Low pressure-driven thin film composite membranes for Cr (VI) removal based on nanofibrous mats supported layer-by-layer assembly coatings

2014 ◽  
Vol 55 (2) ◽  
pp. 421-428 ◽  
Author(s):  
Miaoxin Zhang ◽  
Jiaona Wang ◽  
Congju Li
Keyword(s):  
Thin Film ◽  
Composite Membranes ◽  
Low Pressure ◽  
Layer By Layer ◽  
Film Composite ◽  
Thin Film Composite ◽  
Layer By Layer Assembly ◽  
Layer Assembly ◽  
Pressure Driven

scholarly journals Thin film composite polyelectrolyte multilayer nanofiltration membrane fabricated using spin assisted layer by layer assembly: Application of solution diffusion film model

2020 ◽  
Vol 5 (1) ◽  
pp. 10-15
Author(s):  
Ahmad Alghamdi ◽  
Farid Fadhillah
Keyword(s):  
Thin Film ◽  
Operating Conditions ◽  
Layer By Layer ◽  
Polyelectrolyte Multilayer ◽  
Film Composite ◽  
Film Model ◽  
Membrane Performance ◽  
Thin Film Composite ◽  
Layer By Layer Assembly ◽  
Layer Assembly

Thin Film Composite (TFC) Polyelectrolyte Multilayer (PEM) Nanofiltration (NF) membrane consisting of multilayer of Poly(diallyl dimethyl ammonium chloride) (PDAC) and Poly(sodium 4-styrenesulfonate) (PSS) deposited on  polyethersulfone (PES) support  was prepared using spin-assisted layer by layer assembly (SA-LbL). This work is an effort to discover new material having better characteristics and performance than commercial polyamide (PA) NF membrane. Two main operating conditions namely temperature and salt concentration were investigated and the effect of both on membrane performance was studied. Solution-diffusion Film Model (SDFM) membrane employing two fitting parameters i.e. membrane salt permeability (PS) and stagnant layer salt permeability PS(d), was used to explain membrane transport across the membrane. The result showed an good agreement between experimental and observed rejection rate suggests PEM membrane behaves similar to typical solution diffusion-type  composite membrane and SDFM can be used to predict the membrane performance and behavior.

Enhancing desalination performance of thin film composite membrane through layer by layer assembly of oppositely charged titania nanosheet

Desalination ◽  
2020 ◽  
Vol 476 ◽  
pp. 114167 ◽  
Author(s):  
Nor Akalili Ahmad ◽  
Pei Sean Goh ◽  
Kar Chun Wong ◽  
Abdul Karim Zulhairun ◽  
Ahmad Fauzi Ismail
Keyword(s):  
Thin Film ◽  
Composite Membrane ◽  
Layer By Layer ◽  
Film Composite ◽  
Thin Film Composite Membrane ◽  
Thin Film Composite ◽  
Layer By Layer Assembly ◽  
Oppositely Charged ◽  
Layer Assembly

Innovative high flux/low pressure blend thin film composite membranes for water softening

2018 ◽  
Vol 131 ◽  
pp. 384-399 ◽  
Author(s):  
Tarek S. Jamil ◽  
Eman S. Mansor ◽  
Heba Abdallah ◽  
A.M. Shaban
Keyword(s):  
Thin Film ◽  
Composite Membranes ◽  
Low Pressure ◽  
High Flux ◽  
Water Softening ◽  
Film Composite ◽  
Thin Film Composite

Thin film composite membranes from polymers of intrinsic microporosity using layer-by-layer method

2019 ◽  
Vol 572 ◽  
pp. 475-479 ◽  
Author(s):  
Praveen Agarwal ◽  
Ian Tomlinson ◽  
Robert E. Hefner ◽  
Shouren Ge ◽  
YuanQiao Rao ◽  
...  
Keyword(s):  
Thin Film ◽  
Composite Membranes ◽  
Layer By Layer ◽  
Film Composite ◽  
Thin Film Composite ◽  
Layer Method ◽  
Polymers Of Intrinsic Microporosity ◽  
Intrinsic Microporosity

scholarly journals Modification of Nanofiber Support Layer for Thin Film Composite forward Osmosis Membranes via Layer-by-Layer Polyelectrolyte Deposition

