Oxidized graphene metal/metallic oxide nanoparticle modified hollow fiber ultrafiltration membrane, and preparation method thereof

A technology of nano-particles and oxides, applied in chemical instruments and methods, ultrafiltration, membrane technology, etc., can solve the problems of shortening the service life of the membrane, polluting the filtered water body, and easy to fall off the membrane body, etc., to achieve large water flux, pro- Strong water and good hydrophilic effect

Inactive Publication Date: 2016-01-13
SANDA FILM SCI & TECH XIAMEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, metal / metal oxide nanoparticles are easy to agglomerate and cannot be well dispersed in the membrane material, and during the long-term use of the membrane, the metal / metal oxide nanoparticles are easy to fall off the membrane body, pollute the filtered water, and shorten the use of the membrane. Lifespan, these are the problems to be solved
At present, there is no method that can well combine metal / metal oxide nanoparticles on hollow fiber ultrafiltration membranes.

Method used

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  • Oxidized graphene metal/metallic oxide nanoparticle modified hollow fiber ultrafiltration membrane, and preparation method thereof
  • Oxidized graphene metal/metallic oxide nanoparticle modified hollow fiber ultrafiltration membrane, and preparation method thereof
  • Oxidized graphene metal/metallic oxide nanoparticle modified hollow fiber ultrafiltration membrane, and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] 1) Mix 1 part of graphene oxide, 0.001 part of silver nanoparticles, and 200 parts of water-methanol mixture with a first solvent volume ratio of 1:1, and ultrasonically disperse to obtain a graphene oxide silver nanoparticle dispersion;

[0031] 2) 10 parts of high molecular polymer membrane material polyvinylidene fluoride, 30 parts of porogen lithium nitrate, 59.9 parts of second solvent dimethylformamide, and 0.1 part of graphene oxide silver nanoparticle dispersion were uniformly mixed to obtain cast Membrane fluid;

[0032] 3) Leave the casting solution to defoam for 24 hours and then extrude the core solution from the spinning nozzle at the same time. The temperature of the spinning nozzle is 50°C. The casting solution passes through the air at a speed of 0.5m / min and then enters the coagulation bath, stay in the coagulation bath for 3s, take it out, and obtain a hollow fiber ultrafiltration membrane 1 modified by graphene oxide silver nanoparticles; place it in ...

Embodiment 2

[0040] 1) 1 part of graphene oxide, 3 parts of copper nanoparticles, and 10 parts of the first solvent ethanol are mixed and ultrasonically dispersed to obtain a dispersion of graphene oxide copper nanoparticles;

[0041] 2) 10 parts of polymer film material polyvinyl chloride, 5 parts of porogen sodium chloride, 70 parts of second solvent dimethylacetamide, and 15 parts of graphene oxide copper nanoparticle dispersion are uniformly mixed to obtain a casting Membrane fluid;

[0042] 3) Leave the casting solution to defoam for 24 hours and extrude the core solution from the spinning nozzle at the same time. The temperature of the spinning nozzle is 90°C. The casting solution passes through a distance of 5mm at a speed of 3m / min in the air and then solidifies. bath, stay in the coagulation bath for 20s, take it out, and obtain the hollow fiber ultrafiltration membrane 2 modified by graphene oxide copper nanoparticles; place it in an aqueous solution for rinsing for 24 hours, and...

Embodiment 3

[0047] 1) 1 part of graphene oxide, 3 parts of gold nanoparticles, and 200 parts of the first solvent acetone are mixed and ultrasonically dispersed to obtain a graphene oxide gold nanoparticle dispersion;

[0048] 2) 30 parts of polymer membrane material polysulfone, 3 parts of porogen calcium chloride and 2 parts of calcium nitrate, 55 parts of second solvent dimethyl sulfoxide, and 10 parts of graphene oxide gold nanoparticle dispersion are uniform Mix to obtain casting solution;

[0049] 3) Leave the casting solution to defoam for 24 hours and extrude the core solution from the spinning nozzle at the same time. The temperature of the spinning nozzle is 90°C. The casting solution passes through a distance of 50mm at a speed of 3m / min in the air and then solidifies. bath, stay in the coagulation bath for 15s, take it out, and obtain a hollow fiber ultrafiltration membrane 3 modified by graphene oxide gold nanoparticles; place it in an aqueous solution for rinsing for 24 hour...

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Abstract

The invention discloses an oxidized graphene metal/metallic oxide nanoparticle modified hollow fiber ultrafiltration membrane, and a preparation method thereof. According to the preparation method, anchoring of metal/metallic oxide nanoparticles on oxidized graphene is carried out; an obtained oxidized graphene dispersion liquid loaded with the metal/metallic oxide nanoparticles is added into a membrane material, and a membrane casting solution is obtained via mixing; the membrane casting solution is subjected to weaving so as to obtain the oxidized graphene metal/metallic oxide nanoparticle doped hollow fiber ultrafiltration membrane. Mechanical strength, water flux, retention rate, hydrophilic performance, pollution resistance, and service life of the hollow fiber ultrafiltration membrane are improved obviously; the preparation method is simple; operation is convenient; and repeatability is high.

Description

technical field [0001] The invention relates to a hollow fiber ultrafiltration membrane modified by graphene oxide metal / metal oxide nanoparticles and a preparation method thereof. Background technique [0002] Polymer hollow fiber ultrafiltration membranes have been widely used in drinking water purification, industrial sewage treatment, seawater desalination, municipal sewage, reclaimed water recycling, and biomedical fields in recent years due to their advantages such as high specific surface area and easy packaging. At present, polymers such as polysulfone, polyethersulfone, and polyvinylidene fluoride are selected as the most commonly used ultrafiltration membranes due to their excellent mechanical strength, chemical stability, radiation resistance, heat resistance, and ease of processing. Material. However, due to the hydrophobic properties of these membrane materials, the anti-pollution and water flux of most membranes are not ideal, which cannot meet the needs of in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/34B01D71/30B01D71/68B01D71/26B01D71/42B01D71/38B01D67/00B01D69/08B01D61/14
Inventor 张弘弢洪昱斌陈慧英吕莉傅祖显蓝伟光
Owner SANDA FILM SCI & TECH XIAMEN
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