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You searched for: Journal name Journal of membrane science Remove constraint Journal name: Journal of membrane science Subject term clay Remove constraint Subject term: clay
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1. Insights into the performance and degradation of polybenzimidazole/muscovite composite membranes in high–temperature proton exchange membrane fuel cells

Author:
Zunmin Guo; Jianuo Chen; Jae Jong Byun; Maria Perez–Page; Zhaoqi Ji; Ziyu Zhao; Stuart M. Holmes
Source:
Journal of membrane science 2022 v.641 pp. 119868
ISSN:
0376-7388
Subject:
asymmetric membranes; catalysts; clay; crosslinking; dimensional stability; durability; humidification; muscovite; phosphoric acid; polymers; strength (mechanics)
Abstract:
... To improve the performance and durability of phosphoric acid (PA) doped polybenzimidazole (PBI) membranes in high–temperature proton exchange membrane fuel cells (HT–PEMFCs), in this work, as–received natural muscovite (Mus), a clay material, was successfully incorporated into PBI matrix as an inorganic filler through the doctor blade method. The amount of Mus was varied (0.5–2 wt%) to explore its ...
DOI:
10.1016/j.memsci.2021.119868

2. A novel monolithic mullite microfiltration membrane for oil-in-water emulsion separation

Author:
Mohammed Rashad; G. Logesh; Ummen Sabu; M. Balasubramanian
Source:
Journal of membrane science 2021 v.620 pp. 118857
ISSN:
0376-7388
Subject:
ceramics; clay; cost effectiveness; crosslinking; emulsions; microfiltration; microstructure; modulus of rupture; oils; porosity; China
Abstract:
... Monolithic ceramic microfiltration membranes made up of an interlocking network of mullite crystals have been developed from low-cost raw materials, consisting of China clay, AlF₃·3H₂O and Al₂O₃. The characteristics of the developed membranes have been studied. The membrane made from clay+40 wt% AlF₃·3H₂O powder mixture with 10 wt% Al₂O₃ displayed excellent properties, with apparent porosity of 64 ...
DOI:
10.1016/j.memsci.2020.118857

3. Perovskite ceramic membrane separator with improved biofouling resistance for yeast-based microbial fuel cells

Author:
Domenico Frattini; Grazia Accardo; Yongchai Kwon
Source:
Journal of membrane science 2020 v.599 pp. 117843
ISSN:
0376-7388
Subject:
artificial membranes; biofouling; ceramics; clay; cobalt; lithium; microbial fuel cells; oxides; permeability; porosity; powders; separators; temperature; water uptake; yeasts
Abstract:
... Ceramic-derived components in microbial fuel cells (MFCs) aim to substitute Nafion 117. Ceramic membranes are a cheaper alternative and powders’ tailoring has beneficial flexibility for proper surface morphology, porosity, controlled permeability, and water uptake. In this work, differently from the fine fired ceramics or clay materials, barium-cerium-gadolinium oxides (BCGO) powders, co-doped wit ...
DOI:
10.1016/j.memsci.2020.117843

4. Synthesis of novel composite membranes by in-situ intercalative emulsion polymerization for separation of aromatic-aliphatic mixtures by pervaporation

Author:
Amritanshu Banerjee; Samit Kumar Ray
Source:
Journal of membrane science 2020 v.597 pp. 117729
ISSN:
0376-7388
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; acrylic acid; asymmetric membranes; benzene; clay; composite polymers; crosslinking; differential thermal analysis; emulsions; energy-dispersive X-ray analysis; maleic acid; montmorillonite; pervaporation; polymerization; polyvinyl alcohol; response surface methodology; scanning electron microscopy; sodium; solvents; sorption; thermogravimetry; transmission electron microscopy
Abstract:
... Sodium montmorillonite (NaMMT) clay was coated with copolymer of acrylonitrile and acrylic acid of different comonomer ratios by in situ intercalative emulsion polymerization in water. Both untreated clay and polymer coated clay was incorporated in polyvinyl alcohol (PVA) followed by its crosslinking with maleic acid to form several composite membranes. These membranes were characterized by XRD, F ...
DOI:
10.1016/j.memsci.2019.117729

5. Perfluorinated hybrid membranes modified by metal decorated clay nanotubes

Author:
D.A. Petrova; A.N. Filippov; N.A. Kononenko; S.A. Shkirskaya; M.O. Timchenko; E.V. Ivanov; V.A. Vinokurov; Yu.M. Lvov
Source:
Journal of membrane science 2019 v.582 pp. 172-181
ISSN:
0376-7388
Subject:
cation exchange; cation-exchange membranes; clay; contact angle; dimethylformamide; electrical conductivity; electrolytes; electroosmosis; fuel cells; halloysite; hydrophilicity; hydrophobicity; isopropyl alcohol; nanocomposites; nanoparticles; nanotubes; palladium; permeability; platinum; polymers; solvents
Abstract:
... A number of one-layer perfluorinated cation-exchange membranes modified by halloysite clay nanotubes were prepared using two different solvents: dimethylformamide and isopropanol. The modifier is hybrid Pd, Pt/clay nanotubes doped at 4 wt % into the polymeric matrix. Metal nanoparticles of platinum or palladium were deposited onto the surface of the nanotubes then embedded into membranes providing ...
DOI:
10.1016/j.memsci.2019.03.084

