Method of using carbon nanofiber layer to modify ultrafiltration membrane

A technology of carbon nanofiber and carbon fiber, which is applied in the field of environmental protection water treatment, can solve the problems of membrane pollution hindering the promotion and application of membrane technology, and achieve the effects of easy large-scale use and promotion, simple operation and low operating cost

Inactive Publication Date: 2016-05-11
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Description
  • Claims
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Problems solved by technology

[0002] The application of membrane technology in the field of environmental protection water treatment is becoming more and more extensive, gradually becoming one of the foundations of the world's sustainable development strategy, and playing an increasingly important role in solving ma

Method used

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  • Method of using carbon nanofiber layer to modify ultrafiltration membrane
  • Method of using carbon nanofiber layer to modify ultrafiltration membrane
  • Method of using carbon nanofiber layer to modify ultrafiltration membrane

Examples

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Effect test

Embodiment example 1

[0028] 1), cut the hydrogel-like bacterial cellulose into blocks (about 1*2*1.5cm 3 ), soaked in deionized water for two days, freeze-dried for 48 hours to form an airgel, and calcined at 950°C for 24 hours in an argon atmosphere, and then weighed the load to be 24g / m 2 The calcined bacterial cellulose was wetted with a small amount of deionized water dropwise, ground for 15 minutes, ultrasonically dispersed for 5 minutes, magnetically stirred in 50ml of deionized water for 10 minutes, and the uniformly dispersed bacterial cellulose was pre-deposited on a partial Polyvinyl fluoride ultrafiltration membrane surface.

[0029] 2), add 3 milliliters of 0.5M sodium bicarbonate solution in 300 milliliters of deionized water, then add 1 milliliter of 3g / L BSA stock solution, adjust the pH to 7±0.1 with 0.1M hydrochloric acid solution, the BSA solution 24g / m was pre-deposited in step 1) above 2 The polyvinylidene fluoride ultrafiltration membrane of bacterial cellulose is ultrafilte...

Embodiment example 2

[0031] 1), cut the hydrogel-like bacterial cellulose into blocks (about 1*2*1.5cm 3 ), soaked in deionized water for two days, freeze-dried for 48 hours to form an airgel, and calcined at 950°C for 24 hours in an argon atmosphere, and then weighed the load to be 24g / m 2 The calcined bacterial cellulose was wetted with a small amount of deionized water dropwise, ground for 15 minutes, ultrasonically dispersed for 5 minutes, magnetically stirred in 50ml of deionized water for 10 minutes, and the uniformly dispersed bacterial cellulose was pre-deposited on a partial Polyvinyl fluoride ultrafiltration membrane surface.

[0032] 2), add 3 milliliters of 0.5M sodium bicarbonate solution to 300 milliliters of deionized water, then add 1 milliliter of 3g / L SA stock solution, adjust the pH to 7±0.1 with 0.1M hydrochloric acid solution, and use the SA solution with 24g / m was pre-deposited in the above step 1) 2 The polyvinylidene fluoride ultrafiltration membrane of bacterial cellulos...

Embodiment example 3

[0034] 1), cut the hydrogel-like bacterial cellulose into blocks (about 1*2*1.5cm 3 ), soaked in deionized water for two days, freeze-dried for 48 hours to form an airgel, and calcined at 950°C for 24 hours in an argon atmosphere, and then weighed the load to be 12g / m 2 The calcined bacterial cellulose was wetted with a small amount of ethanol, ground for 15 minutes, ultrasonically dispersed for 5 minutes, then magnetically stirred in a mixture of 35ml ethanol and 15ml N-methylpyrrolidone for 24 hours, and uniformly dispersed by Bacterial cellulose modified with ethanol and N-methylpyrrolidone was pre-deposited on the surface of polyvinylidene fluoride ultrafiltration membrane.

[0035] 2), add 3 milliliters of 0.5M sodium bicarbonate solution in 300 milliliters of deionized water, then add 1 milliliter of 3g / L BSA stock solution, adjust the pH to 7±0.1 with 0.1M hydrochloric acid solution, use the BSA solution 12g / m was pre-deposited in the above step 1) 2 The polyvinyliden...

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Abstract

The invention relates to a method of using a carbon nanofiber layer to modify an ultrafiltration membrane and belongs to the field of environment-friendly water treatment. The method includes: pre-treating carbon fiber to obtain granule-like carbon fiber; ultrasonically dispersing and stirring the granule-like carbon fiber after being pre-treated in a solvent sufficiently, and pre-depositing the carbon nanofiber which is uniformly dispersed on the surface of the ultrafiltration membrane. The carbon nanofiber pre-deposited on the surface of the ultrafiltration membrane is equivalent to a simple coating which preferentially adsorbs pollutants to reduce membrane pollution. The carbon nano fiber pre-deposited on the surface of the ultrafiltration membrane is rich in source, so that operation cost is lowered greatly. The carbon nanofiber pre-deposited on the surface of the ultrafiltration membrane and the ultrafiltration membrane are in physical deposition, so that the carbon nanofiber and the ultrafiltration membrane can be completely removed by using a plastic scraper to slightly scrape and using deionized water to clean after reaction is finished. The method is simple to operate, low in cost and easy in large-scale use and popularization.

Description

technical field [0001] The invention relates to a method for modifying an ultrafiltration membrane by a carbon nanofiber layer, and belongs to the field of environmental protection water treatment. Background technique [0002] The application of membrane technology in the field of environmental protection water treatment is becoming more and more extensive, gradually becoming one of the foundations of the world's sustainable development strategy, and playing an increasingly important role in solving major problems such as global energy resources and the environment. Membrane technology is considered It is one of the most important new technologies in the 21st century. However, membrane fouling is still the main obstacle hindering the popularization and application of membrane technology. In the early days, the main method to reduce membrane fouling was to carry out a pretreatment process on sewage to reduce membrane fouling. The most important and traditional pretreatment p...

Claims

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Application Information

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IPC IPC(8): B01D71/34B01D69/02B01D69/12B01D67/00
CPCB01D71/34B01D67/00B01D69/02B01D69/12B01D2325/40
Inventor 刘婷连元龙孙克宁
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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