A kind of polyvinylamine film with branched network structure and its preparation method and application

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

Active Publication Date: 2021-01-01
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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  • A kind of polyvinylamine film with branched network structure and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036]Example 1: Preparation of the polyvinylamine film with branched network structure of the present invention, the steps are as follows:

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

[0038](2) Preparation of polyethyleneimine modified halloysite nanotube composite material: 0.00625g of polyethyleneimine was added to 50mL of deionized water to prepare an aqueous solution of polyethyleneimine. Under the conditions of magnetic stirring at a temperature of 25 °C and a rotation speed of 60 rpm, 1 g of halloysite nanotubes were added to the above-mentioned polyethyleneimine aqueous solution at a rate of 50 mg / min to obtain a mixture of polyethyleneimine and halloysite nanotubes. The mixed solution was continuously stirred for 90 minutes, so that the polyethyleneimine was loaded on the halloysite nanot...

Embodiment 2

[0041]Example 2: Preparation of the polyvinylamine film with branched network structure of 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 the supporting membrane, soak it in a 2% ethylenediamine aqueous solution at 30°C for 72 hours, wash and dry it for use, and name it product A.

[0043](2) Preparation of polyethyleneimine modified halloysite nanotube composite material: 0.0125g of polyethyleneimine was added to 50mL of deionized water to prepare an aqueous solution of polyethyleneimine. Under the conditions of magnetic stirring at a temperature of 25 °C and a rotation speed of 60 rpm, 1 g of halloysite nanotubes were added to the above-mentioned polyethyleneimine aqueous solution at a rate of 50 mg / min to obtain a mixture of polyethyleneimine and halloysite nanotubes. The mixed solution was continuously stirred for 90 minutes, so that the polyethyleneimine was loaded on the halloysite nan...

Embodiment 3

[0046]Example 3: Preparation of the polyvinylamine film with branched network structure of 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 the supporting membrane, soak it in a 2% ethylenediamine aqueous solution at 30°C for 72 hours, wash and dry it for use, and name it product A.

[0048](2) Preparation of polyethyleneimine modified halloysite nanotube composite material: 0.025g of polyethyleneimine was added to 50mL of deionized water to prepare an aqueous solution of polyethyleneimine. Under the conditions of magnetic stirring at a temperature of 25 °C and a rotation speed of 60 rpm, 1 g of halloysite nanotubes were added to the above-mentioned polyethyleneimine aqueous solution at a rate of 50 mg / min to obtain a mixture of polyethyleneimine and halloysite nanotubes. The mixed solution was continuously stirred for 90 minutes, so that the polyethyleneimine was loaded on the halloysite nano...

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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 film is a typical fixed carrier film. Its molecular chain contains a large number of primary and secondary amine groups, which can interact with CO2Reversible chemical reaction occurs and CO is transferred preferentially2, Which has a higher CO2Selective transmission capability. The preparation process of polyvinylamine film is simple, the cost of raw materials is low, and it can be prepared on a large scale. It has a good industrial application prospect. It is CO2Research hotspots in the field of separation membranes. However, due to the strong hydrogen bonding of the amine group in the polyvinylamine film and the high crystallinity, the diffusion of gas molecules in the polyvinylamine film is poor. In addition, ...

Claims

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Application Information

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Patent Type & Authority Patents(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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