Polyaniline/polysulfone ultrafiltration membranes with improved permeability and anti-fouling behavior

Yuan, Xiao-Tong; Wu, Lei; Wang, Tao; Wang, Luda; Wang, Wenyi; Yuan, Xue-Shuang; He, Benqiao; Jiang, Yi-Xuan; Ning, Yu-Jie; Zhu, Zhenjun; Li, Jianxin

doi:10.1016/j.jwpe.2020.101903

Cited by 25 publications

(10 citation statements)

References 55 publications

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“…The water permeation decline in this step is the result of pores blocking and adsorption . After deionized water cleaning, the normalized deionized water flux of both Kevlar and PVDF membranes increased but did not recover to the initial deionized water flux level due to irreversible membrane fouling . Compared with the Kevlar membrane, the PVDF membrane suffered more serious fouling and irreversible membrane fouling.…”

Section: Resultsmentioning

confidence: 99%

“…44 After deionized water cleaning, the normalized deionized water flux of both Kevlar and PVDF membranes increased but did not recover to the initial deionized water flux level due to irreversible membrane fouling. 45 Compared with the Kevlar membrane, the PVDF membrane suffered more serious fouling and irreversible membrane fouling. Specifically, compared to Kevlar membrane, the commercial PVDF membrane showed a higher loss in permeance both in HA and BSA, i.e., 92.3% (final flux: 43.7 (L bar −1 m −2 h −1 )) and 82.9% (final flux: 97.1 (L bar −1 m −2 h −1 )), respectively, whereas our prepared Kevlar-2.0 membrane showed 72.6% (final flux: 122.7 (L bar −1 m −2 h −1 )) and 50.6% (final flux: 221.2 (L bar −1 m −2 h −1 )) permeance drop.…”

Section: Antifouling Performance Of Kevlarmentioning

confidence: 99%

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Nanofibrous Kevlar Hydrogel Ultrafiltration Membrane with High Acid Resistance and Antifouling Properties for Wastewater Treatment

et al. 2022

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Membrane fouling and acidic environment instability are inevitable problems restricting the widespread application of membranes in wastewater treatment. Herein, we report a polyelectrolyte hydrogel membrane with high acid resistance and antifouling properties synthesized by phase inversion of Kevlar nanofibers solution. The hydrogel membrane, compared to the commercial PVDF membrane, has a higher rejection of Congo Red, Direct Red 23, and Direct Red 80 solutions, and excellent antifouling performance when filtering bovine serum protein or humic acid solution. The high antifouling performance is attributed to a large number of hydrophilic groups in the structure of the hydrogel, which can induce the formation of a protective layer of hydration, thus reducing the pollutants adsorbed on the surface. Besides, the acid resistance ability of the Kevlar membrane was verified by a phosphoric acid (pH = 0) immersion experiment. Due to the superior performance of this membrane and the onestep preparation process, the developed Kevlar membrane has great potential applications for wastewater treatment.

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Section: Resultsmentioning

confidence: 99%

Section: Antifouling Performance Of Kevlarmentioning

confidence: 99%

Nanofibrous Kevlar Hydrogel Ultrafiltration Membrane with High Acid Resistance and Antifouling Properties for Wastewater Treatment

et al. 2022

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“…Generally, big pore size will be corresponding to a high pure water flux and a low rejection. Yuan et al 38 found that the blend PSF membrane with 2 wt% polyaniline along with 38.4 nm pore radius had 92% BSA rejection, which was less than 97% rejection of the pristine PSF membrane with 23.5 nm pore radius. However, our BSA rejection rates appeared to have a negative interrelation to the water contact angle.…”

Section: Separation Propertiesmentioning

confidence: 99%

“…This result was in accordance with those in literatures. 38,39 Membrane morphology can be explained by phase inversion process. DMF in the casting solutions had high mutual affinity to water, which would lead to instantaneous liquid-liquid demixing-the polymer-poor phase and the polymer-rich phase.…”