6. Photoacoustic spectroscopy as a potential method for studying fouling of flat-sheet ultrafiltration membranes

Author:
Agnieszka Miśkiewicz; Grażyna Zakrzewska-Kołtuniewicz; Sylwia Pasieczna-Patkowska
Source:
Journal of membrane science 2019 v.583 pp. 59-69
ISSN:
0376-7388
Subject:
artificial membranes; clay; cleaning; fouling; models; molecular weight; particle size; photoacoustic spectroscopy; polyacrylic acid; scanning electron microscopy; ultrafiltration; water solubility
Abstract:
... In this study, the application of photoacoustic spectroscopy (FT-IR/PAS) is proposed to investigate membrane fouling phenomena. Ultrafiltration membranes made of polyether sulfone (PES) in modules operated at different flow regimes (dead-end and cross-flow) were used in this paper. Solutions of water-soluble poly(acrylic acid) and suspensions of a natural red clay were used as model media during t ...
DOI:
10.1016/j.memsci.2019.04.048

7. Can high oxygen and water vapor barrier nanocomposite coatings be obtained with a waterborne formulation?

Author:
Evgeny S. Tsurko; Patrick Feicht; Christoph Habel; Theresa Schilling; Matthias Daab; Sabine Rosenfeldt; Josef Breu
Source:
Journal of membrane science 2017 v.540 pp. 212-218
ISSN:
0376-7388
Subject:
artificial membranes; clay; coatings; food packaging; hydrogen bonding; nanocomposites; oxygen; polyvinyl alcohol; relative humidity; spraying; water vapor
Abstract:
... Modification of synthetic, high aspect ratio clay with 6-aminocaprohydroxamic acid hydrochloride pushes the interaction between the polyvinyl alcohol (PVA) matrix and the filler to the level where the waterborne nanocomposite becomes rather insensitive to swelling, even at an elevated relative humidity (RH). The modifier can form strong hydrogen bonds with the hydroxyl groups of PVA via the hydrox ...
DOI:
10.1016/j.memsci.2017.06.051

8. PVA modified filled copolymer membranes for pervaporative dehydration of acetic acid-systematic optimization of synthesis and process parameters with response surface methodology

Author:
Amritanshu Banerjee; Samit Kumar Ray
Source:
Journal of membrane science 2018 v.549 pp. 84-100
ISSN:
0376-7388
Subject:
acetic acid; acrylic acid; artificial membranes; clay; composite polymers; emulsions; polymerization; polyvinyl alcohol; response surface methodology; temperature
Abstract:
... The separation potential of acrylic copolymer membrane was significantly improved by modifying it with polyvinyl alcohol (PVA) and nano sized sodium montmorillonite (NaMMT) clay. Accordingly, several membranes were prepared from the polymers synthesized by emulsion polymerization of acrylonitrile (AN) and acrylic acid (AA)in the presence of varied concentrations of PVA and NaMMT clay in the reacti ...
DOI:
10.1016/j.memsci.2017.11.056

9. Water transport mechanisms for salt-rejecting membranes driven by soil-water potentials

Author:
Coleman J. Henry; Jonathan A. Brant; Thijs J. Kelleners
Source:
Journal of membrane science 2018 v.563 pp. 107-114
ISSN:
0376-7388
Subject:
artificial membranes; clay; desalination; kaolin; osmotic pressure; physicochemical properties; reverse osmosis; sand; soil types; soil water; vapor pressure
Abstract:
... Water transport may be driven across dense thin-films when contacted with soil to create a non-pressure driven desalination process; however, the roles played by the different soil-water potential components (matric, osmotic, and vapor pressure) in driving water flux are not completely understood. Bench-scale tests were done using a reverse osmosis membrane and three different soils: sand, sandy-l ...
DOI:
10.1016/j.memsci.2018.05.041

10. Hybrid membranes of sulfonated poly ether ether ketone, ionic liquid and organically modified montmorillonite for proton exchange membranes with enhanced ionic conductivity and ionic liquid lixiviation protection

Author:
Jose Jonathan Rubio Arias; José Carlos Dutra; Ailton de Souza Gomes
Source:
Journal of membrane science 2017 v.537 pp. 353-361
ISSN:
0376-7388
Subject:
artificial membranes; nuclear magnetic resonance spectroscopy; X-ray diffraction; models; cations; clay; electrochemistry; transmission electron microscopy; montmorillonite; ionic liquids
Abstract:
... Through the fabrication of hybrid membranes, composed by the protic ionic liquid diethylmethylammonium trifluomethane sulfonate (demaTfO), sulfonated poly (ether ether kethone) with degree of sulfonation 73% (sPEEK73) and montmorillonite modified with dema⁺ cation (Mmtdema), this work evaluates the effect exerted by the compatibilization between clay and ionic liquid on the morphology and performa ...
DOI:
10.1016/j.memsci.2017.05.044

