Tailoring the surface properties of PES ultrafiltration membranes to reduce the fouling resistance using synthesized hydrophilic copolymer

Peyravi, Majid; Rahimpour, Ahmad; Jahanshahi, Mohsen; Javadi, Ali; Shockravi, Abbas

doi:10.1016/j.micromeso.2012.04.036

Cited by 131 publications

(57 citation statements)

References 28 publications

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“…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: 85%

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

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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.

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Section: Afm Analysissupporting

confidence: 85%

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

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“…Active layer roughness is directly linked to the fouling trend of the membranes as it was already reported (Peyravi et al, 2012;Puro et al, 2010;Ryan and Poduska, 2008;Weis et al, 2003). The observed steep increase in the roughness and fractal dimension of the HFK-328 membrane aged with HNO 3 would cause high fouling rates.…”

Section: Effects Of the Acidic And Alkaline Ageing Conditions On Membmentioning

confidence: 57%

Ageing of polyethersulfone ultrafiltration membranes under long-term exposures to alkaline and acidic cleaning solutions

Antón

Alvarez

Palacio

et al. 2015

Chemical Engineering Science

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“…In the FTIR spectrum of PES, the sharp peak at 1144 cm -1 belongs to the symmetric stretching of -SO 2 - [32], and the two peaks at 1576 and 1483 cm -1 both correspond to the typical aromatic benzene ring [33]. Peaks at 1234, and 1010 cm -1 can be described to the asymmetric stretch, and symmetric stretch of aromatic ether linkages [34].…”

Section: Ftir Analysismentioning

confidence: 97%

Miscibility analysis of polyethersulfone and polytetrafluoroethylene using the molecular dynamics method

2015

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Investigation of the miscibility between polyethersulfone (PES) and polytetrafluoroethylene (PTFE) will be helpful in the preparation of functional polymers. The miscibility between PES and PTFE in different proportions was studied using molecular dynamics (MD) simulations, Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). PES and PTFE are partly miscible as the weight fraction of PES is less than 30 wt%. The interaction between PES and PTFE polymers cannot be chemical bonding, and the non-bond interaction between them will play an important role in the blending. The hydrogen bond interaction can be ignored due to its low contribution to the non-bonded energies. Compared with hydrogen bond and electrostatic interactions, Van der Waals (vdW) shows a large influence on the non-bond interaction of pure PTFE; but its contribution in PES/PTFE blends decreases with the increasing addition of PES. The presence of PTFE suppresses the mobility of PES chains; nevertheless, the mobility of PTFE chains is unremarkably influenced by PES.

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Tailoring the surface properties of PES ultrafiltration membranes to reduce the fouling resistance using synthesized hydrophilic copolymer

Cited by 131 publications

References 28 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

Ageing of polyethersulfone ultrafiltration membranes under long-term exposures to alkaline and acidic cleaning solutions

Miscibility analysis of polyethersulfone and polytetrafluoroethylene using the molecular dynamics method

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