Preparation and characterization of PES–SiO2 organic–inorganic composite ultrafiltration membrane for raw water pretreatment

Shen, Jiangnan; Ruan, Hao; Wu, Li–guang; Gao, Congjie

doi:10.1016/j.cej.2011.02.039

Cited by 278 publications

(107 citation statements)

References 27 publications

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“…The nanocarbon is constituted of SiO2, which has been known to enhance the hydrophilic nature of a membrane. As reported by Shen et al, [22], the addition of silica oxide improves the hydrophilicity of the membrane. The decrease in the contact angle for the PES3 and PES4 membranes found in this study is mostly due to the presence of silica originating from the nanocarbon additive.…”

Section: Membrane Hydrophilicitymentioning

confidence: 53%

Fabrication of Polyethersulfone Membranes Using Nanocarbon as Additive

Arahman¹

2018

GEOMATE

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Membrane-based processes have become the most dominant technology for water or wastewater treatment. To maintain optimum performance, a membrane should have high permeability and selectivity, good hydrophilicity, in combination with stable mechanical properties. Generally, the membrane produced from pure polyethersulfone (PES) has good mechanical properties, but low hydrophilicity. Modifications of the PES membrane with hydrophilic additives can increase its hydrophilicity. Nevertheless, incorporating additives may decrease its mechanical properties. The objective of this study is to enhance the overall properties of PES membrane by incorporating nanocarbon as an additive. The goal is to obtain a membrane with high permeability and selectivity, good hydrophilicity, as well as superior mechanical properties. Four PES membranes were equipped via the dry-wet inversion method using two solvents (n-methyl-2-pyrrolidone (NMP) and dimethyl sulfoxide (DMSO)). The nanocarbon additive was fabricated from palm fruit-shell biomass wastes. The results show that the type of solvent affects the pore structure of the membrane surface. The membranes prepared using the PES-NMP system have dense structures with small nodules that appear in the upper skin layer, while the membranes from the PES-DMSO system have a spherulite-like structure. The membrane structures changed significantly when the nanocarbon particles were added to the polymer solution, particularly in terms of the shape and size of the microvoids. The finger-like structure found in the membranes prepared from PES-NMP or PES-DMSO systems disappears after the nanocarbon was added to the system. Furthermore, the accretion of nanocarbon to the polymer system increases the water permeability, hydrophilicity, and mechanical properties of the resulted membrane.

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Section: Membrane Hydrophilicitymentioning

confidence: 53%

Fabrication of Polyethersulfone Membranes Using Nanocarbon as Additive

Arahman¹

2018

GEOMATE

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“…Many types of inorganic llers have been proposed as polymeric membrane nanollers. In the rst place, TiO 2 7-11 is undoubtedly the preferred material for this goal, but also silica (SiO 2 ), 12,13 carbon nanotubes, 14 zeolites, 15,16 alumina (Al 2 O 3 ), 17 silver (Ag), 18 zirconia (ZrO 2 ), 19 zinc oxide (ZnO) 20 and zerovalent iron (FeO) 21 are of potential interest in this eld.…”

Section: 3mentioning

confidence: 99%

Binary metal oxides for composite ultrafiltration membranes

et al. 2014

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A new ultrafiltration membrane was developed by the incorporation of binary metal oxides of the type Ti (x) Zr (1Àx) O 2 inside polyethersulfone. Physico-chemical characterization of the binary metal oxides demonstrated that the presence of Ti in the TiO 2 -ZrO 2 system results in an increase of the size of the oxides, and also their dispersity. The crystalline phases of the synthesized binary metal oxides were identified as srilankite and zirconium titanium oxide. The effect of the addition of ZrO 2 can be expressed in terms of the inhibition of crystal growth of nanocrystalline TiO 2 during the synthesis process. For photocatalytic applications the band gap of the synthesized semiconductors was determined, confirming a gradual increase (blue shift) in the band gap as the amount of Zr loading increases. Distinct distributions of binary metal oxides were found along the permeation axis for the synthesized membranes. Particles with Ti are more uniformly dispersed throughout the membrane cross-section.The physico-chemical characterization of membranes showed a strong correlation between some key membrane properties and the spatial particle distribution in the membrane structure. The proximity of metal oxide fillers to the membrane surface determines the hydrophilicity and porosity of modified membranes. Membranes incorporating binary metal oxides were found to be promising candidates for wastewater treatment by ultrafiltration, considering the observed improvement in flux and anti-fouling properties of doped membranes. Multi-run fouling tests of doped membranes confirmed the stability of permeation through membranes embedded with binary TiO 2 -ZrO 2 particles.

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“…17,18 Other than that, hydrophobic membrane could also be altered using nanoparticles (NPs) including TiO 2 , SiO 2 , Al 2 O 3 and others to form hydrophilic membrane. 19 Membrane hydrophilicity enhancement after addition of TiO 2 nanoparticles have resulted in water flux improvement. 20 Furthermore, when 1%-2% of TiO 2 is incorporated with the pure membrane, the membrane porosity is increased, while when the ratio is increased to 3%, the agglomeration of NPs occurred.…”

Section: Introductionmentioning

confidence: 99%