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Hollow fiber braided tube filter membrane for reducing sewage as well as preparation method and application of hollow fiber braided tube filter membrane

A fiber braided tube, hollow technology, used in chemical instruments and methods, permeation/dialysis water/sewage treatment, membranes, etc. Effects of salt/dirt performance, large evaporation specific surface area, and high mechanical strength

Active Publication Date: 2022-03-11
江苏巨之澜科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The second purpose of the present invention is to provide a hollow fiber braided tube filter membrane for sewage reduction, which aims to solve the problem of low evaporation efficiency caused by too small specific surface area and poor strength of photothermal evaporation materials in the prior art. The problem of not being able to scale for long-term use

Method used

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  • Hollow fiber braided tube filter membrane for reducing sewage as well as preparation method and application of hollow fiber braided tube filter membrane
  • Hollow fiber braided tube filter membrane for reducing sewage as well as preparation method and application of hollow fiber braided tube filter membrane
  • Hollow fiber braided tube filter membrane for reducing sewage as well as preparation method and application of hollow fiber braided tube filter membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] (1) 10wt% polyvinylidene fluoride, 10wt% tetraethyl orthosilicate, 0.5w% hydrochloric acid and 10.0wt% carbon black were dissolved in N,N-dimethylacetamide at room temperature, and treated by ultrasonic stirring 24h, to obtain a uniform casting solution containing carbon black photothermal material;

[0044] (2) dissolving 10.0 wt% polydimethylsiloxane in n-hexane, stirring mechanically until the solution is clear and transparent to obtain a hydrophobic polydimethylsiloxane polymer dispersion;

[0045] (3) Through the surface traction dip-coating modification technology, the light-to-heat conversion functional material carbon black and the hydrophobic polymer polydimethylsiloxane are sequentially fixed on the outer surface of the polyethylene terephthalate hollow fiber braided tube; Fix at a high temperature of 80°C, wash with water and dry to obtain a hollow fiber braided tube filter membrane for sewage reduction.

[0046] Wherein, step (1) and step (2) are not limite...

Embodiment 2

[0048] (1) 5wt% polysulfone, 2wt% tetrabutyl titanate, 0.2wt% hydrochloric acid and 0.2wt% graphene were dissolved in N-methylpyrrolidone at room temperature, and treated with ultrasonic stirring for 12h to obtain graphene-containing light Homogeneous casting solution for hot materials;

[0049] (2) Dissolving 0.2wt% triethoxyfluorosilane in n-heptane, stirring mechanically until the solution is clear and transparent, to obtain a hydrophobic triethoxyfluorosilane polymer dispersion;

[0050] (3) Through the surface traction dip coating modification technology, the light-to-heat conversion functional material graphene and the hydrophobic polymer triethoxyfluorosilane are sequentially fixed on the outer surface of the polytetrafluoroethylene hollow fiber braided tube; Washing with water and drying to obtain a hollow fiber braided tube filter membrane for waste water reduction.

[0051] Wherein, step (1) and step (2) are not limited in sequence.

Embodiment 3

[0053] (1) 20wt% polyethersulfone, 17wt% tetraethyl orthosilicate, 1.0wt% hydrochloric acid and 20wt% reduced graphene oxide were dissolved in N,N-dimethylformamide at room temperature, and treated by ultrasonic stirring 48h, obtain the homogeneous casting liquid that contains graphene photothermal material;

[0054] (2) 20 wt% tridecafluorooctyltrimethoxysilane was dissolved in n-heptane, and mechanically stirred until the solution was clear and transparent to obtain a hydrophobic tridecafluorooctyltrimethoxysilane polymer dispersion;

[0055] (3) Through the surface traction dip coating modification technology, the photothermal conversion functional material reduced graphene oxide and the hydrophobic polymer tridecafluorooctyltrimethoxysilane are sequentially fixed on the outer surface of the nylon hollow fiber braided tube; Fixing, washing with water and drying to obtain a hollow fiber braided tube filter membrane for waste water reduction.

[0056] Wherein, step (1) and s...

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Abstract

The invention provides a hollow fiber braided tube filter membrane for reducing sewage as well as a preparation method and application of the hollow fiber braided tube filter membrane. The hollow fiber braided tube filter membrane for sewage reduction comprises an internal high-strength hollow fiber braided tube and a photo-thermal polymer layer attached to the outer surface of the braided tube, wherein the photo-thermal polymer layer comprises a loose spongy pore inner polymer layer and an outer hydrophobic layer attached to the surface of a polymer. According to the prepared hollow fiber braided tube filter membrane for sewage reduction based on braided tube support and having a loose hydrophilic network structure and a hydrophobic external structure, the hydrophilic network is beneficial to water molecule transmission, the outer hydrophobic layer is beneficial to water vapor escape and salt / pollution resistance, and the hollow fiber braided tube filter membrane is a novel membrane for sewage reduction through photo-thermal evaporation; the membrane can be applied to various complex and difficult-to-purify sewage such as pharmaceutical wastewater, organic solvent evaporation, chemical wastewater, reverse osmosis concentrated wastewater, garbage penetrating fluid wastewater, sludge reduction extrusion concentrated wastewater and the like, and can realize all-weather membrane evaporation reduction and zero emission in a natural environment.

Description

Technical field [0001] The invention relates to the technical field of polymer membranes, and in particular to a hollow fiber braided tube filter membrane for sewage reduction and its preparation method and application. Background technique [0002] With the rapid development of our country in the past 30 years, pollutants in wastewater such as salts, drugs, heavy metals, textile dyes, solvents, etc. are directly discharged without treatment, causing large-scale pollution of lakes, rivers and even groundwater, resulting in serious water resource problems. The crisis threatens the physical and mental health of the people and has a huge social impact. [0003] At this stage, commonly used wastewater concentration treatment methods include: membrane separation and concentration technology based on ultrafiltration membrane concentration, nanofiltration membrane concentration and reverse osmosis concentration, as well as membrane distillation and concentration technology. Howeve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D67/00B01D69/10B01D69/12B01D69/08B01D63/06C02F1/44B01D61/36
CPCB01D69/10B01D69/125B01D69/08B01D63/062C02F1/44B01D61/36B01D61/368B01D2325/30
Inventor 张晓红张清程
Owner 江苏巨之澜科技有限公司
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