Novel solvent exchange cum immersion precipitation technique for the preparation of asymmetric polymeric membrane

Bindal, R.C.; Hanra, M. S.; Misra, Β. M.

doi:10.1016/0376-7388(96)00073-7

Cited by 13 publications

(10 citation statements)

References 7 publications

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“…For instance, it is expected that the system become two phases adding some water to homogenous solution of polymer and solvent; this is due to the fact that water is not able to dissolve the polymer. This phenomenon intensifies the solvent removing from polymer film and makes a thick and high‐porosity membrane 20,21 . As it was mentioned, during phase inversion process both thermodynamic and kinematic aspects play important roles and have to be considered simultaneously that makes the process more complex.…”

Section: Introductionmentioning

confidence: 99%

Manipulating of polyacrylonitrile membrane porosity via SiO₂ and TiO₂ nanoparticles: Thermodynamic and experimental point of view

Hamta

Ashtiani

Karimi

et al. 2020

Polymers for Advanced Techs

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In this work, the membrane formation of the polyacrylonitrile (PAN) was investigated in the presence of different solvents named N‐methyl‐2‐pyrrolidone (NMP) and dimethylformamide (DMF). In this way, two ternary systems water/NMP/PAN and water/DMF/PAN were studied and compared both experimentally and thermodynamically. According to the binodal data, changing the solvent from NMP to DMF could expand the two‐phase region, which was proved by Hansen solubility parameters. The binodal data were predicted and the results showed that the Flory‐Huggins results are in good agreement with experimental data with less than 2% deviation, which is important to have a rational design of porous membrane and appropriate prediction of its morphology. Furthermore, the effects of TiO2 and SiO2 nanoparticles were investigated on dope solution viscosity, thickness, porosity and contact angle of the membranes in both solvents. The results showed that the pattern of changes in characteristics was similar using each nanoparticle. Lower concentrations of nanoparticles enhance the porosity of the membranes and above the optimum amount, adding the NPs leads to decrement the porosity of the nanocomposite membranes. Finally, the fluxes of the manufactured membranes in both cases were examined using distilled water or oil‐in‐water emulsion as feed. The initial permeate flux of oil‐in‐water emulsion was increased from 62 to 73 L m−2 hr−1 using the membrane fabricated by DMF instead of NMP and this fact showed that the PAN membranes potentially can be used for oil/water separation due to the low fouling and hence, the low flux drop during the time.

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Section: Introductionmentioning

confidence: 99%

Manipulating of polyacrylonitrile membrane porosity via SiO₂ and TiO₂ nanoparticles: Thermodynamic and experimental point of view

Hamta

Ashtiani

Karimi

et al. 2020

Polymers for Advanced Techs

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“…As coagulation bath temperature increases, the PWFs increase, while RR of the PEI/DMAc/BuOH membrane decreases and that of the PEI/DMAc/GBL membrane keeps constant. It is known that fast diffusion velocity of the solvent DMAc, additive and the nonsolvent water at high coagulation bath temperature results in high porosity of the membrane [41,42], which is responsible for the increase of PWF. Besides, since molecular size of BuOH (0.66 nm, calculated by materials studio) is larger than DMAc (0.49 nm), fast leaching of additive BuOH leads to larger pore size, which brings on lower RR of PEI/DMAc/BuOH membrane.…”

Section: Prediction Of the Effects Of Preparation Conditions On Membrmentioning

confidence: 99%

Optimization of ultrafiltration membrane fabrication using backpropagation neural network and genetic algorithm

Tan

Nie

et al. 2014

Journal of the Taiwan Institute of Chemical Engineers

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“…Semipermeable membranes prepared from several wholly aromatic PAHs exhibited excellent sodium chloride rejection, via reverse osmosis technique, from its aqueous solution. 12 –15,34,57 –59 These membranes also had high selectivity toward other solutes, particularly, sodium sulfate, magnesium chloride, and glucose, 60 ammonium chloride, 17 ammonium nitrate, sodium acetate, sodium oxalate, and sodium tetraborate, 17 some alcohols, ethers, ketones, and aldehydes. 8…”

Section: Wholly Aromatic Pahs Membranes For Reverse Osmosis Separationsmentioning

confidence: 99%

High-performance wholly aromatic polyamide–hydrazides

Elsabeé

Morsi

Selim³

2017

High Performance Polymers

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The review summarizes the various methods of preparing wholly aromatic polyamide–hydrazides (PAHs). Polyhydrazides are a class of polymers that possess in their repeating units one amide (–NHOC–) and one hydrazide (–CONHNHOC–) linking bond between appropriate aromatic nuclei. The review provides several figures of different molecular structures of PAH and expounds the methods of polymerization, low, high temperature, and phosphorylation polycondensation methods. Polyhydrazides exhibit some unique and potentially useful properties such as outstanding thermal and thermo-oxidative resistance, very high mechanical strength, and ultrahigh moduli. PAHs undergo structural transformation into poly(amide-1,3,4-oxadiazole)s upon heating, which are also considered highly thermally stable polymers. The review presents a description of the structure–property relation of PAHs. The application of PAHs in reverse osmosis applications has been discussed, as well as the preparation of fibers and metallized PAHs films. Modification of the PAH with carbon nanotubes and graphene and the future prospects for PAHs were introduced with comprehensive references pertaining to this area of research.

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Novel solvent exchange cum immersion precipitation technique for the preparation of asymmetric polymeric membrane

Cited by 13 publications

References 7 publications

Manipulating of polyacrylonitrile membrane porosity via SiO₂ and TiO₂ nanoparticles: Thermodynamic and experimental point of view

Manipulating of polyacrylonitrile membrane porosity via SiO₂ and TiO₂ nanoparticles: Thermodynamic and experimental point of view

Optimization of ultrafiltration membrane fabrication using backpropagation neural network and genetic algorithm

High-performance wholly aromatic polyamide–hydrazides

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Novel solvent exchange cum immersion precipitation technique for the preparation of asymmetric polymeric membrane

Cited by 13 publications

References 7 publications

Manipulating of polyacrylonitrile membrane porosity via SiO2 and TiO2 nanoparticles: Thermodynamic and experimental point of view

Manipulating of polyacrylonitrile membrane porosity via SiO2 and TiO2 nanoparticles: Thermodynamic and experimental point of view

Optimization of ultrafiltration membrane fabrication using backpropagation neural network and genetic algorithm

High-performance wholly aromatic polyamide–hydrazides

Contact Info

Product

Resources

About

Manipulating of polyacrylonitrile membrane porosity via SiO₂ and TiO₂ nanoparticles: Thermodynamic and experimental point of view

Manipulating of polyacrylonitrile membrane porosity via SiO₂ and TiO₂ nanoparticles: Thermodynamic and experimental point of view