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Amine modified fibrous membrane adsorption material and preparation method thereof

A technology of adsorption materials and fiber membranes, applied in chemical instruments and methods, other chemical processes, alkali metal oxides/hydroxides, etc., can solve the problems of strong anti-interference ability of coexisting cations, difficult control of grafting and amination reactions, The problem of using a large amount of organic reagents, etc., achieves the effects of strong anti-interference ability of coexisting cations, easy control of amination process and yield, and simple preparation method

Inactive Publication Date: 2015-12-30
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0017] In view of the deficiencies in the preparation process of existing fiber adsorption materials: 1) the amount of organic reagents used is large, and the reaction is not easy to control; The preparation process is cumbersome and lengthy, and it is difficult for practical application. 4) The ion exchange fiber / fiber membrane has weak anti-interference ability of coexisting cations
The preparation method in this invention is simple and the raw materials are easy to obtain. It not only solves the problems of large amount of organic solvent used in the preparation process of the original fiber adsorption material and the difficulty in controlling the grafting and amination reactions, but also the prepared fiber membrane is not easy to use during use. Knotted, fully in contact with pollutants, high adsorption capacity for heavy metal ions, and strong anti-interference ability of coexisting cations

Method used

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  • Amine modified fibrous membrane adsorption material and preparation method thereof
  • Amine modified fibrous membrane adsorption material and preparation method thereof
  • Amine modified fibrous membrane adsorption material and preparation method thereof

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Embodiment 1

[0047] A method for preparing an amine-modified fibrous membrane-like adsorbent, the steps comprising:

[0048] (1) Dissolve polyacrylonitrile and N,N-dimethylformamide DMF at a weight ratio of 1:3, stir and dissolve at 30°C for 5 hours, and the molecular weight of polyacrylonitrile is 85,000;

[0049] (2) Add the amination reaction reagent diethylenetriamine to the above solution, the mass ratio of polyacrylonitrile to the reaction reagent is 1:3, under the condition of stirring at 70°C and 200rpm, carry out the amination reaction for 2 hours, and obtain static electricity after cooling. Spinning liquid, move the liquid matrix into the syringe of the electrospinning machine, adjust the diameter of the spinneret, voltage, spinneret rate, humidity, receiving distance and drum speed, and perform electrospinning to obtain an amine-modified nanofiber membrane. Electrospinning process parameters are: voltage 10KV, nozzle aperture 0.4mm, solution flow rate 0.1mL / h, ambient temperatu...

Embodiment 2

[0061] A method for preparing an amine-modified fibrous membrane-like adsorbent, the steps comprising:

[0062] (1) Dissolve polyacrylonitrile and N,N-dimethylformamide DMF at a weight ratio of 1:4, stir and dissolve at 40°C for 8 hours, the concentration of the electrospinning solution is 20% by weight, polypropylene Nitrile has a molecular weight of 90,000.

[0063] (2) Add the amination reaction reagent diethylenetriamine to the above solution. The mass ratio of polyacrylonitrile to the reaction reagent is 1:3. Under the condition of stirring at 80°C and 200rpm, the amination reaction is carried out for 8h, and after cooling, static electricity is obtained. Spinning liquid, move the liquid matrix into the syringe of the electrospinning machine, adjust the diameter of the spinneret, voltage, spinneret rate, humidity, receiving distance and drum speed, and perform electrospinning to obtain an amine-modified nanofiber membrane. Electrospinning process parameters are: voltage ...

Embodiment 3

[0069] A method for preparing an amine-modified fibrous membrane-like adsorbent, the steps comprising:

[0070] (1) Dissolve polyacrylonitrile and N,N-dimethylformamide DMF at a weight ratio of 1:9, stir and dissolve at 40°C for 8 hours, the concentration of the electrospinning solution is 10% by weight, polypropylene Nitrile has a molecular weight of 95,000.

[0071] (2) Add the amination reaction reagent diethylenetriamine to the above solution, the mass ratio of polyacrylonitrile to the reaction reagent is 1:3, under the condition of stirring at 90°C and 200rpm, carry out the amination reaction for 12h, and obtain static electricity after cooling. Spinning liquid, move the liquid matrix into the syringe of the electrospinning machine, adjust the diameter of the spinneret, voltage, spinneret rate, humidity, receiving distance and drum speed, and perform electrospinning to obtain an amine-modified nanofiber membrane. Electrospinning process parameters are: voltage 16KV, nozz...

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Abstract

The invention discloses an amine modified fibrous membrane adsorption material and a preparation method thereof and belongs to the field of synthesis and application of environment function materials. Polyacrylonitrile powder is taken as a matrix, a liquid matrix is prepared through solid phase graft polymerization and amination, electrostatic spinning is performed, and the novel fibrous membrane adsorption material is prepared. The synthetic method is simple, the amination efficiency is high, a large quantity of swelling agents and amination reagents can be saved, and the prepared membrane adsorption material has a high hydrophilic surface and can be applied to a flat sheet membrane filtration assembly; when water passes through a fibrous membrane, surface groups can efficiently adsorb and remove multiple heavy metal ions in water, and the fibrous membrane which is saturated after adsorption can be reused after desorption and regeneration.

Description

Technical field: [0001] The invention discloses an adsorption material and a preparation method thereof, more specifically an amine-modified fibrous membrane-like adsorption material and a preparation method thereof, an amine-modified fiber-membrane adsorption material based on a polyacrylonitrile matrix and its preparation method. Background technique: [0002] In recent years, ion exchange fibers, chelating fibers, and existing fiber membrane materials have been widely used in the field of water treatment and purification. Ion exchange fiber and chelating fiber have the advantages of fast adsorption rate, large adsorption capacity, and not easy to be broken and lost. Yet there are following deficiencies in preparation method and application process: [0003] (1) Ion exchange fiber and chelating fiber [0004] Public patent 1: patent name: an amine-modified fibrous emergency adsorption material and its preparation method, patent application number: ZL2011104274558; and p...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28B01J20/30
Inventor 王津南王达道吴燕
Owner NANJING UNIV
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