scholarly journals Preparation and Characterization of Asymmetric Ultrafiltration Membrane for Lysozyme Separation: Effect of Polymer Concentration

2017 ◽  
Vol 11 (1) ◽  
Author(s):  
A. Nora’aini ◽  
H. Sofiah ◽  
A. Asmadi ◽  
M. Abdul Wahab
Keyword(s):  
Phase Inversion ◽  
Protein Production ◽  
Polymer Concentration ◽  
Downstream Processing ◽  
High Yield ◽  
Membrane Performance ◽  
Phase Inversion Technique ◽  
Wet Phase Inversion ◽  
And Performance

Penetrations of membrane technology in the downstream processing of protein production are now well accepted due its effectiveness and ability to generate high yield of product. This study aimed to investigate the effects of polymer concentrations on morphology and performance of ultrafiltration membranes for lysozyme separation. Three membrane solutions with different polymer concentration of Polyehtersulfone/N–Methyl pyrolidone/water with 15% w/w, 17% w/w and 19% w/w (15% [UF 15], 17% [UF 17] and 19% [UF 19]) were used to prepare asymmetric flat sheets membranes via a simple dry/wet phase inversion technique. The data obtained shows that the permeability coefficient decreased from 10.9 × 10–6 to 0.44 × 10–6m3/m2.s.bar with increasing polymer concentrations. UF 15 membrane discovers the highest flux and lysozyme transmission, consequently promoted this membrane as an optimum membrane for lysozyme separation. This study proves that the polymer concentration was greatly affected the membrane performance and structural properties consecutively, promoted an improvement of UF membrane capability for lysozyme separation.

scholarly journals Synthesis and Characterization of Novel Integral Asymmetric Monophasic Cellulose–Acetate/Silica/Titania and Cellulose–Acetate/Titania Membranes

Membranes ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 195 ◽  
Author(s):  
Inês Peixoto ◽  
Mónica Faria ◽  
M. Clara Gonçalves
Keyword(s):  
Cellulose Acetate ◽  
Phase Inversion ◽  
Sol Gel ◽  
Asymmetric Structure ◽  
Hydraulic Permeability ◽  
Icp Oes ◽  
Phase Inversion Technique ◽  
In Series ◽  
Covalently Bound

Two series of novel integral asymmetric monophasic hybrid membranes, cellulose acetate/silica/titania (CA/SiO2/TiO2—series 1) and cellulose acetate/titania (CA/TiO2—series 2), were developed by the coupling of sol-gel technology and a modified version of the phase inversion technique. SEM micrographs confirmed the integral asymmetric structure of all membranes. ATR-FTIR and ICP-OES results showed that, for the membranes in series 1, TiO2 is covalently bound to SiO2, which, in turn, is covalently bound to CA, while for the membranes in series 2, TiO2 is directly and covalently bound to the CA matrix. Permeation experiments revealed that the permeation performance of the membranes in series 1 is unaffected by the introduction of TiO2. In contrast, the introduction of TiO2 in the series 2 membranes increased the hydraulic permeability by a factor of at least 2 when compared to the pristine CA membrane and that incremental additions of TiO2 further increased the Lp.

scholarly journals Fabrication and Characterization of Polycaprolactone / Nanozeolite Membrane Films via Phase Inversion Technique

2020 ◽  
Vol 894 ◽  
pp. 012004
Author(s):  
Ruth R Aquino ◽  
Marvin S Tolentino ◽  
MariaJenina S Foronda ◽  
Deseree A Mata ◽  
Keille Peter B Susbilla
Keyword(s):  
Phase Inversion ◽  
Inversion Technique ◽  
Phase Inversion Technique ◽  
Fabrication And Characterization

Characterization of DNA-loaded porous polyethersulfone particles prepared by phase inversion technique

2005 ◽  
Vol 67 (2) ◽  
pp. 140-145 ◽  
Author(s):  
Changsheng Zhao ◽  
Kaiguang Yang ◽  
Xuesong Zhou ◽  
Yi Lei ◽  
Gang Yang ◽  
...  
Keyword(s):  
Phase Inversion ◽  
Inversion Technique ◽  
Phase Inversion Technique

Rheology Assessment of PSf/ NMP Solution and its Influence on Membrane Structure

2012 ◽  
Vol 326-328 ◽  
pp. 422-427 ◽  
Author(s):  
Priscila Anadão ◽  
Rafael Rezende Montes ◽  
Henrique Souza de Santis ◽  
Hélio Wiebeck
Keyword(s):  
Membrane Structure ◽  
Phase Inversion ◽  
Molar Mass ◽  
Polymer Concentration ◽  
Inversion Method ◽  
Asymmetric Membranes ◽  
Wet Phase Inversion ◽  
Microfiltration Membranes ◽  
Skin Formation ◽  
Phase Inversion Method

Asymmetric polysulfone membranes were prepared by wet-phase inversion method from casting solutions consisting of PSf/NMP and water as non-solvent. The effects of polymer concentration and molar mass were investigated by rheological studies. Moreover, membranes were characterized by scanning electron microscope (SEM). It was found that polymer solutions containing between 22 and 25 wt% PSf/NMP originated microfiltration membranes. The use of a higher mass molar polysulfone has been shown to reduce diameter pore and to maintain morphology. All the results were interrelated into a discussion of the skin formation of asymmetric membranes.

Synthesis and Characterization of Polysulfone/Montmorillonite (PSF/MMT) Mixed Matrix Membrane for Gas Separation

2014 ◽  
Vol 925 ◽  
pp. 18-22 ◽  
Author(s):  
P.C. Oh ◽  
N.A. Mansur
Keyword(s):  
Phase Inversion ◽  
Deionized Water ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix Membrane ◽  
Inversion Method ◽  
Mixed Matrix ◽  
Flat Sheet ◽  
Wet Phase Inversion ◽  
Phase Inversion Method

In this paper, flat sheet polysulfone (PSF) membrane and polysulfone/montmorillonite (PSF/MMT) mixed matrix membranes with different MMT contents were prepared by dry-wet phase inversion method.N-methyl-2-pyrrolidone (NMP) and deionized water were used as a solvent and coagulant, respectively. The morphology and structure of membranes were analyzed by scanning electron microscope. Thermogravimetric analysis was also performed to examine the thermal decomposition of the synthesized membrane. Results showed that MMT had a good dispersion in the PSF matrix.

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