Preparation and characterization of cellulose triacetate membranes via thermally induced phase separation

Yu, Yuan; Wu, Qingyun; Liang, Hong‐Qing; Gu, Lin; Xu, Zhi‐Kang

doi:10.1002/app.44454

Cited by 31 publications

(20 citation statements)

References 33 publications

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“…Addition of PEG 400 to the support layer was conducted to fabricate a TFC FO membrane, and it was found that the addition of 6 wt% PEG was needed to reach the highest water flux [23] when DI water and 2 M NaCl were used as feed and draw solution. PEG 400 and dimethyl sulfone (DMSO 2 ) were used as an additive and a crystallizable diluent to fabricate the CTA support layer of an FO membrane through thermally induced phase separation, and the FO membrane exhibited better antifouling properties than PSf-based FO membranes [24]. Sharma et al used PEG 4000 and 6000 as additive to prepare cellulose acetate flat asymmetric FO membranes, and the modified FO membranes were used to evaluate power density performance in pressure-retarded osmosis [25].…”

Section: Peg In the Support Layer Of An Fo Membranementioning

confidence: 99%

Association of Polyethylene Glycol Solubility with Emerging Membrane Technologies, Wastewater Treatment, and Desalination

Du¹,

Bandara²,

Carson³

et al. 2020

Water Quality - Science, Assessments and Policy

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Forward osmosis (FO) and membrane distillation (MD) are two emerging membrane technologies, and both have advantages of low membrane fouling, ability to use for highly saline desalination, and feasibility to integrate with a low-grade heat source like solar collector. Because polyethylene glycol (PEG) is a flexible, water-soluble polymer, it is an essential material used for membrane fabrication and enhancement of membrane properties. Low-molecular-weight PEG sometimes is used as pore constrictor and pore former for developing MD membranes and support layer of FO membranes. Due to the affinity of PEG chains to water molecules, PEG, its derivatives, and copolymers have been widely used in the fabrication/ modification of FO and MD membranes, which are currently applied to bioseparation, wastewater treatment, and desalination in academia and industry at the pilot scale. This chapter covers direct PEG and its membrane separation applications in wastewater treatment and desalination. The advancement of PEG in membrane science and engineering is reviewed and discussed comprehensively. We focus on the effectiveness of PEG on membrane antifouling and the stability of PEG-modified membranes when applied to wastewater treatment and desalination.

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Section: Peg In the Support Layer Of An Fo Membranementioning

confidence: 99%

Association of Polyethylene Glycol Solubility with Emerging Membrane Technologies, Wastewater Treatment, and Desalination

Du¹,

Bandara²,

Carson³

et al. 2020

Water Quality - Science, Assessments and Policy

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“…Cellulose Triacetate (CTA) has been using as popular polymeric membrane material for preparation of ultrafiltration membranes in dialysis, reverse osmosis and Forward Osmosis (FO) since 1960s due to its good desalting properties, suitable toughness, high biocompatibility and cost effectiveness. CTA membranes also possess hydrophilic character thus plays an important role in fouling mitigation [35].…”

Section: Introductionmentioning

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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“…Figure 10 lists the FRR , DR t , and DR ir values of the PSf and PSf-3BL membranes. Among them, DR ir reflects the irreversible fouling, which is very difficult to be eliminated by the hydraulic washing, and the main challenge in the membrane separation [44,47]. Overall, membranes with lower DR ir , DR t , and higher FRR are regarded as having better antifouling performance [3,11].…”

Section: Resultsmentioning

confidence: 99%

“…Deionized water was permeated again as a feed and another pure water flux ( J 2 ) was determined. The flux recovery ratio ( FRR ), the total flux decline ratio ( DR t ), and irreversible flux decline ratio ( DR ir ) can be defined according to the references [1,3,44]:FRR=J2J0×100%, DRt=J0−J1J0×100%, DRnormalinormalr=J0−J2J0×100%.…”

Section: Methodsmentioning

confidence: 99%

Construction of Antifouling Membrane Surfaces through Layer-by-Layer Self-Assembly of Lignosulfonate and Polyethyleneimine

Xie

et al. 2019

Polymers

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Lignin is the second most abundant and low-cost natural polymer, but its high value-added utilization is still lack of effective and economic ways. In this paper, waste lignosulfonate (LS) was introduced to fabricate antifouling membrane surfaces via layer-by-layer self-assembly with polyethyleneimine (PEI). The LS/PEI multilayers were successfully deposited on the polysulfone (PSf) membrane, as demonstrated by ATR-FTIR, XPS, Zeta potential measurements, AFM, and SEM. Meanwhile, the effect of the number of bilayers was investigated in detail on the composition, morphologies, hydrophilicity, and antifouling performance of the membrane surface. As a result, with the bilayer numbers increase to 5, the PSf membrane shows smooth surface with small roughness, and its water contact angle reduces to 44.1°, indicating the improved hydrophilicity. Accordingly, the modified PSf membrane with 5 LS/PEI bilayers repels the adsorption of protein, resulting in good antifouling performance. This work provides a green, facile, and low-cost strategy to construct antifouling membrane surfaces.

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Preparation and characterization of cellulose triacetate membranes via thermally induced phase separation

Cited by 31 publications

References 33 publications

Association of Polyethylene Glycol Solubility with Emerging Membrane Technologies, Wastewater Treatment, and Desalination

Association of Polyethylene Glycol Solubility with Emerging Membrane Technologies, Wastewater Treatment, and Desalination

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

Construction of Antifouling Membrane Surfaces through Layer-by-Layer Self-Assembly of Lignosulfonate and Polyethyleneimine

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