Preparation, structure and properties of nanocomposite membranes prepared by phase inversion

Polymeric membranes were produced from the nanocomposites of polyethersulfone and clay (untreated-MMT and treatment-OMMT), by phase inversion technique, in the proportions of 3 and 5% w/w, using as the solvent N, N dimethylformamide (DMF). From XRD results it was noted a change in the structure of the MMT by organophilization process with increase of the interplanar basal distance. To the membranes it was observed an exfoliated and/or partially exfoliated structure. From SEM images the nanocomposite membranes showed a surface apparently exempt of pores, however in the cross-section images shows an anisotropic structure, where the skin is dense and the porous support displays macrovoids. By the flow measurement, it was found that the compositions presented the same tendency in the flow lines, where the flow is high on the beginning and drops over time; and the inclusion of clay increases the flow, especially to the membranes with MMT 5%.

Download Full-text

Preparation and Characterization of Cellulose Carbamate Regeneration Membrane by Supercritical Carbon Dioxide

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.821-822.1031 ◽

2013 ◽

Vol 821-822 ◽

pp. 1031-1034

Author(s):

Xu Wang ◽

Hai Yan Wu ◽

Cui Yu Yin

Keyword(s):

Phase Inversion ◽

Solution Concentration ◽

Coagulation Bath ◽

Regenerated Cellulose ◽

Structure And Properties ◽

Inversion Process ◽

X Ray ◽

Cellulose Carbamate ◽

Phase Inversion Process

The regenerated cellulose carbamate membranes were prepared by the phase inversion process. The structure and properties of the regenerated cellulose carbamate membranes were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffractometry (XRD) and scanning electron microscopy (SEM). Besides, the effects of the casting solution concentration and the coagulation bath concentration on the mechanical property of regenerated cellulose carbamate membrane were discussed.

Download Full-text

Properties of Polysulfone/Halloysite Nanocomposite Membranes: Prepared by Phase Inversion Method

Macromolecular Symposia ◽

10.1002/masy.201500003 ◽

2016 ◽

Vol 361 (1) ◽

pp. 11-19 ◽

Cited By ~ 2

Author(s):

Swapna V.P. ◽

Saranya E.P. ◽

Nithya A.B. ◽

Sabu Thomas ◽

Ranimol Stephen

Keyword(s):

Phase Inversion ◽

Inversion Method ◽

Nanocomposite Membranes ◽

Phase Inversion Method

Download Full-text

Study of Morphology Membrane of Polymeric Nanocomposites Obtained by Phases Inversion

Materials Science Forum ◽

10.4028/www.scientific.net/msf.775-776.498 ◽

2014 ◽

Vol 775-776 ◽

pp. 498-503 ◽

Cited By ~ 7

Author(s):

Keila Machado Medeiros ◽

Taciana Regina de Gouveia Silva ◽

Dayanne Diniz Souza Morais ◽

Luana Rodrigues Kojuch ◽

Edcleide Maria Araújo ◽

...

Keyword(s):

Polymer Nanocomposites ◽

Phase Inversion ◽

Structural Modification ◽

Bentonite Clay ◽

Polymeric Nanocomposites ◽

X Ray Diffraction ◽

Nanocomposite Membranes ◽

Scanning Calorimetry ◽

Selective Layer ◽

X Ray

In this work, were obtained nanocomposite membranes polyamide66/Paraíba bentonite clay, treated with a quaternary ammonium salt in order to make it organophilic. The membranes were prepared as thin films using the technique of phase inversion from the nanocomposites obtained by solution. The membranes were characterized by X-ray diffraction (XRD), differential scanning calorimetry (DSC), thermogravimetry (TG) and scanning electron microscopy (SEM). By means of X-ray diffractogram, it was revealed that the membranes remained organically treated clay presented exfoliated and/or partially exfoliated structure. From curves of DSC and TG, it was observed that membrane of PA66 with 3% w/w of with treatment clay showed higher thermal stability compared with the same content of clay without treatment. From the SEM photomicrographs, there was a selective layer (skin filter) on top and one porous layer at the bottom of all membranes studied. Moreover, it was verified that the presence of clay provided a significant structural modification in the membranes of polymer nanocomposites.

Download Full-text

Effect of postcasting heat-treatment on the structure and properties of semicrystalline phase-inversion poly(vinylidene fluoride) membranes

Journal of Polymer Science Part B Polymer Physics ◽

10.1002/polb.21791 ◽

2009 ◽

Vol 47 (19) ◽

pp. 1880-1893 ◽

Cited By ~ 14

Author(s):

Dar-Jong Lin ◽

Hsu-Hsien Chang ◽

Konstantinos Beltsios ◽

Trong-Ming Don ◽

Yi-Su Jeng ◽

...

Keyword(s):

Heat Treatment ◽

Phase Inversion ◽

Vinylidene Fluoride ◽

Structure And Properties ◽

Poly Vinylidene Fluoride

Download Full-text

Cellulose Blended Membranes for High-Salinity Water Pervaporation Desalination

Engineering Proceedings ◽

10.3390/engproc2021012057 ◽

2021 ◽

Vol 12 (1) ◽

pp. 57

Author(s):

Jawad Fareed ◽

Muhammad Zafar ◽

Mohsin Saleem ◽

Rizwan Ahmed Malik ◽

Muddassir Ali

Keyword(s):

Phase Inversion ◽

Water Flux ◽

Cellulose Triacetate ◽

Zro2 Nanoparticles ◽

Nanocomposite Membranes ◽

Feed Concentration ◽

High Salinity Water ◽

Maximum Water ◽

Salinity Water ◽

Tga And Dsc

In the current study, cellulose acetate (CA)/cellulose triacetate (CTA) nanocomposite membranes blended with zirconium dioxide (ZrO2) are prepared via phase inversion for pervaporation desalination performance. ZrO2 nanoparticles are added to enhance the hydrophilicity and porosity of the nanocomposite membranes. The fabricated nanocomposite membranes are characterized by SEM, FTIR, TGA, and DSC to study the surface morphology, chemical composition, thermal stability and strength. Nanocomposite membranes’ performance for pervaporation desalination is assessed as a function of feed concentration. Pervaporation results revealed that the nanocomposite membrane consisting of 2% ZrO2 achieved a maximum water flux of 6.5 kg/m2h, whereas the salt rejection was about 99.8%.

Download Full-text

ZnO Nanocomposite Membranes for Desalination

Journal of Applied Membrane Science & Technology ◽

10.11113/amst.v21i1.108 ◽

2017 ◽

Vol 21 (1) ◽

Author(s):

A. M. Vijesh ◽

J. Liya ◽

P. C. Shyma

Keyword(s):

Zinc Oxide ◽

Drinking Water ◽

Phase Inversion ◽

Inversion Method ◽

Zno Nanoparticle ◽

Nanocomposite Membranes ◽

Membrane Performance ◽

Blend Membranes ◽

The World ◽

Phase Inversion Method

Severe drinking water scarcity is a major problem around the world and pressure driven membrane processes are gaining importance in the field of water purification. This work mainly focuses on improving membrane performance in terms of hydrophilicity, solute rejection, etc. It emphasizes on the preparation of polysulfone (PSf) based blend membranes via phase inversion method. PSf membrane is modified by the addition of zinc oxide (ZnO) nanoparticle at various compositions and the resultant membrane performances were studied. The PSf-ZnO membranes were characterized by ATR-IR and SEM. These membranes showed much better salt rejection performance.

Download Full-text