Overlimiting convection at a heterogeneous cation-exchange membrane studied by particle image velocimetry

Purpose The study aims to focus on the preparation of a heterogeneous cation exchange membrane by a three-dimensional (3D) method – fused filament fabrication using a series of nozzles of various diameters (0.4–1.0 mm). Polypropylene random copolymer (PPR) as a polymeric binder was mixed with 50 Wt.% of the selected conventional cation exchange resin, and a filament was prepared using a single screw mini extruder. Then filament was processed by FFF into the membranes with a defined 3D structure. Design/methodology/approach Electrochemical properties, morphology, mechanical properties and water absorption properties were tested. Findings Dependence of the tested properties on the used nozzle diameter was found. Both areal and specific resistances increased with increasing nozzle diameter. The same trend was also found for permselectivity. The optimal membrane with permselectivity above 90%, areal resistance of 8 O.cm2 and specific resistance of 124 O.cm2 was created using a nozzle diameter of 0.4 mm. Originality/value Using new materials for 3D print of cation exchange membrane with production without waste. The possibility of producing 3D membranes with a precisely defined structure and using a cheap 3D printing method. New direction of membrane structure formation. 3D-printed heterogeneous cation exchange membranes were prepared, which can compete with commercial membranes produced by conventional technologies. 3D-printed heterogeneous cation exchange membranes were prepared, which can compete with commercial membranes produced by conventional technologies.

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Preparation and Desalination Characteristics of Highly Durable Heterogeneous Cation-exchange Membrane Based on Polyvinylidene Fluoride (PVDF) by Casting Method for Electrodialysis

Membrane Journal ◽

10.14579/membrane_journal.2016.26.2.97 ◽

2016 ◽

Vol 26 (2) ◽

pp. 97-107

Author(s):

Dae Young Ko ◽

◽

In Sik Kim ◽

Taek Sung Hwang

Keyword(s):

Cation Exchange ◽

Polyvinylidene Fluoride ◽

Cation Exchange Membrane ◽

Casting Method ◽

Heterogeneous Cation Exchange Membrane ◽

Exchange Membrane

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Particle Image Velocimetry Measurements in a Model Proton Exchange Membrane Fuel Cell

Journal of Fuel Cell Science and Technology ◽

10.1115/1.2744053 ◽

2006 ◽

Vol 4 (3) ◽

pp. 328-335 ◽

Cited By ~ 10

Author(s):

J. P. Feser ◽

A. K. Prasad ◽

S. G. Advani

Keyword(s):

Particle Image Velocimetry ◽

Fuel Cell ◽

Proton Exchange Membrane ◽

Particle Image ◽

Pem Fuel Cell ◽

Flow Fields ◽

Proton Exchange ◽

Flow Channels ◽

Image Velocimetry ◽

Exchange Membrane

Particle image velocimetry was used to measure 2D velocity fields in representative regions of interest within flow channels of interdigitated and single-serpentine proton exchange membrane (PEM) fuel cell models. The model dimensions, gas diffusion layer (GDL) permeability, working fluid, and flow rates were selected to be geometrically and dynamically similar to the cathode-side airflow in a typical PEM fuel cell. The model was easily reconfigurable between parallel, single-serpentine, and interdigitated flow fields, and was constructed from transparent materials to enable optical imaging. Velocity maps were obtained of both the primary and secondary flow within the channels. Measurements of the secondary flows in interdigitated and single-serpentine flow fields indicate that significant portions of the flow travel between adjacent channels through the porous medium. Such convective bypass can enhance fuel cell performance by supplying fresh reactant to the lands regions and also by driving out product water from under the lands to the flow channels.

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