Novel separation film and preparation method thereof

A production method and separation membrane technology, applied in the field of separation membrane, can solve the problems of high operating cost of membrane process, membrane fouling, and high price of membrane and membrane equipment, and achieve the effects of good separation performance, simple membrane production process and low production cost.

Inactive Publication Date: 2011-10-12
周志杰
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Problems solved by technology

However, the existing membrane materials for membrane separation must not only ensure that they have good separation performance, but also ensure that the membrane can be used repeatedly for a long time, and that the membrane can withstand the pressure of the feed liquid and the repeated washing of the membrane, which greatly limits the choice of membrane materials.
Although there are only dozens of membrane-making processes after decades of development, there are only a dozen of them that can be maturely applied, which also greatl

Method used

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  • Novel separation film and preparation method thereof
  • Novel separation film and preparation method thereof
  • Novel separation film and preparation method thereof

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Embodiment Construction

[0025] 1 Single film production method

[0026] (1) Manufacturing method of single hydrophilic membrane:

[0027] Put the selected starch and cellulose in warm clear water to make slurry, filter and evenly brush (or scrape or spray) on a flat plate or columnar cylinder to dry into a starch cellulose film. When the water content of the starch cellulose film drops Microporous hydrophilic membrane can be made by irradiating it with microwave (or infrared ray, ultrasonic wave) to make it puff up to 5%--30%.

[0028] (2) Method for making a single hydrophobic membrane

[0029] Homogenize raw egg whites at room temperature, filter and evenly brush (or scrape, spray) on a flat plate or columnar cylinder to make it into a protein film. When the water content drops to 5% - 30%, use Microporous hydrophobic membrane can be made by irradiating it with microwaves (infrared rays, ultrasonic waves) to make it thermally deformed and expanded.

[0030] 2. The production method of enhanced m...

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Abstract

The invention discloses a preparation method of a novel separation film, comprising the following steps of: respectively heating a starch cellulose film with water content of 5-30% and a protein film with water content of 5-30% to 100-150 DEG C and carrying out an expansion process to form a microporous hydrophilic film with micropores and a microporous hydrophobic film with the micropores, respectively. The microporous hydrophilic film and the microporous hydrophobic film are compounded to prepare a hydrophilic-hydrophobic, hydrophilic-hydrophobic-hydrophilic, hydrophobic-hydrophilic-hydrophobic composite film or the microporous hydrophilic film and the microporous hydrophobic film and a screen are compounded into an enhancing type separation film. The preparation method of the novel separation film has the advantages of favourable separation performance, low price, simple film-preparing process and low preparation cost.

Description

Technical field: [0001] The invention relates to a separation membrane which can be used in low-pressure membrane separation and membrane distillation processes and a manufacturing method thereof. Background technique: [0002] Membrane separation technology is widely used in food, chemical, pharmaceutical and other fields because of its high efficiency, energy saving and environmental protection. However, the existing membrane materials for membrane separation must not only ensure that they have good separation performance, but also ensure that the membrane can be used repeatedly for a long time, and that the membrane can withstand the pressure of the feed liquid and the repeated washing of the membrane, which greatly limits the choice of membrane materials. . Although there are only dozens of membrane-making processes after decades of development, there are only a dozen of them that can be maturely applied, which also greatly limits the development and application of memb...

Claims

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Application Information

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IPC IPC(8): B01D71/06B01D71/10B01D69/12B01D69/00
Inventor 周志杰周子琪周志国苏航
Owner 周志杰
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