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Anisyl alcohol solvent-resistant composite nano-filtration membrane and method for preparing same

A composite nanofiltration membrane and anisol technology, which is applied in the field of composite membranes, can solve the problems of difficulty in increasing the permeate flux by a large margin, and achieve the effects of improving the membrane flux, being easy to implement, and having good solvent resistance.

Active Publication Date: 2019-02-19
CHUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the separation performance of solvent-resistant nanofiltration membranes needs to be further improved. Existing commercial membranes can already have a large flux and rejection rate in water systems, and can run continuously for a long time. There is no membrane in the field that can obtain the high flux compared to the water system, and the permeation flux of the membrane with polyamide as the skin is currently difficult to greatly improve.

Method used

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  • Anisyl alcohol solvent-resistant composite nano-filtration membrane and method for preparing same
  • Anisyl alcohol solvent-resistant composite nano-filtration membrane and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The preparation process of a kind of anisyl alcohol composite nanofiltration membrane is carried out in the constant temperature box of 25 ℃:

[0026] 1. Prepare a N,N-dimethylacetamide (DMAc) solution of polyetherimide with a mass concentration of 23%, stir it in a water bath at 60°C for 4 hours, let it stand for cooling, and then put it in a desiccator to desiccant Soak for 3 hours. The defoamed solution was evenly hung on the non-woven fabric fixed on the glass plate with a stainless steel spatula, and the distance between the knife edge and the non-woven fabric was controlled to be 150 μm. The scraped film was immediately placed in a water gel bath at 25° C., taken out after 1 hour and refrigerated to obtain a base film.

[0027] 2. Soak the base film in a methanol solution with a mass concentration of 10% ethylenediamine, soak for 1 hour, take it out, and wash it twice with deionized water to obtain a crosslinked polyetherimide film;

[0028] 3. Fix the polyether...

Embodiment 2

[0031] The preparation process of a kind of anisyl alcohol composite nanofiltration membrane is carried out in the constant temperature box of 25 ℃:

[0032] One, the mass concentration of preparation polyetherimide is 23%, and the mass concentration of calcium carbonate is 1% N, N-dimethylacetamide (DMAc) solution, stirs 4 hours in 60 ℃ of water baths, leaves standstill After cooling, put it in a desiccator for degassing for 4 hours. Hang the defoamed solution evenly on the non-woven fabric fixed on the glass plate with a stainless steel spatula, and control the distance between the knife edge and the non-woven fabric to be 150 μm. Immediately put the scraped film into a water gel bath at 25°C, take it out after 1 hour, wash it, put it in 0.1mol / L hydrochloric acid solution for 1 hour, and refrigerate to obtain a basement film.

[0033] 2. Soak the base film in a methanol solution with a mass concentration of 10% ethylenediamine, soak for 1 hour, take it out, and wash it twi...

Embodiment 3

[0037] The preparation process of a kind of anisyl alcohol composite nanofiltration membrane is carried out in the constant temperature box of 25 ℃:

[0038] One, the mass concentration of preparation polyether imide is 23%, the mass concentration of calcium carbonate is 5% N,N-dimethylacetamide (DMAc) solution, stirs 4 hours in 60 ℃ of water baths, stands to cool Finally, put it in a desiccator for degassing for 3 hours. The defoamed solution was evenly hung on the non-woven fabric fixed on the glass plate with a stainless steel spatula, and the distance between the knife edge and the non-woven fabric was controlled to be 150 μm. Immediately put the scraped film into a water gel bath at 25°C, take it out after 1 hour, wash it, put it in a 0.1 mol / L hydrochloric acid solution for 1 hour, and refrigerate to obtain a basement film.

[0039] 2. Soak the base film in a methanol solution of ethylenediamine with a mass concentration of 10%, soak it for 1 hour, take it out, and wash...

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Abstract

The invention discloses an anisyl alcohol solvent-resistant composite nano-filtration membrane and a method for preparing the same. The method includes steps of firstly, mixing polyether imide particles, calcium carbonate powder and organic solvents with one another to obtain casting membrane solution, uniformly scraping the casting membrane solution on non-woven fabrics by scraping knives, immediately placing scraped membranes in gel bath of water at the temperature of 25 DEG C, taking out the membranes, cleaning the membranes, then further placing the membranes in hydrochloric acid solutionand treating the membranes to obtain basement membranes; secondly, carrying out cross-linking reaction on the basement membranes to obtain cross-linked membranes; thirdly, immersing the cross-linked membranes in anisyl alcohol aqueous solution, taking out the cross-linked membranes, further immersing the cross-linked membranes in n-hexane solution of trimesoyl chloride and carrying out interfacialpolymerization reaction to obtain the anisyl alcohol high-flux solvent-resistant composite nano-filtration membrane. The anisyl alcohol solvent-resistant composite nano-filtration membrane and the method have the advantage that the anisyl alcohol solvent-resistant composite nano-filtration membrane prepared by the aid of the method is good in solvent resistance and high in permeation flux and separation performance.

Description

technical field [0001] The invention relates to an anisyl alcohol solvent-resistant composite nanofiltration membrane and a preparation method thereof, belonging to the field of composite membranes. Background technique [0002] In the past twenty or thirty years, various membrane separation technologies have played an increasingly important role in various scientific and technological fields. Membrane separation technology is a new technology that is simple, fast, efficient, good in selectivity, and economical and energy-saving. It has been widely used in many aspects such as water treatment, hydrometallurgy, biochemical industry, pharmaceutical industry, food industry, and primary environmental protection. , which has aroused the great attention and in-depth research of relevant experts and scholars in many countries. Membrane separation technology is developing rapidly as a new chemical separation unit operation. [0003] At present, most of the commercialized solvent-r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D61/02B01D69/12B01D67/00
CPCB01D61/027B01D67/0011B01D67/0013B01D67/0016B01D69/12B01D69/125B01D2325/30
Inventor 周阿洋葛秀涛康玮杨海斌王磊程明霞郑晓阔马文静
Owner CHUZHOU UNIV
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