ZIF-67-based Composite Membranes Generated from Carboxymethyl Chitosan and Nylon Mesh for Separation Applications

Liu, Kainan; Cao, Liqin

doi:10.1007/s12221-021-0044-8

Cited by 2 publications

(5 citation statements)

References 49 publications

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“…The crystal texture of the composite membrane was characterized by XRD, and the results were shown in Figure 4B. Classic ZIF‐67 crystal surfaces were observed at 7.31° (011), 10.36° (002), 12.72° (112), 14.40° (022), and 18.02° (222), indicating the successful composition of ZIF‐67 onto the GE‐HIPE membrane 27,30 . In addition, ZIF‐67/GE‐HIPE composite membrane has a wide diffraction peak at 2 θ = 22.78°, which belongs to the characteristic peak of macromolecular GE matrix.…”

Section: Resultsmentioning

confidence: 98%

“…As the new type of nanomaterials, metal–organic frameworks (MOFs) are widely used in catalysis, 20 gas storage, 21 and separation, 22–24 which have a designable structure. Zeolitic imidazolate frameworks (ZIFs) are a kind of MOFs with good thermal and chemical stability, 25 high pore volume, 26 and hydrophobicity 27 . The simple room‐temperature preparation of ZIF makes it easy to graft or coat on various substrates to form a rough surface, which improves the hydrophobicity of the functional substrates.…”

Section: Introductionmentioning

confidence: 99%

“…Liu et al prepared ZIF‐67@PVDF mixed matrix ultrafiltration membrane, which has effective dye removal rate of orange II (AO7, 97.3%), methylene blue (98.2%), rhodamine B (90.5%) 30 . In the authors' previous work, a modified composite membrane was developed by using nylon mesh as an anchored support membrane and with a WCA of 129° 27 . Hence, ZIF‐67 as a surface modifier can enhance the emulsion separation efficiency and organic dye removal rate of the separation membrane.…”

Section: Introductionmentioning

confidence: 99%

“…Zeolitic imidazolate frameworks (ZIFs) are a kind of MOFs with good thermal and chemical stability, 25 high pore volume, 26 and hydrophobicity. 27 The simple room-temperature preparation of ZIF makes it easy to graft or coat on various substrates to form a rough surface, which improves the hydrophobicity of the functional substrates.…”

mentioning

confidence: 99%

“…30 In the authors' previous work, a modified composite membrane was developed by using nylon mesh as an anchored support membrane and with a WCA of 129 . 27 Hence, ZIF-67 as a surface modifier can enhance the emulsion separation efficiency and organic dye removal rate of the separation membrane.…”

mentioning

confidence: 99%

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Preparation and application of ZIF‐67/gelatin porous composite membrane via high internal phase emulsion

Cao

Zhang

2023

Polymers for Advanced Techs

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The high internal phase emulsion (HIPE) template method is widely used to prepare porous functional materials because of its designable emulsion components and adjustable porosity. Herein, amphiphilic gelatin (GE) as the sole emulsion stabilizer, and no additional emulsifiers were added to prepare a stable GE‐HIPE membrane and its zeolitic imidazolate framework‐67 (ZIF‐67) hybrid composite membrane. The ZIF‐67/GE‐HIPE composite membrane has good lipophilicity by constructing dual micro‐nano structures by HIPE template and in situ growth of ZIF‐67. When ZIF‐67 was grown in situ, the water contact angle (CA) increased from 58.1 ± 2° for the GE membrane to 121 ± 1.9° for ZIF‐67/GE‐HIPE composite membranes. Besides, the minimum CA of organic solvent is 4.5 ± 0.7° (n‐hexane). The ZIF‐67/GE‐HIPE composite membranes exhibit good O/W emulsion separation properties and adsorption removal ability of organic pollutants. After 10 times of recycling emulsion separation, the emulsion separation capacity of the membrane was still greater than 99.4%. The lipophilic dye removal rate of the ZIF‐67/GE‐HIPE composite membrane was 2.37 times higher than that of GE‐HIPE, and the adsorption process conforms to the pseudo‐second‐order model. Thus, this work provides a strategy for the preparation of GE‐based hydrophobic modified membrane and also presents a typical treatment of adsorption‐separation of lipophilic substances.

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Section: Resultsmentioning

confidence: 98%