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Oil-stain-resistant oil-water separation composite membrane and preparation method thereof

An oil-water separation and composite membrane technology, applied in the field of membrane materials, can solve problems such as normal separation and membrane blockage.

Active Publication Date: 2021-08-31
HANGZHOU NAXI ECOLOGICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Kitchen waste mainly includes leftovers, vegetable stalks and leaves, meat viscera, fruit shells and melon skins, etc. Therefore, the waste water generated by perishable waste contains a large amount of oil, and the commonly used polymer membranes and ceramic membranes are easily affected by the oil in the oil-water mixture. Membrane clogging caused by pollution, thus affecting the normal separation

Method used

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  • Oil-stain-resistant oil-water separation composite membrane and preparation method thereof
  • Oil-stain-resistant oil-water separation composite membrane and preparation method thereof
  • Oil-stain-resistant oil-water separation composite membrane and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0052] Embodiment 1: A kind of anti-oil pollution oil-water separation composite membrane:

[0053] This embodiment provides a composite membrane for oil-stain-resistant oil-water separation, comprising: a composite material composed of a 380-purpose polyamide mesh support layer, poly(vinylidene fluoride-sodium allyl sulfonate), and citraconic anhydride-modified shell powder layer;

[0054] The oil-stain-resistant oil-water separation composite membrane is specifically prepared by the following method:

[0055] 1) Under oxygen-limited conditions, calcinate shells at 220°C for 10 minutes, heat up to 480°C for 15 minutes at a rate of 10°C / min, then heat up to 680°C for 10 minutes, cool down to 550°C within 10 minutes, and then cool naturally to room temperature , crushed to get shell powder; 10g shell powder was treated with microwave for 10min, the microwave power was 500W, and then added in 300g of ethanol, the mass fraction of ethanol solution was 40%, at a frequency of 20kH...

Embodiment 2

[0060] Embodiment 2: Another kind of anti-oil pollution oil-water separation composite membrane:

[0061] This embodiment provides another oil-stain-resistant oil-water separation composite membrane, including: a 380-purpose polyamide screen support layer and a composite material layer composed of poly(vinylidene fluoride-sodium allyl sulfonate) and shell powder;

[0062] The oil-stain-resistant oil-water separation composite membrane is specifically prepared by the following method:

[0063] 1) The preparation of poly(vinylidene fluoride-sodium allyl sulfonate) is the same as step 2) of Example 1;

[0064] 2) the preparation of polyamide screen mesh is identical with the step 3 of embodiment 1);

[0065] 3) The preparation of the dip coating solution is basically the same as step 4) of Example 1, the difference is that shell powder is used instead of citraconic anhydride modified shell powder;

[0066] 4) The dip-coating method of the polyamide screen is the same as step 5)...

Embodiment 3

[0067] Embodiment 3: another kind of anti-oil pollution oil-water separation composite membrane:

[0068] This embodiment provides another kind of oil-stain-resistant oil-water separation composite membrane, comprising: 380 mesh polyamide mesh support layer and poly(vinylidene fluoride-sodium allyl sulfonate), γ-aminopropyl triethoxysilane Composite material layer composed of modified shell powder;

[0069] The oil-stain-resistant oil-water separation composite membrane is specifically prepared by the following method:

[0070] 1) Under oxygen-limited conditions, calcinate shells at 220°C for 10 minutes, heat up to 480°C for 15 minutes at a rate of 10°C / min, then heat up to 680°C for 10 minutes, cool down to 550°C within 10 minutes, and then cool naturally to room temperature , crushed to get shell powder; 10g shell powder was treated with microwave for 10min, the microwave power was 500W, and then added in 300g of ethanol, the mass fraction of ethanol solution was 40%, at a ...

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Abstract

The invention belongs to the technical field of membrane materials, and particularly relates to an oil-stain-resistant oil-water separation composite membrane and a preparation method thereof. According to the oil-stain-resistant oil-water separation composite membrane and the preparation method thereof, a polyamide screen is used as a supporting layer, poly(vinylidene fluoride-sodium allysulfonate) and citraconic anhydride modified shell powder are used a composite material layer, the preparation method is simple, and the prepared oil-stain-resistant oil-water separation composite membrane not only has super-hydrophilic and underwater super-oleophobic properties, but also can perform oil-water separation effectively, has a high separation efficiency, and is suitable for being applied to treatment of oil-containing sewage; and the mechanical strength is high, the adhesive force between the composite material layer and the supporting body is high, the durability is good, the anti-pollution performance and chlorine resistance are excellent, and the service life is long.

Description

technical field [0001] The invention belongs to the technical field of membrane materials, and in particular relates to an oil-pollution-resistant oil-water separation composite membrane and a preparation method thereof. Background technique [0002] With the rapid development of my country's social economy and the acceleration of urbanization, the output of urban domestic waste continues to increase. According to the statistics of the Ministry of Housing and Urban-Rural Development, the annual production of domestic waste in my country is more than 400 million tons, and it is growing at an average annual rate of 10%. It ranks first in the world, and kitchen waste accounts for about half of domestic waste. At present, the treatment of food waste mainly includes landfill, incineration, composting and high-temperature anaerobic digestion. Although landfilling, incineration and composting are relatively simple to deal with, they are easy to cause damage to soil, water and air. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/12B01D69/10B01D67/00B01D69/02C02F1/40C02F1/44
CPCB01D69/12B01D69/10B01D67/0079B01D69/02C02F1/44C02F1/40Y02W10/10
Inventor 徐坚麟付源张一明
Owner HANGZHOU NAXI ECOLOGICAL TECH CO LTD