Carbon nanofibers/chitosan nanocomposite thin film for surface modification of poly(ether sulphone) nanofiltration membrane

Hosseini, S.M.; Moradi, Faezeh; Farahani, Samaneh Koudzari; Bandehali, Samaneh; Parvizian, Fahime; Ebrahimi, Mojtaba; Shen, Jiangnan

doi:10.1016/j.matchemphys.2021.124720

Cited by 39 publications

(12 citation statements)

References 44 publications

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“…The increase in the gelation time decreases the hydrodynamic water flux of the PA6 membranes. Generally, the hydrodynamic water flux is considerably affected by several factors, such as the mean pore size, porosity, morphology, and hydrophilicity of the membrane [ 36 , 47 ]. It is shown that the values of both mean pore size and porosity are reduced with an increase in gelation time ( Table 4 ).…”

Section: Resultsmentioning

confidence: 99%

“…It can be assumed that cosθ = 1 if the liquid wets the membrane. Moreover, the porosity of the PA6 membrane was measured by the following equation [36,42]:…”

Section: Mean Pore Size and Porosity Measurementsmentioning

confidence: 99%

“…The values of water uptake for PA6 membranes were calculated using Equation (6). The measurements were repeated three times for each sample to estimate the measurement accuracy [ 36 , 37 ].

…”

Section: Characterization Of Pa6 Membranesmentioning

confidence: 99%

“…It can be assumed that cosθ = 1 if the liquid wets the membrane. Moreover, the porosity of the PA6 membrane was measured by the following equation [ 36 , 42 ]:

where W wet , and W dry are wet and dry membrane weight (kg), respectively, ρ water , A, and L are the water density (kg m −3 ), the membrane surface area (m 2 ), and the membrane thickness (m). The membrane porosity was measured three times for each membrane to estimate the accuracy of measurement.…”

Section: Characterization Of Pa6 Membranesmentioning

confidence: 99%

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Fabrication of Polyamide-6 Membranes—The Effect of Gelation Time towards Their Morphological, Physical and Transport Properties

2022

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Porous polyamide-6 membranes were fabricated via a non-solvent induced phase inversion method, and the influence of gelation time on the properties of the membranes was investigated. Membrane samples with various gelation times were prepared. The evaluation of the membranes’ properties was carried out by various analyses and tests, such as scanning electron microscopy, atomic force microscopy, contact angle, wet and dry thickness, mean pore size measurements, porosity, water uptake, mechanical resistance, hydrodynamic water fluxes, membrane hydrodynamic permeability, and retention testing. The scanning electron microscopy images (both surface and cross-section) demonstrated that the increase in gelation time from 0 (M0) to 10 (M10) min led to the morphological change of membranes from isotropic (M0) to anisotropic (M10). The wet and dry thickness of the membranes showed a downward tendency with increasing gelation time. The M0 membrane exhibited the lowest bubble contact angle of 60 ± 4° and the lowest average surface roughness of 124 ± 22 nm. The highest values of mean pore size and porosity were observed for the M0 sample (0.710 ± 0.06 µm and 72 ± 2%, respectively), whereas the M10 membrane demonstrated the highest tensile strength of 4.1 MPa. The membrane water uptake was diminished from 62 to 39% by increasing the gelation time from 0 to 10 min. The M0 membrane also showed the highest hydrodynamic water flux among the prepared membranes, equal to 28.6 L m−2 h−1 (at Δp = 2 bar).

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Section: Resultsmentioning

confidence: 99%

“…It can be assumed that cosθ = 1 if the liquid wets the membrane. Moreover, the porosity of the PA6 membrane was measured by the following equation [36,42]:…”

Section: Mean Pore Size and Porosity Measurementsmentioning

confidence: 99%

“…The values of water uptake for PA6 membranes were calculated using Equation (6). The measurements were repeated three times for each sample to estimate the measurement accuracy [ 36 , 37 ].

