Improving the antifouling property of polysulfone ultrafiltration membrane by incorporation of isocyanate-treated graphene oxide

Zhao, Haiyang; Wu, Li–guang; Zhou, Zhijun; Zhang, Lin; Chen, Huan-Lin

doi:10.1039/c3cp50955a

Cited by 208 publications

(115 citation statements)

References 55 publications

Supporting

Mentioning

108

Contrasting

Unclassified

Order By: Relevance

“…The results reveal the broad asperities on pure PSf surface, with mean roughness R a = 14 nm, root mean square ridge elevations R ms = 17.56 nm, and maximum ridge elevation R max = 30.45 nm (Table 2). Meanwhile, addition of GO resulted in sharper and denser asperities on PSf/GO supports than that of pure PSf [32,33]. Nonetheless, based on R a , R ms and R max values, the roughness properties of PSf/GO declined as GO loading were increased to 0.25 wt% and then increased again at ≥ 0.5 wt% loadings.…”

Section: Effect Of Go Loading On the Structure Of Psf/go Supportsmentioning

confidence: 65%

“…These unique dimensional and surface properties of GO nanosheets offer great potential for making composite materials with unique structural properties, high chemical stability, strong hydrophilicity, and excellent antifouling properties [27][28][29][30][31]. Recent studies have used GO or modified GO as fillers for the fabrication of ultrafiltration composite membranes with improved hydrophilic and antifouling properties for wastewater treatment [29,[32][33][34]. To the best of our knowledge, the potential of GO nanosheets as fillers to modify the structure and surface properties of the TFC-FO support layer which subsequently reduce the S value has never been explored earlier.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Graphene oxide incorporated polysulfone substrate for the fabrication of flat-sheet thin-film composite forward osmosis membranes

Park

Phuntsho

et al. 2015

Journal of Membrane Science

239

104

View full text Add to dashboard Cite

Graphene oxide incorporated polysulfone substrate for the fabrication of flat-sheet thin-film composite forward osmosis membranes, Journal of Membrane Science, http://dx.Abstract 2The preparation and performances of the newly synthesized thin film composite (TFC) forward osmosis (FO) membranes with graphene oxide (GO)-modified support layer are presented in this study. GO nanosheets were incorporated in the polysulfone (PSf) to obtain PSf/GO composite membrane support layer. Polyamide (PA) active layer was subsequently formed on the PSf/GO by interfacial polymerization to obtain the TFC-FO membranes.Results reveal that at an optimal amount of GO addition (0.25 wt%), a PSf/GO composite support layer with favorable structural property measured in terms of thickness, porosity and pore size can be achieved. The optimum incorporation of GO in the PSF support layer not only significantly improved water permeability but also allowed effective PA layer formation, in comparison to that of pure PSf support layer which had much lower water permeability.Thus, a TFC-FO membrane with high water flux (19.77 Lm -2 h -1 against 6.08 Lm -2 h -1 for pure PSf) and reverse flux selectivity (5.75 Lg -1 against 3.36 Lg -1 for pure PSf) was obtained under the active layer facing the feed solution or AL-FS membrane orientation. Besides the improved structural properties (reduced structural parameter, S) of the support layer, enhanced support hydrophilicity also contributed to the improved water permeability of the membrane. Beyond a certain point of GO addition (≥0.5 wt%), the poor dispersion of GO in dope solution and significant structure change resulted in lower water permeation and weaker mechanical properties in support as well as FO flux/selectivity of consequent TFC membrane.Overall, this study suggests that GO modification of membrane supports could be a promising technique to improve the performances of TFC-FO membranes.

show abstract

Section: Effect Of Go Loading On the Structure Of Psf/go Supportsmentioning

confidence: 65%

Section: Introductionmentioning

confidence: 99%

Graphene oxide incorporated polysulfone substrate for the fabrication of flat-sheet thin-film composite forward osmosis membranes

Park

Phuntsho

et al. 2015

Journal of Membrane Science

239

104

View full text Add to dashboard Cite

show abstract

“…These disadvantages may be overcome by intercalating well-dispersed graphene nanosheets across a polymeric matrix to promote water transport and improve membrane performance [25][26][27][28][29][30]. Such an approach was demonstrated for a number of membrane structures, including porous ultrafiltration membranes [30,31], semi-permeable nano-filtration [25,26,32], pervaporation [32] and gas separation [33] applications. These new membranes exhibited improved pore structure, increased hydrophilicity and higher water permeation, opening the route to the design of advanced graphene reinforced membranes for pressure driven separation [2].…”

Section: Introductionmentioning

confidence: 96%

Promoted water transport across graphene oxide–poly(amide) thin film composite membranes and their antibacterial activity

et al. 2015

View full text Add to dashboard Cite

“…GO nanosheets are known to improve the anti-fouling property for the mixed matrix filtration membranes [18,[20][21][22][23]. This is ascribed to the improved membrane's hydrophilicity due to the …”

Section: Anti-fouling Performancementioning

confidence: 99%

Suppressing Salt Transport through Composite Pervaporation Membranes for Brine Desalination

Lei

Hou

et al. 2017

Applied Sciences

View full text Add to dashboard Cite

Featured Application: The pervaporation membranes fabricated in this study can be potentially used for brine treatment.Abstract: Pervaporation membranes have gained renewed interest in challenging feedwaters desalination, such as reverse osmosis (RO) concentrated brine wastewater. In this study, composite polyvinyl alcohol (PVA)/polyvinylidene fluoride (PVDF) pervaporation membranes were prepared for brine treatment. The composite membrane was firstly studied by adjusting the cross-linking density of PVA by glutaraldehyde: the membrane with higher cross-linking density exhibited much higher salt rejection efficiency for long-term operation. A trace of salt on the permeate side was found to diffuse through the membrane in the form of hydrated ions, following solution-diffusion mechanism. To further suppress the salt transport and achieve long-term stable operation, graphene oxide (GO) was incorporated into the PVA layer: the addition of GO had minor effects on water permeation but significantly suppressed the salt passage, compared to the pure PVA/PVDF membranes. In terms of brine wastewater containing organic/inorganic foulant, improved anti-fouling performance was also observed with GO-containing membranes. Furthermore, the highest flux of 28 L/m 2 h was obtained for the membrane with 0.1 wt. % of GO using 100 g/L NaCl as the feed at 65 • C by optimising the pervaporation rig, with permeate conductivity below 1.2 µS/cm over 24 h (equivalent to a salt rejection of >99.99%).

show abstract

Improving the antifouling property of polysulfone ultrafiltration membrane by incorporation of isocyanate-treated graphene oxide

Cited by 208 publications

References 55 publications

Graphene oxide incorporated polysulfone substrate for the fabrication of flat-sheet thin-film composite forward osmosis membranes

Graphene oxide incorporated polysulfone substrate for the fabrication of flat-sheet thin-film composite forward osmosis membranes

Promoted water transport across graphene oxide–poly(amide) thin film composite membranes and their antibacterial activity

Suppressing Salt Transport through Composite Pervaporation Membranes for Brine Desalination

Contact Info

Product

Resources

About