Polyurethane TFC nanofiltration membranes based on interfacial polymerization of poly(bis-MPA) and MDI on the polyethersulfone support

Mahdavi, Hossein; Razmi, Fariba; Shahalizade, Taieb

doi:10.1016/j.seppur.2016.02.018

Cited by 36 publications

(12 citation statements)

References 42 publications

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“…The inner layer contains a cavity, which serves as a membrane reinforcement and a filter. In the inner layer, gaps are formed due to dense cross-bonding of hollow urethane cross-linking [40,41]. Furthermore, the SEM image in Figure 4 shows a layer formation, and the outer layer looked tighter than the inner.…”

Section: Polyurethane Membranementioning

confidence: 98%

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Synthesis of Polyurethane Membranes Derived from Red Seaweed Biomass for Ammonia Filtration

et al. 2021

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The development of membrane technology is rapidly increasing due to its numerous advantages, including its ease of use, chemical resistant properties, reduced energy consumption, and limited need for chemical additives. Polyurethane membranes (PUM) are a particular type of membrane filter, synthesized using natural organic materials containing hydroxy (-OH) groups, which can be used for water filtration, e.g., ammonia removal. Red seaweed (Rhodophyta) has specific molecules which could be used for PUM. This study aimed to ascertain PUM synthesis from red seaweed biomass (PUM-RSB) by using toluene diisocyanate via the phase inversion method. Red seaweed biomass with a particle size of 777.3 nm was used as starting material containing abundant hydroxy groups visible in the FTIR spectrum. The PUM-RSB produced was elastic, dry, and sturdy. Thermal analysis of the membrane showed that the initial high degradation temperature was 290.71 °C, while the residue from the thermogravimetric analysis (TGA) analysis was 4.88%. The PUM-RSB section indicates the presence of cavities on the inside. The mechanical properties of the PUM-RSB have a stress value of 53.43 MPa and a nominal strain of 2.85%. In order to optimize the PUM-RSB synthesis, a Box–Behnken design of Response Surface Methodology was conducted and showed the value of RSB 0.176 g, TDI 3.000 g, and glycerin 0.200 g, resulting from the theoretical and experimental rejection factor, i.e., 31.3% and 23.9%, respectively.

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Section: Polyurethane Membranementioning

confidence: 98%

“…The inner layer contains a cavity, which serves as a membrane reinforcement and a filter. In the inner layer, gaps are formed due to dense cross-bonding of hollow urethane cross-linking [40,41]. Thermogravimetric Analysis (TGA) was applied against temperature.…”

Section: Polyurethane Membranementioning

confidence: 99%

Synthesis of Polyurethane Membranes Derived from Red Seaweed Biomass for Ammonia Filtration

et al. 2021

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“…The thin selective layer formed by the IP process endows the NF membrane with a high flux and an excellent rejection performance. Additionally, the required flux and rejection performance of the NF membranes can be optimized by adjusting the preparation conditions of the selective layer . Although the TFC‐NF membranes have many advantages, it is undeniable that the relatively higher operation pressure is still an obstacle that restricts the wide use of NF membranes.…”

Section: Introductionmentioning

confidence: 99%

SiO₂‐modified nanocomposite nanofiltration membranes with high flux and acid resistance

Wei

et al. 2019

J of Applied Polymer Sci

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Thin‐film nanocomposite (TFN) nanofiltration (NF) membranes with superior properties were prepared using hydrophilic SiO2 (HGPN‐SiO2) nanoparticles as the inorganic modifying monomer by an interfacial polymerization (IP) process. The effects of HGPN‐SiO2 on the morphology and surface properties of the prepared NF membranes were characterized by attenuated total reflectance–Fourier transform infrared spectroscopy, field emission scanning electron microscopy, X‐ray photoelectron spectroscopy, atomic force microscopy, surface zeta potential, and static contact angle. The addition of HGPN‐SiO2 can effectively improve the permeate flux of the NF membranes. When the HGPN‐SiO2 concentration in the aqueous phase was 0.08 wt %, the permeate flux of the TFN‐NF membrane was twice that of the pure NF membrane. Furthermore, the acid resistance of the TFN‐NF membrane was clearly improved with the addition of HGPN‐SiO2. Under neutral conditions, the TFN‐NF membrane showed superior flux and salt rejection stability in a long‐running operation. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47436.

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“…At present, researchers around the world have explored many methods to produce membranes with appropriate macropore size structure, especially microfiltration and UF membranes operated at low pressure . In addition, these UF membranes can be used to support composite nanofiltration and reverse osmosis . Under high operating pressures, the pressure‐resistant performance of the supporting membrane, which is mainly reflected in the membrane pore structure, is particularly important.…”

Section: Introductionmentioning

confidence: 99%

Effect of nonsolvent additives on PES ultrafiltration membrane pore structure

Xiang

Hua

Dong

et al. 2019

J of Applied Polymer Sci

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Sponge-like pore (cellular pore) structure of ultrafiltration membrane has special advantages on rejection and anti-pressure performance. The cover by Lei Zhang and colleagues shows a SEM image of spongelike pore structure of PES UF membrane, which was prepared by adding some non-solvent additives. The membrane with fully sponge-like structure retained good operation stability for long time at high pressure. Inevitably, the permeate flux was decreased because of greater mass transfer resistance.

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Polyurethane TFC nanofiltration membranes based on interfacial polymerization of poly(bis-MPA) and MDI on the polyethersulfone support

Cited by 36 publications

References 42 publications

Synthesis of Polyurethane Membranes Derived from Red Seaweed Biomass for Ammonia Filtration

Synthesis of Polyurethane Membranes Derived from Red Seaweed Biomass for Ammonia Filtration

SiO₂‐modified nanocomposite nanofiltration membranes with high flux and acid resistance

Effect of nonsolvent additives on PES ultrafiltration membrane pore structure

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Polyurethane TFC nanofiltration membranes based on interfacial polymerization of poly(bis-MPA) and MDI on the polyethersulfone support

Cited by 36 publications

References 42 publications

Synthesis of Polyurethane Membranes Derived from Red Seaweed Biomass for Ammonia Filtration

Synthesis of Polyurethane Membranes Derived from Red Seaweed Biomass for Ammonia Filtration

SiO2‐modified nanocomposite nanofiltration membranes with high flux and acid resistance

Effect of nonsolvent additives on PES ultrafiltration membrane pore structure

Contact Info

Product

Resources

About

SiO₂‐modified nanocomposite nanofiltration membranes with high flux and acid resistance