Influence of the interfacial adsorptions on the imbibition of aqueous solutions of low concentration of the non-ionic surfactant Triton X-100 into calcium fluoride porous medium

Labajos-Broncano, L.; Antequera-Barroso, J.A.; González-Martı́n, M.L.; Bruque, J.M.

doi:10.1016/j.jcis.2005.08.027

Cited by 4 publications

(1 citation statement)

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“…It reduces the use of expensive ionomers while holding the proton conductivity steady, and improves the mechanical properties due to certain interactions at the matrix–reinforcement interface, e.g., ionic cross‐inking, hydrogen bonding, and an internal scaffolding effect. [ 2 ] In addition, this renders the hydrophilic domain volume less susceptible to changes in the hydration level, which has added benefits in terms of the durability of the membrane electrode assembly (MEA) performance in fuel cell devices which operate under various conditions.…”

Section: Introductionmentioning

confidence: 99%

Single‐Step Fabrication of Polymeric Composite Membrane via Centrifugal Colloidal Casting for Fuel Cell Applications

Yoon

Lim

et al. 2021

Small Methods

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Recent interest in polymer electrolyte membranes (PEMs) for fuel cell systems has spurred the development of infiltration technology by which to insert ionomers into mechanically robust reinforcement structures by solution casting in order to produce a cost effective and highly efficient electrolyte. However, the results of the fabrication process often continue to present challenges related to the structural complexity and self‐assembly dynamics between the hydrophobic and hydrophilic parts of the constituents which in turn, necessitates additional processing steps and increases production costs. Here, a single‐step process is reported for highly compact polymeric composite membranes (PCMs), fabricated using a centrifugal colloidal casting (C3) method. Combined structural analyses as well as coarse‐grained molecular dynamics simulations are employed to determine the micro‐/macroscopic structural characteristics of the fabricated PCMs. These findings indicate that the C3 method is capable of forming highly dense ionomer matrix–reinforcement composites consisting of microphase‐separated ionomer structures with tailored crystallinity and ionic cluster sizes. An outcome that is very unlikely with the single‐step coating steps in conventional methods. These structural attributes ensure PCMs with better proton conductivity, greater strain stability, and lower gas crossover properties compared to commercial pristine membranes, expanding their possible range of applicability to PEMs.

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Section: Introductionmentioning

confidence: 99%