Micellar shape change and internal segregation induced by chemical modification of a tryptych block copolymer surfactant

Zhilian Zhou; Zhibo Li; Yu Ren; Marc A. Hillmyer; Timothy P. Lodge

doi:10.1021/ja036551h

Micellar shape change and internal segregation induced by chemical modification of a tryptych block copolymer surfactant

Zhilian Zhou, Zhibo Li, Yu Ren, Marc A. Hillmyer, Timothy P. Lodge

Chemistry (Twin Cities)

Research output: Contribution to journal › Article › peer-review

182 Scopus citations

Abstract

We report the detailed characterization of micelles formed by two nonionic, amphiphilic ABC triblock copolymers. Poly(ethylene oxide)-b-poly(styrene)-b-1,2-poly(butadiene) (PEO-b-PS-b-PB) triblock copolymer "OSB" forms core-corona spherical micelles in aqueous solution, and the two hydrophobic blocks S and B are mixed homogeneously within the micelle core. PEO-b-PS-b-PB:C₆F₁₃I triblock copolymer "OSF" was prepared by selective fluorination of the B block in OSB with n-perfluorohexyl iodide. Fluorination of the B block induces internal segregation into an inner F core and an intermediate S shell. Furthermore, the strong incompatibility that results from fluorination drives a shape change into an oblate ellipsoid. These micellar morphologies are confirmed by combined light, neutron, and X-ray scattering measurements, as well as TEM imaging.

Original language	English (US)
Pages (from-to)	10182-10183
Number of pages	2
Journal	Journal of the American Chemical Society
Volume	125
Issue number	34
DOIs	https://doi.org/10.1021/ja036551h
State	Published - Aug 27 2003

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title = "Micellar shape change and internal segregation induced by chemical modification of a tryptych block copolymer surfactant",

abstract = "We report the detailed characterization of micelles formed by two nonionic, amphiphilic ABC triblock copolymers. Poly(ethylene oxide)-b-poly(styrene)-b-1,2-poly(butadiene) (PEO-b-PS-b-PB) triblock copolymer {"}OSB{"} forms core-corona spherical micelles in aqueous solution, and the two hydrophobic blocks S and B are mixed homogeneously within the micelle core. PEO-b-PS-b-PB:C6F13I triblock copolymer {"}OSF{"} was prepared by selective fluorination of the B block in OSB with n-perfluorohexyl iodide. Fluorination of the B block induces internal segregation into an inner F core and an intermediate S shell. Furthermore, the strong incompatibility that results from fluorination drives a shape change into an oblate ellipsoid. These micellar morphologies are confirmed by combined light, neutron, and X-ray scattering measurements, as well as TEM imaging.",

author = "Zhilian Zhou and Zhibo Li and Yu Ren and Hillmyer, {Marc A.} and Lodge, {Timothy P.}",

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T1 - Micellar shape change and internal segregation induced by chemical modification of a tryptych block copolymer surfactant

AU - Zhou, Zhilian

AU - Li, Zhibo

AU - Ren, Yu

AU - Hillmyer, Marc A.

AU - Lodge, Timothy P.

PY - 2003/8/27

Y1 - 2003/8/27

N2 - We report the detailed characterization of micelles formed by two nonionic, amphiphilic ABC triblock copolymers. Poly(ethylene oxide)-b-poly(styrene)-b-1,2-poly(butadiene) (PEO-b-PS-b-PB) triblock copolymer "OSB" forms core-corona spherical micelles in aqueous solution, and the two hydrophobic blocks S and B are mixed homogeneously within the micelle core. PEO-b-PS-b-PB:C6F13I triblock copolymer "OSF" was prepared by selective fluorination of the B block in OSB with n-perfluorohexyl iodide. Fluorination of the B block induces internal segregation into an inner F core and an intermediate S shell. Furthermore, the strong incompatibility that results from fluorination drives a shape change into an oblate ellipsoid. These micellar morphologies are confirmed by combined light, neutron, and X-ray scattering measurements, as well as TEM imaging.

AB - We report the detailed characterization of micelles formed by two nonionic, amphiphilic ABC triblock copolymers. Poly(ethylene oxide)-b-poly(styrene)-b-1,2-poly(butadiene) (PEO-b-PS-b-PB) triblock copolymer "OSB" forms core-corona spherical micelles in aqueous solution, and the two hydrophobic blocks S and B are mixed homogeneously within the micelle core. PEO-b-PS-b-PB:C6F13I triblock copolymer "OSF" was prepared by selective fluorination of the B block in OSB with n-perfluorohexyl iodide. Fluorination of the B block induces internal segregation into an inner F core and an intermediate S shell. Furthermore, the strong incompatibility that results from fluorination drives a shape change into an oblate ellipsoid. These micellar morphologies are confirmed by combined light, neutron, and X-ray scattering measurements, as well as TEM imaging.

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Micellar shape change and internal segregation induced by chemical modification of a tryptych block copolymer surfactant

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