Relationships between transport and physical–mechanical properties of ion exchange membranes

Stránská, Eliška

doi:10.1080/19443994.2014.981413

Cited by 10 publications

(8 citation statements)

References 13 publications

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“…3.1 Preparation of cation exchange granulates and filaments First, eight types of granulate samples with different fillings of cation exchanger were made. Cation exchanger Purolite C120ELT and HCR-S/S with was used and PP granulate Tipplen R959A was used as a binder to prepare a cation exchange granulate because this combination is commonly used in the manufacture of membranes using conventional techniques (Stranska, 2015;Str ansk a et al,2018). The filling of cation exchanger range 5-65 Wt.% was chosen to find the maximum filling capability within the range of corresponding electrochemical, mechanical properties for the use of membrane preparation by 3D printing.…”

Section: Resultsmentioning

confidence: 99%

“…From Table 5, it can be seen that increasing the content of cation exchanger increases the water absorption of the material. The water content increases with increasing ion exchange resin content because the ion exchange resin contains hydrophilic fixed functional groups which cause swelling of the structure (Stranska, 2015). PP matrix itself has an absorption of 0.061 Wt.%.…”

Section: Characterization Of Cation Exchange Granulates and Filamentsmentioning

confidence: 99%

“…These are commonly used strongly acidic cation exchangers with DVB. HCR is a widely used type, Purolite is a less crosslinked type that is suitable for increasing swelling and resistance reduction (Stranska, 2015). PP Tipplen R959A was used as a binder.…”

Section: Introductionmentioning

confidence: 99%

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Preparation of cation exchange filament for 3D membrane print

Zárybnická

Stránská

2020

RPJ

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Purpose This paper aims to focus on the preparation of a cation exchange filament for three-dimensional (3D) fused deposition modeling (FDM). The polymeric binder was mixed with the selected conventional cation exchange resin and a filament was prepared using a mini extruder. Filaments were tested by mechanical properties, chemical properties, quality and melt flow index. Samples were prepared from granulate using a press, which were tested for electrochemical properties, thermal properties. The best result of ion exchange capacity (IEC) up to 3.0 meq/g of the dry matter was achieved with filament fill 65%. Permselectivity results above 90% were determined for 55%–65% filling of the cation exchanger. The results obtained are a promising step for the preparation of 3D printed cation exchange membranes (CEMs) with a defined structure. Design/methodology/approach The prepared granulates and filaments were evaluated using mechanical, rheological and thermal properties. Findings The prepared cation exchange filament can be used for the 3D printing process. The best result of IEC up to 3.0 meq/g of the dry matter was achieved with filament fill 65%. Permselectivity results above 90% were determined for 55%–65% filling of the cation exchanger, and area resistances 3.0 Ocm2 and specific resistances around 57 Ocm for 65% filling of the cation exchanger. The results obtained are a promising step for the preparation of 3D printed CEMs with a defined structure. Originality/value The prepared cation exchange filament. Using new materials for 3D print of cation exchange membrane. Production without waste. The possibility of producing 3D membranes with a precisely defined structure. Processing prepared filaments using a cheap FDM 3D printing method. New direction of membrane formation.

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Section: Resultsmentioning

confidence: 99%

Section: Characterization Of Cation Exchange Granulates and Filamentsmentioning

confidence: 99%

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Preparation of cation exchange filament for 3D membrane print

Zárybnická

Stránská

2020

RPJ

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“…Preparation of CEMs and used materials was described in the literature [30]. CEMs were prepared in several processing steps.…”

Section: Methodsmentioning

confidence: 99%

“…Electrochemical, physical and mechanical properties of IEMs compared to different reinforcing fabric were studied. Measurements of permselectivity, specific and areal resistivity, relative water content (rwc) with other physical properties (relative change of thickness, length and width after swelling in demineralized water) are published in the literature [30]. Mechanical properties are described by Stránská et al.…”

Section: Methodsmentioning

confidence: 99%

Reinforcing fabrics as the mechanical support of ion exchange membranes

Stránská

Nugent

2017

Journal of Industrial Textiles

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Mechanical, physical and electrochemical characteristics are one of the important properties of ion exchange membranes. These parameters are required for a next operation and for an application in an electrodialysis (as tightness of a stack, energy consumption, capacity of electrodialysis). The goal of this article is comparison of the influence of the different reinforcing fabric on the properties of ion exchange membranes. Six types of ion exchange membranes with the nonwoven fabric, the monofilament knit, the multifilament knit, the monofilament woven fabric, the multifilament woven fabric, and for comparison non-reinforcing ion exchange membranes were chosen. The most important properties of a fabric in this application are thickness, free area related to the warp and the weft, mechanical strength, the material (shrinkage), type of fabric (plain or twill weave, a knit, monofilament, multifilament) and of course price. Electrochemical, physical and mechanical properties of ion exchange membranes were studied. Non-reinforcing ion exchange membranes have lower mechanical strength, but the best elongation. These ion exchange membranes report big relative dimension changes after swelling in demineralized water and the lowest value of the areal resistance. The most appropriate ion exchange membrane is with woven fabric from monofilaments after comparison with other ion exchange membranes in terms of the quality of the lamination and other electrochemical, physical and mechanical parameters.

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