Sulfonated multiwall carbon nanotubes assisted thin-film nanocomposite membrane with enhanced water flux and anti-fouling property

Zheng, Junfeng; Li, Meng; Yu, Kai; Hu, Jiahui; Zhang, Xuan; Wang, Lianjun

doi:10.1016/j.memsci.2016.11.032

Cited by 202 publications

(68 citation statements)

References 47 publications

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“…5, which ranges from 34.26 to 38.44 nm. It's clear that pore size of the substrate increases with the rise of the hydrophilicity of the substrates, which is consistent with the membrane morphology and can be attributed to the comprehensive effects of precipitation kinetics and different phase separation processes [1,44]. The smaller pores of the substrates perhaps produce PA layer with smaller water permeability [45], which will be discussed in the following.…”

Section: Influences Of Addition Of Different Nanofillers On Substratessupporting

confidence: 65%

“…5, the thickness of the substrates is in a range of 74.00 to 95.50μm, which descends at first and then increases as reported in previous work [46]. The improved contents of hydrophilic groups result in a thinner and more porous membrane since hydrophilic polymers could tolerate the higher water content before the phase separation [1]. However, the enhanced hydrophilicity of the dope solution with the blending of the two additions causes the enhanced phase separation and leads to the larger thickness of the PVDF substrates.…”

Section: Influences Of Addition Of Different Nanofillers On Substratessupporting

confidence: 55%

“…Nowadays, the water shortage seriously threatens the survival of human beings' living and development of economy [1][2][3]. Lately, forward osmosis (FO) process works with lower external pressure while the reverse osmosis (RO) process is widely used to produce pure water as an advanced and energy-saving technology [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Enhanced performance of forward osmosis membranes by incorporating PVDF substrates with hydrophilic nanofillers

Cui¹,

Yan²,

Chen³

et al. 2019

Desalination and Water Treatment

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a b s t r a c tHydrophilic attapulgite (AT) and functional oxidized multi-walled carbon nanotubes (O-MWCNTs) are introduced to the polyvinylidene fluoride (PVDF) substrates to prepare improved performance of thin-film composite (TFC) membranes for forward osmosis (FO) process. The improved hydrophilicity of substrates can make for forming free-defect polyamide (PA) layer and enhance the permeability performance of the as-prepared TFC membranes. The effects of the single or composite addition of two nanofillers on the hydrophilicity, membrane morphology, porosity and mechanical strength of as-prepared substrates are investigated in detail. The results show that hydrophilic, porous and high-flux substrates are prepared and the corresponding TFC membranes own improved water flux and better selectivity. In a word, the PVDF/AT/O-MWCNTs TFC membrane receives a better water flux (J v ) of 28.23 and 20.37 L.m -2 .h -1 and a lower reverse salt flux (J s ) of 9.5 and 6.5 g.m -2 .h -1 in pressure-retarded osmosis (PRO) mode (active layer facing draw solution, AL-DS) and FO mode (active layer facing feed solution, AL-FS). The draw solution and feed solution are 2M NaCl aqueous solution and deionized (DI) water, respectively. This study develops a brand-new way for preparing substrate for FO process.

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Section: Influences Of Addition Of Different Nanofillers On Substratessupporting

confidence: 65%

Section: Influences Of Addition Of Different Nanofillers On Substratessupporting

confidence: 55%

See 1 more Smart Citation

Enhanced performance of forward osmosis membranes by incorporating PVDF substrates with hydrophilic nanofillers

Cui¹,

Yan²,

Chen³

et al. 2019

Desalination and Water Treatment

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“…In order to measure thermal stability of membrane with temperature variation, thermo gravimetric analysis (TGA) technique is used [227][228][229][230][231]. Thermal properties of membrane should be higher.…”

Section: Thermo Gravimetric Analysis (Tga)mentioning

confidence: 99%

A Comprehensive Review on Polymeric Nano-Composite Membranes for Water Treatment

Zahid¹,

Rashid²,

Akram³

et al. 2018

J Membr Sci Technol

188

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During last few decades, membrane technology has emerged as an efficient technique over conventional methods due to its high removal capacity, ease in operation and cost effectiveness for wastewater treatment and production of clean water. Membrane based separations are commonly based on polymeric membranes because of their higher flexibility, easily pore forming mechanism, low cost and smaller space for installation as compared to inorganic membranes. Commonly employed membrane fabrication phase inversion method has been shortly reviewed in this article. Major limitation of membrane based separations is fouling and polymeric membranes being hydrophobic in nature are more prone to fouling. Fouling is a deposition of various colloidal particles, macromolecules (polysaccharides, proteins), salts etc. on membrane surface and within pores thus impedes membrane performance, reduces flux and results in high cost. Modification of polymeric membranes due to its tailoring ability with nanomaterials such as metal based and carbon based results in polymeric nano-composite membranes with high antifouling characteristics. Nanomaterials impart high selectivity, permeability, hydrophilicity, thermal stability, mechanical strength, and antibacterial properties to polymeric membranes via blending, coating etc. modification methods. Characterization techniques has also discussed in later section for studying morphological properties and performance of polymer nano-composite membranes. Graphical Abstract

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“…The studies showed that the incorporation of nano-materials into the PA layers of TFC membranes could improve physicochemical properties such as anti-fouling ability, chlorine resistance and their permselectivity. 3,4 To date, a variety of nano-materials have been incorporated into PA layers as nanollers, such as zeolite, 5,6 carbon materials (e.g., nanotubes and graphene oxide), 7,8 oxides, 9,10 metal nanoparticles 11 and metal organic frameworks, 12,13 etc. In our previous work, the water ux was increased by 19.1% though the incorporation of hydrotalcite (HT) in a polyamide skin layer.…”

Section: Introductionmentioning

confidence: 99%

Development of high-performance mixed matrix reverse osmosis membranes by incorporating aminosilane-modified hydrotalcite

Cao¹,

Wang²,

Chen³

et al. 2020

RSC Adv.

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Sulfonated multiwall carbon nanotubes assisted thin-film nanocomposite membrane with enhanced water flux and anti-fouling property

Cited by 202 publications

References 47 publications

Enhanced performance of forward osmosis membranes by incorporating PVDF substrates with hydrophilic nanofillers

Enhanced performance of forward osmosis membranes by incorporating PVDF substrates with hydrophilic nanofillers

A Comprehensive Review on Polymeric Nano-Composite Membranes for Water Treatment

Development of high-performance mixed matrix reverse osmosis membranes by incorporating aminosilane-modified hydrotalcite

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