11. Modeling and analysis of concentration profiles obtained by in-situ SAXS during cross-flow ultrafiltration of colloids

Author:
Y. Jin; N. Hengl; S. Baup; G. Maitrejean; F. Pignon
Source:
Journal of membrane science 2017 v.528 pp. 34-45
ISSN:
0376-7388
Subject:
artificial membranes; casein; clay; colloids; micelles; models; osmotic pressure; permeability; rheological properties; ultrafiltration
Abstract:
... Concentration profiles and structural organization of different colloidal suspensions in the vicinity of membrane during ultrasonic-assisted ultrafiltration were previously evidenced from non-destructive, real-time, in-situ SAXS measurements (Jin et al., 2014 [11], Jin et al., 2014 [12]). On the basis of these obtained results, this paper explored by numerical calculation, four key factors of the ...
DOI:
10.1016/j.memsci.2017.01.019

12. A new method to predict the effective diffusion coefficient of gases and vapors in polyurethane/clay nanocomposite membranes

Author:
Yaoxing Wu; Zhe Liu; Jose M. Herrera-Alonso; Eva Marand; John C. Little
Source:
Journal of membrane science 2016 v.510 pp. 201-208
ISSN:
0376-7388
Subject:
artificial membranes; clay; clay fraction; diffusivity; models; nanocomposites; nanomaterials; permeability; polyurethanes; prediction; transmission electron microscopy; vapors; volatile organic compounds
Abstract:
... Polymer/clay nanocomposite (PCN) membranes are useful as barrier materials to reduce the permeability of gases and vapors through polymer materials. Extensive studies have focused on theoretical prediction of the effective diffusion coefficients based on the clay fraction and distribution within the polymer matrix. However, existing models are based on highly idealized geometries of the PCN membra ...
DOI:
10.1016/j.memsci.2016.02.068

13. A review of the water barrier properties of polymer/clay and polymer/graphene nanocomposites

Author:
B. Tan; N.L. Thomas
Source:
Journal of membrane science 2016 v.514 pp. 595-612
ISSN:
0376-7388
Subject:
artificial membranes; clay; graphene; models; permeability; polymer nanocomposites; polymers; water vapor
Abstract:
... This paper reviews the literature on moisture barrier properties of polymer/clay and polymer/graphene-based nanocomposites. The various models proposed to predict the effects of nanofillers in reducing water vapour permeability through polymers are outlined. These models are based on a range of different factors such as; tortuosity, geometry, platelet stacking, orientation, polymer chain confineme ...
DOI:
10.1016/j.memsci.2016.05.026

14. Active learning assisted strategy of constructing hybrid models in repetitive operations of membrane filtration processes: Using case of mixture of bentonite clay and sodium alginate

Author:
Yi Liu; Chen-Pei Chou; Junghui Chen; Juin-Yih Lai
Source:
Journal of membrane science 2016 v.515 pp. 245-257
ISSN:
0376-7388
Subject:
artificial membranes; bentonite; clay; empirical models; fouling; learning; microfiltration; prediction; regression analysis; sodium alginate; variance
Abstract:
... Reliable prediction of the transmembrane pressure (TMP) in membrane filtration systems often encounters different challenges in practice, including process nonlinearity, cycle-to-cycle change, and multiple operating conditions. In this work, an active learning TMP model with the hybrid structure is developed to predict the short-term fouling formation. The advantages of the physical and empirical ...
DOI:
10.1016/j.memsci.2016.05.057

15. Development of bubble-less ozonation and membrane filtration process for the treatment of contaminated water

Author:
S.K. Stylianou; S.D. Sklari; D. Zamboulis; V.T. Zaspalis; A.I. Zouboulis
Source:
Journal of membrane science 2015 v.492 pp. 40-47
ISSN:
0376-7388
Subject:
aluminum oxide; aqueous solutions; arsenic; artificial membranes; ceramics; clay; contact angle; fouling; humic acids; hydrophilicity; hydrophobicity; kaolin; microfiltration; ozonation; ozone; ultrafiltration; water pollution; water purification
Abstract:
... The aim of this research was the evaluation of performance efficiency of a continuous treatment process, integrating bubbles-less ozonation and membrane filtration for water purification. A new bench-scale experimental apparatus was designed, comprising of two ceramic membrane modules, connected in series. In the first module, bubble-free ozone contacting takes place via a modified α-Al2O3 membran ...
DOI:
10.1016/j.memsci.2015.05.036

