Characterization of Selected Parameters of Organic-Inorganic Hybrid Membranes Based on Various Polymers and Nd-Fe-B Fillers

Abstract

In this paper magnetic organic-inorganic hybrid membranes based on EC, PPO polymer matrices and various magnetic powder microparticles were synthesized and studied. Constant pressure permeation technique and the Time Lag method were used to obtain the gas transport coefficients. The mechanical, rheological and magnetic parameters of magnetic hybrid membranes were examined. It was found that their separation and gas transport properties (D, P, S and α) were improved with the decrease in powder particle size and the increase of membrane’s remanence, saturation magnetization and magnetic particle filling. The increase of the magnetic powder addition and a decrease of its granulation improved also mechanical and rheological parameters of the tested membranes. This improvement also had a positive effect on their gas separation properties and their potential usage in the future.

Applicability of Composite Magnetic Membranes in Separation Processes of Gaseous and Liquid Mixtures—A Review

“…Membranes with magnetic properties have been used to separate oxygen/nitrogen [13][14][15][16][17][18][19][20], carbon dioxide/nitrogen [21][22][23][24], helium/carbon dioxide [25] and carbon dioxide/methane mixtures [23,26]. The magnetic properties of membrane filler and/or additionally applied an external magnetic field impact the separation of gaseous mixtures due to the different magnetic properties of their components as shown in Figure 1.…”

“…Raveshiyan et al [9] observed the highest saturation magnetisation value (23 em•g −1 ) for a polysulfone (PSf) membrane modified with 10 wt% carbonyl iron powder. On the other hand, hard magnets have a high coercivity, which makes it difficult to magnetise and demagnetise them [14,17,18,30,33,34]. For this reason, placing the membranes loaded with hard magnets in an external magnetic field is unnecessary to obtain advantageous separation results.…”

Methods of Ensuring Energy Security with the Use of Hard Coal—The Case of Poland

“…Additionally, the membranes must be stable and adapted to the conditions of the fuel combustion process. Therefore, the authors proposed using hybrid membranes, also called mixed matrix membranes (MMMs) [94][95][96]. Hybrid membranes allow us to take advantage of a polymer matrix and inorganic additives.…”

Influence of Particle Size on the Performance of Polysulfone Magnetic Membranes for O2/N2 Separation

“…There are few scientific reports about O 2 /N 2 separation using magnetic MMMs, which demonstrate that the incorporation of magnetic particles into the membrane matrix improved its separation performance [22,[25][26][27][28][29][30][31][32][33][34]. With respect to the results published by Rybak research group, praseodymium and neodymium incorporation successfully enhanced the O 2 /N 2 separation performance of polymeric membranes like ethyl cellulose (EC), poly(2,6-dimethyl-1,4-phenylene oxide) (PPO), and linear polyimide (LPI) or hyperbranched polyimide (HBPI) [27,30,31].…”

“…The performance of magnetic membrane separation is affected by the magnetic property and size of the particles and the intensity of interactions between the gas molecules and magnetic channels. In several studies accomplished by the Rybak research group 25–31, 33, 35, magnetic MMMs were fabricated from praseodymium and neodymium magnetic particles. They investigated the particle size effect on the O 2 /N 2 separation; however, they did not study the effects of dispersion and arrangement of magnetic particles on the structure and magnetic properties of magnetic MMMs.…”