Composite Membranes with Cellulose Acetate Surface Layer for Water Treatment

Membrane technologies are currently among the most demanded. This is evidenced by their variety and a wide range of membrane applications in the most topical areas of human life. This work proposes a simple and inexpensive method for producing composite membranes for ultrafiltration and nanofiltration with a surface layer of cellulose acetate for water purification and water treatment processes. A nylon microfiltration membrane was used as a membrane base. The surface layer was obtained by immersion in a solution of cellulose acetate in acetone. Composite membranes with different retention properties were obtained depending on the number of deposited layers. The resulting membranes were examined for total porosity, water absorption, cellulose acetate content, contact angle, and IR absorption spectra. The specific productivity of the obtained membranes with respect to distilled water was also established.

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Simple Scalable Fabrication of Laser-Induced Graphene Composite Membranes for Water Treatment

ACS ES&T Water ◽

10.1021/acsestwater.0c00226 ◽

2021 ◽

Vol 1 (4) ◽

pp. 881-887

Author(s):

Abhishek Gupta ◽

Chetan Prakash Sharma ◽

Christopher J. Arnusch

Keyword(s):

Water Treatment ◽

Composite Membranes ◽

Graphene Composite

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Cellulose acetate composite membranes tailored with exfoliated tungsten disulfide nanosheets: Permeation characteristics and antifouling ability

International Journal of Biological Macromolecules ◽

10.1016/j.ijbiomac.2018.04.091 ◽

2018 ◽

Vol 115 ◽

pp. 540-546 ◽

Cited By ~ 12

Author(s):

S. Vetrivel ◽

M. Sri Abirami Saraswathi ◽

D. Rana ◽

K. Divya ◽

A. Nagendran

Keyword(s):

Cellulose Acetate ◽

Composite Membranes ◽

Tungsten Disulfide ◽

Antifouling Ability

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Supercritical Phase Inversion: A Powerful Tool for Generating Cellulose Acetate-AgNO3 Antimicrobial Membranes

Materials ◽

10.3390/ma13071560 ◽

2020 ◽

Vol 13 (7) ◽

pp. 1560

Author(s):

Lucia Baldino ◽

Stefano Cardea ◽

Ernesto Reverchon

Keyword(s):

Cellulose Acetate ◽

Phase Inversion ◽

Active Agent ◽

Composite Membranes ◽

Time Interval ◽

Membrane Pore ◽

Supercritical Phase ◽

Silver Nitrate Concentration ◽

Membrane Pore Size ◽

Silver Release

Antimicrobial composite membranes, formed by cellulose acetate loaded with AgNO3 particles, were produced by supercritical phase inversion. Different cellulose acetate concentrations were tested (15%, 20%, 30%(w/w)), whereas the active agent (i.e., silver nitrate) concentration was fixed at 0.1%(w/w) with respect to the quantity of polymer used. To determine the influence of the process parameters on membranes morphology, the pressure and temperature were varied from 150 to 250 bar and from 55 to 35 °C, respectively. In all cases, regularly porous membranes were produced with a uniform AgNO3 distribution in the membrane matrix. Silver release rate depended on membrane pore size, covering a time interval from 8 to 75 h.

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Strategies in Forward Osmosis Membrane Substrate Fabrication and Modification: A Review

Membranes ◽

10.3390/membranes10110332 ◽

2020 ◽

Vol 10 (11) ◽

pp. 332 ◽

Cited By ~ 1

Author(s):

Nur Diyana Suzaimi ◽

Pei Sean Goh ◽

Ahmad Fauzi Ismail ◽

Stanley Chinedu Mamah ◽

Nik Ahmad Nizam Nik Malek ◽

...

Keyword(s):

Water Treatment ◽

Membrane Fouling ◽

Forward Osmosis ◽

Composite Membranes ◽

High Energy ◽

Future Perspective ◽

Selective Layer ◽

Long Duration ◽

Selective Membrane ◽

Separation Performances

Forward osmosis (FO) has been recognized as the preferred alternative membrane-based separation technology for conventional water treatment technologies due to its high energy efficiency and promising separation performances. FO has been widely explored in the fields of wastewater treatment, desalination, food industry and bio-products, and energy generation. The substrate of the typically used FO thin film composite membranes serves as a support for selective layer formation and can significantly affect the structural and physicochemical properties of the resultant selective layer. This signifies the importance of substrate exploration to fine-tune proper fabrication and modification in obtaining optimized substrate structure with regards to thickness, tortuosity, and porosity on the two sides. The ultimate goal of substrate modification is to obtain a thin and highly selective membrane with enhanced hydrophilicity, antifouling propensity, as well as long duration stability. This review focuses on the various strategies used for FO membrane substrate fabrication and modification. An overview of FO membranes is first presented. The extant strategies applied in FO membrane substrate fabrications and modifications in addition to efforts made to mitigate membrane fouling are extensively reviewed. Lastly, the future perspective regarding the strategies on different FO substrate layers in water treatment are highlighted.

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