A kind of ultrafiltration membrane and preparation method thereof

A technology of ultrafiltration membrane and polymer membrane, which is applied in the field of ultrafiltration membrane and its preparation, can solve problems affecting ultrafiltration performance, affecting practical application, destroying ultrafiltration membrane structure, etc., and achieves low mass transfer resistance and high loading capacity , the effect of simple operation

Active Publication Date: 2020-05-19
NANJING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a mutual restriction between the content of nano-adsorbent materials introduced by blending in the adsorption membrane material and the interception performance of the ultrafiltration membrane. Too much blending of nano-adsorbent materials will destroy the structure of the ultrafiltration membrane and affect the ultrafiltration performance. , if the blending amount of nano-adsorbent materials is too small, the adsorption sites of the adsorption membrane material will decrease, which will reduce the performance of adsorbing small molecule pollutants
In addition, the membrane matrix material will wrap the nano-adsorption material blended in it, making its surface adsorption sites useless
The defects of the adsorption membrane material affect its practical application and need to be solved urgently to promote the progress of water treatment technology and methods

Method used

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  • A kind of ultrafiltration membrane and preparation method thereof
  • A kind of ultrafiltration membrane and preparation method thereof
  • A kind of ultrafiltration membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Step 1, Synthesis of Nanoporous Hollow Beads

[0050] In this embodiment, the synthesized porous hollow hydrated zirconia spheres are selected as the nanoporous hollow spheres.

[0051] The preparation of porous hollow hydrated zirconia balls is divided into four steps. The first step is to prepare SiO 2 For small balls, add 18mL of ammonia water and 49.5mL of distilled water into 32.5mL of absolute ethanol, stir for half an hour, then add a mixture of 9ml of tetraethyl orthosilicate and 91ml of absolute ethanol, and continue magnetic stirring for 8h After the reaction is completed, the reaction solution is centrifuged, washed alternately with distilled water and ethanol, and the operation is repeated three times, and the product is dispersed in 320mL of absolute ethanol; in the second step, 1mL of distilled water and 0.75g of Brij- 35. After stirring for 2 hours, a mixed solution containing 4.5 mL of zirconium n-butoxide and 45.5 mL of absolute ethanol was added ther...

Embodiment 2

[0067] Step 1, Synthesis of Nanoporous Hollow Beads

[0068] In this embodiment, synthetic porous hollow carbon spheres are selected as nanoporous hollow spheres.

[0069] Add 1.04g of 25wt% CTAC to a mixed solution containing 19mL of distilled water, 0.1mL of ammonia water and 5mL of absolute ethanol, stir for half an hour, add 0.2g of resorcinol, and continue stirring for half an hour. 0.72 mL of tetraethyl orthosilicate and 0.28 mL of formaldehyde solution were added to the above mixed solution, and the reaction was stirred at 30° C. for 24 h. After the reaction, the solid was obtained by centrifugation and dried at 80° C. for 12 h. The dried solid was calcined at 200° C., 350° C., 500° C., and 600° C. for 2 h under the protection of nitrogen, and then calcined at 800° C. for 5 h. Finally, porous hollow carbon spheres are obtained. In this example, a large number of spherical particles with a hollow structure were synthesized with a particle size of about 200-300 nm.

...

Embodiment 3

[0081] Step 1, Synthesis of Nanoporous Hollow Beads

[0082] In this embodiment, synthetic porous hollow ferric oxide balls are selected as nanoporous hollow balls.

[0083] The porous hollow Fe3O4 balls were synthesized by a one-step hydrothermal method. 2mmol ferric chloride, 4mmol sodium citrate and 6mmol urea were dissolved in 40mL distilled water, then 0.3g polyacrylamide was added and stirred until completely dissolved. The obtained solution was transferred to a polytetrafluoroethylene-lined reactor and reacted at 200° C. for 12 h. After cooling to room temperature, it was centrifuged to obtain a black solid, which was washed alternately with water and absolute ethanol, and dried under vacuum conditions to finally obtain porous hollow ferric oxide balls. In this example, a large number of spherical particles with a hollow structure were synthesized with a particle size of about 200-300 nm.

[0084] Step 2, the preparation of PES ultrafiltration membrane

[0085] In t...

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Abstract

An ultrafiltration membrane and a preparation method thereof are provided. The ultrafiltration membrane comprises a cavity composed of a sulfone-based polymer film matrix and an organic polymer encapsulation layer, wherein the cavity comprises nano-adsorbent. The preparation method comprises following steps: (1) synthesis of nano-adsorbent;(2)preparing the sulfone-based polymer film matrix by immersion-sedimentation phase transformation method; (3) filling from the bottom of the sulfone-based polymer film matrix with the nano-adsorbent, and using organic polymer to encapsulate after filling to obtain a multifunctional ultrafiltration membrane.

Description

technical field [0001] The invention belongs to the technical field of water treatment, specifically to the technical field of membrane separation, in particular to an ultrafiltration membrane and a preparation method thereof. Background technique [0002] Water is the most basic substance on which all life on earth depends. However, due to human activities and industrial production, whether in developed or developing countries, a large amount of pollutants are discharged into the water environment, causing water pollution and water resource shortages. This poses a major challenge to human public health and safety. Today, 884 million people in the world lack safe drinking water every year, and 1.8 million children die from diseases caused by water pollution. A fundamental issue for human development in the coming decades will be access to safe drinking water. In addition, due to the increasing shortage of resources, an important theme of future world development is energy ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D69/02B01D67/00B01D71/68B01D69/10B01J13/02B01J20/06B01J20/20B01J20/28C02F1/28C02F1/44
CPCB01D67/0079B01D69/02B01D69/10B01D71/68B01D2323/286B01D2325/12B01J13/02B01J20/06B01J20/20B01J20/28033C02F1/281C02F1/283C02F1/444
Inventor 李健生潘顺龙方小峰王连军孙秀云沈锦优韩卫清刘晓东
Owner NANJING UNIV OF SCI & TECH
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