Multifunctional bio-based composite microporous membrane and preparation method thereof

A microporous membrane, bio-based technology, applied in the field of water treatment and purification, can solve problems such as water resources pollution, and achieve the effects of simple preparation process, convenient operation, stable and efficient treatment

Active Publication Date: 2020-06-30
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] At the same time, small highly toxic aromatic compounds in sewage, such as p-nitrophenol, have brought huge pollution to water resources and are also a difficult problem in water treatment.

Method used

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  • Multifunctional bio-based composite microporous membrane and preparation method thereof
  • Multifunctional bio-based composite microporous membrane and preparation method thereof
  • Multifunctional bio-based composite microporous membrane and preparation method thereof

Examples

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Embodiment 1

[0036] This example is an example of the preparation method of the multifunctional bio-based composite microporous membrane of the present invention. The preparation method of the multifunctional bio-based composite microporous membrane in this embodiment comprises the following steps:

[0037] (1) Under nitrogen protection, dissolve 3g D-type polylactic acid and 17g L-type polylactic acid in 80g N-methylpyrrolidone to obtain a film-forming precursor solution, wherein the dissolution temperature is 85 ° C, and the dissolution time is 5h; then In this film-forming precursor solution, add 20g active solution to carry out in-situ polymerization reaction, wherein, active solution is made of azobisisobutyronitrile, N-vinylpyrrolidone and vinyltriethoxysilane (mass ratio is nitrogen two Isobutyronitrile: N-vinylpyrrolidone: vinyltriethoxysilane = 1:80:50), the reaction time is 24h; after the reaction, the protective gas protection is stopped and the defoaming is carried out, and the f...

Embodiment 2

[0041] This example is an example of the preparation method of the multifunctional bio-based composite microporous membrane of the present invention. The preparation method of the multifunctional bio-based composite microporous membrane in this embodiment comprises the following steps:

[0042] (1) Under nitrogen protection, dissolve 6g D-type polylactic acid and 14g L-type polylactic acid in 80g N-methylpyrrolidone to obtain a film-forming precursor solution, wherein the dissolution temperature is 80°C and the dissolution time is 7h; then In this film-forming precursor solution, add 20g active solution to carry out in-situ polymerization reaction, wherein, active solution is made of azobisisobutyronitrile, N-vinylpyrrolidone and vinyltriethoxysilane (mass ratio is nitrogen two Isobutyronitrile: N-vinylpyrrolidone: vinyltriethoxysilane = 1:70:30), the reaction time is 24h; after the reaction, the protective gas protection is stopped and the defoaming is carried out, and the fl...

Embodiment 3

[0048] This example is an example of the preparation method of the multifunctional bio-based composite microporous membrane of the present invention. The preparation method of the multifunctional bio-based composite microporous membrane in this embodiment comprises the following steps:

[0049] (1) Under nitrogen protection, 4g D-type polylactic acid and 13g L-type polylactic acid were dissolved in 83g dimethyl sulfoxide to obtain a film-forming precursor solution, wherein the dissolution temperature was 90°C and the dissolution time was 9h; Add 20g active solution in this film-forming precursor solution to carry out in-situ polymerization reaction, wherein, active solution is made of azobisisobutyronitrile, N-vinylpyrrolidone and vinyltriethoxysilane (mass ratio is nitrogen diisobutyronitrile Nitrile: N-vinylpyrrolidone: vinyltriethoxysilane = 1:70:30), the reaction time is 28h; after the reaction, the protective gas protection is stopped and the defoaming is carried out, and...

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Abstract

The invention discloses a multifunctional bio-based composite microporous membrane and a preparation method thereof, and belongs to the field of water treatment and purification. The multifunctional bio-based composite microporous membrane is mainly composed of a separation layer and a support layer, the separation layer is mainly prepared by mixing a nano material and an additive, and has a three-dimensional structure capable of intercepting dye small molecules; the support layer comprises a stereocomplex polylactic acid microporous membrane and noble metal nanoparticles which are loaded in the stereocomplex polylactic acid microporous membrane and have catalytic performance, so that rapid degradation of aromatic compounds in a sewage system is realized. Compared with a microporous membrane in the prior art, the multifunctional bio-based composite microporous membrane disclosed by the invention can be used for more stably and efficiently treating dye molecules and aromatic compounds in sewage under the synergistic effect of the separation layer and the support layer, and meanwhile, the multifunctional bio-based composite microporous membrane is simple in preparation process and convenient to operate, and has very important scientific and application prospects.

Description

technical field [0001] The invention belongs to the field of water treatment and purification, and in particular relates to a multifunctional bio-based composite microporous membrane with separation and catalytic performance and a preparation method thereof. Background technique [0002] Water pollution and water shortage are becoming major challenges to the sustainable development of the world economy and society. A large amount of wastewater polluted by various dyes is discharged during the dyeing process of textiles, which seriously pollutes the ecological environment. And many dyes are toxic in nature, with potential carcinogenic and genotoxic effects. However, the handling of dyes has proven to be quite difficult to handle, because most commercial dyes have complex aromatic structures, which are difficult to degrade and decolorize. Therefore, the removal of dye molecules from printing and dyeing wastewater is of crucial environmental significance. [0003] In most ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/48B01D71/02B01D69/12B01D69/10B01D69/02B01D67/00C02F1/44C02F1/70C02F101/30C02F101/32
CPCB01D71/48B01D71/022B01D69/12B01D69/125B01D69/10B01D69/02B01D67/0079C02F1/44C02F1/705B01D2325/10C02F2101/32C02F2101/308
Inventor 熊竹杨洋胡春
Owner GUANGZHOU UNIVERSITY
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