Optimization of the evaporation step in cellulose acetate membranes preparation by dry-wet phase inversion technique for water desalination applications

2020 ◽  
Vol 174 ◽  
pp. 63-70
Author(s):  
Amira S. Mohammed Ali ◽  
Eman A. Fadl ◽  
Moataz M. Soliman ◽  
Sherif H. Kandil
Keyword(s):  
Cellulose Acetate ◽  
Phase Inversion ◽  
Water Desalination ◽  
Inversion Technique ◽  
Phase Inversion Technique ◽  
Cellulose Acetate Membranes ◽  
Wet Phase Inversion

scholarly journals Effect of Addition of Monosodium Glutamate (MSG) on Coagulation Basin to Characteristics of Cellulose Acetate Membranes

2017 ◽  
Vol 17 (2) ◽  
pp. 83
Author(s):  
Siti Rofiqoh ◽  
Dwi Indarti ◽  
Bambang Piluharto
Keyword(s):  
Membrane Permeability ◽  
Cellulose Acetate ◽  
Phase Inversion ◽  
Monosodium Glutamate ◽  
Water Flux ◽  
Permeability Coefficients ◽  
Inversion Technique ◽  
Morphology Analysis ◽  
Phase Inversion Technique ◽  
Cellulose Acetate Membranes

The aim of recearch is study the effect of MSG in coagulation basin on cellulose acetat membranes properties. It was preparated by phase inversion technique. As the result showed that the higher the concentration of MSG in coagulation basin, which is character of membrane permeability coefficients and lower water flux. Dextran rejection of 11, 40, 100-200, and 500 kDa increased. The morphology analysis has shown that sub layer membranes structure with 2% MSG addition more uniform than 0,5% MSG addition.Keywords: cellulose acetat, phase inversion, MSG, coagulation basin

scholarly journals Effect of Methanol Concentration on the Performance of Asymmetric Cellulose Acetate Reverse Osmosis Membranes Using Dry/Wet Phase Inversion Technique

2012 ◽  
Author(s):  
Ani Idris ◽  
Ahmad Fauzi Ismail ◽  
S. Iswandi ◽  
Simon J. Shilton
Keyword(s):  
Cellulose Acetate ◽  
Reverse Osmosis ◽  
Phase Inversion ◽  
Pure Water ◽  
Permeation Rate ◽  
Transport Parameter ◽  
Water Permeation ◽  
Inversion Technique ◽  
Phase Inversion Technique ◽  
Wet Phase Inversion

Membran asimetrik telah dihasilkan daripada larutan polimer multikomponen yang terdiri daripada selulosa asetat, aseton formamid dan metanol. Dalam kajian ini, teknik fasa balikan kering/basah telah digunakan dan kehadiran metanol dikaji. Selain itu, kajian ini juga mengemukakan isu asas yang terlibat dalam pengubahsuaian larutan tuangan kepingan rata, bagi menghasilkan larutan yang berpotensi untuk digunakan bagi penyediaan membran gentian geronggang, yang mempunyai lapisan memilih yang bebas daripada kecacatan. Pengubahsuaian komposisi larutan multikomponen telah menghasilkan membran osmosis balikan yang berbeza prestasinya. Prestasi membran ditentukan secara uji kaji oleh pemboleh ubah asas seperti fluks air tulen (PWP), kadar kebolehtelapan air garam (PR) dan kadar buangan. Daripada data tersebut, parameter sekunder seperti pemalar kebolehtelapan air tulen (A), parameter pengangkutan bahan larut (DAM /Kδ) dan pekali pemindahan jisim (k) dapat ditentukan. Parameter tersebut adalah penting dalam meramal prestasi membran osmosis balikan dan pencirian morfologi membran. Keputusan uji kaji menunjukkan bahawa kehadiran metonal dalam formulasi larutan polimer telah meningkatkan kadar buangan dan aliran fluks. Nilai (DAM/Kδ) yang lebih rendah bagi larutan rujukan menunjukkan bahawa purata saiz liang pada permukaan membran secara bandingan adalah lebih kecil. Kata kunci: Asimetrik membran; osmosis balikan; selulosa asetat; fasa balikan. Asymmetric membranes were prepared from a multicomponent dope polymer solution consisting of cellulose acetate, acetone, formamide and methanol. In this work, the dry/wet phase inversion technique is used and the presence of methanol is studied. In addition, this work also presents the fundamental issues involved in altering flat sheet casting solutions to produce solutions, potentially useful for preparing hollow fibers within, defect free selective layers. Variations in the composition of multicomponent casting solution resulted in membranes with drastically different reverse osmosis performance. The membrane performance are determined experimentally by primary parameters such as the pure water permeation rate (PWP), salt permeation rate (PR) and rejection rates. From these data, the secondary parameter such as pure water permeability constant (A), solute transport parameter (DAM/Kδ) and mass transfer coefficient (k) are determined. These parameters are important in the prediction of reverse osmosis performance and also in characterising membrane morphology. The results revealed that the presence of methanol in the dope formulation increases the percentage of salt rejection and flux flow. The relatively lower value of (DAM /Kδ) for a reference solute indicates a relatively a relatively smaller average pore size on the membrane surface. Key words: Asymmetric membrane; reverse osmosis; cellulose acetate; dry/wet phase inversion

On the search of rigorous thermo-kinetic model for wet phase inversion technique

2017 ◽  
Vol 538 ◽  
pp. 18-33 ◽  
Author(s):  
Milad Asgarpour Khansary ◽  
Azam Marjani ◽  
Saeed Shirazian
Keyword(s):  
Kinetic Model ◽  
Phase Inversion ◽  
Inversion Technique ◽  
Phase Inversion Technique ◽  
Wet Phase Inversion

scholarly journals Cellulose Acetate Membranes characters Due To Additions Additive Monosodium Glutamate (MSG)

2013 ◽  
Vol 14 (1) ◽  
pp. 33 ◽  
Author(s):  
Dwi Indarti ◽  
I Nyoman Adi Winata ◽  
Heny Yunita Novianti
Keyword(s):  
Membrane Permeability ◽  
Cellulose Acetate ◽  
Phase Inversion ◽  
Monosodium Glutamate ◽  
Water Flux ◽  
Membrane Preparation ◽  
Permeability Coefficients ◽  
Phase Inversion Technique ◽  
Cellulose Acetate Membranes ◽  
Membrane Density

This study purposed to determine the effect of MSG on the character of cellulose acetate membranes. This membrane preparation using phase inversion technique. The results showed that the higher the concentration of MSG, which is the character of membrane permeability coefficients and higher water flux, whereas for the character of the membrane density test and 100-200 kDa dextran rejection further down. To test the FTIR proved that there are no additives or solvents are trapped in a membrane. Keywords : Cellulose Acetate, phase inversion, MSG, FTIR  

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