Ultrafiltration Formulation of Cellulose Acetate / Polysulfone Blended Membrane

Abstract

Membrane has been used widely in developed countries and most of researchers focus on the development of membrane formulation. However, different materials with different portion give a various effects on the membrane morphology and performances. Hence, blend polymer is one of the method that can be explored to produce the best membrane performance. This present study aims to identify an ideal formulation of blend polymers in membrane fabrication process. Dope solution was prepared using these materials; cellulose acetate (CA) and polysulfone (PSf) are blended together as polymer, N,N-Dimethylacetamide (DMAc) as solvent and Polyvinylpyrrolidone as an additive in membrane fabrication. Best formula for blended polymer was tested on the performance test; salt rejection, flux of salt and Field Emission Scanning Electron Microscopic (FESEM).

Cellulose acetate-based membrane for wastewater treatment—A state-of-the-art review

“…188 Although neat CA and modified CA membranes are common polymers employed for the fabrication of porous polymeric membranes, they possess several disadvantages such as lower mechanical and thermal stability and lower susceptibility to chemical and microbial attack. 195 To solve these issues, researchers have been trying to introduce new CA membranes blended with other miscible polymers (polyvinylchloride, polysulfone, polyurethane, and polyethylene oxide) 103,199,200 or the addition of nanofillers such as hydroxyapatite, layered clays, andlayered double hydroxides (LDHs) 201,202 shown in Table 6. Laura et al fabricated a cellulose acetate-based membrane modified with block co-polymer poly(4-vinylpyridine-b-ethylene oxide) (P4VP-b-PEO) for the adsorption of several electrondeficient EDPs.…”

Thermal Annealing Effect on Morphology and Performance of Polysulfone-Cellulose Acetate Membranes: Application for Water Defluoridation

“…33 The first is the addition of hydrophilic or organic materials, such as polyvinylpyrrolidone (PVP) 34 or with certain minerals, such as zirconium dioxide (ZrO2), 35 the second corresponds to a coating with hydrophilic polymers, 36 and the third class describes grafting with hydrophilic polymers or monomers. [37][38][39] Abdullah et al 23 studied mixtures of cellulose acetate (CA) and polysulfone (PSf) dissolved in N,Ndimethylacetamide (DMAc) as a solvent and polyvinylpyrrolidone (PVP) as an additive. The highest flow rate was observed for the mixture CA/PSf: 75/25 of 9.93 L/m 2 h, while the lowest flux was recorded for the membrane CA/PSf: 100/0, of 7.16 L/m 2 h. The rejection of the salt (NaCl) also increased with the decrease of the CA composition in the mixed polymer.…”

“…The best performance was obtained for the following formula: 25% PSf 7.5% PVP and 75% CA. 37 M. Sivakumar et al 40 noted that the increase in the polysulfone content in CA-PSf mixtures resulted in an increase in the flow of pure water and in the water content. The rejection of the BSA was higher, compared to a smaller flow.…”

Preparation and Characterization of Polysulfone Composite Membrane Blended with Kenaf Cellulose Fibrils

“…The chemical method, using strong acid hydrolysis, produces sizecontrolled fibrils with fractional removal of the amorphous sections of raw materials such as wood fibers and agricultural waste [7]. Whereas, the mechanical method includes a grinder process, a highpressure homogenizer and refiner treatment [11]. Cellulose fibrils extracted from cellulose pulp have much larger specific surface area, low density and higher stiffness compared with the inorganic particles [8].…”