Vermiculite-MXene composite membrane and preparation method and application thereof

A composite membrane and vermiculite technology, applied in the field of nanofiltration membranes, can solve the problems of low pollutant retention rate, poor membrane mechanical properties, and membrane materials that are not resistant to chlorine, etc., and achieve simple preparation methods, low cost, and high water flux Effect

Active Publication Date: 2021-09-07
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, at present, most nanofiltration membranes are made of organic polymers, which have problems such as low pollutant rejection rate, poor membrane mechanical properties, high en

Method used

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  • Vermiculite-MXene composite membrane and preparation method and application thereof
  • Vermiculite-MXene composite membrane and preparation method and application thereof
  • Vermiculite-MXene composite membrane and preparation method and application thereof

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[0039] Example:

[0040] A vermiculite-MXene composite membrane, the preparation method comprising the following steps:

[0041] 1) Add 2 g of thermally expanded vermiculite with a lateral dimension of 3 mm into the round-bottomed flask, then add 200 mL of saturated sodium chloride solution, place the round-bottomed flask in an oil bath at 120°C for condensing and reflux for 24 hours, filter, and the filtered solid is water Rinse repeatedly with ethanol, then disperse in a lithium chloride solution prepared from 10g lithium chloride and 200mL deionized water, condense and reflux at 120°C for 24h, filter, and repeatedly rinse the filtered solid with water and ethanol, add The ionized water was centrifuged, the rotating speed of the centrifuge was 8000rpm, and the centrifugation time was 30min, and then 200mg of the lower sediment was taken and 100mL of deionized water was added to ultrasonic for 12h to obtain vermiculite nanosheets with a concentration of 2mg / mL (scanning elect...

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Abstract

The invention discloses a vermiculite-MXene composite membrane and a preparation method and application thereof. The vermiculite-MXene composite membrane comprises a porous base membrane and a vermiculite-MXene composite layer which are laminated and attached, and the vermiculite-MXene composite layer comprises a vermiculite nanosheet and an MXene nanosheet. The preparation method of the vermiculite-MXene composite membrane comprises the following steps: dispersing vermiculite nanosheets and MXene nanosheets in a solvent to prepare a coating liquid, then coating the surface of a porous base membrane with the coating liquid, and drying to obtain the vermiculite-MXene composite membrane. The vermiculite-MXene composite membrane has ultrahigh water flux, relatively high selectivity, good mechanical property and stability and high reutilization frequency, and the preparation method of the vermiculite-MXene composite membrane is simple, low in energy consumption, low in cost and wide in applicability.

Description

technical field [0001] The invention relates to the technical field of nanofiltration membranes, in particular to a vermiculite-MXene composite membrane and its preparation method and application. Background technique [0002] The separation process is a very important part of the chemical industry. The traditional separation methods represented by rectification face problems such as high energy consumption and low efficiency, which not only have a serious impact on the environment, but also are not conducive to the sustainable development of society. Due to the advantages of low energy consumption, high safety, small footprint, cleanliness and high efficiency, nanofiltration membrane separation technology has been highly valued by governments of various countries, especially developed countries, in recent decades. However, at present, most nanofiltration membranes are made of organic polymers, which have problems such as low pollutant rejection rate, poor membrane mechanica...

Claims

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Application Information

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IPC IPC(8): B01D61/02B01D67/00B01D69/02B01D69/12B01D71/02B01D71/10B01D71/26B01D71/48B01D71/68C02F1/44C02F101/30
CPCB01D61/027B01D71/027B01D71/48B01D71/68B01D71/26B01D71/10B01D69/12B01D67/0079B01D69/02C02F1/442B01D2325/36C02F2101/308
Inventor 王海辉肖丹丁力赵子颢
Owner SOUTH CHINA UNIV OF TECH
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