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Polyether block amide composite film, its preparation method and use

A technology of polyether block amide and composite membrane, which is applied in the field of composite membrane, can solve the problem that polyether block amide cannot spread uniformly on the surface of the bottom membrane, etc., and achieve improved selective separation performance, wide application prospects, and simple preparation method Effect

Active Publication Date: 2016-08-17
DALIAN EUROFILM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to propose a polyether block amide composite membrane for the problem that the above-mentioned existing polyether block amide can not be uniformly spread on the surface of the base film. Uniformly spread transition layer, the polyether block amide composite membrane has high permeability and high selectivity

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  • Polyether block amide composite film, its preparation method and use
  • Polyether block amide composite film, its preparation method and use
  • Polyether block amide composite film, its preparation method and use

Examples

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Embodiment 1

[0067] This embodiment discloses a polyether block amide composite membrane, such as figure 1 As shown, it includes a bottom membrane 1, a polyether block amide separation layer 2 and a transition layer 3 connecting the bottom membrane 1 and the polyether block amide separation layer, and the transition layer 3 includes hydrophilic silicone oil. In this example, the polyether block amide composite membrane is prepared by the following steps:

[0068] (1) Clean the surface of polysulfone (PSf) base film 1 and dry it;

[0069] (2) Dissolve polyether-modified silicone oil (Guangzhou Daoer Chemical Co., Ltd.) in deionized water in a certain proportion to prepare a transition layer solution. The concentration of polyether-modified silicone oil in the solution is 5wt.%. Dissolve in a certain proportion of ethanol / water (ethanol: water = 7:3) mixed solvent, and prepare a separation layer solution. The concentration of PEBA in the solution is 2wt.%. The above two solutions are left t...

Embodiment 2

[0076] This embodiment discloses a polyether block amide composite membrane, comprising a base film, a polyether block amide separation layer and a transition layer connecting the base film and the polyether block amide separation layer, the transition layer including a hydrophilic silicone oil. In this example, the polyether block amide composite membrane is prepared by the following steps:

[0077] (1) Clean the surface of the polyacrylonitrile (PAN) base film and dry it;

[0078] (2) Dissolve polyether-modified silicone oil (Guangzhou Daoer Chemical Co., Ltd.) in deionized water in a certain proportion to prepare a transition layer solution. The concentration of polyether-modified silicone oil in the solution is 5wt.%; Proportionally dissolved in ethanol / water (ethanol: water = 7:3) mixed solvent, prepared into a separation layer solution, the concentration of PEBA in the solution was 2wt.%; the above two solutions were left to defoam for 2 hours before use;

[0079] (3) ...

Embodiment 3

[0085] This embodiment discloses a polyether block amide composite membrane, comprising a base film, a polyether block amide separation layer and a transition layer connecting the base film and the polyether block amide separation layer, the transition layer including a hydrophilic silicone oil. In this example, the polyether block amide composite membrane is prepared by the following steps:

[0086] (1) Clean the surface of the polyacrylonitrile (PAN) base film and dry it;

[0087] (2) Dissolve amino silicone oil (Guangzhou Daoer Chemical Co., Ltd.) in n-heptane in a certain proportion to prepare a transition layer solution. The concentration of amino silicone oil in the solution is 5wt.%; dissolve PEBA particles in ethanol / water in a certain proportion (Ethanol: water = 7: 3) mixed solvent, prepared as a separation layer solution, the concentration of PEBA in the solution was 2wt.%; the above two solutions were left to defoam for 2 hours before use;

[0088] (3) Coat the s...

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Abstract

The invention provides a PEBA (Polyether block amide) composite film as well as a preparation method and application thereof. The PEBA composite film comprises a base film, a PEBA separation layer and a transition layer, wherein the transition layer is used for connecting the base film and the PEBA separation layer, and comprises hydrophilic silicone oil. The invention further discloses the preparation method for the PEBA composite film. The method comprises the step of sequentially coating a transition layer solution and a PEBA solution on the base film. The PEBA composite film provided by the invention has relatively high permeability and relatively high selectivity. The preparation method of the PEBA composite film is simple and easy to control, can be used for the gas separation and pervaporation process, and has wide application prospect.

Description

technical field [0001] The invention relates to composite membrane technology, in particular to a polyether block amide composite membrane, its preparation method and application. Background technique [0002] Polyether block amide (PEBA) material has excellent permeability and selectivity, as well as good mechanical properties and chemical stability, so it is an ideal membrane material. Membrane separation has the advantages of high efficiency, energy saving, simple operation, and easy scale-up. Practical gas separation membranes require both high flux and high separation performance. Integrated asymmetric membranes and composite membranes composed of a separation layer and a support layer can meet this requirement, but some materials with excellent performance, such as PEBA, cannot pass the commonly used The integrated asymmetric membrane is prepared by the phase inversion method, so it can only be made into a composite membrane. Usually, the composite membrane is prepar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/80B01D69/12B01D67/00B01D61/36B01D53/22
Inventor 季鹏飞李泰胧王连军王忠强曲韵翔李恕广杜国栋栗广勇
Owner DALIAN EUROFILM IND
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