Preparation and characterization of polysulfone/β-cyclodextrin polyurethane composite nanofiltration membranes

Adams, Feyisayo Victoria; Nxumalo, Edward N.; Krause, Rui W. M.; Hoek, Eric M.V.; Mamba, Bhekie B.

doi:10.1016/j.memsci.2012.03.023

Cited by 107 publications

(34 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore at 10 wt% PVP, the Ra values decreased again, which meant that the membrane surface was becoming less rough again. Some reasons for this could be the following: (i) increase in permeability of the membrane with PVP addition (Adams et al, 2012) and (ii) the change in roughness is in proportion to the membrane pore size as already discussed in the SEM section and follows from the discussion of this by other workers (Peyravi et al, 2012). Thus the AFM results obtained in this present study confirm the link between membrane porosity and the surface roughness.…”

Section: Afm Analysissupporting

confidence: 83%

Synthesis of robust flexible polyethersulfone ultrafiltration membranes supported on non-woven fabrics for separation of NOM from water

Tshabalala¹,

Nxumalo²,

Mamba³

et al. 2016

WSA

Self Cite

View full text Add to dashboard Cite

This work describes the synthesis of structurally robust ultrafiltration (UF) polyethersulfone (PES) membranes supported on three different types of non-woven fabrics (NWFs) prepared using a simple phase inversion method. The NWF supported membranes exhibited high mechanical strength compared to the unsupported PES membranes modified with polyvinyl pyrrolidone (PVP) due to the strength provided by the NWFs. The tensile strength of the supported PVP modified membranes was ~7 MPa compared to ~2 MPa observed for the PVP modified unsupported UF membranes. The use of the NWFs clearly provides robustness to the modified membranes. The membrane surfaces became hydrophilic with addition of PVP and the pore sizes increased with an increase in PVP concentration (scanning electron microscopy (SEM) results). The rejection of humic acid (as a model NOM compound) was 98% for PES on NWF1, while PES membranes supported on NWF2 and NWF3 gave rejections of 94% and 96%, respectively; all with good fouling resistance. This work demonstrates that the use of a NWF support allows for the modification of the surface of the membranes without compromising the overall strength of the membranes, but more importantly the ability of the membranes to reject HA while exhibiting high resistance to fouling.

show abstract

Section: Afm Analysissupporting

confidence: 83%

Synthesis of robust flexible polyethersulfone ultrafiltration membranes supported on non-woven fabrics for separation of NOM from water

Tshabalala¹,

Nxumalo²,

Mamba³

et al. 2016

WSA

Self Cite

View full text Add to dashboard Cite

show abstract

“…On the other hand, the membranes made of hydrophilic polymers such as poly(vinyl alcohol) (PVA), cellulose acetate (CAc), and polyacrylonitrile (PAN) are also applied for the fabrication of liquid separation membranes; however, the thermal and mechanical resistance and chemical stability of these membrane are low. Composite polysulfone (PSf) membranes were synthesized by Adams, Nxumalo, Krause, Hoek, and Mamba (2012) by blending PSf with different concentrations of b-CPU (0e10%) using a phase inversion technique. The main focus in blending polymers is to increase hydrophilicity and decrease membrane fouling.…”

Section: Composite Membranes Prepared Via Blending Of Polymersmentioning

confidence: 99%

Advances in polymeric membranes for water treatment

Madaeni

Ghaemi

Rajabi

2015

Advances in Membrane Technologies for Water Treatment

View full text Add to dashboard Cite

“…The band present at 2,921 cm −1 corresponds to -CH stretching absorption while the peak at 2,856 cm −1 is ascribed to aliphatic -CH 2 asymmetric stretching. The -CH vibration and stretching are attributed to the polymer phase of the membranes [24].…”

Section: Fourier Transform Infra-red Of Clays and Membranesmentioning

confidence: 99%

Synthesis and characterization of polysulphone/clay membrane: effect of natural clay differences

Adams

Mulaba‐Bafubiandi

2015

Desalination and Water Treatment

Self Cite

View full text Add to dashboard Cite

A B S T R A C TPolysulphone/clay ion-exchange membranes were prepared by the phase inversion method using N-methyl-2 pyrrolidone as solvent. The aims of this work were to synthesize and investigate the effect of different natural clays from different locations on the morphology, hydrophilicity, structure, swellability, metal extraction from water and ion-exchange capacity (IEC) of the membranes prepared. The characterization techniques used were scanning electron microscopy, X-ray diffractometry, Fourier transform infra-red spectroscopy and contact angle. The clays from locations 1 (N4) and 2 (N6) had a good dispersion in the polysulphone matrix and exhibited high IEC, swellability and hydrophilicity. The 2θ of the polysulphone/clay membranes compared to polysulphone membrane was lower, indicating an increase in the d-spacing between layers of the clays and also intercalation of clay layer silicates in the polymer matrix. Extraction/adsorption of Pb 2+ by all the tested membranes was faster (10 min) compared to Cu 2+ , and it was approximately 100%.

show abstract

Preparation and characterization of polysulfone/β-cyclodextrin polyurethane composite nanofiltration membranes

Cited by 107 publications

References 32 publications

Synthesis of robust flexible polyethersulfone ultrafiltration membranes supported on non-woven fabrics for separation of NOM from water

Synthesis of robust flexible polyethersulfone ultrafiltration membranes supported on non-woven fabrics for separation of NOM from water

Advances in polymeric membranes for water treatment

Synthesis and characterization of polysulphone/clay membrane: effect of natural clay differences

Contact Info

Product

Resources

About