Inorganic-organic composite film and preparation method thereof

A composite membrane and inorganic technology, applied in the field of filter materials, can solve the problems of composite membranes that cannot be used repeatedly and low filtration precision, and achieve the effects of good regeneration performance, high filtration precision and high stability

Inactive Publication Date: 2018-08-17
WESTERN BAODE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide an inorganic-organic composite membrane, which solves the problems that the existing organic material has low filtration accuracy and the existing composite membrane cannot be used repeatedly.

Method used

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  • Inorganic-organic composite film and preparation method thereof
  • Inorganic-organic composite film and preparation method thereof

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preparation example Construction

[0036] The preparation method of above-mentioned inorganic-organic composite film, this method adopts such as figure 1 with figure 2 The shown device includes a casting solution tank 1, a crosslinking agent tank 2 and a rotating rod 3, and is specifically implemented according to the following steps:

[0037] Step 1. Prepare organic material casting solution and crosslinking agent, pour the organic material casting solution into casting solution tank 1, and pour the crosslinking agent into crosslinking agent tank 2;

[0038] Among them, the preparation process of the organic material casting solution is as follows:

[0039] Weigh 3% to 25% of the organic material and 75% to 97% of the solvent according to the mass percentage, heat the solvent in a water bath to 50°C to 70°C, and add a pore-forming agent to the solvent while stirring (the mass of the pore-forming agent accounts for the mass of the solvent 0.1% to 0.5% of the pore-forming agent), to fully dissolve the pore-fo...

Embodiment 1

[0048]Weigh 15% of polyvinylidene fluoride and 85% of N-methylpyrrolidone respectively according to mass percentage, then heat N-methylpyrrolidone in a water bath to 50°C, and add 0.1%wt pore-forming agent to the solvent while stirring, so that The pore-forming agent is fully dissolved, then polyvinylidene fluoride is added, and the stirring is continued. After the polyvinylidene fluoride is fully dissolved, aging and defoaming are continued for 24 hours, and finally the organic material casting solution is obtained, and the prepared organic material is cast Pour the membrane solution into the casting solution tank 1; pour deionized water into the cross-linking agent tank 2; install the stainless steel filter element on the rotating rod 3, and the motor drives the rotating rod 3 to rotate at a rotation speed of 30r / min. Adhere to a layer of organic material casting liquid on the surface to obtain the initial composite film, then move the rotating rod 3 into the cross-linking ag...

Embodiment 2

[0051] Weigh 3% of polyvinyl alcohol and 97% of deionized water according to the mass percentage, then heat the polyvinyl alcohol in a water bath to 60°C, and add 0.2%wt pore-forming agent to the solvent while stirring to fully dissolve the pore-forming agent , then add polyvinyl alcohol, and keep stirring. When the polyvinylidene fluoride is fully dissolved, continue aging and defoaming for 24 hours, and finally obtain an organic material casting solution; weigh 0.5% glutaraldehyde, hydrochloric acid 0.1% and deionized water 99.4%, then add hydrochloric acid and glutaraldehyde successively to deionized water, stir and dissolve to obtain crosslinking agent after completely; Pour the prepared organic material casting solution into casting solution tank 1, The coupling agent is poured into the crosslinking agent tank 2; the stainless steel filter element is installed on the rotating rod 3, and the motor drives the rotating rod 3 to rotate at a rotation speed of 50r / min, and a lay...

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Abstract

The invention discloses an inorganic-organic composite film. A support is made of inorganic porous materials and comprises organic materials and cross-linking agents which sequentially coat the support, the thickness of the inorganic porous materials is 1mm-3mm, the thickness of the organic materials is 10-50 micrometers, and the pore diameter of the inorganic-organic composite film is 0.001-1 micrometer. The inorganic-organic composite film has high-strength, impact-resistant, high-precision and high-selectivity filtration performances, and is excellent in renewability. According to a preparation method of the inorganic-organic composite film, after prepared organic material casting solution and the cross-linking agents are poured into a tank, the surfaces of the inorganic porous materials are sequentially coated with the organic material and the cross-linking agents in a spin coating mode, film preparation procedures are finished, operation is simple and convenient, controllability is strong, and stability is high.

Description

technical field [0001] The invention belongs to the technical field of filter materials, and in particular relates to an inorganic-organic composite membrane, and also relates to a preparation method of the inorganic-organic composite membrane. Background technique [0002] Inorganic porous materials, especially metal porous materials and ceramic porous materials, have been widely used in petrochemical, coal chemical, fine chemical and environmental protection fields. In practical applications, the filtration accuracy and chemical selectivity of inorganic materials limit their application range due to chemical inertness and preparation process. The hollow fiber filter element made of organic materials has high filtration accuracy, such as ultrafiltration, nanofiltration and reverse osmosis, and has hydrophilic or hydrophobic properties due to its many chemical functional groups. However, the current hollow fiber filter elements are generally non-renewable and are basically ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/12B01D67/00
CPCB01D67/0011B01D67/0013B01D69/12B01D69/125B01D2323/04
Inventor 王耀辉张晓晗李荣徐龙吴引江南海娟
Owner WESTERN BAODE TECH CO LTD
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