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Decoupling the Effects of Charge Density and Hydrophobicity on the Phase Behavior and Viscoelasticity of Complex Coacervates
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DOI：10.1021/acs.macromol.4c00247.png)
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Abstract
En 中文
Here, we explore the effect of copolymer chemistry on the phase behavior and viscoelasticity of complex coacervates. To this end, we utilized a library of methacrylate copolymers with varying charge densities and hydrophobicity. Our results show that changing the charge density and hydrophobicity drastically affects the phase behavior & horbar;with charge density dictating the salt stability and hydrophobicity controlling the polymer concentration of the coacervates. Small-amplitude oscillatory shear measurements were used to study the viscoelastic response of the coacervates, leveraging knowledge of the coacervate phase behavior in tandem with time-salt superposition to construct a series of time-salt-copolymer master curves that highlight the effects of polymer charge density and hydrophobicity. These combined data show evidence of charge-dominated and hydrophobicity-dominated regimes, allowing for an understanding of how copolymer chemistry can be used to tune the mechanical properties of complex coacervates.
Keywords:
CRITICAL SOLUTION TEMPERATURE
LINEAR VISCOELASTICITY
AQUEOUS-SOLUTIONS
MOLECULAR-WEIGHT
SALT
STRENGTH
WATER
TRANSITION
HYDRATION
RHEOLOGY
Journal
IF:
5.2
Papers:
3.6W
Citations:
9.4W