Self-Assembling Nanomembranes Through Electrostatic Melt Processing of Copolymer Films

Wetzel, Eric D.; Beyer, Frederick L.

doi:10.21236/ada406016

Cited by 1 publication

(1 citation statement)

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“…A central goal of polymer chemistry is the design of materials with novel macroscopic properties by controlling the spontaneous generation of nanoscaled, phase separated networks [1,2]. A primary mechanism to generate such networks is through the "functionalization" of hydrophobic polymer chains by the addition of acid terminated side-chains, such as in the casting of perfluorosulfonic acid (PFSA) membranes, see Figure 1.…”

Section: Introductionmentioning

confidence: 99%

Variational Models of Network Formation and Ion Transport: Applications to Perfluorosulfonate Ionomer Membranes

Gavish

Jones

et al. 2012

Polymers

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We present the functionalized Cahn-Hilliard (FCH) energy, a continuum characterization of interfacial energy whose minimizers describe the network morphology of solvated functionalized polymer membranes. With a small set of parameters the FCH characterizes bilayer, pore-like, and micelle network structures. The gradient flows derived from the FCH describe the interactions between these structures, including the merging and pinch-off of endcaps and formation of junctions central to the generation of network morphologies. We couple the FCH gradient flow to a model of ionic transport which incorporates entropic effects to localize counter-ions, yielding a flow which dissipates a total free energy, and an expression for the excess electrochemical potential which combines electrostatic and entropic effects. We present applications to network bifurcation and membrane casting.

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Section: Introductionmentioning

confidence: 99%