…”

Section: Characterization Of Pa6 Membranesmentioning

confidence: 99%

“…It can be assumed that cosθ = 1 if the liquid wets the membrane. Moreover, the porosity of the PA6 membrane was measured by the following equation [ 36 , 42 ]:

Section: Characterization Of Pa6 Membranesmentioning

confidence: 99%

See 2 more Smart Citations

Fabrication of Polyamide-6 Membranes—The Effect of Gelation Time towards Their Morphological, Physical and Transport Properties

2022

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“…In this way, many studies have successfully improved the antifouling ability of PA, graphene oxide (GO), cellulose, NF membranes, etc. [23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Sodium Chloroacetate Modified Polyethyleneimine/Trimesic Acid Nanofiltration Membrane to Improve Antifouling Performance

Pang

Yong

et al. 2021

Membranes

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Nanofiltration (NF) is a separation technology with broad application prospects. Membrane fouling is an important bottleneck-restricting technology development. In the past, we prepared a positively charged polyethyleneimine/trimesic acid (PEI/TMA) NF membrane with excellent performance. Inevitably, it also faces poor resistance to protein contamination. Improving the antifouling ability of the PEI/TMA membrane can be achieved by considering the hydrophilicity and chargeability of the membrane surface. In this work, sodium chloroacetate (ClCH2COONa) is used as a modifier and is grafted onto the membrane surface. Additionally, 0.5% ClCH2COONa and 10 h modification time are the best conditions. Compared with the original membrane (M0, 17.2 L m−2 h−1), the initial flux of the modified membrane (M0-e, 30 L m−2 h−1) was effectively increased. After filtering the bovine albumin (BSA) solution, the original membrane flux dropped by 47% and the modified membrane dropped by 6.2%. The modification greatly improved the antipollution performance of the PEI/TMA membrane.

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Improving dye removal ability and fouling resistance of thin‐film nanocomposite nanofiltration membranes using a new citric acid functionalized FSM‐16 mesoporous

Mohammadifar,

Rahimi,

Zinadini

2024

J of Applied Polymer Sci

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The development of superior thin‐film nanocomposite (TFN) membranes with good separation performance and anti‐fouling capacity is required to address the larger‐scale freshwater need. In this study, a new citric acid‐functionalized FSM‐16 (CA‐FSM‐16) mesoporous was successfully synthesized and characterized. Subsequently, it was introduced on the surface of the sodium hydroxide/cyanuric chloride‐activated PES membrane to fabricate the CA‐FSM‐16 TFN membrane. It was investigated how various CA‐FSM‐16 loadings affected the overall physicochemical characteristics and performance of the membrane. The SEM analysis confirmed the TFN structure of the fabricated membranes. All manufactured membranes displayed improved hydrophilicity and flux. For the pristine membrane, the salt (Na2SO4) rejection was measured 73.20 ± 2.10%, whereas for the TFN‐0.08 membrane, it was measured 91.40 ± 1.80%. The dye rejection experiment in cross‐flow filtration showed that the TFN‐0.08 membrane had the maximum licorice retention among the membranes (99.10 ± 2.00%). In addition, the CA‐FSM‐16 TFN membranes demonstrated superior antifouling performance, especially the optimum membrane (TFN‐0.08), which showed a high flux recovery ratio (FRR) of 97.10 ± 1.90% and a low irreversible fouling ratio (DRir) of 2.90%. The introduction of CA‐FSM‐16 on the surface of the PES membrane via the surface modification method was a potentially useful technology to fabricate a high‐performing TFN membrane for water treatment applications.

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Carbon nanofibers/chitosan nanocomposite thin film for surface modification of poly(ether sulphone) nanofiltration membrane

Cited by 39 publications

References 44 publications

Fabrication of Polyamide-6 Membranes—The Effect of Gelation Time towards Their Morphological, Physical and Transport Properties

Fabrication of Polyamide-6 Membranes—The Effect of Gelation Time towards Their Morphological, Physical and Transport Properties

Sodium Chloroacetate Modified Polyethyleneimine/Trimesic Acid Nanofiltration Membrane to Improve Antifouling Performance

Improving dye removal ability and fouling resistance of thin‐film nanocomposite nanofiltration membranes using a new citric acid functionalized FSM‐16 mesoporous

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