16. Modeling of combined particles and natural organic matter fouling of ultrafiltration membrane

Author:
B. Teychene; G. Collet; H. Gallard
Source:
Journal of membrane science 2016 v.505 pp. 185-193
ISSN:
0376-7388
Subject:
artificial membranes; clay; fouling; humic substances; kaolinite; models; synergism; ultrafiltration
Abstract:
... In this study the combined particles and organic matter (OM) fouling was investigated using kaolinite clay and humic substances. Results confirm the occurrence of a synergistic effect between the particles and the OM leading to a stronger flux decline than the one predicted by the resistance in series model. Moreover, a higher organic matter transmission through the membrane was observed when filt ...
DOI:
10.1016/j.memsci.2016.01.039

17. Clay nanosheets as charged filler materials for high-performance and fouling-resistant thin film nanocomposite membranes

Author:
Hang Dong; Liguang Wu; Lin Zhang; Huanlin Chen; Congjie Gao
Source:
Journal of membrane science 2015 v.494 pp. 92-103
ISSN:
0376-7388
Subject:
additives; artificial membranes; cationic surfactants; clay; desalination; electrostatic interactions; fouling; hydrophilicity; montmorillonite; nanoclays; nanocomposites; nanosheets; organic matter; polymerization; reverse osmosis
Abstract:
... Montmorillonite (MMT), a cationic clay, and layered double hydroxide (LDH), an anionic clay were prepared through “top-down” and “bottom-up” methods, respectively, with lateral dimension on hundred-nanometer scale as well as high aspect ratio. These two types of nanosheets, served as additives in interfacial polymerization process, were utilized to fabricate thin film nanocomposite (TFN) reverse o ...
DOI:
10.1016/j.memsci.2015.07.049

18. Elaboration of novel tubular ceramic membrane from inexpensive raw materials by extrusion method and its performance in microfiltration of synthetic oily wastewater treatment

Author:
R. Vinoth Kumar; Aloke Kumar Ghoshal; G. Pugazhenthi
Source:
Journal of membrane science 2015 v.490 pp. 92-102
ISSN:
0376-7388
Subject:
additives; artificial membranes; calcium carbonate; ceramics; clay; corrosion; emulsions; extrusion; feldspar; fouling; kaolin; microfiltration; models; oils; permeability; porosity; powders; quartz; raw materials; strength (mechanics); ultrafiltration; wastewater; wastewater treatment
Abstract:
... A tubular ceramic microfiltration membrane was prepared by an extrusion technique using inexpensive clay mixtures namely, ball clay, kaolin, feldspar, quartz, pyrophyllite and calcium carbonate. The mixture of clay powders extruded to form a porous tubular membrane without the addition of any organic additives. The dimensions, such as outer and inner diameters, wall thickness and length of the tub ...
DOI:
10.1016/j.memsci.2015.04.066

19. Improvement of Nafion®-sepiolite composite membranes for PEMFC with sulfo-fluorinated sepiolite

Author:
Christian Beauger; Guillaume Lainé; Alain Burr; Aurélie Taguet; Belkacem Otazaghine
Source:
Journal of membrane science 2015 v.495 pp. 392-403
ISSN:
0376-7388
Subject:
sepiolite; ion exchange capacity; fuel cells; nuclear magnetic resonance spectroscopy; electrodes; clay; asymmetric membranes; mechanical properties; modulus of elasticity; Fourier transform infrared spectroscopy; sulfonic acids; titration; water uptake; thermal analysis
Abstract:
... A new composite membrane based on Nafion® loaded with sulfo-fluorinated sepiolite was prepared, characterized and tested in a membrane electrode assembly in fuel cell operating conditions.Pristine sepiolite, a natural microfibrous and highly hygroscopic clay, was first modified so as to make it proton conductive on one hand and to increase compatibility with Nafion® on the other hand. The proton c ...
DOI:
10.1016/j.memsci.2015.08.014

20. PVDF/palygorskite composite ultrafiltration membranes with enhanced abrasion resistance and flux

Author:
Jing Ji; Shouyong Zhou; Chi Yan Lai; Bo Wang; K. Li
Source:
Journal of membrane science 2015 v.495 pp. 91-100
ISSN:
0376-7388
Subject:
abrasion resistance; artificial membranes; clay; dextran; fluorides; hydrophilicity; modulus of elasticity; molecular weight; palygorskite; permeability; protocols; silicon carbide; tensile strength; total suspended solids; ultrafiltration; water treatment
Abstract:
... The anti-wearing property is important to the lifetime of membranes especially when they are used in heavy-duty water treatment, where the content of suspended solid is often high. Abrasion-resistant membranes are expected to have prolonged lifetimes and reduce considerably the maintenance cost of water treatment plants. In this research, palygorskite (PGS), a natural abundant nano rod-like clay m ...
DOI:
10.1016/j.memsci.2015.08.011

