Gas separation improvement of PES/PSF/PVP blend mixed matrix membranes inclusive of amorphous MOFs by O₂ plasma treatment

Abstract

In this study, crystalline UiO‐66 and NH2‐UiO‐66 metal organic frameworks (MOFs) were prepared by typical solvothermal method and then were transformed into amorphous phase by using ball milling process. The prepared MOFs were incorporated into tertiary polymer blend matrix including polyethersulfone/polysulfone/polyvinylpyrrollidone (PES/PSF/PVP:40/40/20 wt%) to examine gas separation performance of constructed mixed matrix membranes (MMMs). The synthesized MMMs were analyzed by FT‐IR, SEM, TGA, XRD, AFM, and DSC methods and also by pure gas permeation test for CO2 and CH4 gases. Afterwards, the surface of amorphous MOF‐contained MMMs was influenced by O2 plasma to thrive polar groups of membranes surface. The best gas separation result owned to amorphous NH2‐UiO‐66 comprised MMM treated by O2 plasma for 3 min at 600 W with CO2 permeability and CO2/CH4 selectivity of 10.96 Barrer and 97.91, respectively. The mentioned MMM showed CO2 permeability and CO2/CH4 selectivity of 8.69 Barrer and 75.56 before plasma treatment which were 170 and 50% higher than those of pristine PES/PSF/PVP blend membrane.

Study of the Application of Pellets From Textile Material Waste and Biomass Mixture in Industrial and Residental Heating Systems

“…Investigation of the 4th specimen (wood chips with 10% PES powder) shows lowest ash contain 0.43% (among specimens with additives). This result of ash can be explained by the fact that in time of combustion PES powder the products comprised of carbon (С), hydrogen (H2), oxygen (O2), and nitrogen (N2), where hydrogen, oxygen, and nitrogen are gases [27], [28]. In order to explain how the energy density of the fuel changes, it is necessary to take into account its constituent raw materials.…”

Facile synthesis of ZIF‐67@PVA/CA nanofibrous aerogel as efficient and recyclable catalyst for the degradation of organic pollutants through peroxymonosulfate activation

“…Metal–organic frameworks (MOFs), which are microporous crystals consisting of organic linkers and metal‐containing nodes, have been widely explored. Due to their unique characteristics, including tunable nano‐scaled structure, ultrahigh surface area, and chemical diversity, MOFs have shown outstanding performance in adsorption, separation, sensors, and heterogeneous catalysis 17–19 . Till date, various MOFs have been used as heterogeneous catalysts to activate PMS for efficient degradation of organic dyes in water, especially Co‐based MOFs.…”

“…Due to their unique characteristics, including tunable nanoscaled structure, ultrahigh surface area, and chemical diversity, MOFs have shown outstanding performance in adsorption, separation, sensors, and heterogeneous catalysis. [17][18][19] Till date, various MOFs have been used as heterogeneous catalysts to activate PMS for efficient degradation of organic dyes in water, especially Co-based MOFs. Lin et al first developed ZIF-67 as a heterogeneous catalyst to activate PMS for the degradation of Rhodamine B dye.…”

High dye separation performance of novel Cu‐BTC/PES MMMs with water‐stabilized Cu‐BTC nanoparticles

“…This leads to a decline in membrane performance and severely limits their practical application for separation membranes. [18][19][20] Metal-organic framework materials (MOFs) have garnered significant attention due to their highly controllable topological structure, large surface area, high porosity, flexibility and functionalization capabilities. [21][22][23] These properties make MOFs ideal for a wide range of applications in industries such as gas storage, 24 heterogeneous catalysis, 25 electronics, 26 and biopharmaceutical delivery.…”

“…However, despite numerous modified approaches proposed, achieving a fault‐free membrane structure and ideal packing distribution remains challenging due to the different compatibility of the filler‐polymer interface during MMMs preparation. This leads to a decline in membrane performance and severely limits their practical application for separation membranes 18–20 …”