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A preparation method of multi-walled carbon nanotube doped salicylic acid blend imprinted film

A technology of multi-walled carbon nanotubes and carbon nanotubes, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc. problems, to achieve the effects of good thermal stability, improved water flux and contact area, and superior molecular recognition performance of salicylic acid

Inactive Publication Date: 2017-01-04
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Membrane separation technology (membrane separation technique, MST) has been widely used in the production process of enterprises due to its advantages of high efficiency, energy saving, convenient operation, molecular level filtration, and environmental friendliness; membrane is an inorganic or highly Molecular materials, which can separate the fluid into two parts that are not connected, make one or several substances permeable, and separate other substances, but there are still some factors that limit its development in membrane separation technology, such as The current membranes (ultrafiltration, microfiltration and reverse osmosis membranes) can only achieve the separation of a certain type of substance but cannot separate a single substance, especially for organic compounds with similar structures, that is, it is impossible to single and separate certain substances. Efficient Selective Separation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Take 1.0 g chitosan and place it in 50 ml aqueous solution containing 2% acetic acid, ultrasonicate for 30 min, and continue stirring at room temperature for 24 h until it dissolves evenly. After stirring evenly, add 2.5 g multi-walled carbon nanotubes (MWCNTs) Into the mixed solution, the temperature was raised to 90 o C and mechanically stirred for 24 h, and finally the chitosan-wrapped carbon nanotube nanofluids (CHI-wrapped MWCNTsnanofluids) were sealed and stored.

[0039] (2) Take 40 ml of dimethyl sulfoxide (DMSO) as a solvent, add chitosan-wrapped carbon nanotube nanofluids (CHI-wrapped MWCNTs nanofluids) into the solvent, 34-45 o C Stir mechanically until dissolved.

[0040] (3) Add the membrane matrix cellulose acetate (CA), functional polymer chitosan (CHI) and template molecule salicylic acid (SA) to the solvent, 34-45 o Mechanically stir at C for 3-4 h to dissolve evenly to obtain a casting solution; in the casting solution, the mass fraction of chito...

Embodiment 2

[0049] (1) Take 1.0 g chitosan and place it in 50 ml aqueous solution containing 2% acetic acid, ultrasonicate for 30 min, and continue stirring at room temperature for 24 h until it dissolves evenly. After stirring evenly, add 2.5 g multi-walled carbon nanotubes (MWCNTs) Into the mixed solution, the temperature was raised to 90 o C and mechanically stirred for 24 h, and finally the chitosan-wrapped carbon nanotube nanofluids (CHI-wrapped MWCNTsnanofluids) were sealed and stored.

[0050] (2) Take 40 ml of dimethyl sulfoxide (DMSO) as a solvent, add chitosan-wrapped carbon nanotube nanofluids (CHI-wrapped MWCNTs nanofluids) into the solvent, 34-45 o C Stir mechanically until dissolved.

[0051] (3) Add the membrane matrix cellulose acetate (CA), functional polymer chitosan (CHI) and template molecule salicylic acid (SA) to the solvent, 34-45 o Mechanically stir at C for 3-4 h to dissolve evenly to obtain a casting solution; in the casting solution, the mass fraction of chito...

Embodiment 3

[0060] (1) Take 1.0 g chitosan and place it in 50 ml aqueous solution containing 2% acetic acid, ultrasonicate for 30 min, and continue stirring at room temperature for 24 h until it dissolves evenly. After stirring evenly, add 2.5 g multi-walled carbon nanotubes (MWCNTs) Into the mixed solution, the temperature was raised to 90 o C and mechanically stirred for 24 h, and finally the chitosan-wrapped carbon nanotube nanofluids (CHI-wrapped MWCNTsnanofluids) were sealed and stored.

[0061] (2) Take 40 ml of dimethyl sulfoxide (DMSO) as a solvent, add chitosan-wrapped carbon nanotube nanofluids (CHI-wrapped MWCNTs nanofluids) into the solvent, 34-45 o C Stir mechanically until dissolved.

[0062] (3) Add the membrane matrix cellulose acetate (CA), functional polymer chitosan (CHI) and template molecule salicylic acid (SA) to the solvent, 34-45 o Mechanically stir at C for 3-4 h until the solution is uniform, and the casting solution is obtained; in the casting solution, the ma...

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Abstract

The invention relates to a preparing method of a molecular imprinted blend membrane, particularly relates to a preparing method of a multiwalled carbon nanotube doped salicylic acid blend imprinted membrane, and an application in removal of an impurity salicylic acid from a water solution, and belongs to the technical field of material preparation and separation. According to the method, by adopting cellulose acetate (CA) as a matrix, chitosan (CHI) as a functional polymer and chitosan-wrapped carbon nanotubes (CHI-wrapped MWCNTs) as a nanometer additive, the molecular imprinted blend membrane having a specific recognition characteristic for salicylic acid molecules is synthesized, and is used for selective recognition and separation of the salicylic acid in a water solution. The molecular imprinted blend membrane has high adsorptivity and selectivity for the salicylic acid molecules.

Description

technical field [0001] The invention relates to a preparation method of a molecularly imprinted blend film, in particular to a preparation method of a multi-walled carbon nanotube-doped salicylic acid blend imprinted film, and its application in removing impurity salicylic acid from an aqueous solution, belonging to materials Preparation and separation technology field. Background technique [0002] Salicylic acid (SA), also known as o-hydroxybenzoic acid, is an important raw material for fine chemicals such as medicine, spices, and dyes. Drugs such as aspirin prepared from salicylic acid are commonly used analgesics, which can be used as antipyretic, analgesic, anti-inflammatory, anti-rheumatic and anti-platelet aggregation drugs for fever, pain, rheumatism, and prevention of transient ischemic attacks , myocardial infarction or other thrombosis after surgery; in addition, beauty products made of salicylic acid can make the skin metabolism process normal, help cells regene...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30B01D71/16B01D67/00
Inventor 孟敏佳何志辉闫永胜孙风权吴易霖
Owner JIANGSU UNIV
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