21. Support media impacts on humic acid, cellulose, and kaolin clay in reducing fouling in a submerged hollow fiber membrane system

Author:
Mohammad T. Alresheedi; Onita D. Basu
Source:
Journal of membrane science 2014 v.450 pp. 282-290
ISSN:
0376-7388
Subject:
artificial membranes; cellulose; clay; experimental design; fouling; humic acids; inorganic matter; kaolin; ultrafiltration; water quality
Abstract:
... The impact of support media on a submerged hollow fiber PVDF ultrafiltration membrane system filtering synthetic water with different organic and inorganic matter content was investigated using a factorial design of experiments. Support media was added into a membrane reactor where membrane fouling and water quality parameters were assessed. The addition of support media into the membrane reactor ...
DOI:
10.1016/j.memsci.2013.08.024

22. Influence of polymer interdiffusion and clay concentration on gas barrier of polyelectrolyte/clay nanobrick wall quadlayer assemblies

Author:
Ping Tzeng; Cale R. Maupin; Jaime C. Grunlan
Source:
Journal of membrane science 2014 v.452 pp. 46-53
ISSN:
0376-7388
Subject:
artificial membranes; clay; electrolytes; electronics; food packaging; light transmission; oxygen; polyacrylic acid; polyethylene terephthalates; polyethyleneimine; transmission electron microscopes
Abstract:
... Thin film assemblies of polyvinylamine (PVAm), branched polyethylenimine (PEI), poly(acrylic acid) (PAA) and sodium montmorillonite (MMT) clay, created using the layer-by-layer assembly technique, demonstrate the influence of polymer interdiffusion and clay concentration on oxygen barrier behavior. These quadlayer (QL) assemblies can be switched from linear to exponential growth by varying the pla ...
DOI:
10.1016/j.memsci.2013.10.039

23. Intensification of cross-flow membrane filtration using dielectrophoresis with a novel electrode configuration

Author:
F. Du; P. Ciaciuch; S. Bohlen; Y. Wang; M. Baune; J. Thöming
Source:
Journal of membrane science 2013 v.448 no. pp. 256-261
ISSN:
0376-7388
Subject:
artificial membranes; clay; dielectrophoresis; electric field; electric power; electrochemistry; electrodes; filtration; fouling; heat; porosity; temperature
Abstract:
... Fouling can be a serious problem in membrane filtration processes. Here we present a solution that avoids addition of chemicals and allows for uninterrupted operation of cross-flow micro-filtration process. A novel electrode configuration is suggested for generating an inhomogeneous electric (ac) field for repelling particles from the membrane by means of dielectrophoresis (DEP). Undesired electro ...
DOI:
10.1016/j.memsci.2013.08.016

24. Nanocomposites films based on soy proteins and montmorillonite processed by casting

Author:
Ignacio Echeverría; Patricia Eisenberg; Adriana N. Mauri
Source:
Journal of membrane science 2014 v.449 pp. 15-26
ISSN:
0376-7388
Subject:
X-ray diffraction; agitation; artificial membranes; clay; disulfide bonds; hydrogen bonding; montmorillonite; nanocomposites; permeability; solubility; soy protein; structure-activity relationships; transmission electron microscopy; ultrasonic treatment; water content; water vapor
Abstract:
... In this work the effect of montmorillonite (MMT) addition to soy-protein-based films on the physicochemical properties of the resulting nanocomposites was studied and the structure–function relationship of these materials and the changes in phase structures, due to different interactions among the material components were analyzed. Flexible nanocomposite films consisting in a soy-protein (SP) matr ...
DOI:
10.1016/j.memsci.2013.08.006

25. Polysulphone/montmorillonite nanocomposite membranes: Effect of clay addition and polysulphone molecular weight on the membrane properties

Author:
Priscila Anadão; Laís F. Sato; Rafael R. Montes; Henrique S. De Santis
Source:
Journal of membrane science 2014 v.455 pp. 187-199
ISSN:
0376-7388
Subject:
artificial membranes; clay; clay fraction; hydrophilicity; molecular weight; montmorillonite; nanocomposites; permeability; porosity; relative humidity; solutes; thermodynamics; water vapor
Abstract:
... Polysulphone (PSf)/sodium montmorillonite clay (MMT) nanocomposite membranes were prepared via a congruence of the wet-phase inversion and the solution dispersion techniques, and a thermodynamic study, as well as an investigation of its morphological properties, hydrophilicity and membrane performance, were performed with respect to the PSf molecular weight and MMT content. An increase in both of ...
DOI:
10.1016/j.memsci.2013.12.081

26. Synthesis, characterization and application of novel high flux FO membrane by layer-by-layer self-assembled polyelectrolyte

