Polyvinylamine film with branched network structure as well as preparation method and application of film

A polyvinylamine membrane and network structure technology, applied in chemical instruments and methods, separation methods, membranes, etc., can solve the problems of low transfer efficiency and poor molecular chain mobility, and achieve cheap and easy-to-obtain materials and good interface compatibility. , The effect of the film making method is simple and easy to implement

Active Publication Date: 2018-11-16
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high crystallinity in the membrane and the poor mobility of molecular chains, the amine-based carrier can only passively accept CO 2 , and only swing in a small range, the transmission efficiency is low

Method used

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  • Polyvinylamine film with branched network structure as well as preparation method and application of film

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Experimental program
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Effect test

Embodiment 1

[0036] Embodiment 1: The preparation of the polyvinylamine film with branched network structure according to the present invention, the steps are as follows:

[0037] (1) Take a porous polysulfone filter membrane with a molecular weight cut-off of 6000 as a supporting membrane, soak it in 2% ethylenediamine aqueous solution at 30°C for 72 hours, wash and dry it before use, and name it product A.

[0038](2) Preparation of polyethyleneimine-modified halloysite nanotube composite material: 0.00625 g of polyethyleneimine was added to 50 mL of deionized water to prepare polyethyleneimine aqueous solution. Under the magnetic stirring condition that the temperature is 25 °C and the rotating speed is 60rpm, 1g halloysite nanotubes are added to the above-mentioned polyethyleneimine aqueous solution according to 50mg / min to obtain the mixture of polyethyleneimine and halloysite nanotubes. Mix the solution and keep stirring for 90 min, so that the polyethyleneimine is loaded on the hall...

Embodiment 2

[0041] Embodiment 2: The preparation of the polyvinylamine film with branched network structure according to the present invention, the steps are as follows:

[0042] (1) Take a porous polysulfone filter membrane with a molecular weight cut-off of 6000 as a supporting membrane, soak it in 2% ethylenediamine aqueous solution at 30°C for 72 hours, wash and dry it before use, and name it product A.

[0043] (2) Preparation of polyethyleneimine-modified halloysite nanotube composite material: 0.0125 g of polyethyleneimine was added to 50 mL of deionized water to prepare polyethyleneimine aqueous solution. Under the magnetic stirring condition that the temperature is 25 °C and the rotating speed is 60rpm, 1g halloysite nanotubes are added to the above-mentioned polyethyleneimine aqueous solution according to 50mg / min to obtain the mixture of polyethyleneimine and halloysite nanotubes. Mix the solution and keep stirring for 90 min, so that the polyethyleneimine is loaded on the hall...

Embodiment 3

[0046] Embodiment 3: The preparation of the polyvinylamine film with branched network structure according to the present invention, the steps are as follows:

[0047] (1) Take a porous polysulfone filter membrane with a molecular weight cut-off of 6000 as a supporting membrane, soak it in 2% ethylenediamine aqueous solution at 30°C for 72 hours, wash and dry it before use, and name it product A.

[0048] (2) Preparation of polyethyleneimine-modified halloysite nanotube composite material: 0.025 g of polyethyleneimine was added to 50 mL of deionized water to prepare polyethyleneimine aqueous solution. Under the magnetic stirring condition that the temperature is 25 °C and the rotating speed is 60rpm, 1g halloysite nanotubes are added to the above-mentioned polyethyleneimine aqueous solution according to 50mg / min to obtain the mixture of polyethyleneimine and halloysite nanotubes. Mix the solution and keep stirring for 90 min, so that the polyethyleneimine is loaded on the hallo...

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Abstract

The invention discloses a polyvinylamine film with a branched network structure as well as a preparation method and an application of the film. The film consists of a polyethyleneimine modified indianite tube composite and a polyvinylamine substrate in the mass ratio being (0.1-5.0):100. Firstly, polyethyleneimine with a branched network structure is supported on indianite nanotubes with an electrostatic self-assembling technology, then, the polyethyleneimine modified indianite nanotubes and polyvinylamine are blended, a membrane casting solution is obtained and applied to the surface of a microporous filter membrane, and the functional polyvinylamine film with the branched network structure is prepared and has the thickness of 1-100 mu m. By means of the polyethyleneimine modified indianite nanotubes, crystallization of polyvinylamine molecular chains can be reduced, the polyethyleneimine modified indianite nanotubes with the branched network structure are uniformly dispersed in the polyvinylamine film, and a rapid delivery channel is provided for CO2.

Description

technical field [0001] The invention relates to a polyvinylamine membrane with a branched network structure and a preparation method and application thereof, belonging to the technical field of chemical engineering membrane separation. Background technique [0002] Polyvinylamine membrane is a typical immobilized carrier membrane, and its molecular chain contains a large number of primary and secondary amine groups, which can be combined with CO 2 A reversible chemical reaction occurs that preferentially transfers CO 2 , thus having a higher CO 2 Selective transfer capability. The preparation process of polyvinylamine membrane is simple, the cost of raw materials is low, it can be prepared on a large scale, and it has good industrial application prospects. 2 Research hotspots in the field of separation membranes. However, due to the strong hydrogen bond of the amine groups in the polyvinylamine film and the high degree of crystallinity, the diffusion of gas molecules in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/60B01D67/00B01D69/02B01D53/22
CPCB01D53/228B01D67/0079B01D69/02B01D71/60B01D2257/504B01D2323/50Y02C20/40
Inventor 王永洪张新儒侯蒙杰刘成岑
Owner TAIYUAN UNIV OF TECH
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