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Method for preparing composite membrane through interfacial polymerization and reaction device

A technology of interfacial polymerization and reaction device, which is applied in chemical instruments and methods, chemical/physical/physical-chemical fixed reactors, membranes, etc., and can solve problems such as difficulty in achieving equipment and reaction conditions.

Pending Publication Date: 2020-12-15
HEFEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The prepared membrane layer has indeed achieved an ordered porous structure, and the permeability and selectivity of the membrane layer have been improved. However, the preparation method requires high temperature and high pressure to achieve, and the equipment and reaction conditions are difficult to achieve.

Method used

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  • Method for preparing composite membrane through interfacial polymerization and reaction device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Interfacial polymerization of the present invention is a composite membrane reactor, the support A polyacrylonitrile ultrafiltration membrane, the support member A was cut into two identical half-vitro cuff size and shape of the reaction apparatus, the reaction apparatus is assembled for use.

[0026] Prepared solution: aqueous phase concentration para-phenylenediamine 0.0225mol / L, L aqueous solution of p-toluenesulfonic acid concentration 0.0675mol / , the organic phase is between three phloroglucinol aldehyde concentration 0.0075mol / L in n-hexane.

[0027] After the biphasic solution were added simultaneously as possible on both sides of the cavity to the supporting body A, and on both sides of the liquid level height remains the same, gradually forming a polymer film on one side of a support an organic phase solution A, and reacted for 24 hours to complete the reaction, while the solution was poured out of the sides, removing the support a is the composite membrane pr...

Embodiment 2

[0029] Using the same method as in Example 1 composite membrane, wherein a concentration of the aqueous phase is benzidine 0.05mol / L, an aqueous solution of L-toluenesulfonic acid concentration of 0.15mol / , the organic phase was pyrogallol among the three aldehyde concentration was 0.016mol / L in n-hexane, the reaction time was 6 hours, the resulting polymer composite film layer having a thickness of 50nm.

[0030] Using the same method as in Example 1. The resulting composite membrane is detected, the detection results recorded in Table 1.

Embodiment 3

[0032] Composite membrane prepared using the same method as in Example 1, the aqueous phase is benzidine concentration of 0.04mol / L, p-toluenesulfonic acid at a concentration of 0.12mol L aqueous / organic phase is among the three phloroglucinol aldehyde concentration was 0.011mol / L in n-hexane, the reaction time was 4 hours, the resulting polymer composite film layer having a thickness of 30nm.

[0033] Using the same method as in Example 1. The resulting composite membrane is detected, the detection results recorded in Table 1.

[0034] Table 1 Example 1-3 Detection results of the composite film obtained

[0035] Permeability coefficient (L / M 2 · H · bar)

[0036] It can be seen from Table 1 that the COFS composite film prepared by the solution of the present invention is greatly improved.

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Abstract

The invention belongs to the field of membrane preparation, and particularly relates to a method for preparing a composite membrane through interfacial polymerization. Themethod comprises the steps ofvertically fixing a support body in a reaction container with a liquid cavity, dividing the accommodating cavity of the reaction container into two parts by the support body, respectively adding a water phase and an organic phase into the two parts of the accommodating cavity, and standing; and after the two phases react and a polymer membrane layer is formed on the surface of the support body, ending the reaction to obtain the support body attached with the polymer membrane layer, namely the composite membrane; and solvents of the water phase and the organic phase being immiscible, and solutes in the water phase and the organic phase reacting with each other to form a polymer layer. The invention further relates to a reaction device adopting the method for preparing the composite membrane through interfacial polymerization. The reaction device comprises a container and a clamping mechanism, the clamping mechanism vertically fixes the supporting body in the container and divides the accommodating cavity of the container into a left part and a right part, and the two parts of accommodating cavity are respectively provided with a feeding port.

Description

Technical field [0001] The present invention is in the field of the film, particularly relates to a method for preparation of composite membranes and the reaction apparatus interfacial polymerization reaction. Background technique [0002] Interfacial polymerization reaction is immiscible in both were dissolved (organic phase or at the interface side) of the interface between the two monomers was carried out polycondensation reaction, the reaction resulting polymer is insoluble in a solvent, in the interface precipitation. With the composite film technology, it was gradually applied to the preparation of interfacial polymerisation composite membranes, i.e., ultrafiltration or microporous membrane as a support layer film, using an interfacial polymerization reaction of the surface covered with a dense layer of the support film are for the separation layer, the resulting film has a special separation. [0003] "Interfacial polymerization" (Tangbei Bei et al., "Advances in Chemistry...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/24B01D69/12B01D67/00
CPCB01J19/247B01D69/125B01D67/0006B01D2323/42
Inventor 刘峤徐农董强范茏丁爱琴巴塞尔·尼德拉臧鹏
Owner HEFEI UNIV
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