Author:
Pankaj Pardeshi; Alka A. Mungray
Source:
Journal of membrane science 2014 v.453 pp. 202-211
ISSN:
0376-7388
Subject:
ammonium; anions; artificial membranes; chitosan; clay; hydrophilicity; montmorillonite; osmosis; particle size; permeability; polyacrylic acid; polymer nanocomposites; polyvinyl alcohol; porosity; scanning electron microscopy; sodium chloride; solutes; tallow; thermal properties; thermogravimetry; wastewater
Abstract:
... For the development of forward osmosis (FO) technology, proficient membranes are required for separation with appropriate transport characteristics. Polymer nanocomposites have been showing a great flexibility for tailoring membrane substrate. A layer-by-layer (LbL) method of polyelectrolyte has unveiled the best option for fabricating the required separation layer. In this research work, the nano ...
DOI:
10.1016/j.memsci.2013.11.001

27. The role of layered silicate loadings and their dispersion states on the gas separation performance of mixed matrix membrane

Author:
A.K. Zulhairun; A.F. Ismail
Source:
Journal of membrane science 2014 v.468 pp. 20-30
ISSN:
0376-7388
Subject:
X-ray diffraction; asymmetric membranes; carbon dioxide; clay; interphase; methane; models; nanocomposites; polymers; scanning electron microscopy; silicates; transmission electron microscopy
Abstract:
... Mixed matrix membranes (MMMs) embodying different types of organoclays, namely Cloisite® 5, Cloisite® 15A and Cloisite® 30B as the disperse phase for gas separation membranes, were prepared. Polysulfone (PSF) has been used as host matrix to prepare asymmetric membranes attained by the dry–wet phase inversion casting process. FESEM analysis has revealed that defect-free asymmetric MMM morphology wi ...
DOI:
10.1016/j.memsci.2014.05.038

28. Assessment of role of morphology in gas permselectivity of membranes based on polypropylene/ethylene vinyl acetate/clay nanocomposite

Author:
Vahabodin Goodarzi; Seyed Hassan Jafari; Hossein Ali Khonakdar; Behnam Ghalei; Mehdi Mortazavi
Source:
Journal of membrane science 2013 v.445 no. pp. 76-87
ISSN:
0376-7388
Subject:
X-ray diffraction; acetates; annealing; artificial membranes; carbon dioxide; clay; crystal structure; droplet size; ethylene-vinyl acetate; gases; nanocomposites; nitrogen; oxygen; permeability; polypropylenes; scanning electron microscopy; solubility; transmission electron microscopy
Abstract:
... This paper reports on the influence of morphology on gas permeability and selectivity of membranes made from polypropylene (PP)/ethylene vinyl acetate copolymer (EVA)/clay (OMMT) nanocomposites. The morphology was adjusted by variation in the EVA (25, 50wt%), OMMT (0 and 5wt%) and compatibilizer (PP-g-MAH) (0 and 5wt%) contents. Gas permeation properties of membranes with different morphologies, w ...
DOI:
10.1016/j.memsci.2013.04.073

29. New clay–alumina porous capillary supports for filtration application

Author:
Sandeep Sarkar; Sibdas Bandyopadhyay; André Larbot; Sophie Cerneaux
Source:
Journal of membrane science 2012 v.392-393 no. pp. 130-136
ISSN:
0376-7388
Subject:
additives; aluminum oxide; ambient temperature; artificial membranes; ceramics; clay; extrusion; filtration; mechanical properties; pastes; physicochemical properties; plasticizers; rheological properties; wastewater
Abstract:
... Ceramic pastes of different clay–alumina compositions were prepared with required rheological property for extrusion processing. The composition was varied from 0 to 85weight percent (wt.%) of clay and remaining alumina and mixed with different organic additives which acted as binder, plasticizer, pore former along with water. The paste was then extruded to green capillary tubes with dimensions of ...
DOI:
10.1016/j.memsci.2011.12.010

30. Novel thin film composite membrane fabricated by mixed matrix nanoclay/chitosan on PVDF microfiltration support: Preparation, characterization and performance in dye removal

Author:
Parisa Daraei; Sayed Siavash Madaeni; Ehsan Salehi; Negin Ghaemi; Hedayatolah Sadeghi Ghari; Mohammad Ali Khadivi; Elham Rostami
Source:
Journal of membrane science 2013 v.436 no. pp. 97-108
ISSN:
0376-7388
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; acidity; adsorption; artificial membranes; chemical structure; chitosan; clay; coatings; methylene blue; microfiltration; nanoclays; nanocomposites; nanoparticles; scanning electron microscopy
Abstract:
... Novel thin film composite (TFC) membrane was prepared by organoclay/chitosan nanocomposite coated on the commercial polyvinylidene fluoride (PVDF) microfiltration membrane. The procedure was set to prepare a PVDF/chitosan TFC membrane without applying a cross-linker agent. Various quantities of two different grades of organoclay (Cloisite 15A and 30B) were added into chitosan solution to find the ...
DOI:
10.1016/j.memsci.2013.02.031

