Unique aqueous self-assembly behavior of a thermoresponsive diblock copolymer

Sarah J. Byard, Cate T. O'brien, Matthew J. Derry, Mark Williams, Oleksandr O. Mykhaylyk, Adam Blanazs, Steven P. Armes

Research output: Contribution to journalArticle

Abstract

It is well-recognized that block copolymer self-assembly in solution typically produces spheres, worms or vesicles, with the relative volume fraction of each block dictating the copolymer morphology. Stimulus-responsive diblock copolymers that can undergo either sphere/worm or vesicle/worm transitions are also well-documented. Herein we report a new amphiphilic diblock copolymer that can form spheres, worms, vesicles or lamellae in aqueous solution. Such self-assembly behavior is unprecedented for a single diblock copolymer of fixed composition yet is achieved simply by raising the solution temperature from 1 °C (spheres) to 25 °C (worms) to 50 °C (vesicles) to 70 °C (lamellae). Heating increases the degree of hydration (and hence the effective volume fraction) of the core-forming block, with this parameter being solely responsible for driving the sphere-to-worm, worm-to-vesicle and vesicle-to-lamellae transitions. The first two transitions exhibit excellent reversibility but the vesicle-to-lamellae transition exhibits hysteresis on cooling. This new thermoresponsive diblock copolymer provides a useful model for studying such morphological transitions and is likely to be of significant interest for theoretical studies.
Original languageEnglish
Pages (from-to)396-402
Number of pages7
JournalChemical Science
Volume11
Issue number2
Early online date12 Nov 2019
DOIs
Publication statusPublished - 1 Jan 2020

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Self assembly
Block copolymers
Volume fraction
Hydration
Hysteresis
Copolymers
Cooling
Heating
Chemical analysis
Temperature

Bibliographical note

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.

Cite this

Byard, S. J., O'brien, C. T., Derry, M. J., Williams, M., Mykhaylyk, O. O., Blanazs, A., & Armes, S. P. (2020). Unique aqueous self-assembly behavior of a thermoresponsive diblock copolymer. Chemical Science, 11(2), 396-402. https://doi.org/10.1039/C9SC04197D
Byard, Sarah J. ; O'brien, Cate T. ; Derry, Matthew J. ; Williams, Mark ; Mykhaylyk, Oleksandr O. ; Blanazs, Adam ; Armes, Steven P. / Unique aqueous self-assembly behavior of a thermoresponsive diblock copolymer. In: Chemical Science. 2020 ; Vol. 11, No. 2. pp. 396-402.
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Byard, SJ, O'brien, CT, Derry, MJ, Williams, M, Mykhaylyk, OO, Blanazs, A & Armes, SP 2020, 'Unique aqueous self-assembly behavior of a thermoresponsive diblock copolymer', Chemical Science, vol. 11, no. 2, pp. 396-402. https://doi.org/10.1039/C9SC04197D

Unique aqueous self-assembly behavior of a thermoresponsive diblock copolymer. / Byard, Sarah J.; O'brien, Cate T.; Derry, Matthew J.; Williams, Mark; Mykhaylyk, Oleksandr O.; Blanazs, Adam; Armes, Steven P.

In: Chemical Science, Vol. 11, No. 2, 01.01.2020, p. 396-402.

Research output: Contribution to journalArticle

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Byard SJ, O'brien CT, Derry MJ, Williams M, Mykhaylyk OO, Blanazs A et al. Unique aqueous self-assembly behavior of a thermoresponsive diblock copolymer. Chemical Science. 2020 Jan 1;11(2):396-402. https://doi.org/10.1039/C9SC04197D