Ultrathin nanofiltration membrane with polydopamine-covalent organic framework interlayer for enhanced permeability and structural stability

Wu, Mengyuan; Yuan, Jinqiu; Wu, Hong; Su, Yanlei; Yang, Hao; You, Xinda; Zhang, Runnan; He, Xueyi; Khan, Niaz Ali; Kasher, Roni; Jiang, Zhongyi

doi:10.1016/j.memsci.2019.01.040

Cited by 275 publications

(103 citation statements)

References 31 publications

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“…Other COFpolymer-based thin film composites had also been established, where COFs and polydopamine were introduced to improve the hydrophilicity, structural stability, and permeance of PA membranes. [248,249] Zwitterions with equivalent cations and anions in the same monomer unit showed a promising antifouling property for membranes, benefiting from the strong hydration layer on the surface. A novel zwitterionic cage-like PAF (Z-PAF-C) was synthesized by copolymerization of piperazine and cyanuric chloride, followed by 1,3-propane sultone decoration.…”

Section: Desalinationmentioning

confidence: 99%

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Emerging Functional Porous Polymeric and Carbonaceous Materials for Environmental Treatment and Energy Storage

Zheng

Lin

Zhang

et al. 2019

Adv Funct Materials

206

118

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The demand for practical and cost-effective environmental treatment and energy storage materials is exploding. Porous polymeric and carbonaceous materials have attracted tremendous interest on account of their welldeveloped porosity and tunable surface chemistry. Functionalization of pore structures further enhances their properties for environmental treatment and energy storage. Herein, the procedures for functionalization of porous structures are introduced, including predesign and postsynthetic strategies. Subsequently, the important advancements of emerging porous polymers for environmental treatment in sorption (e.g., organic micropollutant adsorption, heavy metal ion removal, radionuclide extraction, and oil absorption) and membrane separation (e.g., aqueous micropollutant separation, organic solvent nanofiltration, desalination and pervaporation), as well as for energy storage ranging from the electrodes and separators of batteries to supercapacitor electrodes are highlighted. Moreover, given the combined merits of high intrinsic conductivity, porosity, and physicochemical stability, novel polymer-based porous carbons for energy storage are also highlighted. Key functionalization chemistry for each application is discussed and an in-depth understanding of the structure-property relationships of these functional porous materials is provided. Finally, the challenges and perspectives of emerging functional porous polymeric and carbonaceous materials for environmental treatment and energy storage are proposed.

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Section: Desalinationmentioning

confidence: 99%

“…The above new robust membranes provided new candidates for water purification. Other COF‐polymer‐based thin film composites had also been established, where COFs and polydopamine were introduced to improve the hydrophilicity, structural stability, and permeance of PA membranes …”

Section: Environmental Treatmentmentioning

confidence: 99%

Emerging Functional Porous Polymeric and Carbonaceous Materials for Environmental Treatment and Energy Storage

Zheng

Lin

Zhang

et al. 2019

Adv Funct Materials

206

118

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“…Upper-bound line represents the level of permeability and selectivity achieved by the currently prepared membranes. In order to illustrate the superiority of the asymmetric polyamide nanofilm between permeability and selectivity, we calculated related permeability/selectivity data of different types of polyamide membranes as currently reported in the literature, such as commercial polyamide membrane (Commercial membrane) 44 , crumpled polyamide membrane (IP with crumpled structure) 16,28,32 , polyamide membrane prepared by interlayer (Interlayer-IP) 20,21,26,[45][46][47][48] , traditional IP membrane (IP) 12,28,[49][50][51][52] , and mixed matrix polyamide membranes (MMMs) 14,[53][54][55][56][57][58][59][60] , as shown in Fig. 6a, b.…”