31. Preparation and characterization of highly hydrophobic poly(vinylidene fluoride) – Clay nanocomposite nanofiber membranes (PVDF–clay NNMs) for desalination using direct contact membrane distillation

Author:
J.A. Prince; G. Singh; D. Rana; T. Matsuura; V. Anbharasi; T.S. Shanmugasundaram
Source:
Journal of membrane science 2012 v.397-398 no. pp. 80-86
ISSN:
0376-7388
Subject:
Fourier transform infrared spectroscopy; artificial membranes; clay; contact angle; crystallization; desalination; differential scanning calorimetry; distillation; hydrophobicity; melting point; nanocomposites; nanofibers; scanning electron microscopy
Abstract:
... Electrospun nanofiber membranes consisting of poly(vinylidene fluoride) (PVDF) blended with clay nanocomposites were prepared and tested in this paper for direct contact membrane distillation (DCMD) applications. Various compositions of PVDF–clay nanocomposite nanofiber membranes (NNMs) were prepared and characterized by water contact angle, Fourier transform infrared spectroscopy, differential sc ...
DOI:
10.1016/j.memsci.2012.01.012

32. Effect of peptizer on the properties of Nafion–Laponite clay nanocomposite membranes for polymer electrolyte membrane fuel cells

Author:
Ananta Kumar Mishra; Tapas Kuila; Nam Hoon Kim; Joong Hee Lee
Source:
Journal of membrane science 2012 v.389 no. pp. 316-323
ISSN:
0376-7388
Subject:
artificial membranes; clay; commercialization; electrolytes; fuel cells; mechanical properties; mixing; nanocomposites; phosphoric acid; polymers; sodium pyrophosphate; temperature; thermal stability
Abstract:
... Nafion is the most widely accepted and commercialized membrane for polymer electrolyte membrane fuel cells owing to its high proton conductivity, mechanical stability and cell performance under humidified conditions at low temperature. However, the performance of the membrane deteriorates rapidly above 80°C. In this work, Laponite XLS, a synthetic grade of peptized Laponite clay, is used as inorga ...
DOI:
10.1016/j.memsci.2011.10.043

33. Clay supported polyvinyl acetate coated composite membrane by modified dip coating method: Application for the purification of lysozyme from chicken egg white

Author:
Somen Jana; M.K. Purkait; Kaustubha Mohanty
Source:
Journal of membrane science 2011 v.382 no.1-2 pp. 243-251
ISSN:
0376-7388
Subject:
air; artificial membranes; ceramics; chickens; clay; coatings; dipping; drying; egg albumen; lysozyme; pH; permeability; polyvinyl acetate; porosity; scanning electron microscopy; solvents; ultrafiltration
Abstract:
... Composite ultrafiltration membranes were prepared by applying thin coating of polyvinyl acetate (PVAc) over ceramic support by using a modified dip-coating method. Well-known dip coating method was not found suitable for PVAc, as the polymer solution (N,N-di-methyl acetamide solvent), was not viscous enough for uniform coating. In the modified technique, a secondary solvent (water) was used for th ...
DOI:
10.1016/j.memsci.2011.08.011

34. Composite membranes based on Nafion® and plasma treated clay charges: Elaboration and water sorption investigations

Author:
Kateryna Fatyeyeva; Corinne Chappey; Fabienne Poncin-Epaillard; Dominique Langevin; Jean-Marc Valleton; Stephane Marais
Source:
Journal of membrane science 2011 v.369 no.1-2 pp. 155-166
ISSN:
0376-7388
Subject:
adsorption; artificial membranes; clay; composite polymers; models; temperature; water activity; water vapor
Abstract:
... Composite polymer membranes were prepared by incorporation of modified layered inorganic clay (Laponite) into Nafion® membranes. The modification of Laponite particles was performed by the plasma activation process and the chemical grafting of sulfonic groups as well as by the direct plasma sulfonation. The modified Laponite particles incorporated into a polymer film contribute to an increase of t ...
DOI:
10.1016/j.memsci.2010.11.062

35. Cross-linked sulfonated poly (ether ether ketone) (SPEEK)/reactive organoclay nanocomposite proton exchange membranes (PEM)

Author:
Varsha R. Hande; Sangram K. Rath; Swati Rao; M. Patri
Source:
Journal of membrane science 2011 v.372 no.1-2 pp. 40-48
ISSN:
0376-7388
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; artificial membranes; benzene; clay; crosslinking; ion exchange; methanol; nanocomposites; oxidative stability; polymers; thermal stability; transmission electron microscopy
Abstract:
... Cross-linked sulfonated poly (ether ether ketone) (SPEEK)/reactive organoclay (Cloisite-30B) nanocomposite membranes were fabricated using 1,4-bis (hydroxymethyl) benzene (BHMB) as cross-linker and Cloisite-30B organoclay as the pseudo cross-linker. The cross-linked SPEEK/clay nanocomposite membranes were prepared via solution intercalation method. Participation of reactive organoclay in the cross ...
DOI:
10.1016/j.memsci.2011.01.042

