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A kind of cofs composite nanofiltration membrane and preparation method thereof

A composite nanofiltration membrane and nanofiltration technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problem that it is difficult to achieve effective separation of anionic dye-water mixtures

Active Publication Date: 2021-08-20
HEBEI UNIV OF ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, such membrane materials are generally suitable for the separation of cationic dye-water mixtures, and it is difficult to achieve effective separation of anionic dye-water mixtures.

Method used

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  • A kind of cofs composite nanofiltration membrane and preparation method thereof
  • A kind of cofs composite nanofiltration membrane and preparation method thereof
  • A kind of cofs composite nanofiltration membrane and preparation method thereof

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Embodiment Construction

[0036] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0037] All terms (including technical terms or scientific terms) used in the present disclosure have the same meaning as understood by one of ordinary skill in the art to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in, for example, commonly used dictionaries should be interpreted to have meanings consistent with their meanings in the context of the relevant art, and should not be interpreted in idealized or extremely formalized meanings, unless explicitly so stated herein d...

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Abstract

The invention discloses a COFs composite nanofiltration membrane. The COFs composite nanofiltration membrane includes a PBI ultrafiltration layer and a COFs nanofiltration layer. The PBI ultrafiltration layer is obtained by coating polybenzimidazole on a non-woven fabric As a result, the COFs nanofiltration layer is formed on the PBI ultrafiltration layer through interfacial polymerization. The COFs composite nanofiltration membrane of the invention has good pressure resistance, solvent resistance and high flux. The invention also provides a preparation method of the COFs composite nanofiltration membrane.

Description

technical field [0001] The invention belongs to the field of membrane technology, and relates to a composite nanofiltration membrane, in particular to a COFs composite nanofiltration membrane and a preparation method thereof. Background technique [0002] At present, the dye / water separation technology has important applications in the fields of scientific research, environmental protection, and social life. Due to the advantages of high efficiency, high throughput, continuous separation operation and low cost, membrane materials are applied to the separation of various dye-water mixtures. Among them, covalent organic frameworks (COFs) with small pore size are generally selected in small molecular weight dye-water mixtures. [0003] In the research on the preparation of COFs nanofiltration membrane materials, the mixed matrix COFs nanofiltration membrane materials first appeared. For example, the literature (Journal of Membrane Science, 2017, 523, 273) introduced SNW-1 int...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/62B01D69/12B01D61/02B01D67/00
Inventor 吕志伟
Owner HEBEI UNIV OF ENG
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