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Ag@NH2-MIL-125/polyarylether sulfone hybrid dense reactive ultrafiltration membrane and preparation method thereof

A NH2-MIL-125, polyarylene ether technology, applied in chemical instruments and methods, ultrafiltration, membrane technology, etc., can solve the problems of shortened life of ultrafiltration membrane components, increased cleaning and replacement frequency, and decreased separation efficiency.

Active Publication Date: 2019-04-12
NORTHEAST NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the strong hydrophobicity of the molecular structure of the commercialized polyarylethersulfone material, obvious membrane fouling occurs during the use of this type of ultrafiltration membrane, resulting in a decrease in flux and a decrease in separation efficiency, which ultimately leads to a decrease in the life of the ultrafiltration membrane module. shortening, cleaning and replacement frequency increases, and water treatment costs increase, which have become the main bottleneck problems in the actual promotion and application of ultrafiltration membrane separation technology

Method used

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  • Ag@NH2-MIL-125/polyarylether sulfone hybrid dense reactive ultrafiltration membrane and preparation method thereof
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  • Ag@NH2-MIL-125/polyarylether sulfone hybrid dense reactive ultrafiltration membrane and preparation method thereof

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preparation example Construction

[0030] The invention provides an Ag@NH 2 -MIL-125 / polyarylethersulfone hybrid dense reactive ultrafiltration membrane and its preparation method, including:

[0031] Step 1: Dissolve butyl titanate and 2-aminoterephthalic acid in a mixed solution of methanol and N,N-dimethylformamide, stir at room temperature for 6-10 hours, then transfer to a reaction kettle and put Put it into the temperature-programmed oven at 150°C-160°C for 24-48 hours. After the reaction, the powdery product generated in the reactor is separated by high-speed centrifugation, and then washed with methanol and N,N-dimethylformamide for several times. times and then dried and ground to obtain NH 2-MIL-125 material. According to the present invention, the molar ratio of butyl titanate to 2-aminoterephthalic acid is preferably 1:4; the volume ratio of methanol to N,N-dimethylformamide is preferably 1:1.

[0032] Step 2: Incorporate AgNO 3 Dissolve in deionized water, then add the powder obtained in step 1...

Embodiment 1

[0044] 1) Dissolve 2-aminoterephthalic acid (0.009mol, 1.5g) and butyl titanate (0.00225mol, 0.84mL) in a mixture of methanol (5mL) and N,N-dimethylformamide (5mL) The solution was stirred at room temperature for 6 hours until it was completely dissolved, and the obtained solution was sonicated for 5 minutes, then transferred to a 40 mL polytetrafluoroethylene-lined high-temperature and high-pressure reactor, and placed in a temperature-programmed oven. Set the temperature-programmed oven to raise the temperature to 150°C at a rate of 2°C / min, keep it for 24 hours and then cool to room temperature. Transfer the resulting product to a 50mL centrifuge tube, centrifuge at 800 rpm for 10 minutes, pour off the supernatant, add 20mL N,N-dimethylformamide and stir for 2 hours, then centrifuge at the same speed and time Finally, pour off the supernatant, repeat 3 times, then add 20mL methanol and continue washing 3 times in the same way to complete the washing step. Finally, the prod...

Embodiment 2

[0053] 1) the method described in 1) of embodiment 1 makes NH 2 - MIL-125 material;

[0054] 2) Take 0.096g AgNO 3 Dissolve in deionized water, and make up to 100mL, add 2g of the above NH 2 - MIL-125 material, after stirring evenly, sonicate for 5 minutes, transfer the above mixture to a quartz photoreactor, place the photoreactor in a water bath circulation container equipped with temperature control to start stirring, and use a 300W xenon lamp to irradiate for 45 minutes. After the obtained product was washed with deionized water for 3 times, it was placed in a vacuum drying oven and dried at 60°C for 6 hours, cooled to room temperature, and then ground to obtain NH with a mass fraction of 3% loaded silver. 2 -MIL-125 photocatalytic material, named: 3%Ag@NH 2 -MIL-125.

[0055] 3) The method described in 3) of Example 1 makes polyarylethersulfone matrix material (PAES-CF 3 -COOH).

[0056] 4) As described in 4) of Example 1, using the 3% Ag@NH prepared above 2 -MIL-1...

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Abstract

The invention provides an Ag@NH2-MIL-125 / polyarylether sulfone hybrid dense reactive ultrafiltration membrane and a preparation method thereof, and belongs to the technical field of polymer materials.The method comprises the following steps of: firstly, preparing a sunlight-responsive photocatalytic material Ag@NH2-MIL-125; and then introducing the photocatalytic material into a polyarylether sulfone molecular chain structure through molecular design and chemical bond action to synthesize the Ag@NH2-MIL-125 / polyarylether sulfone hybrid material, and preparing a dense reactive ultrafiltrationmembrane by using an immersion precipitation phase conversion method. The ultrafiltration membrane shows excellent separation performance and high-efficiency sunlight response self-cleaning capabilityin the treatment process of dye wastewater, and has important significance and wide application prospect in the technical field of water treatment membrane separation.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, in particular to an Ag@NH 2 -MIL-125 / polyaryl ether sulfone hybrid dense reactive ultrafiltration membrane and its preparation method. Background technique [0002] In recent years, membrane separation technology has been widely used in the field of separation and purification, especially the ultrafiltration membrane separation technology, which requires less energy consumption in the separation process and is easy to operate, has been widely used in the field of water treatment. Polymer materials such as bisphenol A polysulfone (PSF), polyarylether sulfone (PAES), polyvinylidene fluoride (PVDF), cellulose acetate (CA), and polyacrylonitrile (PAN) have been used in commercial ultra- The preparation of filter membranes, in which PAES ultrafiltration membrane materials have received widespread attention because of their high mechanical properties, good thermal stability, corrosion resist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/68B01D71/06B01D69/12B01D67/00B01D61/14C08G83/00
CPCB01D61/145B01D67/0006B01D69/12B01D71/06B01D71/68C08G83/001
Inventor 耿直王馨昱杨霞耿文哲冯永
Owner NORTHEAST NORMAL UNIVERSITY
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