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Porous high-permeability polyethylene sewage treatment membrane and preparation method thereof

A sewage treatment, high permeability technology, applied in the direction of osmosis/dialysis water/sewage treatment, water/sludge/sewage treatment, ion exchange water/sewage treatment, etc. Permeability and other issues

Active Publication Date: 2021-08-20
JIANGSU HORIZON NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Polymer films represented by polyethylene films often have the advantages of high mechanical strength, chemical resistance, and impact resistance, so they are the most widely used. However, due to the low surface energy of polyethylene films, the interaction between them and water The ability to act is weak, and the hydrophobicity also makes the polyethylene membrane susceptible to pollution by protein, macromolecular organic matter, oil, etc., and the particles in the sewage are easy to gather on the surface of the polyethylene membrane and the membrane pores, causing continuous pollution, thereby reducing The permeability of the membrane is restricted, which restricts the development of sewage treatment membrane technology

Method used

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  • Porous high-permeability polyethylene sewage treatment membrane and preparation method thereof
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Effect test

Embodiment 1

[0025] A method for preparing a porous high-permeability polyethylene sewage treatment membrane, comprising the following steps;

[0026] (1) Preparation of modified polyethylene: melt the polyethylene masterbatch at a temperature of 280°C, pretreat with excess oxygen for 0.5h, add tannic acid, phosphoric acid-L-tyrosine disodium salt, Stir evenly, under nitrogen atmosphere, raise the temperature to 105°C, react for 4h, raise the temperature to 115°C, age for 0.5h, wash with ethanol and deionized water in turn to obtain modified polyethylene; polyethylene masterbatch, phosphoric acid- The mass ratio of L-tyrosine disodium salt to tannic acid is 5:0.5:2;

[0027] (2) Preparation of nanocomposites: adding tetrabutyl titanate into acetonitrile, stirring to prepare tetrabutyl titanate solution; adding polystyrene nanospheres into acetonitrile, stirring evenly to obtain suspension A; 30wt.% ammonia water, deionized water, and tetrabutyl titanate were added to the suspension A, sti...

Embodiment 2

[0033] A method for preparing a porous high-permeability polyethylene sewage treatment membrane, comprising the following steps;

[0034] (1) Preparation of modified polyethylene: melt the polyethylene masterbatch at a temperature of 297°C, pretreat with excess oxygen for 0.7h, add tannic acid, phosphoric acid-L-tyrosine disodium salt, Stir evenly, under nitrogen atmosphere, raise the temperature to 107°C, react for 4.5h, raise the temperature to 119°C, age for 0.7h, wash with ethanol and deionized water in turn to obtain modified polyethylene; polyethylene masterbatch, phosphoric acid -The mass ratio of L-tyrosine disodium salt to tannic acid is 5:0.6:2;

[0035](2) Preparation of nanocomposites: adding tetrabutyl titanate into acetonitrile, stirring to prepare tetrabutyl titanate solution; adding polystyrene nanospheres into acetonitrile, stirring evenly to obtain suspension A; Add 33wt.% ammonia water, deionized water, and tetrabutyl titanate to the suspension A, stir for ...

Embodiment 3

[0041] A method for preparing a porous high-permeability polyethylene sewage treatment membrane, comprising the following steps;

[0042] (1) Preparation of modified polyethylene: Melt the polyethylene masterbatch at a temperature of 320°C, pretreat with excess oxygen for 1 hour, add tannic acid, phosphoric acid-L-tyrosine disodium salt, and stir Uniform, under nitrogen atmosphere, heated up to 115°C, reacted for 6 hours, raised the temperature to 125°C, aged for 1 hour, and washed with ethanol and deionized water in turn to obtain modified polyethylene; polyethylene masterbatch, phosphoric acid-L- The mass ratio of tyrosine disodium salt to tannic acid is 5:0.7:2;

[0043] (2) Preparation of nanocomposites: adding tetrabutyl titanate into acetonitrile, stirring to prepare tetrabutyl titanate solution; adding polystyrene nanospheres into acetonitrile, stirring evenly to obtain suspension A; Add 40wt.% ammonia water, deionized water, and tetrabutyl titanate to the suspension A...

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Abstract

The invention discloses a porous high-permeability polyethylene sewage treatment membrane and a preparation method thereof. The sewage treatment membrane is prepared from the following raw materials in parts by weight: 70 to 80 parts of modified polyethylene, 20 to 25 parts of a nano-compound, 0.5 to 1 part of an antioxidant and 1 to 3 parts of a pore-foaming agent, wherein the modified polyethylene is mainly prepared from polyethylene master batch, phosphoric acid-L-tyrosine disodium salt and tannic acid through a reaction; a mass ratio of the polyethylene master batch to the phosphoric acid-L-tyrosine disodium salt to the tannic acid is 5: 0.5 to 0.7: 2; and the nano-compound is mainly prepared from tetrabutyl titanate, L-cysteine S-sodium sulfate sesquihydrate and sodium perfluorobutanesulfonate through a reaction. In the process of preparing the sewage treatment membrane, amino acid derivatives, namely the phosphoric acid-L-tyrosine disodium salt and L-cysteine S-sodium sulfate sesquihydrate are used, so the retention rate of the membrane on protein substances in water is greatly increased, the blockage of pore channels in the membrane is avoided, and the permeation flux of the porous membrane is improved.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a porous high-permeability polyethylene sewage treatment membrane and a preparation method thereof. Background technique [0002] At present, sewage treatment membrane technology has become an emerging technology in water treatment technology, and has become a research hotspot for technicians in the field of sewage treatment technology. Sewage treatment membrane technology plays a significant role in ensuring the safety of drinking water, industrial sewage treatment, and reducing environmental pollution. Compared with traditional water treatment technology, sewage treatment membrane technology does not produce a large amount of sludge and solid waste, and has strong applicability. The device has simple composition, fast and convenient installation, high separation efficiency and low energy consumption, so it has attracted more and more attention from people. So far, sew...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D67/00B01D69/02B01D71/26C02F1/42C02F1/44C02F101/20
CPCB01D71/26B01D67/0079B01D69/02C02F1/44C02F1/42B01D2325/36B01D2325/10B01D2325/42C02F2101/20Y02W10/10
Inventor 翁星星刘涛涛沈亚定
Owner JIANGSU HORIZON NEW ENERGY TECH CO LTD