Self-assembled multimicellar vesicles via complexation of a rigid conjugated polymer with an amphiphilic block copolymer
RSC Advances, ISSN: 2046-2069, Vol: 4, Issue: 97, Page: 54752-54759
2014
- 7Citations
- 6Captures
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Article Description
A viable method of encapsulating block copolymer micelles inside vesicles using a conjugated polymer is reported in this study. Self-assembly and complexation between an amphiphilic block copolymer poly(methyl methacrylate)-b-poly(acrylic acid) (PMMA-b-PAA) and a rod-like conjugated polymer polyaniline (PANI) in aqueous solution were studied using transmission electron microscopy, atomic force microscopy and dynamic light scattering. The complexation and morphology transformation were driven by electrostatic interaction between PANI and the PAA block of the block copolymer. Addition of PANI to PMMA-b-PAA induced the morphology transformation from micelles to irregular vesicles through vesicles, thick-walled vesicles (TWVs) and multimicellar vesicles (MMVs). Among the observed morphologies, MMVs were observed for the first time. Morphology transformation was studied as a function of aniline/acrylic acid molar ratio ([ANI]/[AA]). Micelles were observed for the pure block copolymer, while vesicles and TWVs were observed at [ANI]/[AA] = 0.1 and 0.3, respectively. MMVs were observed at [ANI]/[AA] = 0.5 and irregular vesicles were observed for molar ratios at 0.7 and above. Clearly, a conjugated polymer like polyaniline can induce a morphology transformation even at its lower concentrations and produce complex morphologies.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84908508063&origin=inward; http://dx.doi.org/10.1039/c4ra09061f; http://xlink.rsc.org/?DOI=C4RA09061F; http://pubs.rsc.org/en/content/articlepdf/2014/RA/C4RA09061F; https://xlink.rsc.org/?DOI=C4RA09061F; https://dx.doi.org/10.1039/c4ra09061f; https://pubs.rsc.org/en/content/articlelanding/2014/ra/c4ra09061f
Royal Society of Chemistry (RSC)
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