Preparation and characterization of cellulose acetate/carboxymethyl cellulose acetate blend ultrafiltration membranes

Han, Baixin; Zhang, Dalun; Shao, Ziqiang; Kong, Linlin; Lv, Shanshan

doi:10.1016/j.desal.2012.11.002

Cited by 114 publications

(58 citation statements)

References 41 publications

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“…The values obtained for the BSA rejection and water flux recommend the use of these membranes for ultrafiltration processes with potential applications in proteins retention, colloidal aggregates, saccharides and polysaccharides, or macromolecular compounds. The CA/GO composite membranes showed superior behavior for the rejection of BSA in comparison with other CA membranes [36] or even other composite CA membranes, [37] the average retention being around 75-80%. Another potential explanation in the case of our composite membranes could be the weak interaction between GO surface in the membrane pores and first protein molecules which penetrate the active surface of the membrane (interaction between delocalized electrons at the surface of graphene and non-participants electrons from protein functional groups).…”

Section: Fluxesmentioning

confidence: 93%

Fabrication of cellulose triacetate/graphene oxide porous membrane

Ioniță

Crică

Voicu

et al. 2015

Polym. Adv. Technol.

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Cellulose triacetate (AC)/graphene oxide (GO) porous membranes were successfully fabricated by combining ultrasonication and phase inversion method. The structures and morphologies of the resultant composite membranes were investigated by X-ray diffraction (XRD), scanning electron microscopy, and transmission electron microscopy, respectively. Microscopic and X-ray diffraction measurements revealed that GO sheets were uniformly dispersed within the AC matrix. The pore size and structure were modulated by changing GO concentration from 0.25 to 1 wt%. Membrane thermal properties were also studied. Among all tested membranes, the most favorable GO amount was 1 wt%, giving Td 3% of 274°C, which represents a 22°C enhancement compared with AC. Conversely, the membranes showed improved barrier properties against water and ethanol. The decrease of both ethanol and water fluxes was assigned to the stabilization of composite membrane structure, as a result of GO progressive addition. Bovine serum albumin rejection assay indicated an increasing from 78% in the case of CA membrane to 99% in the case of CA/GO 1 wt% of the rejection degree after 90 min.

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Section: Fluxesmentioning

confidence: 93%

Fabrication of cellulose triacetate/graphene oxide porous membrane

Ioniță

Crică

Voicu

et al. 2015

Polym. Adv. Technol.

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“…Being membrane materials, the polymers should demonstrate thermal stability over a wide range of temperature and a chemical stability over a range of pH, and possess a strong mechanical strength. The polymers that are suitable for making membranes include cellulose acetate 3,4 , polyamides 5,6 , polysulfones 7,8 , sulfonated polysulfones 9,10 , etc.. Polysulfones are mainly used to form ultrafiltration, microfiltration and gas separation membranes. They are also used to form the porous support layer of many reverse osmosis, nanofiltration and some gas separation 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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“…The blending of CA with an appropriate polymer is expected to produce enhanced separation performance, such as a higher flux and better selectivity. 15 Cellulose is the most abundant renewable polymer resource in the biosphere; it has many advantages, including biodegradability, low cost, and environmental friendliness. Cellulose nanocrystals (CNCs) exhibit a very high strength and high hydrophilicity when they are prepared by chemical or physical methods.…”

Section: Introductionmentioning

confidence: 99%

Cellulose acetate ultrafiltration membranes reinforced by cellulose nanocrystals: Preparation and characterization

Zhou

Chen

et al. 2016

J of Applied Polymer Sci

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Cellulose nanocrystals (CNCs) were used as a sustainable additive to improve the hydrophilicity, permeability, antifouling, and mechanical properties of blend membranes. Different CNC loadings (0-1.2 wt %) in cellulose acetate (CA) membranes were studied. The blend membranes were prepared by a phase-inversion process, and their chemical structure and morphological properties were characterized by attenuated total reflectance-Fourier transform infrared spectroscopy, scanning electron microscopy, porosity, and mean pore size and contact angle measurement. The blend membranes became more porous and more interconnected after the addition of CNCs. The thickness of the top layer decreased and a few large holes in the porous substrate appeared with increasing CNC loading. In comparison with the pure CA membranes, the pure water flux of the blend membranes increased with increasing CNC loading. It reaches a maximum value of 76 LÁm 22 Áh 21 when the CNC loading was 0.5 wt %. The antifouling properties of the CA membrane were significantly improved after the addition of CNCs, and the flux recovery ratio value increased to 68% with the addition of 0.5 wt % CNCs. In comparison with that of the pure CA membranes, the tensile strength of the composite membranes increased by 47%. This study demonstrated the importance of using sustainable CNCs to achieve great improvements in the physical and chemical performance of CA ultrafiltration membranes and provided an efficient method for preparing high-performance membranes.

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Preparation and characterization of cellulose acetate/carboxymethyl cellulose acetate blend ultrafiltration membranes

Cited by 114 publications

References 41 publications

Fabrication of cellulose triacetate/graphene oxide porous membrane

Fabrication of cellulose triacetate/graphene oxide porous membrane

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

Cellulose acetate ultrafiltration membranes reinforced by cellulose nanocrystals: Preparation and characterization

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