Effect of poly(ether block amide)‐graphene/<scp>ZnO</scp> membranes in mixed gas separation performance

Mendoza‐Mendoza, Esmeralda; España‐Sánchez, Beatriz Liliana; Montes‐Luna, Ángel de Jesús; León, Griselda Castruita‐de

doi:10.1002/app.53453

Cited by 2 publications

(1 citation statement)

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“…The high degree of combinatoriality in the preparation of block copolymers makes it possible to obtain a large number of commercially available polymers with different compositions and properties [ 76 ]. To improve the transport properties, PEBA-based membranes are modified with various particles such as ZnO [ 77 , 78 ], chitosan-wrapped multiwalled carbon nanotubes (CWNTs) [ 79 ], graphene [ 80 ], Aminosilane-Functionalized Zeolite Y [ 66 ], modified multi-walled carbon nanotubes (MWCNTs) [ 81 ], polyethylene glycol (PEG-400) and TiO 2 [ 82 ], covalent organic frameworks (COFs) [ 83 ], MOFs [ 84 , 85 , 86 , 87 ], etc. Particular attention should be paid to MOFs due to their unique characteristics; however, PEBA/MOF membranes are developed mainly for diffusion membrane processes (pervaporation [ 84 , 85 ] and gas separation [ 86 , 87 ]).…”

Section: Introductionmentioning

confidence: 99%

Holmium-Containing Metal-Organic Frameworks as Modifiers for PEBA-Based Membranes

Kuzminova,

Dmitrenko,

Salomatin

et al. 2023

Polymers

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Recently, there has been an active search for new modifiers to create hybrid polymeric materials for various applications, in particular, membrane technology. One of the topical modifiers is metal-organic frameworks (MOFs), which can significantly alter the characteristics of obtained mixed matrix membranes (MMMs). In this work, new holmium-based MOFs (Ho-MOFs) were synthesized for polyether block amide (PEBA) modification to develop novel MMMs with improved properties. The study of Ho-MOFs, polymers and membranes was carried out by methods of X-ray phase analysis, scanning electron and atomic force microscopies, Fourier transform infrared spectroscopy, low-temperature nitrogen adsorption, dynamic and kinematic viscosity, static and dynamic light scattering, gel permeation chromatography, thermogravimetric analysis and contact angle measurements. Synthesized Ho-MOFs had different X-ray structures, particle forms and sizes depending on the ligand used. To study the effect of Ho-MOF modifier on membrane transport properties, PEBA/Ho-MOFs membrane retention capacity was evaluated in vacuum fourth-stage filtration for dye removal (Congo Red, Fuchsin, Glycine thymol blue, Methylene blue, Eriochrome Black T). Modified membranes demonstrated improved flux and rejection coefficients for dyes containing amino groups: Congo Red, Fuchsin (PEBA/Ho-1,3,5-H3btc membrane possessed optimal properties: 81% and 68% rejection coefficients for Congo Red and Fuchsin filtration, respectively, and 0.7 L/(m2s) flux).

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