Preparation and application of dense poly(phenylene oxide) membranes in pervaporation

Khayet, M.; Villaluenga, J.P.G.; Godino, M.P.; Mengual, J.I.; Seoane, B.; Khulbe, K.C.; Matsuura, T.

doi:10.1016/j.jcis.2004.06.021

Cited by 78 publications

(51 citation statements)

References 29 publications

(66 reference statements)

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“…In the case of equilibrium sorption and a one-component solvent, c can be estimated by Eq. (4) [17]: Therefore, the fraction of the solvent in the polymer phase increases with decreasing c, i.e., the lower c, the better sorption. Equation (4) can be used for estimating parameters of interaction in binary solvents also on the condition that these parameters are composition-independent [17].…”

Section: Methodsmentioning

confidence: 99%

“…(4) [17]: Therefore, the fraction of the solvent in the polymer phase increases with decreasing c, i.e., the lower c, the better sorption. Equation (4) can be used for estimating parameters of interaction in binary solvents also on the condition that these parameters are composition-independent [17]. To estimate the interaction parameter, we studied the sorption of ethyl acetate, ethanol, and water vapors on the homogeneous membranes.…”

Section: Methodsmentioning

confidence: 99%

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Synthesis of Fullerene-Polyphenylene Oxide Membranes for Separating Aqueous-Organic Mixtures

et al. 2005

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Homogeneous fullerene3polyphenylene oxide membranes containing up to 2 wt % C 60 are synthesized and characterized by the density, electrical resistivity, and contact angle with water and ethanol. The effect of fullerene additive on the transport characteristics of the membranes in pervaporation of water mixtures with ethanol and ethyl acetate is studied.Membrane processes find steadily growing use for purification, concentration, and fractionation of liquid and vapor mixtures. Pervaporation (separation of binary and multicomponent mixtures by evaporation through a membrane) appears to be an efficient process in those cases when the use of conventional methods such as distillation and rectification is impractical or inadvisable (for example, separation of azeotropic mixtures and substances with close physicochemical properties). In pervaporation under reduced pressure, the driving force of transmembrane transport is the pressure gradient controlling the fluxes across the membrane. It is commonly accepted that the model [dissolution3diffusion] most adequately reproduces the mechanism of this process [13 4].The selectivity and efficiency of pervaporation is controlled by such factors as the structure, chemical nature, and composition of the membrane material. The spectrum of commercial pervaporation membranes is rather limited. Therefore, searching for novel high-performance membranes is, without question, of significant scientific and practical interest. In this relation, membranes based on hybrid polymeric materials containing various ultradispersed and nano particles show promise for advanced membrane processes. It is obvious that of primary interest are polymeric composites containing highly physicochemically active substances. In this study we examined thin-film membrabes based on poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) modified with fullerene C 60 .The modification yields PPO3C 60 donor3acceptor complex. Rheological and hydrodynamic study of its solutions revealed that the donor3acceptor bond is strong enough to remain stable upon dilution, despite small decrease in the intrinsic viscosity and broken symmetry of the PPO molecule [5]. It was demonstrated by TGA3MS and differential calorimetry that modification with fullerene improves the heat resistance of PPO [6]. Biryulin et al.[7] studied photoluminescence spectra of C 60 3PPO films. Molecular complexes were found in the films containing up to 2 wt % C 60 , while in the 4% C 60 3PPO films, the major part of fullerene molecules is free.Only a few publications are devoted to properties of fullerene-containing membranes based on poly(trimethylsilylpropyne), polystyrene, and Martimide [8310]. It was demonstrated in our previous studies that the presence of fullerene strongly affects the transport characteristics of polystyrene and PPO in gas separation to enrich air with oxygen, increasing the selectivity and decreasing the permeability [11,12]. In this study we examined the effect of modification with C 60 on physical and pervaporation characteristics of...

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Synthesis of Fullerene-Polyphenylene Oxide Membranes for Separating Aqueous-Organic Mixtures

et al. 2005

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“…GP structure that is used in this study evolved multiple-input, single-output (MISO) models as a new approach in phase equilibrium calculation in polymer solutions for prediction of the activity of solvent in polymer/solvent mixtures from a well set of experimental data that were obtained from the literarture [6,[46][47][48][49][50][51][52]. This data set provides information about solvent activity of various polymer solutions based on the mass fraction of solvent in mixture (wt 1 ).…”

Section: Activity Modelingmentioning

confidence: 99%

“…Totally, 676 experimental equilibrium data were obtained from Refs. [6,[46][47][48][49][50][51][52] for various range of polymer solutions. In order to generalize the GP model, experimental equilibrium data for a large variety of polymer/solvent mixture type such as PEG/water, polystyrene/acetone, polyisobutylene/benzene, PPO/methanol, PDMS/heptane, polyacrylic acid/water, maltodextrin/water, etc.…”

Section: Activity Modelingmentioning

confidence: 99%

A novel approach for estimation of solvent activity in polymer solutions using genetic programming

Tashvigh

Ashtiani

Karimi

et al. 2015

Calphad

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“…This task arises from the joint involvement of these alcohols in a number of syntheses or technological processes; it is aggravated by the fact that these alcohols are very toxic. To separate the methanol -ethylene glycol mixture, membranes based on homopolymers (cellophane, polyphenylene oxide) [2,3], copolymers [4], and binary polymer blends with additional chemical linkage [5] were proposed. The most simple and available of them is poly(2.6-dimethyl-1.4-phenylene oxide) (PPO), however, it is not effective enough as membrane material [3].…”

Section: Introductionmentioning

confidence: 99%

C60 fullerene-containing polymer stars in mixed matrix membranes

Виноградова¹,

Pulyalina

Rostovtseva³

et al. 2016

Nanosystems: Phys. Chem. Math.

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Star-shaped macromolecules with C 60 fullerene branching centers were used as modifiers of poly(2.6-dimethyl-1.4-phenylene oxide) matrix to obtain mixed matrix membranes. Two types of star modifiers were synthesized i) six-arms star with six polystyrene arms grafted onto C 60 center and ii) twelve-arms hybrid star with six polystyrene arms and six copolymer poly(2-vinylpyridine)-block-poly(tert-butylmethacrylate) arms grafted onto C 60 center. The membrane structures were studied by scanning electron microscopy. The transport properties of the membranes were determined by using sorption and pervaporation tests toward methanol and ethylene glycol over a wide concentration range. All membranes showed high affinity for methanol. The separation factor reached its maximum level at 5 wt% modifier concentration in the membrane. Polar hybrid arms were shown to change the membranes' morphologies and considerably improve their transport properties.

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Preparation and application of dense poly(phenylene oxide) membranes in pervaporation

Cited by 78 publications

References 29 publications

Synthesis of Fullerene-Polyphenylene Oxide Membranes for Separating Aqueous-Organic Mixtures

Synthesis of Fullerene-Polyphenylene Oxide Membranes for Separating Aqueous-Organic Mixtures

A novel approach for estimation of solvent activity in polymer solutions using genetic programming

C60 fullerene-containing polymer stars in mixed matrix membranes

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