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paper25

 

Asymmetric Cellulose Acetate Dialysis Membranes Synthesis, Characterization, and Performance

Ehsan Saljoughi, Mohammad Amirilargani, Toraj Mohammadi

 

ABSTRACT

were determined and investigated. In general, increasing the PEG concentration and CBT and reducing the CA concentration resulted in increased PWP and insulin/HSA transmission. Also, these variations facilitated the formation of macrovoids in the membrane sublayer. On the

other hand, increasing the PEG and CA concentrations and reducing CBT resulted in increased thermal and chemical stability of the prepared membranes. Also, ratios of 15.5/10/74.5 and 17.5/10/72.5 (w/w) for the CA/PEG NMP casting solutions and their immersion into coagulation

baths with CBTs of 0 and 25

and chemical stability better than that of conventional CA hemodialysis membranes

Cellulose acetate (CA) is highly comparable to other synthetic polymer materials and is effective in the hemodialysis process. In this work, asymmetric CA membranes were synthesized with the phase-inversion method CA with a molecular weight of 52,000, poly(ethylene glycol (PEG) with a molecular weight of 400, and 1-methyl 2-pyrrolidone NMP) were used as the polymer, additive and solvent, respectively. The effects of the CA and PEG concentrations and coagulation bath temperature (CBT) on the morphology, pure water permeability (PWP), insulin human serum albumin (HSA) transmission, and finally thermal and chemical stability of the prepared membranesC, respectively, resulted in the preparation of membranes that had not only optimum sieving properties and higher PWP but also therma

Journal ofAppliedPolymer Science,Vol. 116, 2251–2259 -2010

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