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Preparation method of solvent-resistant modified polyaryletherketone ultrafiltration membrane

A polyaryletherketone, ultrafiltration membrane technology, applied in ultrafiltration, chemical instruments and methods, membranes, etc., can solve the problems of affecting membrane separation performance, limiting application occasions, swelling and even dissolution, and improve pure water flux. and thermal stability, the cross-linking method is simple, and the effect of improving stability

Active Publication Date: 2020-03-06
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, general polymer membrane materials are easy to be swollen or even dissolved by solvents because the interaction between molecular chains only depends on the mutual entanglement at the physical level, which affects the separation performance of the membrane and greatly limits its application.

Method used

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  • Preparation method of solvent-resistant modified polyaryletherketone ultrafiltration membrane
  • Preparation method of solvent-resistant modified polyaryletherketone ultrafiltration membrane
  • Preparation method of solvent-resistant modified polyaryletherketone ultrafiltration membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030](1) Add 2.7g polyaryletherketone (x=0.1, y=0.9) (18wt%), 2.25g PEG200 (15wt%) and 10.05g DMAc (N, N'-dimethylacetamide) and stirred at room temperature for 12 h. After vacuum degassing, use a 250 μm scraper to form a film on a clean glass plate and quickly immerse it in a coagulation bath. After the film is peeled off from the glass plate, take it out and place it in Soak in deionized water for 48 hours to remove additives.

[0031] (2) First, add 45 mL of absolute ethanol, 5 mL of 1 mol / L NaOH aqueous solution and 0.6 g of 1,4-dibromobutane into a 100 mL flask to prepare a cross-linking soaking solution.

[0032] (3) Then place the original membrane in the cross-linking soaking solution and heat soak at 60°C, take it out after 48 hours and wash it three times with absolute ethanol and deionized water to remove the cross-linking agent and catalyst on the surface of the membrane, and then place it in the deionized water. Soak in deionized water for later use.

[0033] (...

Embodiment 2

[0035] The difference between this embodiment and embodiment 1 is: the additive PEG2000.75g (5wt%) added in step 1, other steps and parameters are the same as embodiment 1.

Embodiment 3

[0037] The difference between this embodiment and embodiment 1 is that no additive PEG200 is added in step one, and other steps and parameters are the same as in embodiment 1.

[0038] Table 1 is the solvent resistance performance test result of the solvent-resistant modified polyaryletherketone ultrafiltration membrane prepared by the above-mentioned examples, wherein M1 and CL-M1, M2 and CL-M2, M3 and CL-M3 respectively represent embodiment 3, The original film and cross-linked film prepared in embodiment 2, embodiment 1.

[0039] Table 1

[0040]

[0041]

[0042] As shown in Table 1, the results show that the cross-linked film is very stable in non-polar solvents such as ethanol, and does not swell or dissolve at all; it has certain tolerance to polar aprotic solvents such as DMAc.

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Abstract

The invention discloses a preparation method of a modified polyaryletherketone ultrafiltration membrane. The method comprises the following steps: (1) preparing a membrane casting liquid by using a polyaryletherketone containing a benzimidazole structure, a solvent A, and an additive as raw materials, performing defoaming on the membrane casting liquid, then scraping the membrane casting liquid into a membrane on a clean flat plate by using a scraper, then quickly immersing the membrane into deionized water, taking out the membrane after the phase separation is completed, and then soaking themembrane in deionized water to remove the remaining additive to obtain an original membrane of the polyaryletherketone containing a benzimidazole structure; (2) preparing a crosslinking soaking solution by using a crosslinking agent, a solvent B, and a basic catalyst aqueous solution; and (3) placing the original membrane of the polyaryletherketone containing a benzimidazole structure prepared inthe step (1) into the crosslinking soaking solution prepared in the step (2), performing crosslinking soaking at 20-80 DEG C for 1-168 h and then performing taking out, and performing washing to obtain the modified polyaryletherketone ultrafiltration membrane. The preparation method of the invention is simple, efficient, and low in cost. The solvent resistance, high-temperature resistance of the membrane, and the pure water flux of the membrane are improved through cross-linking modification.

Description

technical field [0001] The invention belongs to the technical field of functional polymer materials, and in particular relates to a preparation method of a solvent-resistant modified polyaryletherketone ultrafiltration membrane. Background technique [0002] With the continuous deepening of the degree of industrialization in our country, the problem of environmental pollution is becoming more and more serious, especially the pollution of water resources. Due to the complexity of its components, industrial wastewater often contains a large amount of heavy metal ions, acids, alkalis, and corrosive organic solvents. It is cumbersome to treat with traditional separation methods and consumes a lot of energy. Therefore, it is urgent to develop new and efficient water treatment technologies. . Membrane separation technology has become one of the most promising water treatment methods due to its advantages of high efficiency, environmental protection and low energy consumption. Me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/76B01D69/02B01D67/00B01D61/14
CPCB01D71/76B01D69/02B01D67/0006B01D61/145B01D2325/30
Inventor 王建黎梁军葛姣
Owner ZHEJIANG UNIV OF TECH