36. Grafting of p-styrene sulfonate and 1,3-propane sultone onto Laponite for proton exchange membrane fuel cell application

Author:
Kateryna Fatyeyeva; Janick Bigarré; Benoit Blondel; Hervé Galiano; David Gaud; Magali Lecardeur; Fabienne Poncin-Epaillard
Source:
Journal of membrane science 2011 v.366 no.1-2 pp. 33-42
ISSN:
0376-7388
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; artificial membranes; cation exchange; chemical structure; clay; fuel cells; nanocomposites; styrene; sulfonates; surfaces; thermal analysis; thermal stability
Abstract:
... Chemical modification of clay (Laponite) particles was carried out through the plasma activation process and chemical grafting of sulfonic groups. The occurrence of the surface modification and the chemical structure of resulting products were characterized with FTIR, XPS and thermal analysis. Also, X-ray diffraction spectrometry observation of the Laponite particles confirmed the surface modifica ...
DOI:
10.1016/j.memsci.2010.09.023

37. High-temperature proton exchange membranes based on polybenzimidazole and clay composites for fuel cells

Author:
David Plackett; Ana Siu; Qingfeng Li; Chao Pan; Jens Oluf Jensen; Søren Fæster Nielsen; Anastasia A. Permyakova; Niels J. Bjerrum
Source:
Journal of membrane science 2011 v.383 no.1-2 pp. 78-87
ISSN:
0376-7388
Subject:
X-radiation; ambient temperature; artificial membranes; cations; clay; dimensional stability; electric power; fuel cells; hydrogen; hydrogen bonding; infrared spectroscopy; ion exchange; permeability; phosphoric acid; polymers; relative humidity; salts; tensile strength
Abstract:
... Good dispersion of modified laponite clay was achieved in polybenzimidazole (PBI) solutions which, when cast and allowed to dry, resulted in homogeneous and transparent composite membranes containing up to 20wt% clay in the polymer. The clay was organically modified using a series of ammonium and pyridinium salts with varying polarity and hydrogen-bonding capacity. Clay modification by ion-exchang ...
DOI:
10.1016/j.memsci.2011.08.038

38. Layer-by-layer deposition of clay and a polycation to control diffusive release from polyurea microcapsules

Author:
Janice Hickey; Nicholas A.D. Burke; Harald D.H. Stöver
Source:
Journal of membrane science 2011 v.369 no.1-2 pp. 68-76
ISSN:
0376-7388
Subject:
artificial membranes; cations; clay; coatings; montmorillonite; polymers; process control; thermogravimetry; transmission electron microscopy
Abstract:
... Polyurea microcapsules containing model organic fills were coated with clay and polycation layers to control diffusive release. This control process allows post-modification of the release rate without interfering with capsule formation. Microcapsules prepared by interfacial polyaddition of polymethylene polyphenyl isocyanate and diethylenetriamine were chosen as representative polyurea capsules h ...
DOI:
10.1016/j.memsci.2010.11.047

39. Oxygen permeability through poly(ethylene-co-vinyl acetate)/clay nanocomposites prepared by microwave irradiation

Author:
O. Urresti; A. González; M.J. Fernández-Berridi; J.J. Iruin; L. Irusta
Source:
Journal of membrane science 2011 v.373 no.1-2 pp. 173-177
ISSN:
0376-7388
Subject:
acetates; artificial membranes; clay; clay fraction; irradiation; microwave radiation; microwave treatment; nanocomposites; oxygen; permeability; temperature
Abstract:
... Microwave heating was used to prepare poly(ethylene-co-vinyl acetate) (EVA)/clay nanocomposites by solution intercalation. The effects of nanocomposite preparation conditions, such as temperature, irradiation time and clay concentration on the morphology and gas transport properties of EVA membranes were investigated. The microwave irradiation temperature and time did not have any effect on the fi ...
DOI:
10.1016/j.memsci.2011.03.003

40. Performance of SPEEK based polymer–nanoclay inorganic membrane for DMFC

Author:
Juhana Jaafar; A.F. Ismail; T. Matsuura; K. Nagai
Source:
Journal of membrane science 2011 v.382 no.1-2 pp. 202-211
ISSN:
0376-7388
Subject:
X-ray diffraction; artificial membranes; clay; methanol; nanocomposites; physical properties; polymers; scanning electron microscopy
Abstract:
... Sulfonated poly (ether ether ketone) (SPEEK) membrane with degree of sulfonation (DS) of 63% was modified by adding various amounts of Cloisite15A® clay. The effect of clay loading on the physical properties of SPEEK nanocomposite membranes was investigated. SPEEK mixed with 2.5wt.% of Cloisite15A® (SP63/2.5Cl) has been identified as the best composite formulation in this study. Subsequently, vari ...
DOI:
10.1016/j.memsci.2011.08.016