Robust Aqua Material: A Pressure‐Resistant Self‐Assembled Membrane for Water Purification

Cohen, Erez; Weissman, Haim; Shimoni, Eyal; Kaplan‐Ashiri, Ifat; Werle, Kai; Wohlleben, Wendel; Rybtchinski, Boris

doi:10.1002/anie.201610288

Cited by 28 publications

(17 citation statements)

References 40 publications

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“…The immediate need for remediation of toxic metals has spurred research interest in the field of materials design . Preliminary methods like ion‐exchange resins were explored but were found to be expensive and ineffective .…”

mentioning

confidence: 99%

Efficient Mercury Capture Using Functionalized Porous Organic Polymer

et al. 2017

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The primary challenge in materials design and synthesis is achieving the balance between performance and economy for real-world application. This issue is addressed by creating a thiol functionalized porous organic polymer (POP) using simple free radical polymerization techniques to prepare a cost-effective material with a high density of chelating sites designed for mercury capture and therefore environmental remediation. The resulting POP is able to remove aqueous and airborne mercury with uptake capacities of 1216 and 630 mg g , respectively. The material demonstrates rapid kinetics, capable of dropping the mercury concentration from 5 ppm to 1 ppb, lower than the US Environmental Protection Agency's drinking water limit (2 ppb), within 10 min. Furthermore, the material has the added benefits of recyclability, stability in a broad pH range, and selectivity for toxic metals. These results are attributed to the material's physical properties, which include hierarchical porosity, a high density of chelating sites, and the material's robustness, which improve the thiol availability to bind with mercury as determined by X-ray photoelectron spectroscopy and X-ray absorption fine structure studies. The work provides promising results for POPs as an economical material for multiple environmental remediation applications.

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confidence: 99%

Efficient Mercury Capture Using Functionalized Porous Organic Polymer

et al. 2017

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“…Supramolecular chemistry can be harnessed for the development of tailor‐made membranes. It has already been employed in membrane production for several decades, either to serve as pore templates,8,9 as re‐useable functional coating on membranes,10,11 or as base material for the membranes 12,13. Supramolecular chemistry is based on chemical motifs which interact in a directed fashion with each other though non‐covalent interactions 14,15.…”

Section: Membrane Properties Of Different Supramolecular Polymer Blendsmentioning

confidence: 99%

Development of Poor Cell Adhesive Immersion Precipitation Membranes Based on Supramolecular Bis‐Urea Polymers

Gaal

Sprang

Borneman

et al. 2019

Macromolecular Bioscience

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A variety of biomedical applications requires tailored membranes; fabrication through a mix‐and‐match approach is simple and desired. Polymers based on supramolecular bis‐urea (BU) moieties are capable of modular integration through directed non‐covalent stacking. Here, it is proposed that non‐cell adhesive properties can be introduced in polycaprolactone‐BU‐based membranes by the addition of poly(ethylene glycol) (PEG)‐BU during immersion precipitation membrane fabrication, while unmodified PEG is not retained in the membrane. PEG‐BU addition results in denser membranes with a similar pore size compared to pristine membranes, while PEG addition induces defect formation. Infrared spectroscopy and surface hydrophobicity measurements indicate that PEG‐BU is retained during membrane processing. Additionally, PEG‐BU incorporation successfully leads to poor cell adhesive surfaces. No evidence is observed to indicate PEG retention. The results obtained indicate that the BU system enables intimate mixing of BU‐modified polymers after processing. Collectively, the results provide the first steps toward BU‐based immersion precipitated supramolecular membranes for biomedical applications.

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“…Therefore, polymer materials have been used in the preparation of separation membranes with a great advantage in processability. Organic membranes can be obtained by spin coating, self‐assembly, interface crosslinking and other preparation technologies 9–12 . Zhang et al 13 .…”

Section: Introductionmentioning

confidence: 99%

Highly efficient separation membrane based on cellulose acetate/chitosan fibrous composite substrate with activated carbon functional adsorption layer

Zhao

Huang

et al. 2020

J of Chemical Tech & Biotech

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BACKGROUND For improving the permeability and selectivity of adsorption separation membranes, membrane materials, structural morphology and separation technology must continue to be investigated. Development of a membrane that is environmentally friendly, cost‐effective and with high filter precision is an important direction in current research. RESULTS The air pressure spraying method was used to prepare an activated carbon (AC)–cellulose acetate/chitosan (CA/CS) composite membrane. The CA/CS fiber composite membrane was prepared as substrate layer, and AC was loaded on the surface of the CA/CS composite membrane as a functional adsorption layer. When the spraying pressure was 0.01 MPa and the mass ratio of AC/CS was 2:1, a composite membrane with even and compact morphology could be obtained. Both the compact AC functional layer and complete CA/CS substrate layer endowed the AC–CA/CS composite membrane with an excellent water filtration property. At low feeding pressure, the permeate flux and rejection rate of bisphenol A (BPA) could reach 9.27 × 103 L m−2 h−1 and 98.31%, respectively. Meanwhile, the adsorption capacities of the membrane were investigated. It tended to equilibrate quickly in 2 min for dyes and BPA. The equilibrium adsorption capacities of the membrane for acid blue, acid yellow and BPA were 175.80, 164.0815 and 79.58 mg g−1, respectively. The adsorption process conformed to pseudo‐second‐order kinetics and the Langmuir monolayer adsorption model. CONCLUSIONS This work could provide a practical and effective feasibility for membrane separation technology. © 2020 Society of Chemical Industry (SCI)

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Robust Aqua Material: A Pressure‐Resistant Self‐Assembled Membrane for Water Purification

Cited by 28 publications

References 40 publications

Efficient Mercury Capture Using Functionalized Porous Organic Polymer

Efficient Mercury Capture Using Functionalized Porous Organic Polymer

Development of Poor Cell Adhesive Immersion Precipitation Membranes Based on Supramolecular Bis‐Urea Polymers

Highly efficient separation membrane based on cellulose acetate/chitosan fibrous composite substrate with activated carbon functional adsorption layer

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