Fouling resistant PVDF/Carboxymethyl chitosan composite nanofiltration membranes for humic acid removal

Ekambaram, Kavitha; Doraisamy, Mohan

doi:10.1016/j.carbpol.2017.06.017

Cited by 38 publications

(7 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, for 30 min and 60 min modification time, the membrane contact angles first decreased and then increased to above 40.0°at 10 g/L CS concentration, which is still lower than the PES/PDA membrane contact angle. This phenomenon was also observed by several researchers using CS, and can be attributed to the agglomeration and clogging of pores at higher concentrations of this macromolecular substance, because 10 g/L CS solution is gelatinous and sticky (Ekambaram and Doraisamy, 2017;Wang et al, 2010a). Overall, the modification by PDA and CS increased the hydrophilicity of unmodified PES membrane, and the contact angle of PES/PDA/CS (10 min, 5 g/L) membrane was 36.7 ± 1.0°, which is more hydrophilic than unmodified PES membrane.…”

Section: Initial Investigation and Optimization Of Pes/pda/cs Membransupporting

confidence: 70%

Increased E. coli bio-adsorption resistance of microfiltration membranes, using a bio-inspired approach

Liu

Campos

et al. 2021

Science of The Total Environment

View full text Add to dashboard Cite

show abstract

Section: Initial Investigation and Optimization Of Pes/pda/cs Membransupporting

confidence: 70%

Increased E. coli bio-adsorption resistance of microfiltration membranes, using a bio-inspired approach

Liu

Campos

et al. 2021

Science of The Total Environment

View full text Add to dashboard Cite

show abstract

“…The presence of this peak confirmed the deposition of the CS coating layer. In addition, the broad peak at approximately 3400 cm –1 was ascribed to the N–H and O–H stretching vibrations of CS molecules . The elemental compositions of the CS coating layers were characterized with XPS.…”

Section: Resultsmentioning

confidence: 99%

pH-Responsive Chitosan Sacrificial Layer for Simultaneous Enhancement of Ultrafiltration Performance and Sustainable Membrane Fouling Control

Zhou

Zhao

et al. 2023

ACS Appl. Polym. Mater.

View full text Add to dashboard Cite

Membrane fouling is inevitable during ultrafiltration of natural surface waters. High-performance ultrafiltration membranes with sustainable antifouling abilities and regenerable properties are of great importance for water treatment. In this study, pH-responsive chitosan was used as a sacrificial and protective layer to enhance the ultrafiltration performance with a coating−decoating−recoating strategy. The resultant membranes were systematically characterized to determine the surface morphologies, separation, and antifouling capabilities. The results showed that the modified membranes exhibited enhanced hydrophilicity, reduced pore sizes, enhanced separation efficiencies, and improved antifouling behaviors at the expense of 3.4−18.8% reductions in the water fluxes. The atop chitosan layer served as the sacrificial layer for foulant deposition and protected the underlying support from fouling. Consequently, the fouled chitosan layer could be completely removed and regenerated by dissolution in an acid solution and recoated at the same time. During ultrafiltration of natural surface water, the flux recovery rate of the optimized membrane reached 95%, which was much higher than that of the control membrane (60.3%). The modified membranes exhibited excellent separation and antifouling capabilities in purifying real surface waters. Thus, the coating−decoating−recoating strategy is an economical and environmentally sound method for sustainable surface modifications of ultrafiltration membranes used to produce high-quality drinking water.

show abstract

“…The PVDF disc's Cu-O impregnation demonstrated hydrophilicity and improved separation performance tested by the method are as shown in eq (3). The separation efficiency increased throughout the duration of the 0.6 gm of nanoparticles adding, and over 95% of the oil was rejected, allowing water to flow onto the APD alternatively.…”

Section: Fig 7 Flux Of Water Through Apdmentioning

confidence: 93%

“…Therefore, an alternative method/material, which is economical, efficient method and material has desirable, and has a high recyclability ratable. Membrane technology offers the aforesaid benefits and has been widely used [3,4]. Different polymers find application in this area and were successfully used with pores in the ultra, micro, and nano dimension including polyether-sulfone (PES) [5], poly (vinylidene fluoride) (PVDF), cellulose acetate (CA) and polyacrylonitrile (PAN) to break the emulsified matrix and offer effective demulsification [6].…”

Section: Introductionmentioning

confidence: 99%

The synthesis and characterization of demulsifying poly vinylidene Fluoride (PVDF) Disc

Ullah,

Sahir,

Bahader

et al. 2023

IOP Conf. Ser.: Mater. Sci. Eng.

View full text Add to dashboard Cite

Oil/water separation is still a challenging universal task. Here we fabricated an amphiphilic polymeric (APD) PVDF disc that can be used to separate free oil/water mixtures and recover the pure water from W/O emulsions. The modification of the disc includes deposition of copper oxide (CuO) was integrated on the surface via the impregnation method; the CTAB was used as a porogen to increase the roughness of the surface, Morphology of the disc was investigated by SEM and the result showed the nanoparticles were entrapped on the surface and inside the disc. FTIR results strongly predicted the correlation of CTAB, PVDF, and CuO nanoparticles of the modified disc. Separation and wettability test of the FRR% (Flux recovery ratio), permeate flux/oil rejection coefficient (R %) and the water-uptake test confirmed the antifouling properties, permeability of water, oil-rejection, and porosity of the disc. The purpose of impregnation CuO enhanced the hydrophilicity and anti-fouling properties of the PVDF disc.

show abstract

Fouling resistant PVDF/Carboxymethyl chitosan composite nanofiltration membranes for humic acid removal

Cited by 38 publications

References 28 publications

Increased E. coli bio-adsorption resistance of microfiltration membranes, using a bio-inspired approach

Increased E. coli bio-adsorption resistance of microfiltration membranes, using a bio-inspired approach

pH-Responsive Chitosan Sacrificial Layer for Simultaneous Enhancement of Ultrafiltration Performance and Sustainable Membrane Fouling Control

The synthesis and characterization of demulsifying poly vinylidene Fluoride (PVDF) Disc

Contact Info

Product

Resources

About