scholarly journals Synthesis of graphene oxide/polyimide mixed matrix membranes for desalination

RSC Advances ◽  
2017 ◽  
Vol 7 (4) ◽  
pp. 2211-2217 ◽  
Author(s):  
Bo Feng ◽  
Kai Xu ◽  
Aisheng Huang
Keyword(s):  
Graphene Oxide ◽  
Water Flux ◽  
High Water ◽  
High Salt ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix ◽  
Salt Rejection ◽  
Matrix Membranes

Graphene oxide (GO) was incorporated into polyimide (PI) to fabricate GO/PI mixed matrix membranes (MMMs), which show a high water flux (36.1 kg m−2 h−1) and a high salt rejection (99.9%) for desalination of 3.5 wt% seawater at 90 °C.

scholarly journals Understanding the morphology of MWCNT/PES mixed-matrix membranes using SANS: interpretation and rejection performance

2019 ◽  
Vol 9 (7) ◽  
Author(s):  
Km Nikita ◽  
P. Karkare ◽  
D. Ray ◽  
V. K. Aswal ◽  
Puyam S. Singh ◽  
...  
Keyword(s):  
Water Flux ◽  
High Water ◽  
Mixed Matrix Membranes ◽  
High Porosity ◽  
Mixed Matrix ◽  
Multiwalled Carbon ◽  
Working Pressure ◽  
Water Transportation ◽  
Phase Inversion Technique ◽  
Matrix Membranes

Abstract We describe the relationship between the morphology and rejection performance by the mixed-matrix membranes as a unique class of high water flux nanofiltration membranes comprising polyethersulfone/functionalized multiwalled carbon nanotubes (PES/f-MWCNTs). These membranes contain aligned MWCNTs uniformly distributed inside a PES matrix prepared using conventional phase-inversion technique. The small-angle neutron scattering analysis confirmed the high porosity and uniformity among of the pores of CNTs in the membranes. The frictionless water transport from vertically oriented f-MWCNTs were verified to facilitate remarkable enhancement in the water flux through the membranes. The water transportation speed, as well as rejection, of selected heavy metals increases nearly about 3 times and 2–3.5 times, respectively, than the pristine PES membrane, depending upon CNTs loading. Low working pressure and good retention properties make these membranes to be an ideal for the application of highly efficient filtration units.

Transport mechanism of water molecules passing through polyamide/COF mixed matrix membranes

2019 ◽  
Vol 21 (48) ◽  
pp. 26591-26597 ◽  
Author(s):  
Yang Song ◽  
Mingjie Wei ◽  
Fang Xu ◽  
Yong Wang
Keyword(s):  
Water Permeability ◽  
Transport Mechanism ◽  
High Water ◽  
Mixed Matrix Membranes ◽  
Water Molecules ◽  
Mixed Matrix ◽  
Salt Rejection ◽  
The Cost ◽  
Significant Attention ◽  
Matrix Membranes

Mixed matrix membranes (MMMs) have gained significant attention due to their high water permeability without the cost of salt rejection. The mechanism of permeability promotion for PA/COFs MMMs is investigated in this work from molecular insights.

Effective gas separation through graphene oxide containing mixed matrix membranes

2018 ◽  
Vol 135 (21) ◽  
pp. 46271 ◽  
Author(s):  
Elahe Ahmadi Feijani ◽  
Ahmad Tavassoli ◽  
Hossein Mahdavi ◽  
Hossein Molavi
Keyword(s):  
Graphene Oxide ◽  
Gas Separation ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix ◽  
Matrix Membranes

scholarly journals Mixed-Matrix Membranes Comprising of Polysulfone and Porous UiO-66, Zeolite 4A, and Their Combination: Preparation, Removal of Humic Acid, and Antifouling Properties

Membranes ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 393
Author(s):  
Tanzila Anjum ◽  
Rahma Tamime ◽  
Asim Laeeq Khan
Keyword(s):  
Humic Acid ◽  
High Performance ◽  
Synergistic Effects ◽  
Pure Water ◽  
Water Flux ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix ◽  
Zeolite 4A ◽  
Pure Water Flux ◽  
Matrix Membranes

High-performance Mixed-Matrix Membranes (MMMs) comprising of two kinds of porous fillers UiO-66 and Zeolite 4Aand their combination were fabricated with polysulfone (PSf) polymer matrix. For the very first time, UiO-66 and Zeolite 4A were jointly used as nanofillers in MMMs with the objective of complimenting synergistic effects. The individual and complimentary effects of nanofillers were investigated on membrane morphology and performance, pure water flux, humic acid rejection, static humic acid adsorption, and antifouling properties of membranes. Scanning Electron Microscopy (SEM) analysis of membranes confirmed that all MMMs possessed wider macrovoids with higher nanofiller loadings than neat PSf membranes and the MMMs (PSf/UiO-66 and PSf/Zeolite 4A-UiO-66) showed tendency of agglomeration with high nanofiller loadings (1 wt% and 2 wt%). All MMMs exhibited better hydrophilicity and lower static humic acid adsorption than neat PSf membranes. Pure water flux of MMMs was higher than neat PSf membranes but the tradeoff between permeability and selectivity was witnessed in the MMMs with single nanofiller. However, MMMs with combined nanofillers (PSf/Zeolite 4A-UiO-66) showed no such tradeoff, and an increase in both permeability and selectivity was achieved. All MMMs with lower nanofiller loadings (0.5 wt% and 1 wt%) showed improved flux recovery. PSf/Zeolite 4A-UiO-66 (0.5 wt%) membranes showed the superior antifouling properties without sacrificing permeability and selectivity.

scholarly journals Pebax/ionic liquid modified graphene oxide mixed matrix membranes for enhanced CO2 capture

2018 ◽  
Vol 565 ◽  
pp. 370-379 ◽  
Author(s):  
Guoji Huang ◽  
Ali Pournaghshband Isfahani ◽  
Ansori Muchtar ◽  
Kento Sakurai ◽  
Binod Babu Shrestha ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Graphene Oxide ◽  
Co2 Capture ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix ◽  
Modified Graphene Oxide ◽  
Modified Graphene ◽  
Matrix Membranes

Poly(Vinyl Alcohol)/Graphene Oxide Mixed Matrix Membranes for Pervaporation of Toluene and Isooctane

2017 ◽  
Vol 56 (12) ◽  
pp. 1286-1294 ◽  
Author(s):  
Ali Khazaei ◽  
Vahid Mohebbi ◽  
Reza M. Behbahani ◽  
Ahmad Ramazani S.A.
Keyword(s):  
Graphene Oxide ◽  
Vinyl Alcohol ◽  
Mixed Matrix Membranes ◽  
Poly Vinyl Alcohol ◽  
Mixed Matrix ◽  
Matrix Membranes
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