Section: Resultsmentioning

confidence: 99%

Asymmetric polyamide nanofilms with highly ordered nanovoids for water purification

et al. 2020

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Tailor-made structure and morphology are critical to the highly permeable and selective polyamide membranes used for water purification. Here we report an asymmetric polyamide nanofilm having a two-layer structure, in which the lower is a spherical polyamide dendrimer porous layer, and the upper is a polyamide dense layer with highly ordered nanovoids structure. The dendrimer porous layer was covalently assembled in situ on the surface of the polysulfone (PSF) support by a diazotization-coupling reaction, and then the asymmetric polyamide nanofilm with highly ordered hollow nanostrips structure was formed by interfacial polymerization (IP) thereon. Tuning the number of the spherical dendrimer porous layers and IP time enabled control of the nanostrips morphology in the polyamide nanofilm. The asymmetric polyamide membrane exhibits a water flux of 3.7−4.3 times that of the traditional monolayer polyamide membrane, showing an improved divalent salt rejection rate (more than 99%), which thus surpasses the upper bound line of the permeability−selectivity performance of the existing various structural polyamide membranes. We estimate that this work might inspire the preparation of highly permeable and selective reverse osmosis (RO), organic solvent nanofiltration (OSNF) and pervaporation (PV) membranes.

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“…Spatial-temporal distribution of aqueous monomer governs the IP process and reflects as monomer concentration and monomer diffusion rate, respectively ( Freger, 2003 ). Currently, most efforts for monomer regulation are focused on short-range H-bond interactions ( Guan et al., 2020 ; Karan et al., 2015 ; Li et al., 2020 ; Tan et al., 2018 ; Wang et al., 2017 ; Wu et al., 2019 ; You et al., 2017 ; Yuan et al., 2019 ). For temporal regulation, retarded amine monomer diffusion across the interface and slowed down membrane formation has been realized by introducing H-bond generating materials into the aqueous phase to closely interact with the amine monomer ( Li et al., 2020 ; Tan et al., 2018 ).…”

Section: Introductionmentioning

confidence: 99%

“…This dense primary layer could hinder amine monomer diffusion and inhibit further membrane growth, namely the self-sealing process. By depositing H-bond generating materials on substrate surface to adsorb aqueous monomers and increase monomer concentration, nearly 10-nm-thick polyamide membranes have been achieved by promoted self-sealing ( Karan et al., 2015 ; Wu et al., 2019 ; Yuan et al., 2019 ). Nonetheless, the concentration effect based on H-bond interaction is spatially restricted in terms of action range (ca.…”

Section: Introductionmentioning

confidence: 99%

Electrostatic-modulated interfacial polymerization toward ultra-permselective nanofiltration membranes

You

Xiao

et al. 2021

iScience

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Summary Interfacial polymerization (IP) is a platform technology for ultrathin membranes. However, most efforts in regulating the IP process have been focused on short-range H-bond interaction, often leading to low-permselective membranes. Herein, we report an electrostatic-modulated interfacial polymerization (eIP) via supercharged phosphate-rich substrates toward ultra-permselective polyamide membranes. Phytate, a natural strongly charged organophosphate, confers high-density long-range electrostatic attraction to aqueous monomers and affords tunable charge density by flexible metal-organophosphate coordination. The electrostatic attraction spatially enriches amine monomers and temporally decelerates their diffusion into organic phase to be polymerized with acyl chloride monomers, triggering membrane sealing and inhibiting membrane growth, thus generating polyamide membranes with reduced thickness and enhanced cross-linking. The optimized nearly 10-nm-thick and highly cross-linked polyamide membrane displays superior water permeance and ionic selectivity. This eIP approach is applicable to the majority of conventional IP processes and can be extended to fabricate a variety of advanced membranes from polymers, supermolecules, and organic framework materials.

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Ultrathin nanofiltration membrane with polydopamine-covalent organic framework interlayer for enhanced permeability and structural stability

Cited by 275 publications

References 31 publications

Emerging Functional Porous Polymeric and Carbonaceous Materials for Environmental Treatment and Energy Storage

Emerging Functional Porous Polymeric and Carbonaceous Materials for Environmental Treatment and Energy Storage

Asymmetric polyamide nanofilms with highly ordered nanovoids for water purification

Electrostatic-modulated interfacial polymerization toward ultra-permselective nanofiltration membranes

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