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Preparation method of super-hydrophilic ceramic membrane

A super-hydrophilic, ceramic membrane technology, applied in the field of ceramic membrane materials, can solve the problems of insufficient hydrophilicity, membrane pollution, etc., and achieve the effect of improving hydrophilicity, improving stability, and avoiding the reduction of hydrophilicity

Active Publication Date: 2021-02-05
南京钛净流体技术有限公司
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Problems solved by technology

[0004] In order to fundamentally solve the problem of membrane fouling caused by insufficient hydrophilicity on the surface of the ceramic membrane, and realize the long-term and stable attachment of the hydrophilic layer to the surface of the ceramic membrane, the invention provides a method for preparing a superhydrophilic membrane

Method used

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  • Preparation method of super-hydrophilic ceramic membrane
  • Preparation method of super-hydrophilic ceramic membrane
  • Preparation method of super-hydrophilic ceramic membrane

Examples

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Embodiment 1

[0049] Pretreatment of Ceramic Membrane Elements

[0050] The aluminum oxide ceramic membrane with an outer diameter of 30mm and a channel number of 19, a length of 1016mm and a pore diameter of 200nm is selected as the modified membrane element. The contact angle was measured with water as the medium before modification. 5% sulfuric acid solution and 30% hydrogen peroxide solution are mixed according to the volume ratio of 7:3 to form a treatment solution, and the ceramic membrane to be modified is treated by cross-flow filtration at room temperature for 15 hours. Then rinse the ceramic membrane with deionized water to neutral. Then the pretreated ceramic membrane was dried at 120 °C for 2 h. spare.

[0051] Carboxylation Modification of Ceramic Membrane Elements

[0052] Dissolve cysteine ​​powder in 10% acetic acid aqueous solution to form a 5% modifier solution. The above modifier solution was circulated through the pretreated ceramic membrane by means of cross-flow f...

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Abstract

The invention relates to a preparation method of a super-hydrophilic membrane, and belongs to the field of membrane materials. The method mainly comprises the following steps of: 1, pretreatment of amembrane element; 2, carboxylation modification of the membrane element; and 3, improvement of the hydrophilicity of the membrane element. The method starts from grafting modification of the ceramic membrane, a ceramic membrane support body, a transition layer and a membrane separation layer are all covered with a stable hydrophilic layer by selecting a proper modification material, and part of aluminum ions on the surface of the ceramic membrane are replaced with titanium ions through a replacement reaction of carboxylic acid metal salt, so that the hydrophilicity of the membrane is further improved. The organic matter pollution resistance of the ceramic membrane is greatly improved, and the ceramic membrane is particularly suitable for treating hydrocarbon-containing oil wastewater.

Description

technical field [0001] The invention relates to a method for preparing a superhydrophilic ceramic membrane, which belongs to the field of ceramic membrane materials. Background technique [0002] With its unique advantages of high strength, good chemical stability, narrow pore size distribution, and high-flux operation, ceramic membranes have performance that cannot be achieved by general organic membranes. It has already been successfully used in food and beverage, biomedicine, petrochemical, metallurgical electronics and environmental protection water treatment industries. However, during the use of ceramic membranes, the phenomenon of organic membrane fouling will lead to the reduction of the performance of ceramic membranes, especially in the separation of oil and water and protein separation, there will be serious oil and protein adsorption. The reason for this phenomenon is that the surface of the ceramic membrane is not hydrophilic enough, and the contact angle is ...

Claims

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Application Information

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IPC IPC(8): B01D71/02B01D67/00
CPCB01D67/0079B01D71/02B01D2325/36
Inventor 唐礼升王志高
Owner 南京钛净流体技术有限公司
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