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Preparation method of a high-flux solvent-resistant nano-hybrid nanofiltration membrane based on natural materials

A technology of natural materials and nanofiltration membranes, applied in chemical instruments and methods, membranes, membrane technology, etc., can solve problems such as low permeation, poor compatibility, instability, etc., and achieve high permeation flux

Active Publication Date: 2021-03-30
宜兴环保产业有限公司
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Problems solved by technology

[0007] The present invention aims to solve the technical problems of poor compatibility, low penetration and instability in organic solvents in the existing preparation of nano-mixed nanofiltration membranes, thereby providing a high-flux, stable in organic solvents based on Preparation method of high-throughput solvent-resistant nano-hybrid nanofiltration membrane of natural materials

Method used

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  • Preparation method of a high-flux solvent-resistant nano-hybrid nanofiltration membrane based on natural materials
  • Preparation method of a high-flux solvent-resistant nano-hybrid nanofiltration membrane based on natural materials
  • Preparation method of a high-flux solvent-resistant nano-hybrid nanofiltration membrane based on natural materials

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preparation example Construction

[0026] A method for preparing a high-throughput solvent-resistant nano-hybrid nanofiltration membrane based on natural materials, comprising the following steps:

[0027] Weighing mass fraction is 15% ~ 22% polyimide, the mass fraction of liquid: mass fraction = solute mass in solution and solution mass * 100%, solution mass = solute mass + solvent mass, configure polymer solution, the The solvent is N-methylpyrrolidone; the polymer solution is prepared by the immersion precipitation phase inversion method, and the prepared membrane is washed with deionized water for 3 to 6 times to obtain the original polymer membrane; the configuration mass fraction is 0.5%~ 5% hexamethylenediamine alcohol solution, the diamine in the hexamethylenediamine alcohol solution is hexamethylenediamine, and the alcohol is methanol; the original polymer film is placed in the hexamethylenediamine alcohol solution and left to stand for 4 to 12 h , to obtain a cross-linked nanofiltration membrane; conf...

Embodiment 2

[0028] Embodiment 2: Referring to Embodiment 1, the solvent in the polymer solution is a kind of dimethyl sulfoxide, dimethylformamide or dimethylacetamide.

Embodiment 3

[0029] Embodiment 3: Referring to Example 1, the diamine in the hexamethylenediamine alcohol solution is hexamethylenediamine, and the alcohol is one or a combination of ethanol, isopropanol, and n-butanol.

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Abstract

The invention provides a preparation method for a high-flux solvent-resistant nanometer mixed nanofiltration membrane based on natural materials, belonging the field of preparation methods for membranes. The preparation method comprises the following steps: 1, preparing a water-free polyimide ultrafiltration base membrane; 2, preparing an alkanolamine solution of hexylenediamine and putting the membrane prepared in the previous step into the prepared alkanolamine solution of hexylenediamine for cross-linking modification; 3, preparing a buffer solution, adding dopamine, and soaking cross-linked polyimide in a buffer solution of dopamine; 4, synthesizing a metal-organic framework (Zr-MOF); 5, preparing an acyl chloride solution; and 6, preparing a glucose solution, soaking the dopamine-modified polyimide membrane in the solution of glucose and Zr-MOF so as to obtain the nanometer mixed nanofiltration membrane based on natural materials. The nanometer mixed nanofiltration membrane prepared in the invention has the advantages of great organic-solvent permeation flux, high dye retention rate, etc. The preparation method is applied to the field of preparation of nanofiltration membranes.

Description

technical field [0001] The invention relates to a method for preparing a membrane, in particular to a method for preparing a high-throughput solvent-resistant nano-mixed nanofiltration membrane. Background technique [0002] Membrane separation has outstanding advantages such as low energy consumption, low cost, high efficiency, and environmental protection, and it is closely related to strategic emerging industries supported by the state. It has become a "green" technology closely watched by academia and industry. As one of the most important membrane technologies, nanofiltration membrane has unique pore size distribution (0.5-2 nm) and surface charge characteristics, which can achieve molecular-scale separation. The organic solvent-resistant nanofiltration membrane is a recently emerging nanofiltration membrane mainly used for the purification of organic solvents. At present, industrial nanofiltration membranes are mainly prepared by interfacial polymerization, which uses...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D69/12B01D69/02B01D67/00B01D71/64
CPCB01D61/027B01D67/0002B01D69/02B01D69/125B01D71/64B01D2325/02B01D2325/30
Inventor 邵路张艳秋
Owner 宜兴环保产业有限公司
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