place of publication [Beijing, China]
Keyword(s) block copolymers
hydrogen bonding
Summary It is well-known that the self-assembly of block copolymers either in water or in organic solvents can form a wide range of morphologies in nanometer dimensions depending on its chemical nature. In the present study, the complexation and aggregate morphologies in 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) in water were studied using transmission electron microscopy (TEM), small angle X-ray scattering (SAXS), and dynamic light scattering (DLS). By varying the relative amounts of the two block copolymers, a variety of bilayer aggregates were formed, including vesicles, multilamellar vesicles (MLVs), thick-walled vesicles (TWVs), interconnected compound vesicles (ICCVs), and irregular aggregates. The hydrophobic PS blocks were segregated as the cores while the hydrogen bonded PEO and PAA blocks formed the coronae of bilayer aggregates. We also investigate how the addition of PS-b-PEO into PS-b-PAA solutions influences the aggregate morphology of the resulting complexes. This work introduces a viable route to multicompartment vesicles in aqueous solutions. The formation of block copolymer vesicles in water is of particular interest because of their potential in various applications.
Language eng
Field of Research 091209 Polymers and Plastics
Socio Economic Objective 870303 Polymeric Materials (e.g. Paints)
HERDC Research category E3 Extract of paper
Persistent URL http://hdl.handle.net/10536/DRO/DU:30042286

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