Section: Sem Images Of Top Surfaces and Cross-sections Of Psf Cm-psf ...mentioning

confidence: 99%

“…For example, the membrane T-PSF had 78.38% porosity and 49.86 nm pore size, which were higher and bigger than 58.41% porosity and 18.29 nm pore size of pristine PSF membrane, respectively. Yuan et al 38 found that the blend PSF membrane with 2 wt% polyaniline had 52.5% porosity and 38.4 nm pore radius, while porosity and pore radius of pristine PSF membrane were 46.1% and 23.5 nm, respectively. The acidification (comparing AT- The above-mentioned result was on contrary to that reported by Yao.…”

Section: Sem Images Of Top Surfaces and Cross-sections Of Psf Cm-psf ...mentioning

confidence: 99%

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Modification and acidification of polysulfone as effective strategies to enhance adsorptive ability of chromium (VI) and separation properties of ultrafiltration membrane

Huang

Cai

Zhou

2022

J of Applied Polymer Sci

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In order to improve the hydropilicity, polysulfone was first modified by grafting diethanolamine and further made into the ultrafiltration membranes by a phase inversion process. Ultrafiltration membranes were characterized by nuclear magnetic resonance spectrum, contact angle, thermogravimetric analysis, differential scanning calorimetry, scanning electron microscopy, adsorption, and ultrafiltration experiments. The ultrafiltration membrane containing tertiary amine groups had a 99.2% rejection to bovine serum albumin (BSA), 235.2 L m−2 h−1 pure water flux and 78.6% flux recovery rate. Usually, the ultrafiltration membrane containing tertiary amine groups has a low rejection and a poor adsorptive ability to Cr(VI) in the neutral condition. A novel strategy of acidification in advance was adopted to adjust the separation performance of the polysulfone ultrafiltration membrane containing tertiary amine groups. The pre‐acidification strategy could improve the Cr(VI) rejection from below 10% to 100% in the neutral condition, since ultrafiltration membranes acidified in advance did not lose its H+ in storage. Moreover, the acidification could improve the glass transition temperature and only caused a slight decrease of water flux and BSA rejection.

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Successful preparation of polyaniline‐modified polystyrene novel composite membrane

Sichali,

Noby,

Naragino

et al. 2023

J of Applied Polymer Sci

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This work describes the polyaniline (PANI) nanoparticles' impregnation into the polystyrene (PS) membrane and its impact on the different membrane properties for the first time. PANI nanoparticles were synthesized separately using the oxidative polymerization technique and then impregnated into the polystyrene‐DMF matrix solution. Membranes were cast via the Non‐Solvent Induced Phase Separation (NIPS) process. The surface and structural properties of the fabricated membranes were thoroughly characterized using contact angle measurement (CA), x‐ray diffraction (XRD), Fourier‐transform infrared spectrometer (FTIR), and scanning electron microscopy (SEM). Thermal gravimetric analysis (TGA) and the mechanical characteristics of the membrane were also investigated. According to the CA results, the addition of PANI in the matrix improved the polystyrene membrane's hydrophilicity from 65° to 54.5°. The FTIR spectra revealed that the PANI nanoparticles were successfully impregnated into the PS matrix. SEM images illustrated that the porosity of the PANI‐modified membrane was enhanced by 50% compared to the pristine PS membrane. Furthermore, adding PANI to the PS membrane significantly reduced the average pore size. The filtration experiment showed that PANI modified membrane had 81% rejection of MO dye as compared to the pristine PS membrane which had 60%. Therefore, The PANI added to the PS membrane greatly enhanced the PS membrane's structural properties.

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Polyaniline/polysulfone ultrafiltration membranes with improved permeability and anti-fouling behavior

Cited by 25 publications

References 55 publications

Nanofibrous Kevlar Hydrogel Ultrafiltration Membrane with High Acid Resistance and Antifouling Properties for Wastewater Treatment

Nanofibrous Kevlar Hydrogel Ultrafiltration Membrane with High Acid Resistance and Antifouling Properties for Wastewater Treatment

Modification and acidification of polysulfone as effective strategies to enhance adsorptive ability of chromium (VI) and separation properties of ultrafiltration membrane

Successful preparation of polyaniline‐modified polystyrene novel composite membrane

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