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Covalent organic framework IISERP-COOH-COF1 membrane and preparation method and application

A technology of IISERP-COOH-COF1 and IISERP-COF1, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problem of low ion retention rate, achieve good application prospects and high film repeatability , The effect of excellent seawater desalination performance

Active Publication Date: 2019-05-31
EAST CHINA NORMAL UNIVERSITY
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

At present, the application of covalent organic framework membranes in nanofiltration separation is limited to the separation of dye molecules in sewage. Since the pore diameter of most covalent organic framework materials is much larger than that of most hydrated ions, the prepared covalent organic framework membranes are not suitable for sewage The ion rejection rate is not high

Method used

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  • Covalent organic framework IISERP-COOH-COF1 membrane and preparation method and application
  • Covalent organic framework IISERP-COOH-COF1 membrane and preparation method and application
  • Covalent organic framework IISERP-COOH-COF1 membrane and preparation method and application

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Embodiment 1

[0048] Example 1 Covalent Organic Framework Film IISERP-COOH-COF1

[0049] Step 1: APTES functionalized porous tubular alumina support

[0050] The alumina ceramic tube adopted in the present invention has an outer diameter of 10 mm, an inner diameter of 6 mm, an inner diameter of 8 mm, a pore diameter of 0.5 μm, and a porosity of 25%.

[0051] APTES functionally modifies the porous carrier, modifying a layer of amino groups on the surface of the carrier, 3ml of APTES (3-aminopropyltriethoxysilane), 60ml of toluene, put the alumina ceramic tube into the prepared above Solution, hydrothermal reaction at 110°C for 90 minutes.

[0052] Step 2: Preparation of covalent organic framework seed layer by in situ seeding method

[0053] The IISERP-COF1 seed layer was prepared on the surface of APTES-modified alumina ceramic tube by in-situ growth method, and the seed layer was introduced. Specifically, 80 mg of phloroglucinol trialdehyde, 40 mg of 2,5-diaminotriazole, 10 ml of N,N-di...

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Abstract

The invention discloses a covalent organic framework IISERP-COOH-COF1 membrane preparation method and application. The preparation method includes: 1) functionally modifying an aluminum oxide ceramictube matrix by 3-aminopropyl triethoxy silane namely APTES; 2) growing an IISERP-COF1 crystal seed layer on the APTES modified ceramic tube surface; 3) performing secondary composition by means of conventional heating to obtain a uniform and compact IISERP-COF1 membrane; 4) functionalizing the IISERP-COF1 membrane by butanedioic anhydride, modifying to obtain an IISERP-COOH-COF1 membrane, and applying the prepared membrane to various ion nanofiltration desalting experiments. The covalent organic framework membrane with excellent nanofiltration performance is prepared by adoption of the simpleand efficient functionalization and modification method. By adoption of the membrane for ion desalting experiments, under conditions of the room temperature and an operating pressure of 2bar, the Na2SO4 ion retention rate is up to 96.27%, and the water flux is up to 0.55L m<-2> h<-1> bar<-1>. The membrane can be applied to sea water desalination.

Description

technical field [0001] The invention relates to the synthesis of a covalent organic framework membrane, and in particular provides a covalent organic framework IISERP-COOH-COF1 membrane with excellent nanofiltration performance, a preparation method and an application. Background technique [0002] Water is the source of life and the basic condition for the growth of all things. With the rapid growth of population, the rapid development of basic industries such as industry and agriculture, and the increasing environmental pollution, the extreme shortage of water resources has become a worldwide problem. As one of the most water-scarce countries in the world, my country's per capita water resources are only 2200m 3 , only a quarter of the world average. With the rapid development of my country's economy, the rapid growth of population, and the continuous acceleration of urbanization, various forms of water pollution, such as acidification, water eutrophication, oil pollutio...

Claims

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Application Information

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IPC IPC(8): B01D67/00B01D69/12C02F1/44C02F103/08
CPCY02A20/131
Inventor 黄爱生刘传耀姜蕴哲郭浩
Owner EAST CHINA NORMAL UNIVERSITY
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