Sulfonated halloysite nanotubes/polyethersulfone nanocomposite membrane for efficient dye purification

Wang, Yuanming; Zhu, Junyong; Dong, Guanying; Zhang, Yatao; Guo, Ningning; Liu, Jindun

doi:10.1016/j.seppur.2015.07.005

Cited by 86 publications

(33 citation statements)

References 48 publications

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“…193 HNTs can easily be dispersed in a polymer matrix, even at high loading due to their tubular shape, low density of hydroxyl functional groups, and well-crystallized structure. [194][195][196][197] In contrast with other NPs, HNTs can be obtained easily and are much cheaper.…”

Section: Embedding Halloysite Nanotubesmentioning

confidence: 99%

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Recent advances in hydrophilic modification and performance of polyethersulfone (PES) membrane via additive blending

2018

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The blending of additives in the polyethersulfone (PES) matrix is an important approach in the membrane industry to reduce membrane hydrophobicity and improve the performance (flux, solute rejection, and reduction of fouling). Several (hydrophilic) modifications of the PES membrane have been developed.Given the importance of the hydrophilic modification methods for PES membranes and their applications, we decided to dedicate this review solely to this topic. The types of additives embedded into the PES matrix can be divided into two main categories: (i) polymers and (ii) inorganic nanoparticles (NPs). The introduced polymers include polyvinylpyrrolidone, chitosan, polyamide, polyethylene oxide, and polyethylene glycol. The introduced nanoparticles discussed include titanium, iron, aluminum, silver, zirconium, silica, magnesium based NPs, carbon, and halloysite nanotubes. In addition, the applications of hydrophilic PES membranes are also reviewed. Reviewing the research progress in the hydrophilic modification of PES membranes is necessary and imperative to provide more insights for their future development and perhaps to open the door to extend their applications to other more challenging areas. IntroductionPolyethersulfone (PES) is a recognized polymeric material, which is widely employed in the fabrication of membranes for various applications. Due to its high glass transition temperature (225 C), and amorphous and transparent properties, PES possesses a high mechanical and hydrolytic stability, thermal and chemical resistance, and outstanding oxidative characteristics, 1 making it ideal for the preparation of asymmetric membranes with different surfaces and pore sizes. 1-3Asymmetric PES membranes are generally prepared via a phaseseparation method. The nal membrane properties and performance are inuenced by the composition (additives, View Article OnlineView Journal | View Issue concentration, and solvent), temperature of the doping solution, the non-solvent or the mixture of non-solvents, and the coagulation bath or the environment. 4 The risk of the fouling effect due to the high hydrophobicity of PES, especially in protein-contacting applications and aqueous ltrations, limits their wide applications.2,3 Numerous research studies have reported efforts to enhance the hydrophilicity of the PES membrane surface. 1,5Basically, the water contact angle (WCA) formed between the membrane-liquid boundary and liquid-gas tangent is generally employed to evaluate the hydrophilic properties of the membrane.6 Commercial PES membranes are hydrophobic in nature with high mechanical, chemical, and thermal stability. 7Usually, these membranes possesses high WCA values and are prone to solute adsorption from various feed streams. It has been well documented that membranes with hydrophilic surfaces are less prone to the fouling effect with microorganisms and organic substances due to: (i) a decreased interaction between the membrane surface and foulant, and (ii) no interaction of hydrogen bonds in the boundary layer betw...

