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Cellulose acetate-based ultrafiltration membrane for separating anionic dye from heavy metal and preparation method of cellulose acetate-based ultrafiltration membrane

A cellulose acetate, anionic dye technology, applied in chemical instruments and methods, ultrafiltration, semi-permeable membrane separation, etc., can solve the problems of pollution, reduction, inability to clean for a long time, etc., to improve the retention rate, high efficiency, Good market application prospects and the effect of industrialized production value

Active Publication Date: 2017-09-15
BEIJING INSTITUTE OF TECHNOLOGYGY +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

CA membrane materials can be used in the field of wastewater treatment. For example, Alka G et al. prepared N,O-carboxymethyl chitosan / CA composite membranes and applied them in water treatment. However, CA-based membrane materials have relatively different structures. Thick and dense cortex, easy to be polluted by external pollutants during the membrane separation process, and can not be cleaned for a long time, resulting in a decrease in the efficiency of the membrane separation process

Method used

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  • Cellulose acetate-based ultrafiltration membrane for separating anionic dye from heavy metal and preparation method of cellulose acetate-based ultrafiltration membrane
  • Cellulose acetate-based ultrafiltration membrane for separating anionic dye from heavy metal and preparation method of cellulose acetate-based ultrafiltration membrane
  • Cellulose acetate-based ultrafiltration membrane for separating anionic dye from heavy metal and preparation method of cellulose acetate-based ultrafiltration membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Take 10.00g of HNTs and add 40.00g of HNTs with a mass fraction of 10% hydrochloric acid, stir magnetically for 6 hours at 25°C, wash the acid-washed HNTs with a large amount of deionized water, and centrifuge until the supernatant is neutral, then Place the washed HNTs in a vacuum drying oven at 110°C for 24 hours to obtain dried HNTs; weigh 3.0 g of dried HNTs and add 6.0 ml of N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane and 100ml of toluene mixed solution, refluxed at 110°C for 24h, after the reaction, the modified HNTs was washed with a large amount of deionized water and ethanol by centrifugation repeatedly to wash off the unreacted N-β-(aminoethyl)- γ-Aminopropyltrimethoxysilane, after washing with water, place the solid in a vacuum oven at 80°C for 12 hours to obtain N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane modified HNTs, denoted as KHNTs.

[0035] Weigh 0.04g of the obtained KHNTs and dissolve in 16.0g of dimethylacetamide, ultrasonically treat for 30m...

Embodiment 2

[0039] Take 10.00g of HNTs and add 40.00g of HNTs with a mass fraction of 10% hydrochloric acid, stir magnetically for 6 hours at 25°C, wash the acid-washed HNTs with a large amount of deionized water, and centrifuge until the supernatant is neutral, then Place the washed HNTs in a vacuum drying oven at 110°C for 24 hours to obtain dried HNTs; weigh 3.00 g of dried HNTs and add 6.00 ml of N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane and 100ml of toluene mixed solution, refluxed at 110°C for 24h, after the reaction, the modified HNTs was washed with a large amount of deionized water and ethanol by centrifugation repeatedly to wash off the unreacted N-β-(aminoethyl)- γ-Aminopropyltrimethoxysilane, after washing with water, place the solid in a vacuum oven at 80°C for 12 hours to obtain N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane modified HNTs, denoted as KHNTs.

[0040] Weigh 0.08g of the obtained KHNTs and dissolve in 16.00g of dimethylacetamide, ultrasonically treat for ...

Embodiment 3

[0044] Take 10.00g of HNTs and add 40.00g of HNTs with a mass fraction of 10% hydrochloric acid, stir magnetically for 6 hours at 25°C, wash the acid-washed HNTs with a large amount of deionized water, and centrifuge until the supernatant is neutral, then Place the washed HNTs in a vacuum drying oven at 110°C for 24 hours to obtain dried HNTs; weigh 3.00 g of dried HNTs and add 6.00 ml of N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane and 100ml of toluene mixed solution, refluxed at 110°C for 24h, after the reaction, the modified HNTs was washed with a large amount of deionized water and ethanol by centrifugation repeatedly to wash off the unreacted N-β-(aminoethyl)- γ-Aminopropyltrimethoxysilane, after washing with water, place the solid in a vacuum oven at 80°C for 12 hours to obtain N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane modified HNTs, denoted as KHNTs.

[0045] Weigh 0.12g of the prepared KHNTs and dissolve in 16.00g of dimethylacetamide, ultrasonically treat for ...

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Abstract

The invention discloses a cellulose acetate-based ultrafiltration membrane for separating an anionic dye from a heavy metal and a preparation method of the cellulose acetate-based ultrafiltration membrane. The cellulose acetate-based ultrafiltration membrane for separating the anionic dye from the heavy metal comprises the following components: a halloysite nanotube and cellulose acetate, wherein the halloysite nanotube is grafted with N-beta-(aminoethyl)-gamma-amino propyl trimethoxy silane. The cellulose acetate-based ultrafiltration membrane is prepared by blending the halloysite nanotube of the N-beta-(aminoethyl)-gamma-amino propyl trimethoxy silane and cellulose acetate, so that the excellent quality of the halloysite nanotube and the cellulose acetate can be organically and effectively combined; and the modified cellulose acetate-based ultrafiltration membrane can be further marketed by using the advantage of relatively low price of the halloysite nanotube. The cellulose acetate-based ultrafiltration membrane prepared through the method has an excellent market application prospect and industrial production value.

Description

technical field [0001] The invention relates to the technical field of membrane separation wastewater treatment, in particular to a cellulose acetate-based ultrafiltration membrane for separating anionic dyes and heavy metals and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of industry and the rapid growth of population, people have released more and more wastes into the environment, such as air pollution, water pollution, noise pollution, among which water pollution needs our attention especially. Because water resources are directly related to our daily production, life and health. The main sources of water pollution are the following: papermaking, printing, textile waste water, waste water in food engineering, etc. These pollutions pose a great threat to the safety of water resources. If water pollution is allowed to develop, it will cause human consumption. The water drops sharply, and even the ecological balanc...

Claims

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Application Information

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IPC IPC(8): B01D71/16B01D67/00B01D61/14C02F1/44
CPCB01D61/145B01D67/0079B01D71/16B01D2325/24C02F1/444
Inventor 张大伦穆可广邵自强李友琦陈静王烁刘建新叶正青冯槐宇谢莹张成菊杜琨
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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