Graphene modified hollow fiber membrane and preparation method thereof

A technology of graphene modification and fiber membrane, which is applied in the field of fiber membrane to improve surface performance, promote the development of water treatment technology, and improve the effect of chemical cleaning resistance

Active Publication Date: 2016-07-27
四川久润环保科技有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to design a graphene-modified hollow fiber membrane and its preparation method in view of the technical problems existing in the existing common hollow fiber membrane in the process of oily wastewater treatment. Fiber membranes are blended and modified to achieve a good combination of inorganic components and organic components, and to obtain membrane materials that have both the advantages of inorganic membranes and organic membranes, improve the comprehensive performance of hollow fiber membranes, improve the surface properties of membrane materials, and improve The mechanical properties of the membrane material can effectively solve the problem of limited application of hollow fiber membranes in the treatment of oily wastewater, save the process of pretreatment of oily water quality, and save treatment costs; good alkali resistance, improve the chemical cleaning resistance of membrane filaments, and improve Membrane life, promoting the development of water treatment technology based on modified hollow fiber membranes

Method used

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  • Graphene modified hollow fiber membrane and preparation method thereof
  • Graphene modified hollow fiber membrane and preparation method thereof
  • Graphene modified hollow fiber membrane and preparation method thereof

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preparation example Construction

[0056] A kind of preparation method of graphene modified hollow fiber membrane is characterized in that, comprises the following steps:

[0057] Step 1) Preparation of casting solution:

[0058] Premix, according to the mass percentage of the formula, add polyvinylidene fluoride resin 1~30wt%, hydrophilic modified resin 0.1~5wt%, graphene additive 1~2wt%, put it into the high mixer after weighing, and mix it at low speed for 30 seconds Then turn to high mixing for 1 minute, after standing still for 5 minutes, then add coupling agent 0.5~1.0wt%, turn to high mixing for 1 minute after low mixing for 30 seconds, high mixing spindle speed 1400rpm, let stand for 5 minutes and release the premix ;

[0059] Add solvent to dissolve, first add 2 / 3 of the solvent to the melting pot with a constant temperature of 70±5°C, start stirring, then add the above premix at a uniform speed, then add the remaining 1 / 3 of the solvent, stir and dissolve at a speed of 25-50rpm 8 to 10 hours;

[00...

Embodiment 1

[0072] According to formula mass percentage, polyvinylidene fluoride resin 17wt%, hydrophilic modified resin 0.5wt%, graphene additive 2wt%, wherein, graphene additive is made of graphene powder 35wt%, nano calcium carbonate 50wt%, colloidal silicon 5wt% , 10wt% antistatic agent, the antistatic agent is selected as 10% sodium chloride aqueous solution; after measuring, put it into the high mixer, mix at low speed for 30 seconds, then turn to high mixing for 1 minute, and after standing for 5 minutes, add 0.5 Wt% coupling agent γ-aminopropyltriethoxysilane KH550, mix at low speed for 30 seconds, then turn to high mixing for 1 minute, high mixing spindle speed 1400rpm, let stand for 5 minutes and release the premix; add 80wt% solvent To dissolve, when dissolving, first add 2 / 3 of the solvent to the melting pot with a constant temperature of 70±5°C, start stirring, then add the above premix at a uniform speed, and then add the remaining 1 / 3 of the solvent at a speed of 25-50rpm S...

Embodiment 2

[0075] According to formula mass percentage, polyvinylidene fluoride resin 17wt%, hydrophilic modified resin 0.5wt%, graphene additive 2wt%, wherein, graphene additive is made of graphene powder 33wt%, nano calcium carbonate 53wt%, colloidal silicon 7wt% , composed of 7wt% antistatic agent, the antistatic agent is selected as 10% sodium acetate aqueous solution; after measuring, put it into the high mixer, mix at low speed for 30 seconds, then turn to high mixing for 1 minute, and after standing for 5 minutes, add 0.5wt % of the coupling agent γ-aminopropyltriethoxysilane KH550, after 30 seconds of low mixing, turn to high mixing for 1 minute, high mixing spindle speed 1400rpm, let stand for 5 minutes and release the premix; add 80wt% solvent for Dissolving, when dissolving, first add 2 / 3 of the solvent to the melting pot with a constant temperature of 70±5°C, start stirring, then add the above premix at a uniform speed, then add the remaining 1 / 3 of the solvent, and stir at a ...

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Abstract

The invention relates to a graphene modified hollow fiber membrane, which is prepared from the following raw materials in percentage by weight: 1%-30% of polyvinylidene fluoride resin, 0.1%-5% of hydrophilic modified resin, 1%-2% of a graphene additive, 0.5%-1.0% of a coupling agent and 60%-80% of a solvent. The invention further provides a preparation method of the graphene modified hollow fiber membrane. By the prepared graphene modified hollow fiber membrane, good combination of inorganic components and organic components is achieved, and thus the graphene modified hollow fiber membrane is a membrane material with the advantages of an inorganic membrane and an organic membrane; the surface property and the mechanical property of the membrane material are improved; the problem of application limitation of a hollow fiber membrane during oily wastewater treatment is effectively solved; the procedure of pretreatment of oily water is omitted, and the treatment cost is reduced; the alkali resistance is good; the chemical cleaning resistance of a membrane filament is improved; and the service life of the membrane is prolonged.

Description

technical field [0001] The invention relates to the technical field of fiber membranes, in particular to a graphene-modified hollow fiber membrane and a preparation method thereof. Background technique [0002] Water treatment technology based on membrane technology has become one of the most promising treatment technologies in the field of water treatment due to the advantages of no need for additional chemicals, small equipment footprint, no secondary pollution, and easy automation. Most of the existing water treatment technologies based on membrane technology mainly rely on ordinary hollow fiber membranes. [0003] Due to structural and design defects, ordinary hollow fiber membranes have the following technical defects in the treatment of oily wastewater: when the water contains oil, as the filtration progresses, the oil components will widely cover the surface of the membrane, and then block the micropores, resulting in serious membrane flux. decline, and even affect t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/34B01D69/08B01D67/00C02F1/44C02F1/40
CPCB01D67/0002B01D69/08B01D71/021B01D71/34B01D2325/30C02F1/40C02F1/44
Inventor 高飞刘岩田满红黄卫东郝巍罗明仁宋宝增
Owner 四川久润环保科技有限公司
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