Physicochemical characterization of a modified cellulose acetate membrane for the design of oil-in-water emulsion disruption devices

Barbar, Reine; Durand, A.; Ehrhardt, J.J.; Fanni, Jacques; Parmentier, Michel

doi:10.1016/j.memsci.2007.11.031

Cited by 8 publications

(7 citation statements)

References 28 publications

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“…The corresponding positions of peak binding energies and their values (% area ratio) were also listed in Table 2. For un-modified CA nanofibers, C 1s spectrum is deconvoluted into four subpeaks assigned to C-(C, H) at 284.62 eV, C-O at 286.28 eV, O-C-O at 287.62 eV and O C-O at 289.22 eV [49]. After the first step of modification, the C 1s spectrum ( Fig.…”

Section: Structural Surface Characterization Of Nanofibersmentioning

confidence: 99%

Cyclodextrin-grafted electrospun cellulose acetate nanofibers via “Click” reaction for removal of phenanthrene

Çelebioğlu

Demirci

Uyar

2014

Applied Surface Science

118

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a b s t r a c tBeta-cyclodextrin (␤-CD) functionalized cellulose acetate (CA) nanofibers have been successfully prepared by combining electrospinning and "click" reaction. Initially, ␤-CD and electrospun CA nanofibers were modified so as to be azide-␤-CD and propargyl-terminated CA nanofibers, respectively. Then, "click" reaction was performed between modified CD molecules and CA nanofibers to obtain permanent grafting of CDs onto nanofibers surface. It was observed from the SEM image that, while CA nanofibers have smooth surface, there were some irregularities and roughness at nanofibers morphology after the modification. Yet, the fibrous structure was still protected. ATR-FTIR and XPS revealed that, CD molecules were successfully grafted onto surface of CA nanofibers. The adsorption capacity of ␤-CD-functionalized CA (CA-CD) nanofibers was also determined by removing phenanthrene (polycyclic aromatic hydrocarbons, PAH) from its aqueous solution. Our results indicate that CA-CD nanofibers have potential to be used as molecular filters for the purpose of water purification and waste water treatment by integrating the high surface area of nanofibers with inclusion complexation property of CD molecules.

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Section: Structural Surface Characterization Of Nanofibersmentioning

confidence: 99%

Cyclodextrin-grafted electrospun cellulose acetate nanofibers via “Click” reaction for removal of phenanthrene

Çelebioğlu

Demirci

Uyar

2014

Applied Surface Science

118

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“…Among these polymers, the methylcellulose is classified as an amphiphilic natural plant-based polymer 23 and can be used as an additive to prepare membranes 24 . A new membrane prepared from modified methylcellulose/ cellulose acetate mixture was used to separate the emulsion oil in water 25 . Gcina et al 26 used a lignin as an additive to probe the mechanical and thermal properties of polysulfone membranes.…”

Section: Introductionmentioning

confidence: 99%

Effects of Methylcellulose on the Properties and Morphology of Polysulfone Membranes Prepared by Phase Inversion

et al. 2017

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Polymer solutions of polysulfone (PSf) and methylcellulose (MC) in 1-methyl-2-pyrrolidone (NMP) were used to prepare ultrafiltration membranes by the phase inversion technique via immersion precipitation. The effect of MC additive on the structure and performances of the membranes was studied. The obtained membranes were characterized by scanning electron microscopy (SEM), differential scanning calorimetry (DSC), infrared spectroscopy (FTIR-ATR), equilibrium water content (EWC), water contact angle, porosity and ultrafiltration experiments of polyethylene glycol solutions. It was found that all the PSf/MC membranes had higher porosity, more hydrophilic surface and more vertically finger like pores than PSf membrane. With an increase in MC content in the casting solution from 0.5% to 1.5%, the hydraulic permeability increases from 17.17 to 118.46 L.m -2 .h -1 .bar -1 , while the rejection decreases from 91.82% to 64.45% with PEG 35000. DSC scan and FTIR analysis confirmed that methylcellulose was trapped in the membranes matrix.

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“…XPS, also known as electron spectroscopy for chemical analysis (ESCA), is one of the most effective spectroscopic techniques available for surface analysis of polymers. − XPS is based on an X-ray induced emission of electrons (the photoelectric effect) which are observed according their kinetic energy. The kinetic energy is characteristic of elements and their binding state.…”

Section: Resultsmentioning

confidence: 99%

Ion-Pair Formation and Ion-Specific Flux of a Weak Polyelectrolyte Membrane

Sun

Wang

et al. 2009

J. Phys. Chem. B

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Poly(2-dimethylamino ethyl methacrylate) (PDMAEMA) is a weak cationic polyelectrolyte in aqueous solution which was incorporated in the porous poly(acrylonitrile and 2-dimethylamino ethyl methacrylate) (PAN-DMAEMA) membrane. The signals of the formation of ion-pair complexes between protonated DMAEMA groups and anions of the added salts were clearly observed in the X-ray photoelectron spectroscopy (XPS) spectra of the PAN-DMAEMA membrane. Since the electrostatic interactions between propotated DMAEMA groups and anions are highly dependent on the valency of anions, which influences the conformation of PDMAEMA and pore sizes of membrane, ion-specific flux was found for the PAN-DMAEMA membrane. At the same salt concentration, water fluxes of the PAN-DMAEMA membrane are enhanced in the order of trivalent > divalent > monovalent anions.

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Physicochemical characterization of a modified cellulose acetate membrane for the design of oil-in-water emulsion disruption devices

Cited by 8 publications

References 28 publications

Cyclodextrin-grafted electrospun cellulose acetate nanofibers via “Click” reaction for removal of phenanthrene

Cyclodextrin-grafted electrospun cellulose acetate nanofibers via “Click” reaction for removal of phenanthrene

Effects of Methylcellulose on the Properties and Morphology of Polysulfone Membranes Prepared by Phase Inversion

Ion-Pair Formation and Ion-Specific Flux of a Weak Polyelectrolyte Membrane

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