Thin-film nanocomposite membrane doped with carboxylated covalent organic frameworks for efficient forward osmosis desalination

Xu, Lei; Yang, Tingting; Li, Mingdi; Chang, Jiaqi; Xu, Jia

doi:10.1016/j.memsci.2020.118111

Cited by 77 publications

(28 citation statements)

References 47 publications

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“…Nevertheless, a major challenge that impedes FO technology application is the shortage of FO membranes with high separating property [ 13 ]. Among all kinds of FO membranes, thin film composite (TFC) membranes containing polyamide (PA) active layers on the support layer is regarded as the state-of-art FO membrane, due to that TFC membranes still have desirable separation ability over a wide range of operating temperature and pH and can independently optimize the support and selective layers [ 14 , 15 ]. However, the relative low water permeability, material fouling, harsh internal concentration polarization (ICP) and undesirable reverse solute flux of TFC membranes restricted the applications of the TFC FO membrane [ 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

Novel Thin Film Nanocomposite Forward Osmosis Membranes Prepared by Organic Phase Controlled Interfacial Polymerization with Functional Multi-Walled Carbon Nanotubes

Zhang

Zheng

et al. 2021

Membranes

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Novel high-quality thin film nanocomposite (TFN) membranes for enhanced forward osmosis (FO) were first synthesized through organic phase controlled interfacial polymerization by utilizing functional multi-walled carbon nanotubes (MWCNTs). As 3-aminopropyltriethoxysilane (APTES) grafted MWCNTs via an amidation reaction significantly promoted the dispersion in organic solution, MWCNTs-APTES with better compatibility effectively restricted the penetration of trimesoyl chloride (TMC), thus adjusting the morphology and characters of TFN membranes. Various techniques such as Fourier transform infrared spectra (FTIR), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM), sessile droplet analysis and FO experiments and reverse osmosis (RO) operation were taken to characterize and evaluate the performance of nanocomposites and membranes. The prepared TFN FO membranes exhibited good hydrophilicity and separation efficiency, in which water flux was about twice those of thin film composite (TFC) membranes without MWCNTs-APTES in both AL-DS and AL-FS modes. Compared with the original TFC membrane, the membrane structural parameter of the novel TFN FO membrane sharply was cut down to 60.7%. Based on the large number of low mass-transfer resistance channels provided by functional nanocomposites, the progresses may provide a facile approach to fabricate novel TFN FO membranes with advanced selectivity and permeability.

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Section: Introductionmentioning

confidence: 99%

Novel Thin Film Nanocomposite Forward Osmosis Membranes Prepared by Organic Phase Controlled Interfacial Polymerization with Functional Multi-Walled Carbon Nanotubes

Zhang

Zheng

et al. 2021

Membranes

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“…Again, the incorporation of -COOH functional groups into the COF was demonstrated for the improved flux of water (64.2 L m -2 h -1 MPa -) due to the surface hydrophilicity of the membrane. 146 Recently, bilayer solvent interfacial synthesis of a hydrazine-linked βketoenamine COF was deposited on the surface of Poly(ethylene imine) modified polysulfone. 147 In the bi-phase system, the hydrazine and PTSA were dissolved in water, and 1, 3, 5-triformyl phloroglucinol was dissolved in n-hexane solvent.…”

Section: Desalinationmentioning

confidence: 99%

Macroscopic covalent organic framework architectures for water remediation

Mohammed

Shetty

2021

Environ. Sci.: Water Res. Technol.

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“…Polymers that are organic in nature are more compatible with organic fillers compared to their inorganic counterparts. Xu et al incorporated carboxylated COF (COF-COOH) as a filler in the preparation of MMMs [149]. The resulting MMMs showed enhanced hydrophilicity and negative charge rendering the MMMs a 4-fold higher permeance and excellent rejection rate for NaCl.…”

Section: Mixed Matrix Membranes (Mmms)mentioning

confidence: 99%

Structural Characteristics and Environmental Applications of Covalent Organic Frameworks

et al. 2021

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Covalent organic frameworks (COFs) are emerging crystalline polymeric materials with highly ordered intrinsic and uniform pores. Their synthesis involves reticular chemistry, which offers the freedom of choosing building precursors from a large bank with distinct geometries and functionalities. The pore sizes of COFs, as well as their geometry and functionalities, can be pre-designed, giving them an immense opportunity in various fields. In this mini-review, we will focus on the use of COFs in the removal of environmentally hazardous metal ions and chemicals through adsorption and separation. The review will introduce basic aspects of COFs and their advantages over other purification materials. Various fabrication strategies of COFs will be introduced in relation to the separation field. Finally, the challenges of COFs and their future perspectives in this field will be briefly outlined.

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Thin-film nanocomposite membrane doped with carboxylated covalent organic frameworks for efficient forward osmosis desalination

Cited by 77 publications

References 47 publications

Novel Thin Film Nanocomposite Forward Osmosis Membranes Prepared by Organic Phase Controlled Interfacial Polymerization with Functional Multi-Walled Carbon Nanotubes

Novel Thin Film Nanocomposite Forward Osmosis Membranes Prepared by Organic Phase Controlled Interfacial Polymerization with Functional Multi-Walled Carbon Nanotubes

Macroscopic covalent organic framework architectures for water remediation

Structural Characteristics and Environmental Applications of Covalent Organic Frameworks

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