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Spinodal decomposition of chemically fueled polymer solutions

Abstract

Out-of-equilibrium phase transitions driven by dissipation of chemical energy are a common mechanism for morphological organization and temporal programming in biology. Inspired by this, dissipative self-assembly utilizes chemical reaction networks (CRNs) that consume high-energy molecules (chemical fuels) to generate transient structures and functionality. While a wide range of chemical fuels and building blocks are now available for chemically fueled systems, so far little attention has been paid to the phase-separation process itself. Herein, we investigate the chemically fueled spinodal decomposition of poly(norbornene dicarboxylic acid) (PNDAc) solution, which is driven by a cyclic chemical reaction network. Our analysis encompasses both the molecular level in terms of the CRN, but also the phase separation process. We investigate the morphology of formed domains, as well as the kinetics and mechanism of domain growth, and develop a kinetic/thermodynamic hybrid model to rationalize the dependence of the system on fuel concentration and pH.

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Supplementary files

Article information


Submitted
06 Apr 2021
Accepted
03 May 2021
First published
04 May 2021

Soft Matter, 2021, Accepted Manuscript
Article type
Paper

Spinodal decomposition of chemically fueled polymer solutions

J. Heckel, F. Batti, R. T. Mathers and A. Walther, Soft Matter, 2021, Accepted Manuscript , DOI: 10.1039/D1SM00515D

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