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Membrane modification method for controlling membrane pollution

A technology for controlling and modifying membranes, applied in chemical instruments and methods, membrane technology, semipermeable membrane separation, etc.

Active Publication Date: 2017-07-14
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to propose an effective and long-acting method for D-amino acid to control membrane fouling in view of the problems existing in the way of D-amino acid to control membrane biofouling

Method used

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  • Membrane modification method for controlling membrane pollution

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Embodiment 1

[0018] (1) Selection and acid modification of halloysite

[0019] The halloysite, a natural nano material, was selected, and the halloysite was treated with 3M sulfuric acid at 50°C for 5 hours, then washed with deionized water, filtered and dried to obtain acid-modified halloysite.

[0020] (2) Preparation of acid-modified halloysite-dopamine composites

[0021] Disperse 1 g of acid-modified halloysite powder in 10 mM Tris-HCl (pH=8.5) buffer solution to prepare a halloysite mixture, add 0.5 g of dopamine, stir magnetically at 25 ° C for 24 h, and then wash with deionized water 1. Vacuum drying at 45° C. in a vacuum oven to prepare acid-modified halloysite-dopamine nanocomposites.

[0022] (3) Synthesis of halloysite-dopamine-D-tyrosine nanocomposites

[0023] Prepare 0.2g / L D-tyrosine solution, add 0.5g acid-modified halloysite-dopamine composite material, stir magnetically at 25°C for 12h, wash with deionized water, and prepare halloysite-dopamine-D-tyrosine Acid (HDD) c...

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Abstract

The invention relates to a method for controlling membrane pollution by virtue of D-amino acid. The method comprises the steps of coating the surface of a natural nano-material, namely halloysite with dopamine, binding D-amino acid to halloysite so as to synthesize a nano-composite material capable of maintaining activity of D-amino acid, and adding the nano-composite material into a membrane casting liquid of an ultrafiltration membrane so as to prepare a D-amino acid modified anti-pollution ultrafiltration membrane. By efficiently utilizing the potential of D-amino acid for controlling the membrane pollution and the hydrophily of the composite material, the anti-pollution capacity of the membrane is remarkably improved, an effective and long-acting strategy is provided for controlling the membrane pollution by virtue of D-amino acid, and therefore, the wide application of membrane techniques in the water treatment field is promoted.

Description

technical field [0001] The invention belongs to the field of membrane water treatment, and in particular relates to a membrane modification method for controlling membrane pollution. Background technique [0002] Membrane separation technology has great potential in the field of water treatment, but membrane fouling is the main bottleneck restricting the development of membrane technology. At present, the control methods of membrane fouling include membrane surface modification, pretreatment, physical and chemical cleaning methods, etc., among which membrane modification is the most fundamental method to control membrane fouling. [0003] D-amino acid is a new type of environment-friendly biomembrane inhibitor molecule discovered in recent years, and it has recently shown great potential in the field of membrane biofouling control. At present, D-amino acid is used to control membrane biofouling by adding directly to the system, or directly chemically modifying the membrane ...

Claims

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Application Information

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IPC IPC(8): B01D67/00C02F3/00B01D65/08
CPCB01D65/08B01D67/0093C02F3/00
Inventor 郭晓燕范守港王冲
Owner NANKAI UNIV
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