Preparation of cation exchange filament for 3D membrane print. Issue 8 (9th July 2020)

• Record Type: Journal Article
• Authors: Zarybnicka, Lucie; Stranska, Eliska
• Is Part Of: Rapid prototyping journal. Volume 26:Issue 8(2020)
• Page Start: 1435
• Page End: 1445
• Publication Date: 2020-07-09
• Subjects: FDM -- Polypropylene -- Extrusion -- 3D print -- Cation exchange filament; Engineering design -- Periodicals; 620.004205
• DOI: 10.1108/RPJ-03-2019-0082
• Languages: English
• ISSNs: 1355-2546

Abstract

Abstract : 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 Ocm 2 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.