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Inorganic porous membrane

A porous membrane and inorganic technology, applied in the field of inorganic porous membrane and its formation, can solve problems such as twists and turns, irregular pores, and poor microstructure

Pending Publication Date: 2022-03-11
NAT UNIV OF SINGAPORE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are still challenges in both membrane preparation and membrane performance, especially in water and wastewater treatment
Conventional inorganic membrane preparation processes lead to the formation of membranes with poor microstructure, irregular and tortuous pores, unsuitable for high filtration flux, and often lead to mechanical failure at the interface between different layers
Poor water and wastewater treatment performance can be due to rapid fouling, which results in high maintenance and operating costs

Method used

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  • Inorganic porous membrane
  • Inorganic porous membrane
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Examples

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Embodiment

[0083] Material

[0084] Commercially available alumina powders were purchased from SUMITOMO CHEMICAL (Japan), including type AA-04 (grain size 0.5 μm, used to prepare the feed composition for the top active layer) and Type AA-3 (grain size 3.4 μm, used to prepare the feed composition for the buffer layer). Surfactant F127 powder was purchased from SIGMA-ALDRICH (Singapore) and used without further purification. Obtain a commercially available porous ceramic substrate support (e.g., polycrystalline Al 2 o 3 ).

[0085] Gradient film preparation method

[0086] An alumina suspension / paste was prepared by adding 27 wt% alumina powder to deionized water. Subsequent 17wt% F127 powder was added to the suspension and allowed to stand in a refrigerator at a temperature of 6° C. for about 20 hours to dissolve. After gentle and thorough stirring at a temperature of 2-8°C, a feed composition is obtained. The feed composition was then dip-coated layer by layer on a porous cera...

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PUM

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Abstract

There is provided an inorganic layered porous membrane comprising at least two layers, where each of the at least two layers comprises a different average pore size compared to the other of the at least two layers, and where the membrane comprises a patterned surface. A method of forming a film is also provided.

Description

technical field [0001] The present invention relates to an inorganic porous film and its forming method. Specifically, the membrane is an inorganic layered porous membrane. Background technique [0002] Inorganic membranes such as ceramic membranes have several known advantages over polymeric membranes, including better mechanical integrity, heat and chemical resistance, less environmental pollution, extended membrane life, higher filtration throughput, and more efficient high pressure backwash operation. However, there are still challenges in both membrane preparation and membrane performance, especially in water and wastewater treatment. Conventional inorganic membrane preparation processes lead to the formation of membranes with poor microstructure, irregular and tortuous pores, unsuitable for high filtration flux, and often lead to mechanical failure at the interface between different layers. Poor water and wastewater treatment performance can be due to rapid fouling,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/02B01D65/08B29C64/165B01D67/00B01D61/14C02F1/44
CPCB01D61/14B01D65/08C02F1/44B33Y80/00B29C64/106B33Y10/00B01D69/02B01D2325/08B01D2315/10B01D71/025B01D67/00415B01D67/00411B01D69/1216B01D67/0069B01D2325/022B01D2325/04B01D2325/20C02F1/444
Inventor 王家功吕之阳黄浩勇黄志强丁军
Owner NAT UNIV OF SINGAPORE