Membranes ◽  
2018 ◽  
Vol 8 (3) ◽  
pp. 70 ◽  
Author(s):  
Ralph Gonzales ◽  
Myoung Park ◽  
Leonard Tijing ◽  
Dong Han ◽  
Sherub Phuntsho ◽  
...  
Keyword(s):  
Thin Film ◽  
High Performance ◽  
Forward Osmosis ◽  
Composite Membranes ◽  
Structural Parameter ◽  
Layer By Layer ◽  
Film Composite ◽  
Thin Film Composite ◽  
Layer Deposition ◽  
Tfc Membrane

Electrospun nanofiber-supported thin film composite membranes are among the most promising membranes for seawater desalination via forward osmosis. In this study, a high-performance electrospun polyvinylidenefluoride (PVDF) nanofiber-supported thin film composite (TFC) membrane was successfully fabricated after molecular layer-by-layer polyelectrolyte deposition. Negatively-charged electrospun polyacrylic acid (PAA) nanofibers were deposited on electrospun PVDF nanofibers to form a support layer consisted of PVDF and PAA nanofibers. This resulted to a more hydrophilic support compared to the plain PVDF nanofiber support. The PVDF-PAA nanofiber support then underwent a layer-by-layer deposition of polyethylenimine (PEI) and PAA to form a polyelectrolyte layer on the nanofiber surface prior to interfacial polymerization, which forms the selective polyamide layer of TFC membranes. The resultant PVDF-LbL TFC membrane exhibited enhanced hydrophilicity and porosity, without sacrificing mechanical strength. As a result, it showed high pure water permeability and low structural parameter values of 4.12 L m−2 h−1 bar−1 and 221 µm, respectively, significantly better compared to commercial FO membrane. Layer-by-layer deposition of polyelectrolyte is therefore a useful and practical modification method for fabrication of high performance nanofiber-supported TFC membrane.

scholarly journals Modification of Nanofiber Support Layer for Thin Film Composite Forward Osmosis Membranes via Layer-By-Layer Polyelectrolyte Deposition

2018 ◽  
Author(s):  
Ralph Rolly Gonzales ◽  
Myoung Jun Park ◽  
Leonard Tijing ◽  
Dong Suk Han ◽  
Sherub Phuntsho ◽  
...  
Keyword(s):  
Thin Film ◽  
High Performance ◽  
Forward Osmosis ◽  
Composite Membranes ◽  
Structural Parameter ◽  
Layer By Layer ◽  
Film Composite ◽  
Thin Film Composite ◽  
Layer Deposition ◽  
Tfc Membrane

Electrospun nanofiber-supported thin film composite membranes are among the most promising membranes for seawater desalination via forward osmosis. In this study, a high-performance electrospun polyvinylidenefluoride (PVDF) nanofiber-supported TFC membrane was successfully fabricated after molecular layer-by-layer polyelectrolyte deposition. Negatively-charged electrospun polyacrylic acid (PAA) nanofibers were deposited on electrospun PVDF nanofibers to form a support layer consisted of PVDF and PAA nanofibers. This resulted to a more hydrophilic support compared to the plain PVDF nanofiber support. The PVDF-PAA nanofiber support then underwent a layer-by-layer deposition of polyethylenimine (PEI) and PAA to form a polyelectrolyte layer on the nanofiber surface prior to interfacial polymerization, which forms the selective polyamide layer of TFC membranes. The resultant PVDF-LbL TFC membrane exhibited enhanced hydrophilicity and porosity, without sacrificing mechanical strength. As a result, it showed high pure water permeability and low structural parameter values of 4.12 Lm−2h−1bar−1 and 221 µm, respectively, significantly better compared to commercial FO membrane. Layer-by-layer deposition of polyelectrolyte is therefore a useful and practical modification method for fabrication of high performance nanofiber-supported TFC membrane.

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