In-situ covalently bonded supramolecular-based protective layer for improving chlorine resistance of thin-film composite nanofiltration membranes

Zhu, Xuewu; Cheng, Xiaoxiang; Xing, Jiajian; Wang, Tianyu; Xu, Daliang; Bai, Langming; Luo, Xinsheng; Wang, Weiqiang; Li, Guibai; Liang, Heng

doi:10.1016/j.desal.2019.114197

Cited by 58 publications

(19 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The C 1s and N 1s high-resolution spectra of A0 and A2 are shown in Figure c–f. C 1s component peaks at 288.5, 285.2, and 284.48 eV were ascribed to N–CO, C–N, and CC/C–C (Figure c,e) . The N 1s component peaks at 399.99 and 399.52 eV were attributed to C–N and N–CO (Figure d,f) .…”

Section: Resultsmentioning

confidence: 94%

See 1 more Smart Citation

Polyhydroxy Group Functionalized Zwitterion for a Polyamide Nanofiltration Membrane with High Water Permeation and Antifouling Performance

Rao

Liang³

et al. 2020

ACS Appl. Polym. Mater.

View full text Add to dashboard Cite

Nanofiltration (NF) membranes have attracted significant attention owing to their widespread applications in water treatment and seawater desalination. However, challenges still remain in improving their antifouling performance and water permeation. Here, a sulfobetaine-based zwitterion with polyhydroxy groups was designed and synthesized successfully. Then, the NF membranes were modified by the reaction of the hydroxyl group of the zwitterion and the acid chloride group on the surface of the initial NF membrane. Hence, the hydrophilicity of the NF membrane was significantly enhanced and resulted in the high promotion of nanofiltration performance and antifouling property. Besides, the flux of the modified NF membrane (A2) reached 9.28 L m–2 h–1 bar–1, which was 2.2 times higher than the flux of pristine NF membrane (A0). Nevertheless, the rejection showed a slight decrease. Also, the modified NF membrane possessed excellent fouling resistance to protein; the flux recovery ratio was nearly 98% after the membrane was treated with bovine serum albumin for 2.5 cycles. The excellent water flux and fouling resistance of this NF membrane advanced its application in wastewater treatment.

show abstract

Section: Resultsmentioning

confidence: 94%

“…C 1s component peaks at 288.5, 285.2, and 284.48 eV were ascribed to N−CO, C−N, and CC/C−C (Figure 3c,e). 38 The N 1s component peaks at 399.99 and 399.52 eV were attributed to C−N and N−CO (Figure 3d,f). 39 These results demonstrated that THAES was definitely grafted onto the surface of nanofiltration membranes.…”

Section: Resultsmentioning

confidence: 98%

Polyhydroxy Group Functionalized Zwitterion for a Polyamide Nanofiltration Membrane with High Water Permeation and Antifouling Performance

Rao

Liang³

et al. 2020

ACS Appl. Polym. Mater.

View full text Add to dashboard Cite

show abstract

“…TFC 0 and TFC n O both showed higher removal of salts containing divalent ions (Na 2 SO 4 , MgSO 4 , and CaCl 2 ) than monovalent salt. The removal of divalent salt by the TFC membrane was ascribed to the synergistic effect of size repulsion and Donnan exclusion . The MWCOs of the TFC n O membrane were lower than that of the TFC 0 membrane, whereas a stronger negative charge of the membrane surface was obtained for the TFC 0 membrane (Figure h).…”

Section: Resultsmentioning

confidence: 99%

“…The removal of divalent salt by the TFC membrane was ascribed to the synergistic effect of size repulsion and Donnan exclusion. 48 The MWCOs of the TFC n O membrane were lower than that of the TFC 0 membrane, whereas a stronger negative charge of the membrane surface was obtained for the TFC 0 membrane (Figure 4h). As a result, the investigated TFC membranes showed an approximate rejection of divalent salt without statistical significance based on statistical analysis.…”

Section: ■ Materials and Methodsmentioning

confidence: 95%

MXene Nanosheet Templated Nanofiltration Membranes toward Ultrahigh Water Transport

Zhu

Luo

et al. 2020

Environ. Sci. Technol.

Self Cite

105

View full text Add to dashboard Cite

The demand for thin-film composite (TFC) nanofiltration membranes with superior permeance and high rejection is gradually increasing for seawater desalination and brackish water softening. However, improving the membrane permeance remains a great challenge due to the formation of excrescent polyamide in the substrate pores and thick polyamide film. Herein, we fabricated a highperformance TFC nanofiltration membrane via a classical interfacial polymerization reaction on a two-dimensional lamellar layer of transition-metal carbides (MXene). The MXene layer promoted the absorption of the reactive monomer, and higher amine monomer concentration facilitated the self-sealing and self-termination of interfacial polymerization to generate a thinner outer polyamide film from 68 to 20 nm. The almost nonporous lamellar interface inhibited the formation of inner polyamide in the substrate pores. In addition, the MXene lamellar layer could be eliminated by mild oxidation after interfacial polymerization to avoid imparted additional hydraulic resistance. The resulting TFC membrane conferred a high rejection above 96% for Na 2 SO 4 and excellent permeance of 45.7 L•m −2 •h −1 •bar −1 , which was almost 4.5 times higher than that of the control membrane (10.2 L•m −2 •h −1 •bar −1 ). This research provides a feasible strategy for fabricating a high-performance nanofiltration membrane using two-dimensional nanosheets as a templated interface.

show abstract

“…The chlorination test results indicated that the prepared membranes display superior chlorine resistance to the control membranes. [ 114 ]…”

Section: Supramolecular Biomimetic Membranesmentioning

confidence: 99%

The Journey of Water Remediation through Biomimetic Strategies: A Mechanistic Insight

Gupta

Padmavathy

Bose

2021

Advanced Sustainable Systems

View full text Add to dashboard Cite

Nature‐driven designs for water crisis have shown much interest in energy‐efficient water treatment. This review discusses four different bioinspired systems, aquaporin membranes, mussel‐inspired amine‐based membranes, supramolecular architectures, and cactus/mangrove desalination. The authors have also delineated their contributions and mechanisms toward forming water pathways for effective desalination. The discussion is mainly channelized toward constructing generic approaches based on membranes with diverse shapes and dimensions, including hierarchically structured membranes. The separation properties of these bioinspired systems stem from their chemical and physical structures imparting selectivity in the separation of ions, pollutants, etc. Further, this review covers the practical methodologies for next‐generation energy‐efficient membranes and outlines the perspectives regarding the upcoming developments in water technology.

show abstract

In-situ covalently bonded supramolecular-based protective layer for improving chlorine resistance of thin-film composite nanofiltration membranes

Cited by 58 publications

References 45 publications

Polyhydroxy Group Functionalized Zwitterion for a Polyamide Nanofiltration Membrane with High Water Permeation and Antifouling Performance

Polyhydroxy Group Functionalized Zwitterion for a Polyamide Nanofiltration Membrane with High Water Permeation and Antifouling Performance

MXene Nanosheet Templated Nanofiltration Membranes toward Ultrahigh Water Transport

The Journey of Water Remediation through Biomimetic Strategies: A Mechanistic Insight

Contact Info

Product

Resources

About