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Nanofiber membrane, preparation method and application of nanofiber membrane in dye wastewater treatment

A nanofiber membrane, cellulose acetate technology, applied in water/sewage treatment, adsorbed water/sewage treatment, water/sludge/sewage treatment, etc., to achieve the effects of low production cost, high production efficiency, and excellent alkali resistance

Inactive Publication Date: 2021-03-02
嘉兴市爵拓科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these methods can achieve treatment effects to varying degrees, they have their own advantages and disadvantages.

Method used

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  • Nanofiber membrane, preparation method and application of nanofiber membrane in dye wastewater treatment
  • Nanofiber membrane, preparation method and application of nanofiber membrane in dye wastewater treatment
  • Nanofiber membrane, preparation method and application of nanofiber membrane in dye wastewater treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Embodiment 1: a kind of nanofibrous film:

[0065] This embodiment provides a method for preparing a nanofibrous membrane, which specifically includes the following steps:

[0066] 1) Preparation of cellulose acetate / β-cyclodextrin graft copolymer:

[0067] 1.1) Mix 1Kg of cellulose diacetate and 3.5Kg of maleic anhydride, ball mill for 20 minutes to mix evenly, pass in nitrogen, keep warm at 150°C for 15 minutes, cool down to 130°C, stir and react at 300r / min for 2h, add 40g of Stannous octoate, nitrogen gas under normal pressure, continue to react for 3 hours, then add 10Kg of dimethyl sulfoxide, stir to make it completely dissolved, precipitate with excess ice methanol, let it stand for 3 hours, filter with suction, and extract the product with toluene for 24 hours , and then washed 5 times with methanol and suction filtered to obtain carboxylated cellulose diacetate;

[0068] 1.2) Add 1Kg of carboxylated cellulose diacetate to 8Kg of dimethyl sulfoxide, stir and d...

Embodiment 2

[0078] Example 2: Another nanofibrous membrane:

[0079] This example provides another nanofiber membrane, the preparation method is basically the same as Example 1, the difference is that in the step 1.2) of preparing cellulose acetate / β-cyclodextrin graft copolymer in this example, β- The amount of cyclodextrin added is 200g, that is, the weight ratio of carboxylated cellulose diacetate to β-cyclodextrin is 1:0.2.

Embodiment 3

[0080] Example 3: Another nanofibrous membrane:

[0081] This example provides another nanofiber membrane, the preparation method is basically the same as Example 1, the difference is that in the step 1.2) of preparing cellulose acetate / β-cyclodextrin graft copolymer in this example, the β-cyclodextrin The amount of dextrin added is 400g, that is, the weight ratio of carboxylated cellulose diacetate to β-cyclodextrin is 1:0.4.

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Abstract

The invention relates to the technical field of textile wastewater treatment, in particular to a nanofiber membrane, a preparation method and application of the nanofiber membrane in dye wastewater treatment. The nanofiber membrane is prepared by taking cellulose acetate as a main membrane material through an electrostatic spinning method, the nanofiber membrane is high in porosity and large in specific surface area, a large number of amino and carboxyl active groups are exposed on the surface of the nanofiber membrane, toxic and refractory water-soluble substances in dye wastewater can be adsorbed, and the nanofiber membrane still has a relatively high dye adsorption rate in a high-temperature environment, and has excellent mechanical properties and alkali resistance.

Description

technical field [0001] The invention relates to the technical field of textile wastewater treatment, in particular to a nanofiber membrane, a preparation method and its application in dye wastewater treatment. Background technique [0002] With the development of dye production and printing and dyeing industry, the discharge of dye industry wastewater has increased sharply. According to the survey, the discharge of printing and dyeing wastewater in my country accounts for 21% of the total annual sewage discharge, up to 64 billion tons. It is one of the main sources of sewage in my country. one. The organic matter in dye wastewater is mostly based on aromatic groups such as benzene, naphthalene, anthracene, and quinone. The color is very dark, and the chroma is as high as 500,000 to 5 million. Toxicity, especially the azo dyes have carcinogenic effects on organisms, and affect the growth and reproduction of aquatic organisms, and have obvious toxic effects on the nervous and ...

Claims

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Application Information

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IPC IPC(8): B01D71/16B01D69/02B01D67/00C02F1/28C02F1/44C02F101/22C02F101/30
CPCB01D67/0079B01D69/02B01D71/024B01D71/16B01D2323/39B01D2325/12B01D2325/30C02F1/288C02F1/44C02F2101/22C02F2101/308
Inventor 范玉柱马鹏辉
Owner 嘉兴市爵拓科技有限公司