A kind of anti-biological fouling composite membrane modified by quinolone signal molecule inhibitor and preparation method thereof

A technology of anti-biological fouling and signaling molecules, which is applied in the field of anti-biological fouling composite membranes and their preparation, and the preparation of high-performance anti-biological pollution water treatment membranes. Pollution performance, combined with stable effects

Active Publication Date: 2020-11-27
BEIJING NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the biofouling problem of the membrane in the existing water treatment membrane system, based on the correlation between quorum sensing and biofilm formation, through the phase inversion method, innovatively use the PQS inhibitor methyl anthranilate (MA ) and nano-intermediate carrier GO were blended and implanted into PVDF membrane to prepare a new type of anti-biofouling composite membrane

Method used

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  • A kind of anti-biological fouling composite membrane modified by quinolone signal molecule inhibitor and preparation method thereof
  • A kind of anti-biological fouling composite membrane modified by quinolone signal molecule inhibitor and preparation method thereof
  • A kind of anti-biological fouling composite membrane modified by quinolone signal molecule inhibitor and preparation method thereof

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Experimental program
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Embodiment

[0015] (1) 50 mg GO was ultrasonically dispersed in 100 mL pure water to obtain a uniform GO dispersion.

[0016] (2) Add 100 μL EDC and 150 μL MA to the dispersion, and stir at room temperature for 24 hours to fully react GO and MA.

[0017] (3) The stirred mixture was centrifuged (10000 rad, 10 min), and the supernatant was discarded. Repeat the operation 4 times. Finally, the lower precipitate was placed in an oven at 70 °C for about 24 h to remove water molecules, and the GO / MA nanocomposite was obtained.

[0018] (4) Dry the PVDF powder in an oven (70°C, 24h), and dissolve the PVDF powder in a dimethylacetamide (DMAc) solution under continuous stirring to prepare a casting solution. The composition of the casting solution is 20wt% PVDF and 80% DMAc.

[0019] (5) Stir the casting solution for 24 hours at 20°C until the added powder is completely dissolved.

[0020] (6) Leave the uniformly stirred casting solution overnight to remove air bubbles, and use an automatic fi...

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Abstract

The invention discloses an anti-biological pollution composite membrane modified by using quinolone signal molecule inhibitor and preparation method thereof, and belongs to the field of membrane method water treatment. The preparation method comprises the following steps: 1) subjecting a quinolone (PQS) signal molecule inhibitor methyl anthranilate (MA) and a nano-material graphene oxide (GO) to adehydration condensation reaction so as to prepare a stable nano-composite material GO / MA; 2) carrying out blending treatment, and adding the GO / MA nano composite material and polyvinylidene fluoride(PVDF) into a solvent to prepare a membrane casting solution; and 3) carrying out phase conversion treatment to prepare the GO / MA-PVDF modified composite membrane. A series of optimization experiments prove that the water flux of the GO / MA-PVDF composite membrane prepared by the invention is obviously improved to 150 L / m<2>*h*bar. The flux reduction amplitude of the modified GO / MA-PVDF compositemembrane is reduced by 27% compared with that of a PVDF membrane, the contents of biological membrane component protein and polysaccharide on the surface of the modified membrane are reduced by 67% and 39% respectively, and the number of cells is reduced by 72%. The results prove that the modified composite membrane has biological pollution resistance.

Description

technical field [0001] The invention relates to an anti-biological pollution composite membrane modified by a quinolone (PQS) signal molecule inhibitor and a preparation method thereof, in particular to a preparation method of a high-performance anti-biological pollution water treatment membrane. The invention belongs to the field of membrane technology water treatment and membrane anti-biological pollution. Background technique [0002] In recent years, membrane separation technology has been widely used in the field of drinking water and sewage treatment. However, the increase of transmembrane osmotic pressure caused by membrane fouling, the decrease of membrane flux and rejection rate, and the increase of chemical cleaning frequency shorten the service life of the membrane and increase the operating cost, thus limiting the wide application of membrane technology. Membrane fouling mainly includes inorganic fouling, organic fouling, colloid fouling and biological fouling. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/82B01D71/34B01D69/12B01D69/02B01D67/00
CPCB01D67/0093B01D69/02B01D69/125B01D71/34B01D71/82B01D2325/30
Inventor 杨禹梁菁侯立安
Owner BEIJING NORMAL UNIVERSITY
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