Effects of Phase Separation Behavior on Morphology and Performance of Polycarbonate Membranes

Idris, Ahmad Kamal; Man, Zakaria; Maulud, Abdulhalim Shah; Khan, Muhammad Saad

doi:10.3390/membranes7020021

Cited by 71 publications

(57 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In previous study of fabrication PSf by Idris et al reveals the similar morphological structures [8].…”

Section: Surface Morphologies Of Polysulfone Membranementioning

confidence: 73%

Effect of Different Solvent on Asymmetric Polysulfone (Psf) Membranes for Co2/Ch4 Separation

Rozuki¹,

Tajuddin²

2018

Environ. ecosyst. sci.

View full text Add to dashboard Cite

The asymmetric membranes solution were developed for CO2/CH4 separation by mixing polysulfone (PSf) with N-Methyl-2-pyrrolidone (NMP). A volatile solvent, Tetrahydrofuran (THF) was introduced into the casting solution by various loading (0 to 75%) to form a high gas separation performance of asymmetric membranes via dry/wet phase inversion method. The produced membranes were characterized using Scanning Electron Microscopic (SEM), Fourier Transform Infrared Spectroscopy (FTIR) and gas permeability test. SEM images of a membrane with NMP as a solvent has the thickest dense layer while a membrane with THF as a solvent has the thinnest thickness of the membrane. FTIR results indicating the present of sulfur dioxide (SO2) and methyl (CH3) group at wavelength 1170 cm-1 and 2969 cm-1 respectively verifying the use of PSf as a polymer. As for gas permeation test, the used of THF as a solvent shows the highest CO2/CH4 selectivity with the lowest permeability.

show abstract

“…In previous study of fabrication PSf by Idris et al reveals the similar morphological structures [8].…”

Section: Surface Morphologies Of Polysulfone Membranementioning

confidence: 73%

Effect of Different Solvent on Asymmetric Polysulfone (Psf) Membranes for Co2/Ch4 Separation

Rozuki¹,

Tajuddin²

2018

Environ. ecosyst. sci.

View full text Add to dashboard Cite

show abstract

“…Cloud point titrations have frequently been used to determine the miscibility gap of ternary polymeric systems . It has previously been shown that the location of a system's heterogeneous region is dependent on the combination of polymer, solvent, and nonsolvent .…”

Section: Resultsmentioning

confidence: 99%

“…During NIPS a homogenous PES solution is immersed into a nonsolvent bath . The diffusive exchange between the solvent from the polymer film and the nonsolvent from the precipitation bath changes the composition within the polymer film, till phase separation occurs . Until solidification sets in different structure forming mechanisms occur, which result in different morphologies .…”

Section: Introductionmentioning

confidence: 99%

Influences of different preparation variables on polymeric membrane formation via nonsolvent induced phase separation

Kahrs

Gühlstorf

Schwellenbach

2019

J of Applied Polymer Sci

View full text Add to dashboard Cite

This work presents a comparative study on the formation of polyethersulfone ultrafiltration membranes via nonsolventinduced phase separation (NIPS) in two different solvent systems. N-methyl-2-pyrrolidone was chosen as conventional solvent and 2-pyrrolidone as a greener alternative. The overall objective was to obtain a mechanistic clarification of the membrane formation process in dependence of the most important controlling parameters. By performing different series of experiments, it was possible to determine the differences between the two solvents regarding the effects of variations in nonsolvent additives, polymer concentration, and precipitation conditions. It was found that a raising concentration of several nonsolvents, the increase of the polymer concentration and changes in the precipitation conditions can suppress the formation of macrovoids, regardless of the applied solvent. In contrast, differences were observed with regard to the performance of the membrane prototypes. This study improves the understanding of membrane formation via NIPS and identifies the effects of different variables. It shows that the choice of the solvent is essential for the dominating formation mechanisms and therefore for the resulting membrane features. It also proves that green solvents can substitute hazardous solvents if the influencing variables are well-understood in order to control them for obtaining desired membrane properties.

show abstract

“…Polyamic acid and modified Polyamic acid films were subjected to Scanning Electron Microscopy for morphological determinations and for identification of the nature and distribution of metallic particles within them (Figures 6 and 7). Figure 6 shows the surface of wet phase inverted Au/Ag-PAA, with a spongelike morphology typically observed in asymmetric, phase inverted membranes described in literature [40,41]. Gold and Silver nanoparticles are well dispersed on the film with an average size of 35 nm for spherical gold nanoparticles and 25 nm for Silver nanoparticles.…”

Section: Surface Morphologymentioning

confidence: 76%

Fabrication of Nanostructured Polyamic Acid Membranes for Antimicrobially Enhanced Water Purification

Kimotho

Noah

Nawiri

et al. 2020

Advances in Polymer Technology

View full text Add to dashboard Cite

Water scarcity and quality challenges facing the world can be alleviated by Point-of-Use filtration devices (POU). e use of filtration membranes in POU devices has been limited largely because of membrane fouling, which occurs when suspended solids, microbes, and organic materials are deposited on the surface of filtration membranes significantly decreasing the membrane lifespan, thereby increasing operation costs. ere is need therefore to develop filtration membranes that are devoid of these challenges. In this work, nanotechnology was used to fabricate nanostructured polyamic acid (nPAA) membranes, which can be used for microbial decontamination of water. e PAA was used as support and reducing agent to introduce silver nanoparticles (AgNPs) and gold nanoparticles (AuNPs) with antimicrobial properties. e nPAA membranes were fabricated via thermal and wet phase inversion technique and then tested against Escherichia coli and Staphylococcus aureus following standard tests. e resulting nanoparticles exhibited excellent dispersibility and stability as indicated by the color change of the solution and increments of optical density at 415 nm for AgNPs and 520 nm for AuNPs. e wet phase inversion process used produced highly porous, strong, and flexible nPAA membranes, which showed well-dispersed spherical AuNPs and AgNPs whose rough average size was found to be 35 nm and 25 nm, respectively. e AgNPs demonstrated inhibition for both gram positive E. coli and gram negative S. aureus, with a better inhibitory activity against S. aureus. A synergistic enhancement of AgNPs antimicrobial activity upon AuNPs addition was demonstrated. e nPAA membranes can thus be used to remove microbials from water and can hence be used in water purification.

show abstract

Effects of Phase Separation Behavior on Morphology and Performance of Polycarbonate Membranes

Cited by 71 publications

References 34 publications

Effect of Different Solvent on Asymmetric Polysulfone (Psf) Membranes for Co2/Ch4 Separation

Effect of Different Solvent on Asymmetric Polysulfone (Psf) Membranes for Co2/Ch4 Separation

Influences of different preparation variables on polymeric membrane formation via nonsolvent induced phase separation

Fabrication of Nanostructured Polyamic Acid Membranes for Antimicrobially Enhanced Water Purification

Contact Info

Product

Resources

About