Thin film composite reverse osmosis membranes prepared via layered interfacial polymerization

Choi, Wansuk; Jeon, Sungkwon; Kwon, Sung-Kyu; Park, Hosik; Park, You In; Nam, Soohyun; Lee, Pyung Soo; Lee, Jong Suk; Choi, Jong-Moon; Hong, Seungkwan; Chan, Edwin P.; Lee, Jung Hyun

doi:10.1016/j.memsci.2016.12.066

Cited by 138 publications

(60 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Nanofiltration is a very complex process, depending on the surface micro-hydrodynamic events occurring on the surface and in the nanopores of the membrane. NF membranes have pores with a size smaller than 1 nm and a molecular weight cut-off of less than 300 to 500 Da [37]. They are capable of removing material with 0.01 to 0.001 μms in size.…”

Section: Additional Informationmentioning

confidence: 99%

Nanofiltration and microfiltration for the removal of chromium, total dissolved solids, and sulfate from water

Zolfaghari

Kargar

2019

MethodsX

View full text Add to dashboard Cite

show abstract

Section: Additional Informationmentioning

confidence: 99%

Nanofiltration and microfiltration for the removal of chromium, total dissolved solids, and sulfate from water

Zolfaghari

Kargar

2019

MethodsX

View full text Add to dashboard Cite

show abstract

“…This observation was related to larger pores on the MCE substrate, in which MPD can rapidly diffuse and react with TMC to form large PA oligomers and an initial PA layer [20,42]. The denser surface of MCE/CNTs support layer (Figure 3a) favored the more uniform leaf-like structure of the PA layer, attributing that the SWCNTs interlayer can make the MPD diffusion slow and uniform from aqueous solution to organic solution and thus control the interfacial polymerization reaction [43]. Cross-sectional SEM images ( Figure S4) indicated a continuous PA layer formed on the support layer surface for all the TFC membranes.…”

Section: Tfc Fo Membrane Characterizationmentioning

confidence: 99%

Thin Film Composite Forward Osmosis Membrane with Single-Walled Carbon Nanotubes Interlayer for Alleviating Internal Concentration Polarization

Tang

et al. 2020

Polymers

View full text Add to dashboard Cite

This study reported a series of thin film composite (TFC) membranes with single-walled nanotubes (SWCNTs) interlayers for the forward osmosis (FO) application. Pure SWCNTs with ultrahigh length-to-diameter ratio and without any functional group were applied to form an interconnect network interlayer via strong π-π interactions. Compared to the TFC membrane without SWCNTs interlayer, our TFC membrane with optimal SWCNTs interlayer exhibited more than three times the water permeability (A) of 3.3 L m−2h−1bar−1 in RO mode with 500 mg L−1 NaCl as feed solution and nearly three-fold higher FO water flux of 62.8 L m−2 h−1 in FO mode with the deionized water as feed solution and 1 M NaCl as draw solution. Meanwhile, the TFC membrane with SWCNTs interlayer exhibited significantly reduced membrane structure parameters (S) to immensely mitigate the effect of internal concentration polarization (ICP) in support layer with micro-sized pores in favor of higher water flux. It showed that the pure SWCNTs interlayer could be an effective strategy to apply in FO membranes.

show abstract

“…A limited number of studies reported the development of an effective method for synthesizing TFC membranes with a hydrophilic substrate. In addition to the method based on the TMC precoating by Alsvik et al [ 13 ], Choi et al [ 27 ] successfully fabricated a nanoscale-controlled PA layer with a typical thickness ~15 nm by depositing the complementary monomers (i.e., MPD and TMC) alternatingly on a polyelectrolyte-modified hydrophilic polyacrylonitrile (PAN) substrate; Park et al [ 28 ] employed toluene/xylene as the solvent for the organic phase, and synthesized TFC membranes with higher performance for reverse osmosis (RO) using a hydrophilic PAN membrane as the substrate; the method developed by Park et al [ 28 ] was further optimized by Kwon et al [ 29 ], and the synthesized TFC membranes were examined in a forward osmosis (FO) process. However, most of these studies ignored the effects of the substrate hydrophilicity on the formation of the PA layer.…”

Section: Introductionmentioning

confidence: 99%

Effects of the Substrate on Interfacial Polymerization: Tuning the Hydrophobicity via Polyelectrolyte Deposition

Liu

et al. 2020

Membranes

View full text Add to dashboard Cite

Interfacial polymerization (IP) has been the key method for the fabrication of the thin film composite (TFC) membranes that are extensively employed in reverse osmosis (RO) and forward osmosis (FO). However, the role of the substrate surface hydrophilicity in the formation of the IP-film remains a controversial issue to be further addressed. This study characterized the IP films formed on a series of polyacrylonitrile (PAN) substrates whose hydrophilicities (from ~38 to ~93 degrees) were varied via different approaches, including the alkaline treatment and the deposition of various polycations. It was revealed that delamination could occur when the IP film was formed on a relatively hydrophilic surface; the integrity of the TFC membranes was substantially improved, owing to the modification of the polyelectrolyte deposition. On the other hand, the characterization indicated that the TFC membrane could have an enhanced efficiency (with a factor of ~2) when the substrate was relatively hydrophilic. It was established that the polyelectrolyte deposition could be exploited to effectively tune the substrate surface hydrophobicity, thereby providing more degrees of freedom for the optimization of the TFC membranes fabrication.

show abstract

Thin film composite reverse osmosis membranes prepared via layered interfacial polymerization

Cited by 138 publications

References 39 publications

Nanofiltration and microfiltration for the removal of chromium, total dissolved solids, and sulfate from water

Nanofiltration and microfiltration for the removal of chromium, total dissolved solids, and sulfate from water

Thin Film Composite Forward Osmosis Membrane with Single-Walled Carbon Nanotubes Interlayer for Alleviating Internal Concentration Polarization

Effects of the Substrate on Interfacial Polymerization: Tuning the Hydrophobicity via Polyelectrolyte Deposition

Contact Info

Product

Resources

About