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Section: Embedding Halloysite Nanotubesmentioning

confidence: 99%

“…193 193 presented a sulfonated halloysite nanotubes (HNTs-SO 3 H)/PES membrane. To prepare highly crosslinked HNTs-SO 3 H, styrene was graed onto HNTs surface via distillation-precipitation polymerization and then sulfonated with concentrated sulfuric acid.…”

Section: 199mentioning

confidence: 99%

Recent advances in hydrophilic modification and performance of polyethersulfone (PES) membrane via additive blending

2018

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“…Despite the great contribution of the above-mentioned studies on inclusion of HNTs into polymeric membrane matrixes, previous studies used raw or modified HNTs embedding with other membrane polymers [40,42,43,[47][48][49][50][51][52][53][54][55][56][57][58][59][60][61][62][63][64][65] modified HNTs with PSF [46,66], raw HNT with PSF/PVP matrix for the preparation of porous substrate for thin film nanocomposite membranes [45,67] or used other membrane fabrication methods, such as the electrospinning technique [68,69].…”

Section: Introductionmentioning

confidence: 99%

Polysulfone Membranes Embedded with Halloysites Nanotubes: Preparation and Properties

et al. 2019

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In the present study, nanocomposite ultrafiltration membranes were prepared by incorporating nanotubes clay halloysite (HNTs) into polysulfone (PSF) and PSF/polyvinylpyrrolidone (PVP) dope solutions followed by membrane casting using phase inversion method. Characterization of HNTs were conducted using scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), and thermogravimetric (TGA) analysis. The pore structure, morphology, hydrophilicity and mechanical properties of the composite membranes were characterized by using SEM, water contact angle (WCA) measurements, and dynamic mechanical analysis. It was shown that the incorporation of HNTs enhanced hydrophilicity and mechanical properties of the prepared PSF membranes. Compared to the pristine PSF membrane, results show that the total porosity and pore size of PSF/HNTs composite membranes increased when HNTs loadings were more than 0.5 wt % and 1.0 wt %, respectively. These findings correlate well with changes in water flux of the prepared membranes. It was observed that HNTs were homogenously dispersed within the PSF membrane matrix at HNTs content of 0.1 to 0.5 wt % and the PSF/HNTs membranes prepared by incorporating 0.2 wt % HNTs loading possess the optimal mechanical properties in terms of elastic modulus and yield stress. In the case of the PSF/PVP matrix, the optimal mechanical properties were obtained with 0.3 wt % of HNTs because PVP enhances the HNTs distribution. Results of bovine serum albumin (BSA) filtration tests indicated that PSF/0.2 wt % HNTs membrane exhibited high BSA rejection and notable anti-fouling properties.

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“…Among some disadvantages of the membranes of polyethersulfone, can be highlighted: low hydrophilicity and permeability what can cause membrane fouling 13 . For this reason, there is another line of study that are the nanocomposite membranes, adding to the polymer matrix clay materials, aiming to improve mechanical properties and reduce costs 14 .…”

Section: Introductionmentioning

confidence: 99%

Study of The Influence of Viscosity on The Morphology of Polyethersulfone Hollow Fiber Membranes/Additives

et al. 2019

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The aim of this work was to prepare hollow fiber membrane changing the composition of polyethersulfone, polyvinylpyrrolidone (PVP) and clay, through the phase inversion technique, evaluating the influence of these constituents on the viscosity and distinct morphologies. Flat membranes were produced and their contact angles were determined and showed difference when clay was added and/or PVP. For the hollow fiber membranes, the +addition of these constituents, PVP and/or clay in the solution, can change significantly the viscosity and effect the membrane formation. From the scanning electron microscopy (SEM) images, it was identified the influence on morphology with the compositional variation of each additive, with the PVP promoting shorter precipitation time, favoring the formation of pores of the "fingers" type and increasing the presence of macrovoids. The addition of clay favored the formation of spherical pores, reducing the presence of macropores.

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Sulfonated halloysite nanotubes/polyethersulfone nanocomposite membrane for efficient dye purification

Cited by 86 publications

References 48 publications

Recent advances in hydrophilic modification and performance of polyethersulfone (PES) membrane via additive blending

Recent advances in hydrophilic modification and performance of polyethersulfone (PES) membrane via additive blending

Polysulfone Membranes Embedded with Halloysites Nanotubes: Preparation and Properties

Study of The Influence of Viscosity on The Morphology of Polyethersulfone Hollow Fiber Membranes/Additives

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