MOF-modified antipollution composite reverse osmosis membrane and preparation method thereof

A reverse osmosis membrane, anti-pollution technology, used in reverse osmosis, water pollutants, semi-permeable membrane separation, etc. The effect of enhancing and reducing penetration resistance

Inactive Publication Date: 2019-11-15
恩泰环保科技(常州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the defect that the reverse osmosis membrane in the prior art has no obvious effect on the pollution of organic ma

Method used

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  • MOF-modified antipollution composite reverse osmosis membrane and preparation method thereof
  • MOF-modified antipollution composite reverse osmosis membrane and preparation method thereof
  • MOF-modified antipollution composite reverse osmosis membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Preparation of copper-1,4-benzenedicarboxylate metal-organic framework materials

[0033] Dimethylformamide and acetonitrile were mixed at room temperature at a volume ratio of 2:1 as the first mixed solvent, and 1,4-benzenedicarboxylic acid was dissolved in the first mixed solvent at a concentration of 10 mg / mL, and stirred at room temperature for 30 minutes to obtain a homogeneous 1,4-benzenedicarboxylic acid solution.

[0034] Mix dimethylformamide and acetonitrile at room temperature in a volume ratio of 1:1 as the second mixed solvent; mix dimethylformamide and acetonitrile at room temperature in a volume ratio of 1:2 as the third mixed solvent. Copper nitrate trihydrate Cu(NO 3 ) 2 ·3H 2 O was dissolved in the third mixed solvent at a concentration of 10 mg / mL, and stirred at room temperature for 30 minutes to obtain a uniform copper nitrate solution. Slowly add 1,4-benzenedicarboxylic acid solution, the second mixed solvent, and copper nitrate solution in...

Embodiment 2

[0041] Compared with Example 1, the only difference is that the mass fraction of copper-1,4-benzenedicarboxylate metal organic framework material in n-hexane mixed solution is replaced by 0.06wt%, and the others are the same as Example 1.

Embodiment 3

[0043] Compared with Example 1, the only difference is that the mass fraction of copper-1,4-benzenedicarboxylate metal organic framework material in n-hexane mixed solution is replaced by 0.09wt%, and the others are the same as Example 1.

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Abstract

The invention belongs to the technical field of seawater desalination, and particularly relates to an MOF-modified antipollution composite reverse osmosis membrane and a preparation method thereof. The composite reverse osmosis membrane comprises a polysulfone support layer and a desalination layer, the desalination layer is a polyamide composite membrane loaded with a copper-1,4-benzenedicarboxylate metal organic framework material, and the copper-1,4-benzenedicarboxylate metal organic framework material has a pore size of 0.52 nm. The invention also provides the preparation method of the MOF-modified antipollution composite reverse osmosis membrane. The MOF-modified antipollution composite reverse osmosis membrane prepared in the invention effectively reduces organic pollutants adsorbedto the surface of the composite reverse osmosis membrane, and copper ions on the surface of the membrane have a sterilization effect, so that the composite reverse osmosis membrane has the function ofresisting organic pollution and microbial pollution; and the water flux of the composite reverse osmosis membrane increases significantly while keeping the desalination rate unchanged.

Description

technical field [0001] The invention belongs to the technical field of seawater desalination, and in particular relates to a MOF modified anti-pollution composite reverse osmosis membrane and a preparation method thereof. Background technique [0002] Seawater desalination provides an indirect use of production to solve the water shortage problem facing the world today, and domestic water has become an important and very effective way of global freshwater supply. Seawater is converted into a direct route by reverse osmosis. Among all kinds of reverse osmosis membranes, polyamide composite reverse osmosis membranes have become the mainstream of today's reverse osmosis membranes due to their excellent separation performance and permeability. In the practical application of reverse osmosis membranes, the adsorption of organic matter and microorganisms on the membrane surface will cause the decrease of water flux, so the preparation of reverse osmosis membranes with long-term h...

Claims

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Application Information

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IPC IPC(8): B01D71/68B01D69/12B01D69/02B01D61/02B01D67/00C02F9/04
CPCB01D61/025B01D67/0002B01D69/02B01D69/12B01D71/68C02F1/441C02F1/50C02F2101/30Y02A20/131
Inventor 周子杰刘涛张曙光苗发成周兴蒙向豪
Owner 恩泰环保科技(常州)有限公司
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