surface fluorination of polyamide nanofiltration membrane

  • surface fluorination of polyamide nanofiltration membrane

    Surface fluorination of polyamide nanofiltration membrane

    A new kind of fluorinated polyamine was successfully synthesized and grafted onto the polyamide membrane surface to fabricate an antifouling nanofiltration membrane with low surface free energy. The surface composition of the fluorinated polyamide nanofiltration membrane was confirmed by Fourier transform infrared spectroscopy (FT-IR) and X-ray

  • surface fluorination of polyamide nanofiltration membrane

    Surface fluorination of polyamide nanofiltration membrane

    The presence of perfluoroalkyl groups on the membrane surface significantly lowered the surface free energy from 60.0 to 44.4 mJ/m 2. The filtration experiment results indicated that the surface fluorination did not lower the separation performance of the polyamide nanofiltration membrane significantly.

  • surface fluorination of polyamide nanofiltration membrane

    Surface fluorination of polyamide nanofiltration membrane

    A new kind of fluorinated polyamine was successfully synthesized and grafted onto the polyamide membrane surface to fabricate an antifouling nanofiltration membrane with low surface free energy.

  • improved antifouling properties of polyamide nanofiltration

    Improved Antifouling Properties of Polyamide Nanofiltration

    Carboxyls are inherent functional groups of thin-film composite polyamide nanofiltration (NF) membranes, which may play a role in membrane performance and fouling. Their surface presence is attributed to incomplete reaction of acyl chloride monomers during the membrane active layer synthesis by interfacial polymerization. In order to unravel the effect of carboxyl group density on organic

  • polyamide nanofiltration membrane with highly uniform sub

    Polyamide nanofiltration membrane with highly uniform sub

    Nanofiltration (NF) based on thin-film-composite polyamide (TFC-PA) membranes is a mature and energy-efficient technology for separating small solutes from liquid solvents 12,13,14. The selective

  • surface modification of polyamide nanofiltration membrane

    Surface modification of polyamide nanofiltration membrane

    A simple two‐step surface modification method of polyamide nanofiltration membrane, involving the activation of amide groups by formaldehyde and the subsequent cerium [Ce (IV)]‐induced graft polymerization of zwitterionic 3‐(methacryloylamino) propyl‐dimethyl‐(3‐sulfopropyl) ammonium hydroxide) (MPDSAH) monomers, was employed to improve membrane antifouling property.

  • degradation of polyamide nanofiltration and reverse osmosis

    Degradation of Polyamide Nanofiltration and Reverse Osmosis

    The degradation of polyamide (PA) nanofiltration and reverse osmosis membranes by chlorine needs to be understood in order to develop chlorine-resistant membranes. Coated and uncoated fully aromatic (FA) and piperazine (PIP) semi-aromatic PA membranes were treated with hypochlorite solution and analyzed by X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared (FTIR). XPS

  • preparation polyamide nanofiltration membrane by interfacial

    Preparation polyamide nanofiltration membrane by interfacial

    (2012). Preparation polyamide nanofiltration membrane by interfacial polymerization. Desalination and Water Treatment: Vol. 37, No. 1-3, pp. 238-243.

  • nanofiltration thin‐film composite membrane on either the

    Nanofiltration thin‐film composite membrane on either the

    While both surfaces have pores common of microfiltration membranes, the inner surface has a larger pore diameter than the outer surface (2,700 nm compared to 950 nm). The inner TFC membrane showed higher water nanofiltration permeance than the outer (2.20 ± 0.17 compared to 0.13 ± 0.03 L m −2 hr −1 bar −1). This was due to the influence

  • nanofiltration

    Nanofiltration

    Nanofiltration (NF) is a relatively recent membrane filtration process used most often with low total dissolved solids water such as surface water and fresh groundwater, with the purpose of softening (polyvalent cation removal) and removal of disinfection by-product precursors such as natural organic matter and synthetic organic matter.

  • desalination by membrane distillation using electrospun

    Desalination by Membrane Distillation using Electrospun

    A set of iCVD-treated electrospun PA6(3)T fiber membranes with fiber diameters ranging from 0.25 to 1.8 μm were tested for desalination using the air gap membrane distillation configuration. Permeate fluxes of 2–11 kg/m²/h were observed for temperature differentials of 20–45 °C between the feed stream and condenser plate, with rejections

  • polymers for membrane filtration in water purification

    Polymers for Membrane Filtration in Water Purification

    Wang C, Li Z, Chen J, Li Z, Yin Y, Cao L, Zhong Y, Wu H (2017) Covalent organic framework modified polyamide nanofiltration membrane with enhanced performance for desalination. J Memb Sci 523:273–281.

  • high performance polyamide nanofiltration membranes enabled

    High performance polyamide nanofiltration membranes enabled

    High performance polyamide nanofiltration membranes enabled by surface modification of imidazolium ionic liquid Highlights•Thin-film composite membranes were modified with an imidazolium ionic liquid.•The membrane features high water permeability (22.5 L/m2h) coupled with good salt rejection.•The membrane exhibits highly improved antibiotics/NaCl separation and antibacterial property

  • improved antifouling properties of polyamide nanofiltration

    Improved antifouling properties of polyamide nanofiltration

    Carboxyls are inherent functional groups of thin-film composite polyamide nanofiltration (NF) membranes, which may play a role in membrane performance and fouling. Their surface presence is attributed to incomplete reaction of acyl chloride monomers during the membrane active layer synthesis by interfacial polymerization.