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Organic-inorganic composite film and preparation method thereof

An inorganic composite membrane and inorganic composite technology, applied in chemical instruments and methods, membranes, membrane technology, etc., can solve the problems of composite membrane flux attenuation, large pollutant treatment capacity, etc., and achieve high hydrophilicity and high flux , Conducive to the effect of large-scale continuous production

Active Publication Date: 2018-12-18
绍兴齐英膜科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, although the above-mentioned patents have improved the mechanical strength of the composite membrane, they have not solved the problem of large amount of pollutants to be treated in the water treatment process, repeated types, and serious flux attenuation of the composite membrane.

Method used

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  • Organic-inorganic composite film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Select a copolymer of acrylonitrile and acrylic acid with a molar content of acrylic acid of 90% and a number average molecular weight of 5000 g / mol as a polymer, dissolve the polymer and polyvinylidene fluoride in N,N-dimethylformamide, stir and mix Uniform, standing for defoaming, the obtained polymer mass fraction is 15% (that is, the mass ratio of polymer to film-forming solution is 15:100).

[0033] The membrane-forming solution is transferred into a membrane-forming coagulation bath to prepare an organic ultrafiltration membrane. The organic ultrafiltration membranes were impregnated in 0.1M CaCl 2 Aqueous solution, deionized water, 0.1M Na 2 CO 3 The aqueous solution and deionized water were used for 10 seconds, and one cycle was regarded as one deposition. After five cycles of deposition, the composite film was placed in a clear water bath for oscillating cleaning for 20 hours to obtain the organic-inorganic composite film. The pure water flux of the composit...

Embodiment 2

[0035]Select a copolymer of methyl methacrylate and acrylic acid with a molar content of 10% acrylic acid and a number average molecular weight of 60,000 g / mol as the polymer, and dissolve the polymer and polyvinylidene fluoride in N,N-dimethylacetamide , dissolve the polymer and polyvinylidene fluoride in N,N-dimethylformamide, stir and mix evenly, let stand for defoaming, and obtain a polymer mass fraction of 10% (that is, the mass of the polymer and the film-making solution The ratio is 10:100).

[0036] The membrane-forming solution is transferred into a membrane-forming coagulation bath to prepare an organic ultrafiltration membrane. The organic ultrafiltration membranes were impregnated in 0.2M CaCl 2 Aqueous solution, deionized water, 0.2M Na 2 CO 3 The aqueous solution and deionized water were used for 10 seconds, and one cycle was regarded as one deposition. After 10 cycles of deposition, the composite film was placed in a clear water bath and washed for 20 hours b...

Embodiment 3

[0038] Select the copolymer of styrene and hydroxyethyl methacrylate with a molar content of 30% of hydroxyethyl methacrylate and a number average molecular weight of 10000g / mol as a polymer, and dissolve the polymer and polyacrylonitrile in N,N- In dimethylacetamide, stir and mix evenly, let stand for defoaming, and obtain a polymer mass fraction of 12% (ie, the mass ratio of the polymer to the film-forming solution is 12:100).

[0039] The membrane-forming solution is transferred into a membrane-forming coagulation bath to prepare an organic ultrafiltration membrane. The organic ultrafiltration membrane was immersed in 0.2M tetraethyl orthosilicate aqueous solution, deionized water, 0.2M hydrochloric acid aqueous solution, and deionized water for 10 seconds, and one cycle was one deposition. After deposition for 8 cycles, the composite The membrane was shaken and washed in a water bath for 20 hours to obtain the organic-inorganic composite membrane. The pure water flux of t...

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Abstract

The invention discloses an organic-inorganic composite film and a preparation method thereof. The organic-inorganic composite membrane is prepared by the following steps: (1) preparing a film formingliquid from an organic film-forming polymer, a polar copolymer and a solvent, (2) transferring the film forming liquid into a film forming coagulation bath to obtain an organic ultrafiltration film, and (3) loading the surface and interior of the organic ultrafiltration film with inorganic particles through an alternate impregnation method to obtain the organic-inorganic composite separation film.The composite film has the characteristics of high hydrophilicity, high flux and high rejection rate of the dye. The preparation method has simple and easy processes and is suitable for continuous and stable production.

Description

technical field [0001] The invention belongs to the field of polymer separation membranes, and in particular relates to an organic-inorganic composite membrane and a preparation method thereof. Background technique [0002] With the continuous rise of resource costs and the gradual enhancement of environmental protection awareness, many companies have begun to use green technologies to reduce carbon emissions and minimize waste generation. Water treatment technology is one of the most important green technologies, and it is also an important symbol of the development level of the national environmental protection industry. In the development of water treatment technology, membrane technology has been widely used in water treatment due to its advantages of high efficiency, practicality, adjustability, energy saving and simple process, and has produced extremely high economic benefits. play an important role in daily life. As my country's water purification and sewage treatm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/68B01D71/42B01D71/34B01D71/02B01D69/12B01D69/02B01D67/00
CPCB01D67/0079B01D69/02B01D69/12B01D71/022B01D71/34B01D71/42B01D71/68B01D2325/36
Inventor 智锁红耿啸天丁超李刚
Owner 绍兴齐英膜科技有限公司
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